You have 8 Sholay coins which are all the same weight, except for one which is slightly heavier than the others (you don’t know which coin is heavier). You also have an old‐style balance, which allows you to weigh two piles of coins to see which one is heavier (or if they are of equal weight). What is the fewest number of weighings that you can make which will tell you which coin is the heavier one?
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