M, N, O and P — Blood Relations Aptitude Question
M, N, O and P: M is the sister of N, N is the brother of O, and O is the daughter of P. How is M related to P? Answer and worked solution on CodeKairo.
- Topic: Blood Relations
- Section: Logical Reasoning
- Difficulty: Easy
- Time target: 60 seconds
Question
M is the sister of N, N is the brother of O, and O is the daughter of P. How is M related to P?
Options
- Son
- Daughter
- Sister
- Mother
Show the answer and the worked solution
Correct answer: B. Daughter
Worked solution
- M, N and O are siblings.
- O is P's daughter, so P is their parent.
- M is female (she is a sister), so M is P's daughter.
Answer: Daughter.
The idea
Chain the sibling links first, then attach the parent. The sex of the person asked about decides between son and daughter.
Shortcut. Siblings share a parent, and 'sister' fixes M as female, so M is P's daughter — the sexes of N and O never matter.
Common trap. "Sister" — copying 'M is the sister of N' and giving M's relation to her sibling instead of to the parent P.