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Actually, with the 12 coins you'd have to do it on each side of the balance. Since 23 are the same weight, and one isn't, the side with the lighter coin would raise up. Remove the 12 coins that you know now are of equal weight, and split the 12 coins and repeat until you have the lightest coin.
Actually, with the 12 coins you'd have to do it on each side of the balance. Since 23 are the same weight, and one isn't, the side with the lighter coin would raise up. Remove the 12 coins that you know now are of equal weight, and split the 12 coins and repeat until you have the lightest coin.