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Next CSE-PPT: 14 March 2027

Family Relations Puzzles MCQs

Civil Service Exam Professional reviewer on family relationship puzzles: uncles, aunts, cousins, in-laws, grandparents and coded relationships, solved step by step with a simple family tree.

20 MCQsUpdated 3 November 2026

Family relationship puzzles test logical reasoning: you are told how people are related and must work out an unstated relationship. Every puzzle here states relationships with words such as brother, sister, son and daughter, so you do not have to guess anyone's gender.

Draw a small family tree: put each generation on its own level, connect parents and children with vertical lines, and siblings and spouses with horizontal lines. Then trace the path from one person to the other.

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  1. 1

    Correct answer: D. Uncle

    Ben is the brother of Ana's mother, so he is Ana's maternal uncle. A sibling of either parent is an uncle (if male) or an aunt (if female).

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    easy
  2. 2

    Pointing to a boy, Rosa says, "He is the son of my father's only son." Rosa is a woman. How is the boy related to Rosa?

    Correct answer: D. Nephew

    Since Rosa is a woman, her father's only son is her brother. The boy is her brother's son, which makes him her nephew. Draw the tree to check.

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  3. 3

    Correct answer: D. Uncle

    Carlo is the brother of Elmer's mother, so he is Elmer's maternal uncle. Uncles on the mother's side are called maternal uncles, and those on the father's side are paternal uncles.

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    easy
  4. 4

    Lito says, "My mother's mother has only one daughter." Who is that daughter?

    Correct answer: A. Lito's mother

    Lito's mother is a daughter of his grandmother. If the grandmother has only one daughter, that daughter must be Lito's mother.

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    easy
  5. 5

    Mr. Cruz is the husband of Ms. Reyes. Ms. Reyes is the sister of Mr. Santos. How is Mr. Cruz related to Mr. Santos?

    Correct answer: A. Brother-in-law

    Mr. Cruz is married to Mr. Santos's sister, so he is Mr. Santos's brother-in-law. The husband of one's sister is a brother-in-law.

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    easy
  6. 6

    Correct answer: A. Grandfather

    Ramon is the father of Tessa's father, so he is her paternal grandfather. Ramon is two generations above Tessa, so he is a grandparent. A great-grandparent would be three generations above.

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    easy
  7. 7

    Correct answer: D. Grandmother

    Fe is the mother of Eva's father, which makes her Eva's paternal grandmother. (Fe is the mother of a son, so Fe is a woman.)

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    easy
  8. 8

    Correct answer: A. Nephew

    The son is the child of Pedro's brother-in-law (his wife's brother). A child of a brother-in-law or sister-in-law is commonly called a nephew or niece.

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  9. 9

    Correct answer: B. Cousin

    Joy's father's sister is Joy's aunt. The aunt's son is Joy's first cousin. Children of siblings are first cousins to each other, whichever side of the family they come from.

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    easy
  10. 10

    Correct answer: C. Mother

    Ana is a daughter of her own mother. If her mother has only one daughter, that daughter is Ana herself. So Ana is Ben's mother.

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  11. 11

    Introducing a woman, Lito says, "She is the wife of my mother's only son." Lito is a man. How is the woman related to Lito?

    Correct answer: D. Wife

    Lito is a man, so his mother's only son is Lito himself. The woman is therefore Lito's wife. Such puzzles test whether you notice that the speaker can be the person described.

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  12. 12

    Mr. Lim is the father of Ella. Ella is the sister of Frank. Frank is the brother of Gina. How is Mr. Lim related to Gina?

    Correct answer: B. Father

    Ella, Frank and Gina are siblings, children of the same parents. Since Mr. Lim is Ella's father, he is also Gina's father.

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    easy
  13. 13

    Correct answer: A. Mother-in-law

    The mother of one's spouse is one's mother-in-law. Likewise, the father of one's spouse is one's father-in-law. In-law relationships are created by marriage, not by blood.

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    easy
  14. 14

    Correct answer: C. Mother-in-law

    Tess is the mother of her son-in-law's wife, so she is his mother-in-law. From Tess's side, her daughter's husband is her son-in-law.

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    easy
  15. 15

    In a code, "P + Q" means P is the father of Q, "P − Q" means P is the sister of Q, and "P × Q" means P is the brother of Q. What does "A + B − C" mean?

    Correct answer: B. A is the father of C.

    "A + B" means A is the father of B, and "B − C" means B is the sister of C. B and C are siblings, so A is the father of C as well.

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  16. 16

    Using the same code ("P + Q": P is the father of Q; "P − Q": P is the sister of Q; "P × Q": P is the brother of Q), what does "X − Y × Z" mean?

    Correct answer: C. X is the sister of Z.

    "X − Y" means X is the sister of Y, and "Y × Z" means Y is the brother of Z. So X, Y and Z are siblings, and X, being a sister, is the sister of Z.

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  17. 17

    Correct answer: B. Aunt

    Your father's brother is your uncle, and your uncle's wife is your aunt (an aunt by marriage). She is related to you by marriage, not by blood, unlike your father's sister.

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    easy
  18. 18

    Correct answer: B. Grandson

    The son is the child of Mr. Bautista's daughter, so he is Mr. Bautista's grandson. The son of one's son is also a grandson; the side of the family does not change the term.

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    easy
  19. 19

    Nilo is the only son of Mr. and Mrs. Garcia. Lea is Nilo's wife, and Rico is Lea's son with Nilo. How is Mrs. Garcia related to Rico?

    Correct answer: C. Grandmother

    Mrs. Garcia is Nilo's mother, and Nilo is Rico's father. So Mrs. Garcia is Rico's paternal grandmother. Lea's parents would be Rico's maternal grandparents.

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    easy
  20. 20

    Correct answer: C. Sister-in-law

    Vina is the sister of Tom's wife, which makes her Tom's sister-in-law. Sara is mentioned only as extra information. Extra names are often included to distract; focus only on the path between the two people asked about.

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