mehraboOon
07-17-2011, 07:18 PM
راز پنهان و جالب یک معادله ریاضی !+عکس
http://iranto.ca/Fa/images/stories/news8/very_interesting_puzzle_1.jpg
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http://iranto.ca/Fa/images/stories/news8/very_interesting_puzzle_2.jpg
http://iranto.ca/Fa/images/stories/news8/very_interesting_puzzle_1.jpg
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http://iranto.ca/Fa/images/stories/news8/very_interesting_puzzle_2.jpg