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April 20, 2014

Homework Help: math

Posted by claudia on Sunday, January 22, 2012 at 2:26am.

In a group of 9 coins, one is fake and weighs slightly more. What is the fewest number
of times you need to use a pan balance to find the counterfeit coins? (A pan balance is
a scale used to measure weights, where weights are placed in two pans. The heaviest
pan will go down and the other up.)

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