The Counterfeit Coin
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|Ivars Peterson (MathTrek)|
|The classic puzzle of the counterfeit coin has long served as a stiff test of one's reasoning power and ingenuity. In its standard form, the problem concerns 12 coins identical in size, shape, and appearance. One coin, however, is counterfeit, having a slightly different weight than the other 11 coins. Using only a two-pan balance, what is the smallest number of weighings that would guarantee that you would find the counterfeit coin?|
|Levels:||Middle School (6-8), High School (9-12), College|
|Resource Types:||Problems/Puzzles, Articles|
|Math Topics:||Algorithms, Logic/Foundations|
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