A man looks at a photograph in his wallet and says, 'Brothers and sisters have I none, but that man's father is my father's son.' Who is the person in the photograph?
His son.
'My father's son' with no brothers or sisters must be the man himself. Therefore, 'that man's father is myself,' making the person in the photograph his son.
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: Medium. More like this: Logic riddles with answers or try Einstein's Logic Grid for a different kind of puzzle.
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