How is P related to Q? Statement I: P is the son of Q's father's only son. Statement II: Q is the only daughter of her father, who has exactly two children. Which statement(s) is/are sufficient to answer?

Question

Accepted Answer

Both statements together are needed (neither alone is sufficient). Statement I alone is ambiguous because Q's gender is unknown (if Q were the only son, P would be Q's son). Statement II fixes Q as female with one brother, so 'Q's father's only son' is Q's brother and P is Q's nephew; both are needed.

How is P related to Q? Statement I: P is the son of Q's father's only son. Statement II: Q is the only daughter of her father, who has exactly two children. Which statement(s) is/are sufficient to answer?

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