My successor's father is my father's son. Who is my successor?
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Myself
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Nephew
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Daughter
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Niece
If my successor's father is my father's son, then my successor is my child (since my father's son could be me or my brother, but if it's my child's father, it must be my child). Since the successor is referred to as 'my successor' and the correct answer is Daughter, this implies the speaker is female and her successor is her daughter. Myself would make 'my successor's father' my father's son's father = my father, which doesn't work. Niece and Niece don't fit the relationship.
This is a classic logic riddle. The key insight: "my father's son," assuming the speaker has no brothers, refers to the speaker themself (since the speaker is their father's child, and if there's no other son, that son is the speaker). So the statement "my successor's father is my father's son" simplifies to "my successor's father is me" — meaning the successor is the speaker's own child. Among the given options — Myself, Nephew, Daughter, Niece — only "Daughter" represents the speaker's own child (with "Son" apparently not offered as an option), making it the best fit despite the riddle's phrasing not explicitly specifying gender. "Nephew" and "Niece" would require siblings, and "Myself" doesn't satisfy being one's own successor.