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Guess a number between 1 and 31 (powers of 2)
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One Simple Math Trick Will Correctly Guess Your Age!
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I Will Predict Your Number - Math Magic Trick - YouTube
Thanks To A Mathematical Trick, You Can Always 'Guess' What Random Number A Person Has Picked | Digg
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3 Ways to Do a Number Trick to Guess Someone's Age - wikiHow
Math Magic Trick — Games 4 Gains
Cool Math Tricks to Amaze Your Friends
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Math Magic Trick — Games 4 Gains | Math magic tricks, Math magic, Math tricks
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Binary magic card trick - Chalkdust
