Four sisters enter a completely empty room at the same time. Sister A plays chess alone. Sister B reads a book. Sister C sleeps in the corner. What is Sister D doing?
Playing chess with Sister A.
Chess requires two players. Since Sister A is playing chess in a room with only her sisters, Sister D must be her opponent.
About this riddle
Logic riddles give you a few facts and ask what must be true. List what you know, cross out what cannot be, and see what is left.
Difficulty: Easy. More like this: Logic riddles with answers or try Einstein's Logic Grid for a different kind of puzzle.
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