His mother is my mother's only daughter — Aptitude Question
His mother is my mother's only daughter: Pointing to a man, a woman said, 'His mother is the only daughter of my… Answer and worked solution on CodeKairo.
- Topic: Blood Relations
- Section: Logical Reasoning
- Difficulty: Medium
- Time target: 60 seconds
Question
Pointing to a man, a woman said, 'His mother is the only daughter of my mother.' How is the woman related to the man?
Options
- Sister
- Aunt
- Mother
- Grandmother
Show the answer and the worked solution
Correct answer: C. Mother
Worked solution
- 'The only daughter of my mother' is the speaker herself.
- So the man's mother is the woman.
- She is his mother.
Answer: Mother.
The idea
Resolve the innermost phrase first and replace it with one person. The word 'only' is what forces it back onto the speaker.
Shortcut. A woman speaking of 'the only daughter of my mother' means herself, so the sentence collapses to 'his mother is me' — mother, with no chain to draw.
Common trap. "Aunt" — reading 'the only daughter of my mother' as the speaker's sister, which makes the man her sister's son; the word 'only' leaves no room for a sister.