MathDB

Three wise men live in an old region. As they do not always agree on their advice to the king, he decided to stay with the wisest of the three, killing the others. To decide which of them was saved, performed the following test: He put each sage a hat, without him seeing its color, then locked them in a common room and told them:

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Only the first to guess the color of his own hat will save his life.

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In total there are five hats, three are white and two are black.

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You cannot communicate with each other, but you can look at each other. After a long time, one of the wise men says: "I know the color of my hat." What color did they have? How did you figure it out? What color were the other hats used?

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Problems(1)