That man's son — Blood Relations Aptitude Question
That man's son: A woman said, 'The son of that man is my father's son's son.' How is the man related to the woman? Answer and worked solution on CodeKairo.
- Topic: Blood Relations
- Section: Logical Reasoning
- Difficulty: Hard
- Time target: 120 seconds
Question
A woman said, 'The son of that man is my father's son's son.' How is the man related to the woman?
Options
- Father
- Brother
- Uncle
- Cousin
Show the answer and the worked solution
Correct answer: B. Brother
Worked solution
- 'My father's son' is the woman's brother.
- So her father's son's son is her brother's son, that is her nephew.
- The man's son is that nephew, so the man is the woman's brother.
Answer: Brother.
The idea
Resolve from the inside out, and use the speaker's sex: a woman cannot be her father's son, so the phrase must mean her brother.
Shortcut. Strip the matching tail: 'son of that man' = 'son of my father's son', so that man = 'my father's son', which for a woman is her brother.
Common trap. "Father" — dropping the final 'son', so the man's son becomes her father's son (her brother) and the man looks like her father.