Question #36921
40 people are sitting around a table. Everyone noticed that one of the people sitting
beside him is wearing a dress of the same colour as him, but the other one was wearing a
dress of different colour. What is the number of different dress colours of those people?
beside him is wearing a dress of the same colour as him, but the other one was wearing a
dress of different colour. What is the number of different dress colours of those people?
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