Blood Relations Quiz: Reasoning Practice

Spoilers! These are the Starter quiz’s answers. Easy, Medium, Hard and Mixed rounds show their own answers when you finish.

1. Pointing to a man, Ritu said, 'He is the son of the only son of my paternal grandfather.' How is the man related to Ritu?

   • Cousin
   • Brother
   • Uncle
   • Nephew

   Answer: Brother. The only son of Ritu's paternal grandfather is her father. The son of her father is her brother.

2. Introducing a woman, Arjun said, 'Her mother is the only daughter of my mother.' How is the woman related to Arjun?

   • Sister
   • Cousin
   • Niece
   • Daughter

   Answer: Niece. The only daughter of Arjun's mother is Arjun's sister. The woman is his sister's daughter, i.e. his niece.

3. A + B means A is the father of B; A - B means A is the wife of B; A × B means A is the brother of B; A ÷ B means A is the daughter of B. If P - Q + R × S, how is P related to S?

   • Mother
   • Sister
   • Aunt
   • Grandmother

   Answer: Mother. P is the wife of Q, Q is the father of R, and R is the brother of S. So Q is S's father, and P, his wife, is S's mother.

4. A + B means A is the father of B; A - B means A is the wife of B; A × B means A is the brother of B; A ÷ B means A is the daughter of B. If M × N ÷ O - K, how is K related to M?

   • Uncle
   • Grandfather
   • Brother
   • Father

   Answer: Father. M is the brother of N, N is the daughter of O, and O is the wife of K. So K is N's father, and therefore M's father too.

5. P is the brother of Q. R is the mother of Q. S is the father of R. T is the mother of S. How is P related to T?

   • Grandson
   • Great-grandson
   • Son
   • Nephew

   Answer: Great-grandson. R is the mother of both P and Q, S is their maternal grandfather and T is S's mother — their great-grandmother. P is male (a brother), so he is T's great-grandson.

6. A woman said to a man, 'Your mother's husband's only daughter is my mother.' How is the man related to the woman?

   • Brother
   • Father
   • Maternal uncle
   • Cousin

   Answer: Maternal uncle. The man's mother's husband is his father, and that man's only daughter is the man's sister. She is the woman's mother, so the man is her mother's brother — her maternal uncle.

7. A @ B means A is the son of B; A # B means A is the sister of B; A $ B means A is the husband of B; A % B means A is the mother of B. Which expression means that M is the grandmother of N?

   • M % P # N
   • N @ P @ Q $ M
   • N # P @ M
   • M # P % N

   Answer: N @ P @ Q $ M. N is the son of P, P is the son of Q, and Q is the husband of M — so M is P's mother and N's grandmother. The first and third make M the mother of N; the fourth makes her N's aunt.

8. Mohan is married to the only sister of Kiran's father. Ajay is the only son of Mohan and his wife. How is Ajay related to Kiran?

   • Cousin
   • Brother
   • Nephew
   • Uncle

   Answer: Cousin. Ajay's mother is the sister of Kiran's father, i.e. Kiran's paternal aunt. The child of one's aunt is one's cousin.

9. A is the brother of B. B is the sister of C. C is the son of D. How is D related to A?

   • Father
   • Mother
   • Uncle
   • Cannot be determined

   Answer: Cannot be determined. A, B and C are siblings, so D is A's parent. Nothing tells us D's gender, so we cannot say whether D is the father or the mother.

10. In a family of seven — J, K, L, M, N, O and P — there are three generations and two married couples. L is the father of N and the grandfather of P. J is the daughter-in-law of K. M is the sister of N. O is the son of J. How is O related to M?

    • Son
    • Brother
    • Nephew
    • Cousin

    Answer: Nephew. L is in the oldest generation and N in the middle one. J, K's daughter-in-law, must be married to K's son in the middle generation — M is a sister and J is the daughter-in-law herself, so K's son can only be N. So O is N's son, and M, N's sister, is his aunt: O is M's nephew.