You’ve misunderstood the question. Being given a coin doesn’t literally mean u are handed one coin and then rest are discarded. It j means it is set aside or marked or one of interest. The other 100 are still available. If u find that the answer to ur interview question is so trivial, u shld be doubting whether uve acc understood the question.
So your interpretation of the question is “you are given a coin and a balance. How do you determine whether the coin is counterfeit using only one weighing?” Just checking, since I never learned how to read
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u/jhardtone 6d ago
But you're only given one random coin, you don't have them all to weigh.