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  • good math mind bender counterfeit coin
    Math Mind Bender Puzzle: Which coin is the countefeit?
    9 comments »

    Here’s another good brain puzzle that’s been asked on job interviews:

    You have 8 coins, 1 of which is counterfeit and heavier than the others. You have a balance scale, which you may use twice. How will you figure out which coin is the counterfeit?

    Can post your answers to the comments section

    More »

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