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12 coins, and one counterfeit.

  1. Dec 26, 2005 #1
    You have 12 coins. one of the coin is a counterfeit of some unkown weight. The rest of the coins have identical weight. Use three tries in a pan balance to identify the counterfeit.
     
  2. jcsd
  3. Dec 26, 2005 #2

    Lisa!

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