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Puzzle - Hint

You have a pile of 24 coins. Twenty-three of these coins have the same weight, and one is heavier.

Your task is to determine which coin is heavier and do so in the minimum number of weighings.

You are given a beam balance (scale), which will compare the weight of any two sets of coins out of the total set of 24 coins.

How many weighings are required to identify the heavier coin?

 [Ref: ZYUQ]

Hint: Split the coins into groups of 8 for the first weighing.

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[Added July 2010]

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