# The counterfeit coins?

You have 10 stacks of coins and each stack contains 10 coins. One complete stack of coins is counterfeit. You know the weight of each genuine coin and you know that the weight of each counterfeit coin is 1 gram heavier or lighter than a genuine coin.

Using a pointer scale ie one that gives an actual reading (not a balance), what is the minimum amount of weighings you would need to do to determine which stack is counterfeit?

You can split the stacks up if you want when weighing them.

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