Paper 1 · Mathematical Reasoning and Aptitude
A has three children. B is the brother of C, and C is the sister of D. E, who is the wife of A, is the mother of D. There is only one daughter of the husband of E. What is the relation between D and B?
AB is the brother of D ✓ Correct
BB is not related to D
CD is the sister of B
DNone of the above
Correct answer: (A) B is the brother of D — B is the brother of D, so that is the answer.
Explanation
★B is the brother of D, so that is the answer.
★A and E are the parents, and A has three children, B, C and D.
★The husband of E, who is A, has only one daughter.
★C is called the sister of D, so C is that one daughter.
★Since C is the only daughter, both B and D are sons.
★So D is a son and B is a son, making B the brother of D.
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