Correct Marks 2
Incorrectly Marks -0.5
Q 1. A is B's daughter. B is C's mother. D is C's brother. How is D related to A ?
Father
Grandfather
Brother
Son
A is the daughter of B.
B is the mother of C.
Therefore, B is the mother of A and C.
D is the brother of C.
Therefore, D is the son of B.
Thus, D is the brother of A.
PICTORIAL METHOD 
Correct Marks 2
Incorrectly Marks -0.5
Q 2. A is B's brother. C is D's father. E is B's mother. A and D are brothers. How is E related to C?
Sister
Sister-in-law
Niece
Wife
A is the brother of B.
Therefore, A is a male.
C is the father of D.
Therefore, C is a male.
E is the mother of B. Therefore, E is a female.
A and D are brothers. Therefore, D is male.
Deductions
(i) A and D are brothers of B.
(ii) C is the father of A, B, and D.
(iii) C is the mother of A, B and D.
(iv) E is the wife of C.
Correct Marks 2
Incorrectly Marks -0.5
Q 3. A is the sister of B. B is the brother of C, C is the son of D. How is D related to A?
Mother
Daughter
Son
Uncle
B is the brother of C. C is the son of D. A is the sister of B and C. 
Thus, D is either father or mother of A, B and C. According to the given options, we are left with no choice but to select option (1) as answer.
Correct Marks 2
Incorrectly Marks -0.5
Q 4. A and B are sisters. R and S are brothers. A's daughter is R's sister. What is B's relation to S?
Mother
Grandmother
Sister
Aunt
A's daughter is the sister of R and S. B is the sister of A. Therefore, B is aunt of S. 
Correct Marks 2
Incorrectly Marks -0.5
Q 5. E is the sister of B. A is the father of C. B is the son of C. How is A related to E?
Grandfather
Granddaughter
Father
Great-grandfather
B is the son of C and grandson of A. E is a sister of B. Therefore, A is the grandfather of E.
Here sex of C is not known.
Hence there are two possibilities:
(i) If C is female then A is the grandfather (maternal) of E (and also B) and
(ii) If C is male than A is the grandfather (paternal) of E (and also B).
Correct Marks 2
Incorrectly Marks -0.5
Q 6. A is B's brother, C is A's mother, D is C's father, E is B's son. How is D related to A?
Son
Grandson
Grandfather
Great Grandfather
Clearly, D is father of A's mother (C) i.e., grandfather (maternal) of A.
Correct Marks 2
Incorrectly Marks -0.5
Q 7. A is D's brother. D is B's father. B and C are sisters. How is A related to C?
Son
Grandson
Father
Uncle
So C and B are daughters of D. So, A is uncle of D's daughter (B and) C.
Correct Marks 2
Incorrectly Marks -0.5
Q 8. A is B's sister, C is B's mother, D is C's father, E is D's mother, then how A is related to D?
Grandfather
Daughter
Grandmother
Grand daughter
Correct Marks 2
Incorrectly Marks -0.5
Q 9. C is the wife of B, E is the son of C, A is the brother of B and father of D. What is the relationship of E to D?
Mother
Sister
Brother
Cousin
Though sex of D is not clear but clearly E+ is D's cousin.
Correct Marks 2
Incorrectly Marks -0.5
Q 10. X and Y are brothers. R is the father of Y. S is the brother of T and maternal uncle of X. What is T to R?
Mother
Wife
Sister
Brother
Clearly, S is maternal uncle (i.e., brother of mother) of X (and Y). So there are two possibilities:
(i) When T is male- then T will also be maternal uncle of X (and Y) i.e., he will be the second brother in law of R. Option not given.
(ii) When T is female - then either T will herself be the mother of X and Y or will be the sister of X and Y's mother. So either T will be the wife of R (i.e., father of X and Y) or T will be sister in law of R. Only R's wife is given in options - option (2).
Correct Marks 2
Incorrectly Marks -0.5
Q 11. A is B's sister. C is B's mother. D is C's father. E is D's mother. Then how is A related to D?
Grandmother
Grandfather
Daughter
Granddaughter
From above figure it is clear that D is grand father (maternal, i.e., mother's father) of A and B.
Correct Marks 2
Incorrectly Marks -0.5
Q 12. A is the father of B, C is the daughter of B, D is the brother of B, E is the son of A. What is the relationship between C and E?
Brother and sister
Cousins
Niece and uncle
Uncle and aunt
Clearly, A is the father of E, D, and B of which E and D are sons and B's sex is not given and C is B's daughter hence two possibilities exist:
(i) When B is female - then E (and also D) is the maternal uncle of C. So option (3).
(ii) When B is male - then E (and also D) is the paternal uncle of C. Hence C and E are nice and uncle respectively. Option (3) is correct.
Correct Marks 2
Incorrectly Marks -0.5
Q 13. If P is the husband of Q and R is the mother of S and Q, what is R to P?
Mother
Sister
Aunt
Mother-in-law
Clearly P is husband (male then Q is wife (female) and R is Q's mother. So R is P's mother-inlaw.
Correct Marks 2
Incorrectly Marks -0.5
Q 14. X is the husband of Y. W is the daughter of X. Z is the husband of W. N is the daughter of Z. What is the relationship of N to Y?
Cousin
Niece
Daughter
Granddaughter
X is the husband of Y. Therefore Y is the wife of X. W is the daughter of X and Y. Z is the husband of W. N is the daughter of Z and W. Thus, N is the granddaughter of Y.
Correct Marks 2
Incorrectly Marks -0.5
Q 15. A reads a book and find the name of the author familiar. The author B is the paternal uncle of C. C is the daughter of A. How is B related to A?
Brother
Sister
Father
Uncle
B is the paternal uncle of C and C is the daughter of A. Hence B is the brother of A.
Correct Marks 2
Incorrectly Marks -0.5
Q 16. A's mother is sister of B and she has a daughter C who is 21 years old. How is B related to C?
Uncle
Maternal Uncle
Niece
Daughter
Mother of A is the sister of B. C is the daughter of A's mother. The sex of B is not given. Therefore, B could be either material uncle or aunt of C. Considering all the four options the most appropriate is option (2).