My mother's brother's daughter again — Aptitude Question
My mother's brother's daughter again: Pointing to a woman, a man said, 'She is the daughter of my mother's only… Answer and worked solution on CodeKairo.
- Topic: Blood Relations
- Section: Logical Reasoning
- Difficulty: Easy
- Time target: 50 seconds
Question
Pointing to a woman, a man said, 'She is the daughter of my mother's only brother.' How is the man related to the woman?
Options
- Brother
- Cousin
- Uncle
- Nephew
Show the answer and the worked solution
Correct answer: B. Cousin
Worked solution
- His mother's brother is his maternal uncle.
- That uncle's daughter is his cousin.
- Cousinhood runs both ways, so the man is her cousin.
Answer: Cousin.
The idea
Cousin is a symmetric relation, unlike uncle or niece. Check whether the relation the question asks for needs reversing.
Shortcut. She is the daughter of his mother's brother — his maternal uncle's child — and cousin works both ways, so he is her cousin.
Common trap. "Nephew" — dropping 'daughter of' and treating the woman as the mother's sibling herself; he would then be her nephew.