I have no brother or sister — Aptitude Question
I have no brother or sister: Looking at a portrait, a man said, 'I have no brother or sister, but that man's father… Answer and worked solution on CodeKairo.
- Topic: Blood Relations
- Section: Logical Reasoning
- Difficulty: Hard
- Time target: 90 seconds
Question
Looking at a portrait, a man said, 'I have no brother or sister, but that man's father is my father's son.' Whose portrait is it?
Options
- His own
- His son's
- His father's
- His nephew's
Show the answer and the worked solution
Correct answer: B. His son's
Worked solution
- Having no brothers, 'my father's son' must be the speaker himself.
- So the man in the portrait has the speaker as his father.
- The portrait is of his son.
Answer: His son's.
The idea
Substitute the resolved phrase back into the sentence and read it plainly: 'that man's father is me'. The relation then falls out immediately.
Shortcut. With no siblings, 'my father's son' is the speaker, so the sentence reads 'that man's father is me' — the man is his son.
Common trap. "His own" — stopping once 'my father's son' resolves to the speaker and forgetting that the phrase describes the portrait man's father, not the man himself.