Free Blood Relations MCQs with Answers

11. A woman said, "That boy's mother is the only daughter of my mother." How is the boy related to her?

• A. Her son
• B. Her brother
• C. Her nephew
• D. Her cousin

Explanation: The only daughter of her mother is the speaker herself, so the boy's mother is the speaker and the boy is her son. As in the earlier question, only is the word that makes the identification certain. Failing to substitute leaves the puzzle unsolvable.

12. P is the husband of Q. R is the only son of P and Q. S is the wife of R. How is Q related to S?

• A. Mother
• B. Mother in law
• C. Sister in law
• D. Aunt

Explanation: R is Q's son, and S has married him, so Q is S's mother in law. Relationships created by marriage always carry the in law suffix. Q is the mother only of R, not of S.

13. A is B's brother. C is A's mother. D is C's father. E is D's mother. How is A related to D?

• A. Grandson
• B. Great grandson
• C. Son
• D. Nephew

Explanation: C is A's mother and D is C's father, so D is A's maternal grandfather and A is D's grandson. E, being D's mother, is A's great grandmother and is included only as a distractor. Counting the generational steps carefully is what separates grandson from great grandson.

14. In a family, the father of the bride is the brother of the groom's mother. The bride and groom are therefore

• A. siblings
• B. cousins
• C. unrelated
• D. uncle and niece

Explanation: The bride's father and the groom's mother are siblings, which makes their children first cousins. Cousin marriage is common in many Pakistani families, so this relationship appears frequently in such puzzles. Siblings would require the couple to share parents, which they do not.

15. If A + B means A is the father of B, and A - B means A is the wife of B, then what does P + Q - R mean?

• A. P is the father of Q and Q is the wife of R
• B. P is the wife of R
• C. R is the father of Q
• D. P and R are siblings

Explanation: The symbols are applied in order from left to right, so P plus Q gives the first relationship and Q minus R the second. Coded relation questions simply require substituting the definitions carefully. Inventing extra links beyond the symbols given is the usual error.

16. A man's sister's husband is his

• A. brother in law
• B. father in law
• C. son in law
• D. cousin

Explanation: A sibling's spouse is a brother in law or sister in law, and here the spouse is male. A father in law would be the father of one's own spouse, and a son in law the husband of one's daughter. Naming the connecting person before the relationship keeps these straight.

17. Pointing at a woman, a boy said, "Her only son is my father." How is the boy related to the woman?

• A. Her son
• B. Her brother
• C. Her nephew
• D. Her grandson

Explanation: The woman's son is the boy's father, so the woman is one generation above the father and two above the boy, making her his grandmother and him her grandson. Counting generations upward from the speaker is the quickest check. Her son being described as only rules out any uncle on that side.

18. X and Y are children of Z. Z is the son of W. How is W related to Y?

• A. Father
• B. Grandfather
• C. Uncle
• D. Brother

Explanation: Z sits one generation below W and one above Y, so W is Y's grandfather. The word son fixes Z as male but says nothing about Y's gender, which is not needed here. Counting the steps between generations gives the answer directly.

19. The daughter of my father's only brother is my

• A. sister
• B. cousin
• C. niece
• D. aunt

Explanation: The father's brother is the speaker's uncle, and an uncle's daughter is a cousin. A sister would be the daughter of the speaker's own father, and a niece the daughter of a sibling. Identifying the linking relative first, here the uncle, resolves the puzzle.

20. A is the mother of B and C. D is the husband of A. E is the son of C. How is D related to E?

• A. Father
• B. Grandfather
• C. Uncle
• D. Brother

Explanation: C is D's child, and E is C's son, so D is E's grandfather. The relationship runs down two generations from D to E. B is included only to add noise, since B plays no part in the chain.