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  <channel>
    <title>Viddler &gt; Global Tag - optical</title>
    <link>http://www.viddler.com/explore/tags/global/optical/</link>
    <description>Videos tagged with optical</description>
    <pubDate>Fri, 08 Jan 2010 16:09:41 GMT</pubDate>
    <image>
      <title>viddler</title>
      <url>http://www.viddler.com/css/images/viddler.gif</url>
      <link>http://www.viddler.com/</link>
      <description>Viddler.com - Upload, Enhance, Share</description>
    </image>
    <item>
      <title>Mind blowing optical illusions</title>
      <link>http://www.viddler.com/explore/thechive/videos/63/</link>
      <description>&lt;p&gt;&lt;a href=&quot;http://www.viddler.com/explore/thechive/videos/63/&quot; title=&quot;Mind blowing optical illusions&quot; &gt;&lt;img src=&quot;http://cdn-thumbs.viddler.com/thumbnail_1_cd7eedf.jpg&quot; width=&quot;114&quot; height=&quot;86&quot; alt=&quot;Mind blowing optical illusions&quot; border=&quot;0&quot; /&gt;&lt;/a&gt;&lt;/p&gt;&#xD;
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Mind blowing optical illusion video&lt;p&gt; By &lt;a href=&quot;http://www.viddler.com/explore/thechive/&quot; &gt;thechive&lt;/a&gt;&lt;/p&gt;&#xD;
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&lt;p&gt; Tags : &lt;a href=&quot;http://www.viddler.com/explore/thechive/tags/illusion&quot;&gt;illusion&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/thechive/tags/optical&quot;&gt;optical&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/thechive/tags/video&quot;&gt;video&lt;/a&gt;&lt;/p&gt;</description>
      <enclosure url="http://www.viddler.com/player/cd7eedf/" length="78" type="application/x-shockwave-flash" />
      <pubDate>Sun, 20 Dec 2009 16:27:01 GMT</pubDate>
      <guid>http://www.viddler.com/explore/thechive/videos/63/</guid>
      <media:content url="http://www.viddler.com/explore/thechive/videos/63/">
        <media:player url="http://www.viddler.com/explore/thechive/videos/63/" />
        <media:category label="Tags">illusion optical video</media:category>
        <media:credit role="author" scheme="urn:ebu">thechive</media:credit>
        <media:thumbnail url="http://cdn-thumbs.viddler.com/thumbnail_1_cd7eedf.jpg" width="114" height="84" />
        <media:title>Mind blowing optical illusions</media:title>
      </media:content>
    </item>
    <item>
      <title>Video Brain Teaser #58</title>
      <link>http://www.viddler.com/explore/videomathtutor/videos/110/</link>
      <description>&lt;p&gt;&lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/videos/110/&quot; title=&quot;Video Brain Teaser #58&quot; &gt;&lt;img src=&quot;http://cdn-thumbs.viddler.com/thumbnail_1_a4398a59_v1.jpg&quot; width=&quot;114&quot; height=&quot;86&quot; alt=&quot;Video Brain Teaser #58&quot; border=&quot;0&quot; /&gt;&lt;/a&gt;&lt;/p&gt;&#xD;
&#xD;
Videos that provide viewers with brain teasers/mental puzzles. These may consist of problems dealing with the arrangement of matchsticks, coins, and other items. May include pencil drawing games, optical illusions, hidden images and "Find the Twin" problems.&lt;p&gt; By &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/&quot; &gt;videomathtutor&lt;/a&gt;&lt;/p&gt;&#xD;
&#xD;
&lt;p&gt; Tags : &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/Game&quot;&gt;Game&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/brain&quot;&gt;brain&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/challenge&quot;&gt;challenge&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/find&quot;&gt;find&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/hidden&quot;&gt;hidden&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/illusion&quot;&gt;illusion&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/image&quot;&gt;image&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/optical&quot;&gt;optical&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/puzzle&quot;&gt;puzzle&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/teaser&quot;&gt;teaser&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/twin&quot;&gt;twin&lt;/a&gt;&lt;/p&gt;</description>
      <enclosure url="http://www.viddler.com/player/a4398a59/" length="110" type="application/x-shockwave-flash" />
      <pubDate>Fri, 04 Dec 2009 02:42:00 GMT</pubDate>
      <guid>http://www.viddler.com/explore/videomathtutor/videos/110/</guid>
      <media:content url="http://www.viddler.com/explore/videomathtutor/videos/110/">
        <media:player url="http://www.viddler.com/explore/videomathtutor/videos/110/" />
        <media:category label="Tags">Game brain challenge find hidden illusion image optical puzzle teaser twin</media:category>
        <media:credit role="author" scheme="urn:ebu">videomathtutor</media:credit>
        <media:thumbnail url="http://cdn-thumbs.viddler.com/thumbnail_1_a4398a59_v1.jpg" width="114" height="84" />
        <media:title>Video Brain Teaser #58</media:title>
      </media:content>
    </item>
    <item>
      <title>Video Brain Teaser #57</title>
      <link>http://www.viddler.com/explore/videomathtutor/videos/109/</link>
      <description>&lt;p&gt;&lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/videos/109/&quot; title=&quot;Video Brain Teaser #57&quot; &gt;&lt;img src=&quot;http://cdn-thumbs.viddler.com/thumbnail_1_2109924a_v1.jpg&quot; width=&quot;114&quot; height=&quot;86&quot; alt=&quot;Video Brain Teaser #57&quot; border=&quot;0&quot; /&gt;&lt;/a&gt;&lt;/p&gt;&#xD;
&#xD;
Videos that provide viewers with brain teasers/mental puzzles. These may consist of problems dealing with the arrangement of matchsticks, coins, and other items. May include pencil drawing games, optical illusions, hidden images and "Find the Twin" problems.&lt;p&gt; By &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/&quot; &gt;videomathtutor&lt;/a&gt;&lt;/p&gt;&#xD;
&#xD;
&lt;p&gt; Tags : &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/Game&quot;&gt;Game&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/brain&quot;&gt;brain&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/challenge&quot;&gt;challenge&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/find&quot;&gt;find&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/hidden&quot;&gt;hidden&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/illusion&quot;&gt;illusion&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/image&quot;&gt;image&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/optical&quot;&gt;optical&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/puzzle&quot;&gt;puzzle&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/teaser&quot;&gt;teaser&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/twin&quot;&gt;twin&lt;/a&gt;&lt;/p&gt;</description>
      <enclosure url="http://www.viddler.com/player/2109924a/" length="60" type="application/x-shockwave-flash" />
      <pubDate>Fri, 04 Dec 2009 02:41:03 GMT</pubDate>
      <guid>http://www.viddler.com/explore/videomathtutor/videos/109/</guid>
      <media:content url="http://www.viddler.com/explore/videomathtutor/videos/109/">
        <media:player url="http://www.viddler.com/explore/videomathtutor/videos/109/" />
        <media:category label="Tags">Game brain challenge find hidden illusion image optical puzzle teaser twin</media:category>
        <media:credit role="author" scheme="urn:ebu">videomathtutor</media:credit>
        <media:thumbnail url="http://cdn-thumbs.viddler.com/thumbnail_1_2109924a_v1.jpg" width="114" height="84" />
        <media:title>Video Brain Teaser #57</media:title>
      </media:content>
    </item>
    <item>
      <title>Video Brain Teaser #56</title>
      <link>http://www.viddler.com/explore/videomathtutor/videos/108/</link>
      <description>&lt;p&gt;&lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/videos/108/&quot; title=&quot;Video Brain Teaser #56&quot; &gt;&lt;img src=&quot;http://cdn-thumbs.viddler.com/thumbnail_1_8f5e5778_v1.jpg&quot; width=&quot;114&quot; height=&quot;86&quot; alt=&quot;Video Brain Teaser #56&quot; border=&quot;0&quot; /&gt;&lt;/a&gt;&lt;/p&gt;&#xD;
&#xD;
Videos that provide viewers with brain teasers/mental puzzles. These may consist of problems dealing with the arrangement of matchsticks, coins, and other items. May include pencil drawing games, optical illusions, hidden images and "Find the Twin" problems.&lt;p&gt; By &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/&quot; &gt;videomathtutor&lt;/a&gt;&lt;/p&gt;&#xD;
&#xD;
&lt;p&gt; Tags : &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/Game&quot;&gt;Game&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/brain&quot;&gt;brain&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/challenge&quot;&gt;challenge&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/find&quot;&gt;find&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/hidden&quot;&gt;hidden&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/illusion&quot;&gt;illusion&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/image&quot;&gt;image&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/optical&quot;&gt;optical&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/puzzle&quot;&gt;puzzle&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/teaser&quot;&gt;teaser&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/twin&quot;&gt;twin&lt;/a&gt;&lt;/p&gt;</description>
      <enclosure url="http://www.viddler.com/player/8f5e5778/" length="63" type="application/x-shockwave-flash" />
      <pubDate>Fri, 04 Dec 2009 02:41:03 GMT</pubDate>
      <guid>http://www.viddler.com/explore/videomathtutor/videos/108/</guid>
      <media:content url="http://www.viddler.com/explore/videomathtutor/videos/108/">
        <media:player url="http://www.viddler.com/explore/videomathtutor/videos/108/" />
        <media:category label="Tags">Game brain challenge find hidden illusion image optical puzzle teaser twin</media:category>
        <media:credit role="author" scheme="urn:ebu">videomathtutor</media:credit>
        <media:thumbnail url="http://cdn-thumbs.viddler.com/thumbnail_1_8f5e5778_v1.jpg" width="114" height="84" />
        <media:title>Video Brain Teaser #56</media:title>
      </media:content>
    </item>
    <item>
      <title>Video Brain Teaser #55</title>
      <link>http://www.viddler.com/explore/videomathtutor/videos/107/</link>
      <description>&lt;p&gt;&lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/videos/107/&quot; title=&quot;Video Brain Teaser #55&quot; &gt;&lt;img src=&quot;http://cdn-thumbs.viddler.com/thumbnail_1_4f236e5d_v1.jpg&quot; width=&quot;114&quot; height=&quot;86&quot; alt=&quot;Video Brain Teaser #55&quot; border=&quot;0&quot; /&gt;&lt;/a&gt;&lt;/p&gt;&#xD;
&#xD;
Videos that provide viewers with brain teasers/mental puzzles. These may consist of problems dealing with the arrangement of matchsticks, coins, and other items. May include pencil drawing games, optical illusions, hidden images and "Find the Twin" problems.&lt;p&gt; By &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/&quot; &gt;videomathtutor&lt;/a&gt;&lt;/p&gt;&#xD;
&#xD;
&lt;p&gt; Tags : &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/Game&quot;&gt;Game&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/brain&quot;&gt;brain&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/challenge&quot;&gt;challenge&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/find&quot;&gt;find&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/hidden&quot;&gt;hidden&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/illusion&quot;&gt;illusion&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/image&quot;&gt;image&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/optical&quot;&gt;optical&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/puzzle&quot;&gt;puzzle&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/teaser&quot;&gt;teaser&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/twin&quot;&gt;twin&lt;/a&gt;&lt;/p&gt;</description>
      <enclosure url="http://www.viddler.com/player/4f236e5d/" length="57" type="application/x-shockwave-flash" />
      <pubDate>Fri, 04 Dec 2009 02:38:02 GMT</pubDate>
      <guid>http://www.viddler.com/explore/videomathtutor/videos/107/</guid>
      <media:content url="http://www.viddler.com/explore/videomathtutor/videos/107/">
        <media:player url="http://www.viddler.com/explore/videomathtutor/videos/107/" />
        <media:category label="Tags">Game brain challenge find hidden illusion image optical puzzle teaser twin</media:category>
        <media:credit role="author" scheme="urn:ebu">videomathtutor</media:credit>
        <media:thumbnail url="http://cdn-thumbs.viddler.com/thumbnail_1_4f236e5d_v1.jpg" width="114" height="84" />
        <media:title>Video Brain Teaser #55</media:title>
      </media:content>
    </item>
    <item>
      <title>Video Brain Teaser #54</title>
      <link>http://www.viddler.com/explore/videomathtutor/videos/106/</link>
      <description>&lt;p&gt;&lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/videos/106/&quot; title=&quot;Video Brain Teaser #54&quot; &gt;&lt;img src=&quot;http://cdn-thumbs.viddler.com/thumbnail_1_20468c07_v1.jpg&quot; width=&quot;114&quot; height=&quot;86&quot; alt=&quot;Video Brain Teaser #54&quot; border=&quot;0&quot; /&gt;&lt;/a&gt;&lt;/p&gt;&#xD;
&#xD;
Videos that provide viewers with brain teasers/mental puzzles. These may consist of problems dealing with the arrangement of matchsticks, coins, and other items. May include pencil drawing games, optical illusions, hidden images and "Find the Twin" problems.&lt;p&gt; By &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/&quot; &gt;videomathtutor&lt;/a&gt;&lt;/p&gt;&#xD;
&#xD;
&lt;p&gt; Tags : &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/Game&quot;&gt;Game&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/brain&quot;&gt;brain&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/challenge&quot;&gt;challenge&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/find&quot;&gt;find&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/fun&quot;&gt;fun&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/game.&quot;&gt;game.&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/hidden&quot;&gt;hidden&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/illusion&quot;&gt;illusion&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/image&quot;&gt;image&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/math&quot;&gt;math&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/optical&quot;&gt;optical&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/puzzle&quot;&gt;puzzle&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/riddle&quot;&gt;riddle&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/teaser&quot;&gt;teaser&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/twin&quot;&gt;twin&lt;/a&gt;&lt;/p&gt;</description>
      <enclosure url="http://www.viddler.com/player/20468c07/" length="50" type="application/x-shockwave-flash" />
      <pubDate>Fri, 04 Dec 2009 01:03:01 GMT</pubDate>
      <guid>http://www.viddler.com/explore/videomathtutor/videos/106/</guid>
      <media:content url="http://www.viddler.com/explore/videomathtutor/videos/106/">
        <media:player url="http://www.viddler.com/explore/videomathtutor/videos/106/" />
        <media:category label="Tags">Game brain challenge find fun game. hidden illusion image math optical puzzle riddle teaser twin</media:category>
        <media:credit role="author" scheme="urn:ebu">videomathtutor</media:credit>
        <media:thumbnail url="http://cdn-thumbs.viddler.com/thumbnail_1_20468c07_v1.jpg" width="114" height="84" />
        <media:title>Video Brain Teaser #54</media:title>
      </media:content>
    </item>
    <item>
      <title>Video Brain Teaser #53</title>
      <link>http://www.viddler.com/explore/videomathtutor/videos/105/</link>
      <description>&lt;p&gt;&lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/videos/105/&quot; title=&quot;Video Brain Teaser #53&quot; &gt;&lt;img src=&quot;http://cdn-thumbs.viddler.com/thumbnail_1_f7a8001a_v1.jpg&quot; width=&quot;114&quot; height=&quot;86&quot; alt=&quot;Video Brain Teaser #53&quot; border=&quot;0&quot; /&gt;&lt;/a&gt;&lt;/p&gt;&#xD;
&#xD;
Videos that provide viewers with brain teasers/mental puzzles. These may consist of problems dealing with the arrangement of matchsticks, coins, and other items. May include pencil drawing games, optical illusions, hidden images and "Find the Twin" problems.&lt;p&gt; By &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/&quot; &gt;videomathtutor&lt;/a&gt;&lt;/p&gt;&#xD;
&#xD;
&lt;p&gt; Tags : &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/Game&quot;&gt;Game&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/brain&quot;&gt;brain&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/challenge&quot;&gt;challenge&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/find&quot;&gt;find&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/fun&quot;&gt;fun&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/game.&quot;&gt;game.&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/hidden&quot;&gt;hidden&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/illusion&quot;&gt;illusion&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/image&quot;&gt;image&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/math&quot;&gt;math&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/optical&quot;&gt;optical&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/puzzle&quot;&gt;puzzle&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/riddle&quot;&gt;riddle&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/teaser&quot;&gt;teaser&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/twin&quot;&gt;twin&lt;/a&gt;&lt;/p&gt;</description>
      <enclosure url="http://www.viddler.com/player/f7a8001a/" length="49" type="application/x-shockwave-flash" />
      <pubDate>Fri, 04 Dec 2009 01:01:05 GMT</pubDate>
      <guid>http://www.viddler.com/explore/videomathtutor/videos/105/</guid>
      <media:content url="http://www.viddler.com/explore/videomathtutor/videos/105/">
        <media:player url="http://www.viddler.com/explore/videomathtutor/videos/105/" />
        <media:category label="Tags">Game brain challenge find fun game. hidden illusion image math optical puzzle riddle teaser twin</media:category>
        <media:credit role="author" scheme="urn:ebu">videomathtutor</media:credit>
        <media:thumbnail url="http://cdn-thumbs.viddler.com/thumbnail_1_f7a8001a_v1.jpg" width="114" height="84" />
        <media:title>Video Brain Teaser #53</media:title>
      </media:content>
    </item>
    <item>
      <title>Video Brain Teaser #52</title>
      <link>http://www.viddler.com/explore/videomathtutor/videos/104/</link>
      <description>&lt;p&gt;&lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/videos/104/&quot; title=&quot;Video Brain Teaser #52&quot; &gt;&lt;img src=&quot;http://cdn-thumbs.viddler.com/thumbnail_1_1c21333c_v1.jpg&quot; width=&quot;114&quot; height=&quot;86&quot; alt=&quot;Video Brain Teaser #52&quot; border=&quot;0&quot; /&gt;&lt;/a&gt;&lt;/p&gt;&#xD;
&#xD;
Videos that provide viewers with brain teasers/mental puzzles. These may consist of problems dealing with the arrangement of matchsticks, coins, and other items. May include pencil drawing games, optical illusions, hidden images and "Find the Twin" problems.&lt;p&gt; By &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/&quot; &gt;videomathtutor&lt;/a&gt;&lt;/p&gt;&#xD;
&#xD;
&lt;p&gt; Tags : &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/Game&quot;&gt;Game&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/brain&quot;&gt;brain&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/challenge&quot;&gt;challenge&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/find&quot;&gt;find&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/fun&quot;&gt;fun&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/game.&quot;&gt;game.&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/hidden&quot;&gt;hidden&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/illusion&quot;&gt;illusion&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/image&quot;&gt;image&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/math&quot;&gt;math&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/optical&quot;&gt;optical&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/puzzle&quot;&gt;puzzle&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/riddle&quot;&gt;riddle&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/teaser&quot;&gt;teaser&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/twin&quot;&gt;twin&lt;/a&gt;&lt;/p&gt;</description>
      <enclosure url="http://www.viddler.com/player/1c21333c/" length="49" type="application/x-shockwave-flash" />
      <pubDate>Fri, 04 Dec 2009 01:01:04 GMT</pubDate>
      <guid>http://www.viddler.com/explore/videomathtutor/videos/104/</guid>
      <media:content url="http://www.viddler.com/explore/videomathtutor/videos/104/">
        <media:player url="http://www.viddler.com/explore/videomathtutor/videos/104/" />
        <media:category label="Tags">Game brain challenge find fun game. hidden illusion image math optical puzzle riddle teaser twin</media:category>
        <media:credit role="author" scheme="urn:ebu">videomathtutor</media:credit>
        <media:thumbnail url="http://cdn-thumbs.viddler.com/thumbnail_1_1c21333c_v1.jpg" width="114" height="84" />
        <media:title>Video Brain Teaser #52</media:title>
      </media:content>
    </item>
    <item>
      <title>Video Brain Teaser #51</title>
      <link>http://www.viddler.com/explore/videomathtutor/videos/103/</link>
      <description>&lt;p&gt;&lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/videos/103/&quot; title=&quot;Video Brain Teaser #51&quot; &gt;&lt;img src=&quot;http://cdn-thumbs.viddler.com/thumbnail_1_e91fe451_v1.jpg&quot; width=&quot;114&quot; height=&quot;86&quot; alt=&quot;Video Brain Teaser #51&quot; border=&quot;0&quot; /&gt;&lt;/a&gt;&lt;/p&gt;&#xD;
&#xD;
Videos that provide viewers with brain teasers/mental puzzles. These may consist of problems dealing with the arrangement of matchsticks, coins, and other items. May include pencil drawing games, optical illusions, hidden images and "Find the Twin" problems.&lt;p&gt; By &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/&quot; &gt;videomathtutor&lt;/a&gt;&lt;/p&gt;&#xD;
&#xD;
&lt;p&gt; Tags : &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/Game&quot;&gt;Game&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/brain&quot;&gt;brain&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/challenge&quot;&gt;challenge&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/find&quot;&gt;find&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/fun&quot;&gt;fun&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/game.&quot;&gt;game.&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/hidden&quot;&gt;hidden&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/illusion&quot;&gt;illusion&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/image&quot;&gt;image&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/math&quot;&gt;math&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/optical&quot;&gt;optical&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/puzzle&quot;&gt;puzzle&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/riddle&quot;&gt;riddle&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/teaser&quot;&gt;teaser&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/twin&quot;&gt;twin&lt;/a&gt;&lt;/p&gt;</description>
      <enclosure url="http://www.viddler.com/player/e91fe451/" length="49" type="application/x-shockwave-flash" />
      <pubDate>Fri, 04 Dec 2009 01:01:00 GMT</pubDate>
      <guid>http://www.viddler.com/explore/videomathtutor/videos/103/</guid>
      <media:content url="http://www.viddler.com/explore/videomathtutor/videos/103/">
        <media:player url="http://www.viddler.com/explore/videomathtutor/videos/103/" />
        <media:category label="Tags">Game brain challenge find fun game. hidden illusion image math optical puzzle riddle teaser twin</media:category>
        <media:credit role="author" scheme="urn:ebu">videomathtutor</media:credit>
        <media:thumbnail url="http://cdn-thumbs.viddler.com/thumbnail_1_e91fe451_v1.jpg" width="114" height="84" />
        <media:title>Video Brain Teaser #51</media:title>
      </media:content>
    </item>
    <item>
      <title>Video Brain Teaser #50</title>
      <link>http://www.viddler.com/explore/videomathtutor/videos/102/</link>
      <description>&lt;p&gt;&lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/videos/102/&quot; title=&quot;Video Brain Teaser #50&quot; &gt;&lt;img src=&quot;http://cdn-thumbs.viddler.com/thumbnail_1_91ef8273_v1.jpg&quot; width=&quot;114&quot; height=&quot;86&quot; alt=&quot;Video Brain Teaser #50&quot; border=&quot;0&quot; /&gt;&lt;/a&gt;&lt;/p&gt;&#xD;
&#xD;
Videos that provide viewers with brain teasers/mental puzzles. These may consist of problems dealing with the arrangement of matchsticks, coins, and other items. May include pencil drawing games, optical illusions, hidden images and "Find the Twin" problems.&lt;p&gt; By &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/&quot; &gt;videomathtutor&lt;/a&gt;&lt;/p&gt;&#xD;
&#xD;
&lt;p&gt; Tags : &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/Game&quot;&gt;Game&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/brain&quot;&gt;brain&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/challenge&quot;&gt;challenge&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/find&quot;&gt;find&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/fun&quot;&gt;fun&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/game.&quot;&gt;game.&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/hidden&quot;&gt;hidden&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/illusion&quot;&gt;illusion&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/image&quot;&gt;image&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/math&quot;&gt;math&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/optical&quot;&gt;optical&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/puzzle&quot;&gt;puzzle&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/riddle&quot;&gt;riddle&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/teaser&quot;&gt;teaser&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/twin&quot;&gt;twin&lt;/a&gt;&lt;/p&gt;</description>
      <enclosure url="http://www.viddler.com/player/91ef8273/" length="49" type="application/x-shockwave-flash" />
      <pubDate>Fri, 04 Dec 2009 01:01:07 GMT</pubDate>
      <guid>http://www.viddler.com/explore/videomathtutor/videos/102/</guid>
      <media:content url="http://www.viddler.com/explore/videomathtutor/videos/102/">
        <media:player url="http://www.viddler.com/explore/videomathtutor/videos/102/" />
        <media:category label="Tags">Game brain challenge find fun game. hidden illusion image math optical puzzle riddle teaser twin</media:category>
        <media:credit role="author" scheme="urn:ebu">videomathtutor</media:credit>
        <media:thumbnail url="http://cdn-thumbs.viddler.com/thumbnail_1_91ef8273_v1.jpg" width="114" height="84" />
        <media:title>Video Brain Teaser #50</media:title>
      </media:content>
    </item>
    <item>
      <title>Video Brain Teaser #49</title>
      <link>http://www.viddler.com/explore/videomathtutor/videos/101/</link>
      <description>&lt;p&gt;&lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/videos/101/&quot; title=&quot;Video Brain Teaser #49&quot; &gt;&lt;img src=&quot;http://cdn-thumbs.viddler.com/thumbnail_1_4ab110cc_v1.jpg&quot; width=&quot;114&quot; height=&quot;86&quot; alt=&quot;Video Brain Teaser #49&quot; border=&quot;0&quot; /&gt;&lt;/a&gt;&lt;/p&gt;&#xD;
&#xD;
Videos that provide viewers with brain teasers/mental puzzles. These may consist of problems dealing with the arrangement of matchsticks, coins, and other items. May include pencil drawing games, optical illusions, hidden images and "Find the Twin" problems.&lt;p&gt; By &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/&quot; &gt;videomathtutor&lt;/a&gt;&lt;/p&gt;&#xD;
&#xD;
&lt;p&gt; Tags : &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/Game&quot;&gt;Game&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/brain&quot;&gt;brain&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/challenge&quot;&gt;challenge&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/find&quot;&gt;find&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/fun&quot;&gt;fun&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/game.&quot;&gt;game.&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/hidden&quot;&gt;hidden&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/illusion&quot;&gt;illusion&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/image&quot;&gt;image&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/math&quot;&gt;math&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/optical&quot;&gt;optical&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/puzzle&quot;&gt;puzzle&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/riddle&quot;&gt;riddle&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/teaser&quot;&gt;teaser&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/twin&quot;&gt;twin&lt;/a&gt;&lt;/p&gt;</description>
      <enclosure url="http://www.viddler.com/player/4ab110cc/" length="49" type="application/x-shockwave-flash" />
      <pubDate>Fri, 04 Dec 2009 01:01:02 GMT</pubDate>
      <guid>http://www.viddler.com/explore/videomathtutor/videos/101/</guid>
      <media:content url="http://www.viddler.com/explore/videomathtutor/videos/101/">
        <media:player url="http://www.viddler.com/explore/videomathtutor/videos/101/" />
        <media:category label="Tags">Game brain challenge find fun game. hidden illusion image math optical puzzle riddle teaser twin</media:category>
        <media:credit role="author" scheme="urn:ebu">videomathtutor</media:credit>
        <media:thumbnail url="http://cdn-thumbs.viddler.com/thumbnail_1_4ab110cc_v1.jpg" width="114" height="84" />
        <media:title>Video Brain Teaser #49</media:title>
      </media:content>
    </item>
    <item>
      <title>Video Brain Teaser #48</title>
      <link>http://www.viddler.com/explore/videomathtutor/videos/100/</link>
      <description>&lt;p&gt;&lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/videos/100/&quot; title=&quot;Video Brain Teaser #48&quot; &gt;&lt;img src=&quot;http://cdn-thumbs.viddler.com/thumbnail_1_1fef99ab_v2.jpg&quot; width=&quot;114&quot; height=&quot;86&quot; alt=&quot;Video Brain Teaser #48&quot; border=&quot;0&quot; /&gt;&lt;/a&gt;&lt;/p&gt;&#xD;
&#xD;
Videos that provide viewers with brain teasers/mental puzzles. These may consist of problems dealing with the arrangement of matchsticks, coins, and other items. May include pencil drawing games, optical illusions, hidden images and "Find the Twin" problems.&lt;p&gt; By &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/&quot; &gt;videomathtutor&lt;/a&gt;&lt;/p&gt;&#xD;
&#xD;
&lt;p&gt; Tags : &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/Game&quot;&gt;Game&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/brain&quot;&gt;brain&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/challenge&quot;&gt;challenge&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/find&quot;&gt;find&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/fun&quot;&gt;fun&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/game.&quot;&gt;game.&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/hidden&quot;&gt;hidden&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/illusion&quot;&gt;illusion&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/image&quot;&gt;image&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/math&quot;&gt;math&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/optical&quot;&gt;optical&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/puzzle&quot;&gt;puzzle&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/riddle&quot;&gt;riddle&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/teaser&quot;&gt;teaser&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/twin&quot;&gt;twin&lt;/a&gt;&lt;/p&gt;</description>
      <enclosure url="http://www.viddler.com/player/1fef99ab/" length="49" type="application/x-shockwave-flash" />
      <pubDate>Fri, 04 Dec 2009 01:00:05 GMT</pubDate>
      <guid>http://www.viddler.com/explore/videomathtutor/videos/100/</guid>
      <media:content url="http://www.viddler.com/explore/videomathtutor/videos/100/">
        <media:player url="http://www.viddler.com/explore/videomathtutor/videos/100/" />
        <media:category label="Tags">Game brain challenge find fun game. hidden illusion image math optical puzzle riddle teaser twin</media:category>
        <media:credit role="author" scheme="urn:ebu">videomathtutor</media:credit>
        <media:thumbnail url="http://cdn-thumbs.viddler.com/thumbnail_1_1fef99ab_v2.jpg" width="114" height="84" />
        <media:title>Video Brain Teaser #48</media:title>
      </media:content>
    </item>
    <item>
      <title>Video Brain Teaser #47</title>
      <link>http://www.viddler.com/explore/videomathtutor/videos/99/</link>
      <description>&lt;p&gt;&lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/videos/99/&quot; title=&quot;Video Brain Teaser #47&quot; &gt;&lt;img src=&quot;http://cdn-thumbs.viddler.com/thumbnail_1_5389bae7_v1.jpg&quot; width=&quot;114&quot; height=&quot;86&quot; alt=&quot;Video Brain Teaser #47&quot; border=&quot;0&quot; /&gt;&lt;/a&gt;&lt;/p&gt;&#xD;
&#xD;
Videos that provide viewers with brain teasers/mental puzzles. These may consist of problems dealing with the arrangement of matchsticks, coins, and other items. May include pencil drawing games, optical illusions, hidden images and "Find the Twin" problems.&lt;p&gt; By &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/&quot; &gt;videomathtutor&lt;/a&gt;&lt;/p&gt;&#xD;
&#xD;
&lt;p&gt; Tags : &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/Game&quot;&gt;Game&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/brain&quot;&gt;brain&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/challenge&quot;&gt;challenge&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/find&quot;&gt;find&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/fun&quot;&gt;fun&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/game.&quot;&gt;game.&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/hidden&quot;&gt;hidden&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/illusion&quot;&gt;illusion&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/image&quot;&gt;image&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/math&quot;&gt;math&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/optical&quot;&gt;optical&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/puzzle&quot;&gt;puzzle&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/riddle&quot;&gt;riddle&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/teaser&quot;&gt;teaser&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/twin&quot;&gt;twin&lt;/a&gt;&lt;/p&gt;</description>
      <enclosure url="http://www.viddler.com/player/5389bae7/" length="49" type="application/x-shockwave-flash" />
      <pubDate>Fri, 04 Dec 2009 01:00:03 GMT</pubDate>
      <guid>http://www.viddler.com/explore/videomathtutor/videos/99/</guid>
      <media:content url="http://www.viddler.com/explore/videomathtutor/videos/99/">
        <media:player url="http://www.viddler.com/explore/videomathtutor/videos/99/" />
        <media:category label="Tags">Game brain challenge find fun game. hidden illusion image math optical puzzle riddle teaser twin</media:category>
        <media:credit role="author" scheme="urn:ebu">videomathtutor</media:credit>
        <media:thumbnail url="http://cdn-thumbs.viddler.com/thumbnail_1_5389bae7_v1.jpg" width="114" height="84" />
        <media:title>Video Brain Teaser #47</media:title>
      </media:content>
    </item>
    <item>
      <title>Video Brain Teaser #46</title>
      <link>http://www.viddler.com/explore/videomathtutor/videos/98/</link>
      <description>&lt;p&gt;&lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/videos/98/&quot; title=&quot;Video Brain Teaser #46&quot; &gt;&lt;img src=&quot;http://cdn-thumbs.viddler.com/thumbnail_1_3b4bbdca_v1.jpg&quot; width=&quot;114&quot; height=&quot;86&quot; alt=&quot;Video Brain Teaser #46&quot; border=&quot;0&quot; /&gt;&lt;/a&gt;&lt;/p&gt;&#xD;
&#xD;
Videos that provide viewers with brain teasers/mental puzzles. These may consist of problems dealing with the arrangement of matchsticks, coins, and other items. May include pencil drawing games, optical illusions, hidden images and "Find the Twin" problems.&lt;p&gt; By &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/&quot; &gt;videomathtutor&lt;/a&gt;&lt;/p&gt;&#xD;
&#xD;
&lt;p&gt; Tags : &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/Game&quot;&gt;Game&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/brain&quot;&gt;brain&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/challenge&quot;&gt;challenge&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/find&quot;&gt;find&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/fun&quot;&gt;fun&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/game.&quot;&gt;game.&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/hidden&quot;&gt;hidden&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/illusion&quot;&gt;illusion&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/image&quot;&gt;image&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/math&quot;&gt;math&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/optical&quot;&gt;optical&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/puzzle&quot;&gt;puzzle&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/riddle&quot;&gt;riddle&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/teaser&quot;&gt;teaser&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/twin&quot;&gt;twin&lt;/a&gt;&lt;/p&gt;</description>
      <enclosure url="http://www.viddler.com/player/3b4bbdca/" length="49" type="application/x-shockwave-flash" />
      <pubDate>Fri, 04 Dec 2009 01:00:03 GMT</pubDate>
      <guid>http://www.viddler.com/explore/videomathtutor/videos/98/</guid>
      <media:content url="http://www.viddler.com/explore/videomathtutor/videos/98/">
        <media:player url="http://www.viddler.com/explore/videomathtutor/videos/98/" />
        <media:category label="Tags">Game brain challenge find fun game. hidden illusion image math optical puzzle riddle teaser twin</media:category>
        <media:credit role="author" scheme="urn:ebu">videomathtutor</media:credit>
        <media:thumbnail url="http://cdn-thumbs.viddler.com/thumbnail_1_3b4bbdca_v1.jpg" width="114" height="84" />
        <media:title>Video Brain Teaser #46</media:title>
      </media:content>
    </item>
    <item>
      <title>Video Brain Teaser #45</title>
      <link>http://www.viddler.com/explore/videomathtutor/videos/97/</link>
      <description>&lt;p&gt;&lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/videos/97/&quot; title=&quot;Video Brain Teaser #45&quot; &gt;&lt;img src=&quot;http://cdn-thumbs.viddler.com/thumbnail_1_89751061_v1.jpg&quot; width=&quot;114&quot; height=&quot;86&quot; alt=&quot;Video Brain Teaser #45&quot; border=&quot;0&quot; /&gt;&lt;/a&gt;&lt;/p&gt;&#xD;
&#xD;
Videos that provide viewers with brain teasers/mental puzzles. These may consist of problems dealing with the arrangement of matchsticks, coins, and other items. May include pencil drawing games, optical illusions, hidden images and "Find the Twin" problems.&lt;p&gt; By &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/&quot; &gt;videomathtutor&lt;/a&gt;&lt;/p&gt;&#xD;
&#xD;
&lt;p&gt; Tags : &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/Game&quot;&gt;Game&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/brain&quot;&gt;brain&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/challenge&quot;&gt;challenge&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/find&quot;&gt;find&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/fun&quot;&gt;fun&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/game.&quot;&gt;game.&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/hidden&quot;&gt;hidden&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/illusion&quot;&gt;illusion&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/image&quot;&gt;image&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/math&quot;&gt;math&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/optical&quot;&gt;optical&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/puzzle&quot;&gt;puzzle&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/riddle&quot;&gt;riddle&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/teaser&quot;&gt;teaser&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/twin&quot;&gt;twin&lt;/a&gt;&lt;/p&gt;</description>
      <enclosure url="http://www.viddler.com/player/89751061/" length="49" type="application/x-shockwave-flash" />
      <pubDate>Fri, 04 Dec 2009 01:01:08 GMT</pubDate>
      <guid>http://www.viddler.com/explore/videomathtutor/videos/97/</guid>
      <media:content url="http://www.viddler.com/explore/videomathtutor/videos/97/">
        <media:player url="http://www.viddler.com/explore/videomathtutor/videos/97/" />
        <media:category label="Tags">Game brain challenge find fun game. hidden illusion image math optical puzzle riddle teaser twin</media:category>
        <media:credit role="author" scheme="urn:ebu">videomathtutor</media:credit>
        <media:thumbnail url="http://cdn-thumbs.viddler.com/thumbnail_1_89751061_v1.jpg" width="114" height="84" />
        <media:title>Video Brain Teaser #45</media:title>
      </media:content>
    </item>
    <item>
      <title>Video Brain Teaser #44</title>
      <link>http://www.viddler.com/explore/videomathtutor/videos/96/</link>
      <description>&lt;p&gt;&lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/videos/96/&quot; title=&quot;Video Brain Teaser #44&quot; &gt;&lt;img src=&quot;http://cdn-thumbs.viddler.com/thumbnail_1_3e9579e7_v1.jpg&quot; width=&quot;114&quot; height=&quot;86&quot; alt=&quot;Video Brain Teaser #44&quot; border=&quot;0&quot; /&gt;&lt;/a&gt;&lt;/p&gt;&#xD;
&#xD;
Videos that provide viewers with brain teasers/mental puzzles. These may consist of problems dealing with the arrangement of matchsticks, coins, and other items. May include pencil drawing games, optical illusions, hidden images and "Find the Twin" problems.&lt;p&gt; By &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/&quot; &gt;videomathtutor&lt;/a&gt;&lt;/p&gt;&#xD;
&#xD;
&lt;p&gt; Tags : &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/Game&quot;&gt;Game&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/brain&quot;&gt;brain&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/challenge&quot;&gt;challenge&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/find&quot;&gt;find&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/fun&quot;&gt;fun&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/game.&quot;&gt;game.&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/hidden&quot;&gt;hidden&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/illusion&quot;&gt;illusion&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/image&quot;&gt;image&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/math&quot;&gt;math&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/optical&quot;&gt;optical&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/puzzle&quot;&gt;puzzle&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/riddle&quot;&gt;riddle&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/teaser&quot;&gt;teaser&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/twin&quot;&gt;twin&lt;/a&gt;&lt;/p&gt;</description>
      <enclosure url="http://www.viddler.com/player/3e9579e7/" length="49" type="application/x-shockwave-flash" />
      <pubDate>Fri, 04 Dec 2009 00:59:04 GMT</pubDate>
      <guid>http://www.viddler.com/explore/videomathtutor/videos/96/</guid>
      <media:content url="http://www.viddler.com/explore/videomathtutor/videos/96/">
        <media:player url="http://www.viddler.com/explore/videomathtutor/videos/96/" />
        <media:category label="Tags">Game brain challenge find fun game. hidden illusion image math optical puzzle riddle teaser twin</media:category>
        <media:credit role="author" scheme="urn:ebu">videomathtutor</media:credit>
        <media:thumbnail url="http://cdn-thumbs.viddler.com/thumbnail_1_3e9579e7_v1.jpg" width="114" height="84" />
        <media:title>Video Brain Teaser #44</media:title>
      </media:content>
    </item>
    <item>
      <title>Video Brain Teaser #43</title>
      <link>http://www.viddler.com/explore/videomathtutor/videos/95/</link>
      <description>&lt;p&gt;&lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/videos/95/&quot; title=&quot;Video Brain Teaser #43&quot; &gt;&lt;img src=&quot;http://cdn-thumbs.viddler.com/thumbnail_1_cc692952_v1.jpg&quot; width=&quot;114&quot; height=&quot;86&quot; alt=&quot;Video Brain Teaser #43&quot; border=&quot;0&quot; /&gt;&lt;/a&gt;&lt;/p&gt;&#xD;
&#xD;
Videos that provide viewers with brain teasers/mental puzzles. These may consist of problems dealing with the arrangement of matchsticks, coins, and other items. May include pencil drawing games, optical illusions, hidden images and "Find the Twin" problems.&lt;p&gt; By &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/&quot; &gt;videomathtutor&lt;/a&gt;&lt;/p&gt;&#xD;
&#xD;
&lt;p&gt; Tags : &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/Game&quot;&gt;Game&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/brain&quot;&gt;brain&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/challenge&quot;&gt;challenge&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/find&quot;&gt;find&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/fun&quot;&gt;fun&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/game.&quot;&gt;game.&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/hidden&quot;&gt;hidden&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/illusion&quot;&gt;illusion&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/image&quot;&gt;image&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/math&quot;&gt;math&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/optical&quot;&gt;optical&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/puzzle&quot;&gt;puzzle&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/riddle&quot;&gt;riddle&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/teaser&quot;&gt;teaser&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/twin&quot;&gt;twin&lt;/a&gt;&lt;/p&gt;</description>
      <enclosure url="http://www.viddler.com/player/cc692952/" length="49" type="application/x-shockwave-flash" />
      <pubDate>Fri, 04 Dec 2009 00:59:03 GMT</pubDate>
      <guid>http://www.viddler.com/explore/videomathtutor/videos/95/</guid>
      <media:content url="http://www.viddler.com/explore/videomathtutor/videos/95/">
        <media:player url="http://www.viddler.com/explore/videomathtutor/videos/95/" />
        <media:category label="Tags">Game brain challenge find fun game. hidden illusion image math optical puzzle riddle teaser twin</media:category>
        <media:credit role="author" scheme="urn:ebu">videomathtutor</media:credit>
        <media:thumbnail url="http://cdn-thumbs.viddler.com/thumbnail_1_cc692952_v1.jpg" width="114" height="84" />
        <media:title>Video Brain Teaser #43</media:title>
      </media:content>
    </item>
    <item>
      <title>Video Brain Teaser #42</title>
      <link>http://www.viddler.com/explore/videomathtutor/videos/94/</link>
      <description>&lt;p&gt;&lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/videos/94/&quot; title=&quot;Video Brain Teaser #42&quot; &gt;&lt;img src=&quot;http://cdn-thumbs.viddler.com/thumbnail_1_6cd6886e_v1.jpg&quot; width=&quot;114&quot; height=&quot;86&quot; alt=&quot;Video Brain Teaser #42&quot; border=&quot;0&quot; /&gt;&lt;/a&gt;&lt;/p&gt;&#xD;
&#xD;
Videos that provide viewers with brain teasers/mental puzzles. These may consist of problems dealing with the arrangement of matchsticks, coins, and other items. May include pencil drawing games, optical illusions, hidden images and "Find the Twin" problems.&lt;p&gt; By &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/&quot; &gt;videomathtutor&lt;/a&gt;&lt;/p&gt;&#xD;
&#xD;
&lt;p&gt; Tags : &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/Game&quot;&gt;Game&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/brain&quot;&gt;brain&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/challenge&quot;&gt;challenge&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/find&quot;&gt;find&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/fun&quot;&gt;fun&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/game.&quot;&gt;game.&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/hidden&quot;&gt;hidden&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/illusion&quot;&gt;illusion&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/image&quot;&gt;image&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/math&quot;&gt;math&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/optical&quot;&gt;optical&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/puzzle&quot;&gt;puzzle&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/riddle&quot;&gt;riddle&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/teaser&quot;&gt;teaser&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/twin&quot;&gt;twin&lt;/a&gt;&lt;/p&gt;</description>
      <enclosure url="http://www.viddler.com/player/6cd6886e/" length="50" type="application/x-shockwave-flash" />
      <pubDate>Fri, 04 Dec 2009 01:02:00 GMT</pubDate>
      <guid>http://www.viddler.com/explore/videomathtutor/videos/94/</guid>
      <media:content url="http://www.viddler.com/explore/videomathtutor/videos/94/">
        <media:player url="http://www.viddler.com/explore/videomathtutor/videos/94/" />
        <media:category label="Tags">Game brain challenge find fun game. hidden illusion image math optical puzzle riddle teaser twin</media:category>
        <media:credit role="author" scheme="urn:ebu">videomathtutor</media:credit>
        <media:thumbnail url="http://cdn-thumbs.viddler.com/thumbnail_1_6cd6886e_v1.jpg" width="114" height="84" />
        <media:title>Video Brain Teaser #42</media:title>
      </media:content>
    </item>
    <item>
      <title>Video Brain Teaser #41</title>
      <link>http://www.viddler.com/explore/videomathtutor/videos/93/</link>
      <description>&lt;p&gt;&lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/videos/93/&quot; title=&quot;Video Brain Teaser #41&quot; &gt;&lt;img src=&quot;http://cdn-thumbs.viddler.com/thumbnail_1_f0754690_v1.jpg&quot; width=&quot;114&quot; height=&quot;86&quot; alt=&quot;Video Brain Teaser #41&quot; border=&quot;0&quot; /&gt;&lt;/a&gt;&lt;/p&gt;&#xD;
&#xD;
Videos that provide viewers with brain teasers/mental puzzles. These may consist of problems dealing with the arrangement of matchsticks, coins, and other items. May include pencil drawing games, optical illusions, hidden images and "Find the Twin" problems.&lt;p&gt; By &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/&quot; &gt;videomathtutor&lt;/a&gt;&lt;/p&gt;&#xD;
&#xD;
&lt;p&gt; Tags : &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/Game&quot;&gt;Game&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/brain&quot;&gt;brain&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/challenge&quot;&gt;challenge&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/find&quot;&gt;find&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/fun&quot;&gt;fun&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/game.&quot;&gt;game.&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/hidden&quot;&gt;hidden&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/illusion&quot;&gt;illusion&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/image&quot;&gt;image&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/math&quot;&gt;math&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/optical&quot;&gt;optical&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/puzzle&quot;&gt;puzzle&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/riddle&quot;&gt;riddle&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/teaser&quot;&gt;teaser&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/twin&quot;&gt;twin&lt;/a&gt;&lt;/p&gt;</description>
      <enclosure url="http://www.viddler.com/player/f0754690/" length="49" type="application/x-shockwave-flash" />
      <pubDate>Fri, 04 Dec 2009 01:02:02 GMT</pubDate>
      <guid>http://www.viddler.com/explore/videomathtutor/videos/93/</guid>
      <media:content url="http://www.viddler.com/explore/videomathtutor/videos/93/">
        <media:player url="http://www.viddler.com/explore/videomathtutor/videos/93/" />
        <media:category label="Tags">Game brain challenge find fun game. hidden illusion image math optical puzzle riddle teaser twin</media:category>
        <media:credit role="author" scheme="urn:ebu">videomathtutor</media:credit>
        <media:thumbnail url="http://cdn-thumbs.viddler.com/thumbnail_1_f0754690_v1.jpg" width="114" height="84" />
        <media:title>Video Brain Teaser #41</media:title>
      </media:content>
    </item>
    <item>
      <title>Video Brain Teaser #40</title>
      <link>http://www.viddler.com/explore/videomathtutor/videos/92/</link>
      <description>&lt;p&gt;&lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/videos/92/&quot; title=&quot;Video Brain Teaser #40&quot; &gt;&lt;img src=&quot;http://cdn-thumbs.viddler.com/thumbnail_1_fb80d49e_v1.jpg&quot; width=&quot;114&quot; height=&quot;86&quot; alt=&quot;Video Brain Teaser #40&quot; border=&quot;0&quot; /&gt;&lt;/a&gt;&lt;/p&gt;&#xD;
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Videos that provide viewers with brain teasers/mental puzzles. These may consist of problems dealing with the arrangement of matchsticks, coins, and other items. May include pencil drawing games, optical illusions, hidden images and "Find the Twin" problems.&lt;p&gt; By &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/&quot; &gt;videomathtutor&lt;/a&gt;&lt;/p&gt;&#xD;
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&lt;p&gt; Tags : &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/Game&quot;&gt;Game&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/brain&quot;&gt;brain&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/challenge&quot;&gt;challenge&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/find&quot;&gt;find&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/fun&quot;&gt;fun&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/game.&quot;&gt;game.&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/hidden&quot;&gt;hidden&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/illusion&quot;&gt;illusion&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/image&quot;&gt;image&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/math&quot;&gt;math&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/optical&quot;&gt;optical&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/puzzle&quot;&gt;puzzle&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/riddle&quot;&gt;riddle&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/teaser&quot;&gt;teaser&lt;/a&gt;, &lt;a href=&quot;http://www.viddler.com/explore/videomathtutor/tags/twin&quot;&gt;twin&lt;/a&gt;&lt;/p&gt;</description>
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      <pubDate>Fri, 04 Dec 2009 00:58:04 GMT</pubDate>
      <guid>http://www.viddler.com/explore/videomathtutor/videos/92/</guid>
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        <media:category label="Tags">Game brain challenge find fun game. hidden illusion image math optical puzzle riddle teaser twin</media:category>
        <media:credit role="author" scheme="urn:ebu">videomathtutor</media:credit>
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        <media:title>Video Brain Teaser #40</media:title>
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