SSC CGL Tier 1 - Reasoning
Blood Relation
Practice MCQs with Detailed Solutions
Total Questions: 20 | Difficulty: Easy (7) - Medium (7) - Hard (6)
Sub-topics Covered: Simple Relations, Coded Relations, Pointing/Photograph
Based,
Family Tree Analysis, Mixed Blood Relations, Symbol-based Relations
Quick Tips for Blood Relation Questions:
- Always draw a family tree diagram for complex problems
- Remember: Paternal = Father's side, Maternal = Mother's side
- In coded relations, decode each symbol step by step
- Pay attention to gender-specific terms (son/daughter, brother/sister)
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SSC CGL Tier 1 - Reasoning: Blood Relation MCQs Page 1SSC CGL Tier 1 | Reasoning - Blood Relation
EASY LEVEL (Questions 1-7)
Q1. Pointing to a photograph, Rahul said, 'She is the daughter of my grandfather's only son.'
How is the person in the photograph related to Rahul?
(A) Mother
(B) Sister
(C) Aunt
(D) Cousin
Correct Answer: (B) Sister
Explanation:
Step 1: Rahul's grandfather's only son = Rahul's father.
Step 2: The daughter of Rahul's father = Rahul's sister.
Therefore, the person in the photograph is Rahul's Sister.
Q2. If A is the brother of B, B is the sister of C, and C is the father of D, how is A related to D?
(A) Grandfather
(B) Uncle
(C) Brother
(D) Father
Correct Answer: (B) Uncle
Explanation:
Step 1: C is the father of D, so D is the child of C.
Step 2: B is the sister of C, so B is D's aunt.
Step 3: A is the brother of B. Since B is C's sibling, A is also C's sibling.
Step 4: A, being C's brother, is D's Uncle.
Q3. Introducing a man, a woman said, 'His wife is the only daughter of my father.' How is that
man related to the woman?
(A) Brother
(B) Father-in-law
(C) Husband
(D) Uncle
Correct Answer: (C) Husband
Explanation:
Step 1: The only daughter of the woman's father = the woman herself.
Step 2: The man's wife is the woman herself.
Therefore, the man is the woman's Husband.
Q4. If Neha says, 'Anita's father Raman is the only son of my father-in-law Mahesh', then how
is Bindu, who is the sister of Anita, related to Mahesh?
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(A) Niece
(B) Daughter
(C) Granddaughter
(D) Daughter-in-law
Correct Answer: (C) Granddaughter
Explanation:
Step 1: Mahesh is Neha's father-in-law, so Neha's husband is Mahesh's son.
Step 2: Raman is Mahesh's only son, so Raman is Neha's husband.
Step 3: Anita is Raman's daughter, making Anita Mahesh's granddaughter.
Step 4: Bindu is Anita's sister, so Bindu is also Raman's daughter.
Therefore, Bindu is Mahesh's Granddaughter.
Q5. A woman introduces a man as the son of the brother of her mother. How is the man
related to the woman?
(A) Nephew
(B) Son
(C) Cousin
(D) Uncle
Correct Answer: (C) Cousin
Explanation:
Step 1: The brother of the woman's mother = the woman's maternal uncle.
Step 2: The son of the woman's maternal uncle = the woman's cousin.
Therefore, the man is the woman's Cousin.
Q6. Pointing to a boy, Meena said, 'He is the son of my mother's only child.' How is the boy
related to Meena?
(A) Brother
(B) Son
(C) Cousin
(D) Nephew
Correct Answer: (B) Son
Explanation:
Step 1: Meena's mother's only child = Meena herself.
Step 2: The son of Meena = Meena's son.
Therefore, the boy is Meena's Son.
Q7. If X is the brother of the son of Y's son, how is X related to Y?
(A) Son
(B) Brother
(C) Grandson
(D) Cousin
Correct Answer: (C) Grandson
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Explanation:
Step 1: Y's son = one generation below Y.
Step 2: Y's son's son = Y's grandson.
Step 3: The brother of Y's grandson = also Y's grandson (same generation).
Therefore, X is Y's Grandson.
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MEDIUM LEVEL (Questions 8-14)
Q8. A and B are married couple. X and Y are brothers. X is the brother of A. How is Y related
to B?
(A) Brother
(B) Brother-in-law
(C) Son-in-law
(D) Cousin
Correct Answer: (B) Brother-in-law
Explanation:
Step 1: X is A's brother, and X and Y are brothers.
Step 2: So Y is also A's brother.
Step 3: A and B are married.
Step 4: Y, being A's brother, is B's Brother-in-law.
Q9. Pointing to a man in a photograph, a woman said, 'His brother's father is the only son of
my grandfather.' How is the man related to the woman?
(A) Father
(B) Brother
(C) Uncle
(D) Grandfather
Correct Answer: (B) Brother
Explanation:
Step 1: The only son of the woman's grandfather = the woman's father.
Step 2: The man's brother's father = the woman's father.
Step 3: This means the man and his brother are children of the woman's father.
Therefore, the man is the woman's Brother.
Q10. In a family of six persons P, Q, R, S, T and U, there are two married couples. R is a
lawyer and father of S. U is grandfather of S and is a doctor. Q is grandmother of S and is a
housewife. T is granddaughter of Q and is an engineer. P is mother of T. How is P related to
U?
(A) Daughter
(B) Daughter-in-law
(C) Sister
(D) Mother
Correct Answer: (B) Daughter-in-law
Explanation:
Step 1: U is grandfather and Q is grandmother of S - they are married couple.
Step 2: R is father of S, so R is son of U and Q.
Step 3: T is granddaughter of Q, so T is child of R.
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Step 4: P is mother of T, so P is wife of R.
Step 5: Since R is son of U, P (R's wife) is U's Daughter-in-law.
Q11. If 'A + B' means 'A is the mother of B', 'A - B' means 'A is the brother of B', 'A x B'
means 'A is the father of B', and 'A / B' means 'A is the sister of B', which of the following
represents 'P is the maternal uncle of Q'?
(A) P - R + Q
(B) P - R x Q
(C) Q - R + P
(D) P x R + Q
Correct Answer: (A) P - R + Q
Explanation:
Step 1: Maternal uncle = mother's brother.
Step 2: For P to be maternal uncle of Q, P should be brother of Q's mother.
Step 3: P - R means P is brother of R.
Step 4: R + Q means R is mother of Q.
Step 5: So P - R + Q means P is brother of R, and R is mother of Q.
Therefore, P is maternal uncle of Q. Answer: P - R + Q
Q12. Looking at a portrait, Harsh said, 'The father of this person is the only brother of my
mother.' How is the person in the portrait related to Harsh?
(A) Brother
(B) Nephew
(C) Cousin
(D) Uncle
Correct Answer: (C) Cousin
Explanation:
Step 1: The only brother of Harsh's mother = Harsh's maternal uncle.
Step 2: The person in the portrait's father = Harsh's maternal uncle.
Step 3: So the person is the child of Harsh's maternal uncle.
Therefore, the person is Harsh's Cousin.
Q13. In a family, there are six members A, B, C, D, E and F. A and B are a married couple. D
is the only son of C, who is the mother of A. F is the sister of D. B is the daughter-in-law of E,
who is the father of A. How is F related to B?
(A) Daughter
(B) Mother
(C) Sister-in-law
(D) Mother-in-law
Correct Answer: (C) Sister-in-law
Explanation:
Step 1: C is mother of A, and E is father of A. So C and E are married (A's parents).
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Step 2: D is the only son of C, so D is A's brother.
Step 3: F is sister of D, so F is also A's sibling.
Step 4: B is daughter-in-law of E, so B is married to A (E's child).
Step 5: F, being A's sister, is B's Sister-in-law.
Q14. If 'A $ B' means 'A is father of B', 'A @ B' means 'A is mother of B', 'A # B' means 'A is
sister of B', then what does 'P @ Q # R $ S' mean?
(A) P is grandmother of S
(B) P is grandfather of S
(C) P is mother of S
(D) P is aunt of S
Correct Answer: (A) P is grandmother of S
Explanation:
Step 1: P @ Q means P is mother of Q.
Step 2: Q # R means Q is sister of R.
Step 3: R $ S means R is father of S.
Step 4: P is mother of Q, Q is sister of R, so P is also mother of R.
Step 5: R is father of S, so S is R's child.
Step 6: P is mother of R (S's father), so P is S's paternal grandmother.
Therefore, P is grandmother of S.
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HARD LEVEL (Questions 15-20)
Q15. A, B, C, D, E and F are six members of a family. A and B are married couple. A is the
father. C is the only son of E who is mother of A. D is the sister of A. B is the daughter-in-law
of F who is father of A. How is D related to F?
(A) Son
(B) Daughter
(C) Mother
(D) Father
Correct Answer: (B) Daughter
Explanation:
Step 1: A is father and married to B.
Step 2: E is mother of A, so E is A's mother.
Step 3: F is father of A, so F is A's father (E and F are A's parents).
Step 4: D is sister of A.
Step 5: Since F is A's father and D is A's sister, D is F's Daughter.
Q16. In a joint family, there are grandfather, grandmother, father, mother, three sons and one
married son's wife and one daughter. How many female members are there in the family?
(A) 3
(B) 4
(C) 5
(D) 2
Correct Answer: (B) 4
Explanation:
Step 1: Grandmother - 1 female
Step 2: Mother - 1 female
Step 3: One married son's wife - 1 female
Step 4: One daughter - 1 female
Total female members = 1 + 1 + 1 + 1 = 4
Therefore, there are 4 female members.
Q17. Read the following information and answer: (i) A is the mother of B but B is not the
daughter of A. (ii) A's husband is the father of C. (iii) D is the brother of A and has a daughter
E. (iv) B is the brother of C. How is E related to B?
(A) Daughter
(B) Niece
(C) Cousin
(D) Sister
Correct Answer: (C) Cousin
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Explanation:
Step 1: A is mother of B, but B is not daughter - so B is son of A.
Step 2: A's husband is father of C, so C is sibling of B.
Step 3: B is brother of C (confirmed - B is male).
Step 4: D is brother of A, so D is maternal uncle of B.
Step 5: E is daughter of D, so E is daughter of B's maternal uncle.
Therefore, E is B's Cousin.
Q18. In a family of 8 persons, there are two married couples. T is a widower and father-in-law
of P. J is grandmother of R who is a cousin of N. N is the daughter of P and has no siblings.
K is the wife of T's son. M is the husband of P. J has two sons, one of whom is M. How is K
related to N?
(A) Aunt
(B) Mother
(C) Grandmother
(D) Sister-in-law
Correct Answer: (A) Aunt
Explanation:
Step 1: T is widower and father-in-law of P.
Step 2: J is grandmother of R, and has two sons including M.
Step 3: M is husband of P, so M is T's son (since T is P's father-in-law).
Step 4: N is daughter of P and M, with no siblings.
Step 5: R is cousin of N, so R is child of M's sibling.
Step 6: J has two sons - M and another. K is wife of T's son.
Step 7: T has one son (M), and K is wife of J's other son (M's brother).
Step 8: K, being wife of N's paternal uncle, is N's Aunt.
Q19. If A x B means A is father of B; A + B means A is daughter of B; A / B means A is
mother of B; A - B means A is brother of B. Which of the following represents 'M is paternal
grandfather of N'?
(A) M x R / N
(B) M x R x N
(C) M / R x N
(D) M - R x N
Correct Answer: (B) M x R x N
Explanation:
Step 1: Paternal grandfather means father's father.
Step 2: For M to be paternal grandfather of N: M should be father of someone who is father of N.
Step 3: M x R means M is father of R.
Step 4: R x N means R is father of N.
Step 5: M x R x N means M is father of R, and R is father of N.
Therefore, M is paternal grandfather of N. Answer: M x R x N
Q20. Study the following family tree and answer: A is married to B. C is son of D who is
daughter of A. E is daughter of B. F is brother of C. G is spouse of E. H is son of G. How is H
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related to A?
(A) Grandson
(B) Great-grandson
(C) Son
(D) Nephew
Correct Answer: (B) Great-grandson
Explanation:
Step 1: A is married to B.
Step 2: D is daughter of A, so D is child of A and B.
Step 3: C is son of D, so C is A's grandchild (Generation 3).
Step 4: E is daughter of B. Since A is married to B, E is also A's child (Generation 2).
Step 5: G is spouse of E, so G is A's son-in-law/daughter-in-law.
Step 6: H is son of G. Since G is married to E, H is child of E and G.
Step 7: H is A's grandchild through E.
Generation count: A (Gen 1) -> E (Gen 2) -> H (Gen 3)
Therefore, H is A's Great-grandson.
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KEY RELATIONSHIPS REFERENCE
Relationship Description
Paternal Related through father's side (grandfather, uncle, etc.)
Maternal Related through mother's side (grandmother, aunt, etc.)
Siblings Brothers and sisters (same parents)
Cousin Child of uncle or aunt
Nephew Brother's or Sister's son
Niece Brother's or Sister's daughter
Father-in-law Spouse's father
Mother-in-law Spouse's mother
Brother-in-law Spouse's brother OR Sister's husband
Sister-in-law Spouse's sister OR Brother's wife
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