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Question for my LJ friends

You have twelve coins. One of them is counterfeit, and is either too light or too heavy (you don't know which). You have a balance scale. How do you determine which coin is the counterfeit with only three weighings?

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subjectivity
Feb. 12th, 2007 07:15 pm (UTC)
that's a great idea... find the one by weighing in hands that feels lighter or heavier. Then you weigh that coin, and two other coins, to make sure that it's different from the rest. 3 weighings.
thisgirliknow
Feb. 12th, 2007 07:19 pm (UTC)
what if its a very small difference, unable to be detected by human hands? I mean, these are coins here.

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botticelli
thisgirliknow
Much like pineapples, I am hardcore.

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