The counterfeit bag

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The counterfeit bag

6/21/25, 5:22 PM #1

Peter Martin
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Registered: 10/16/05
Location: Virginia USA
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You have 8 bags of gold coins, each with 100 coins. Seven bags contain genuine coins weighing 10 grams each, but one bag has counterfeit coins weighing 9 grams each. Using a digital scale only once, how can you identify the counterfeit bag?

Re: The counterfeit bag

6/21/25, 9:24 PM Solution #2

Jim DeLaney, Austintown, Ohio
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Registered: 12/6/04
Location: Austintown, Ohio

Put all eight bags on the scale - 7900 grams. Remove one bag at a time until the scale reads an even thousands. The last bag removed was the counterfeits.