You've got 27 coin, each of them is 10 g, except for 1. The 1 different coins has a masses different. It could be 9 g, or 11 g (heavier, or lighter by 1 g).

The question is, in how many minimum ways, you can determine the different coins, and is it heavier, or lighter?

You've got 27 coin, each of them is 10 g, except for 1. The 1 different coins has a masses different. It could be 9 g, or 11 g (heavier, or lighter by 1 g).

The question is, in how many minimum ways, you can determine the different coins, and is it heavier, or lighter?

I have no answer to this question.

Do you?

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