D and A — Blood Relations Aptitude Question
D and A: A is B's daughter, B is C's mother and D is C's brother. How is D related to A? Answer and worked solution on CodeKairo.
- Topic: Blood Relations
- Section: Logical Reasoning
- Difficulty: Medium
- Time target: 75 seconds
Question
A is B's daughter, B is C's mother and D is C's brother. How is D related to A?
Options
- Father
- Brother
- Uncle
- Son
Show the answer and the worked solution
Correct answer: B. Brother
Worked solution
- A is B's daughter and C is B's child, so A and C are siblings.
- D is C's brother, so D is also B's child.
- D is A's brother.
Answer: Brother.
The idea
Everyone traced back to the same parent is a sibling. Watch for the trap of reading D as belonging to a different generation.
Shortcut. A and C are both B's children, and D is C's brother, so all three are siblings — D is A's brother.
Common trap. "Uncle" — taking C for B's sibling rather than her child, which lifts D one generation above A.