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Riddles, brain puzzles and mathematical problems
Oscar House Offline
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RE: Riddles, brain puzzles and mathematical problems

Make 3 piles of 9 coins each. Compare two of them and you'll know which of the piles contains the lighter coin. Divide that pile into 3 piles of 3 coins, then compare two of those. Now you'll know which of the 3-coin piles contains the lighter coin. Now just weigh two of the remaining coins and you'll find the right coin.

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04-09-2014, 09:40 PM
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RE: Riddles, brain puzzles and mathematical problems - by Oscar House - 04-09-2014, 09:40 PM



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