Blood Relations Questions On Logical Reasoning
Q1. Pointing to a photograph, a man said, “I have no brother or sister but that man’s father is my father’s son.” Whose photograph was it?
A. His uncle’s B. His nephew’s
C. His son’s D. His Cousin’s
Answer:: C. His son’s
Explanation::
Since the narrator has no brother, his father’s son is he himself. So, the man who is talking is the father of the man in the photograph. Thus, the man in the photograph is his son.
Q2. A man said to a lady, “Your mother’s husband’s sister is my aunt!! How is the lady related to the man ?
A. Daughter B. Grand daughter
C. Mother D. Sister
Answer:: D. Sister
Explanation::
Your mother’s husband — Your father; Your father’s sister — Your aunt.
So, lady’s aunt is man’s aunt and therefore lady is man’s sister.
Q3. Pointing to a girl in the photograph, Amar said, “Her mother’s brother is the only son of my mother’s father.” How is the girl’s mother related to Amar ?
A. Mother B. Sister
C. Aunt D. Grandmother
Answer:: C. Aunt
Explanation::
Only son of Amar’s mother’s father — Amar’s maternal uncle.
So, the girl’s maternal uncle is Arnar’s maternal uncle. Thus, the girl’s mother is Amar’s aunt.
Q4. If ‘A $ B’ means ‘A is brother of B’, ‘A @ B’means ‘A is wife of B’, ‘A # B’ means ‘A is daughter of B’ and ‘A & B’means ‘A is father of B’, then which of the following expressions indicates the relationship ‘K’ is father-in-law of H’?
A. H @ J $ L # P & K B. H @ J $ P & L # K
C. H @ J $ L # K & P D. H @ P $ J & L # K
Answer:: C. H @ J $ L # K & P
Explanation::
K is the father-in-law of H means H is the wife of the brother (say, J) of the daughter (say, L) of K and K is a male (brother or father of some person, say P) i.e H @ J $ L # K $ P or H @ J $ L # K & P.
Q5. When Anuj saw Manish, he recalled, “He is the son of the father of my daughter.” Who is Manish ?
A. Brother-in-law B. Brother
C. Cousin D. Uncle
Answer:: A. Brother-in-law
Explanation::
Anuj’s daughter’s mother — Anuj’s wife ;
Anju’s wife’s father – Anuj’s father-in-law;
Father-in-law’s son — Anuj’s brother-in-law
So, Manish is Anuj’s brother-in-law
Q6. A man pointing to a photograph says, ‘The lady in the photograph is my nephew’s maternal grandmother.” How is the lady in the photograph related to the man’s sister who has no other sister ?
A. Cousin B. Sister-in-law
C. Mother D. Mother-in-law
Answer:: C. Mother
Explanation::
Clearly, the lady is the grandmother of man’s sister’s son i.e.. the mother of the mother of man’s sister’s son
i.e., the mother of man’s sister. So, the lady is man’s mother.
Q7. Pointing to an old man, Kailash said, “His son is my son’s uncle.” How is the old man related to Kailash ?
A. Brother B. Uncle
C. Father D. Grandfather
Answer:: C. Father
Explanation::
Kailash’s son’s uncle — Kailash’s brother. So. the old man’s son is Kailash’s brother
i.e., the old man is Kailash’s father.
Q7. Pointing to a gentleman, Deepak said, “His only brother is the father of my daughter’s father.” How the gentleman related to Deepak ?
A. Grandfather B. Father
C. Brother-in-law D. Uncle
Answer:: D. Uncle
Explanation::
Father of Deepak’s daughter’s father — Deepak’s father.
So, the man’s brother is Deepak’s father or the man is the brother of Deepak’s father i.e., Deepak’s uncle.
Q8. Pointing to a man in a photograph. Asha said. “His mother’s only daughter is my mother.” How is Asha related to that man ?
A. Nephew B. Sister
C. Wife D. Niece
Answer:: D. Niece
Explanation::
Asha’s mother’s mother is man’s mother i.e.. A.sha’s mother is man’s sister or Asita is man’s niece.
Q9. Rahul told Anand, ‘Yesterday I defeated the only brother of the daughter of my grandmother.’ Whom did Rahul defeat
A. Son B. Father
C. Brother D. Father-in. law
Answer:: B. Father
Explanation::
Daughter of grandmother — Aunt: Aunt’s only brother — Father.
Q10.X introduces Y saying, “He is the husband of the granddaughter of the father of my father “. How is Y related to X?
A. Brother B. Brother-in-law
C. Son D. Son-in-law
Answer:: B. Brother-in-law
Explanation::
Father’s father —->Grandfather; Grandfather’s granddaughter —–> Sister; Sister’s husband —->Brother-in-law. So, Y is X’s Brother-in-law.
Q11. Pointing to a photograph, a person tells his friend, “She is the grand daughter of the elder brother of my father.” How is the girl in the photograph related to his Man?
A. Niece B. Sister
C. Aunt D. Sister-in-law
Answer:: A. Niece
Explanation::
Brother of father — Uncle;
Uncle’s grand daughter — daughter of uncle’s son — daughter of cousin — niece.
Q12. I. A, B, C, D, E and F are six members of a family.
II. One couple has parents and their children in the family.
III. A is the son of C and E is the daughter of A.
IV. D is the daughter of F who is the mother of E.
Who are the male members in the family ?
A. A and C B. C and F
C. A, B and D D. Cannot be determined
Answer:: D. Cannot be determined
Explanation::
E is the daughter of A and F is the mother of E. So, A is the father of E and hence the husband of F. Now,
D is the daughter of F. So, D and E are the daughters of A and F Also. A is the son of C.
Now, only B remains. Thus, B and C are the parents of A.
The sex of B and C cannot be determined:
Q13. Rahul’s mother is the only daughter of Monika’s father. How is Monika’s husband related to Rahul ?
A. Uncle B. Father
C. Grandfather D. Brother
Answer:: B. Father
Explanation::
Clearly, the only daughter or Monika’s father is Monika herself
So, Rahul’s mother is Monika
Thus, Monika’s husband is the father of Rahul.
Q14. 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?
A. Grandfather B. Grandmother
C. Daughter D. Granddaughter
Answer:: D. Granddaughter
Explanation::
A is the sister of B and B is the daughter of C.
So, A is the daughter of C. Also, D is the father of C.
So, A is the granddaughter of D.
Q15. In a family, there are six members A, B, C, D, E and F.
A and B are a married couple, A being the male member. D is the only son of C, who is the brother of A. E is the sister of D. B is the daughter-in-law of F, whose husband has died. How is E related to C ?
A. Sister B. Daughter
C. Cousin D. Mother
Answer:: B. Daughter
Explanation::
A is a male and married to B. So, A is the husband and B is the wife. C is the brother of A. D is the son of C. E. who is the sister of D will be the daughter of C. B is the daughter-in-law of F whose husband has died means F is the mother of A.
Clearly. E is the daughter of C.
Q16. Pointing to a person, a man said to a woman, “His mother is the only daughter of your father.” How was the woman related to the person ?
A. Aunt B. Mother
C. Wife D. Daughter
Answer:: A. Aunt
Explanation::
Daughter of your father — Your sister. So, the person’s mother is woman’s sister or the woman is person’s aunt.
Q17. A girl introduced a boy as the son of’ the daughter of the father of her uncle. The boy is girl’s
A. Brother B. Son
C. Uncle D. Son-in-law
Answer:: A. Brother
Explanation::
Daughter of uncle’s father — Uncle’s sister — Mother;
Mother’s son — Brother
Q18. There are six persons A. B, C, D, E and F. C is the sister of F. B is the brother of E’s husband. D is the father of A and grandfather of F. There are two fathers, three brothers and a mother in the group. Who is the mother ?
A. A B. B
C. C D. E
Answer:: D. E
Explanation:😀 is father of A and grandfather of F. So, A is father of F.
Thus. D and A are the two fathers. C is the sister of F So. C is the daughter of A.
Since there is only one mother, it is evident that E is the wife of A and hence the mother of C and F.
So, B is brother of A There are three brothers. So. F is the brother of C.
Clearly, A is E’s Husband.
Q19. 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 to Grandson
Answer: C. Cousin
Explanation::
Brother of mother — Uncle: Uncle’s son — Cousin
Q20. Brothers and Sisters I have None ::
Looking at a portrait of a man, Harsh said, “His mother is the wife of my father’s son. Brothers and sisters I have none.” At whose portrait was Harsh looking?
A. His son B. His cousin
C. His uncle D. His nephew
Answer:: A. His son
Explanation::
Since Harsh has no brother or sister, so he is his father’s only son. Now, wife of my father’s son — my wife.
So, Harsh’s wife is the man’s mother or the man is Harsh’s son.
Q21. Pointing to a lady, a man said, “The son of her only brother is the brother of my wife.” How is the lady related to the man ?
A. Mother’s sister B. Grandmother
C. Mother-in-law D. Sister of father-in-law
Answer:: D. Sister of father-in-law
Explanation::
Brother of my wife — My brother.in-law; Son of lady’s brother is the brother-in-law of the man.
So lady’s brother is man’s father-in-law
i.e., the lady is the sister of man’s father-in-law.
Q22. Pointing out to a lady, a girl said, “She is the daughter-in-law of the grandmother of my father’s only son.” How is the lady related to the girl ?
A. Sister-in-law B. Mother
C. Aunt D. Can’t be determined
Answer:: D. Can’t be determined
Explanation::
Girls’s father’s only son— Girl’s brother. Daughter in law of girl’s grandmother can be their mother, or maternal uncle’s wife, i.e. aunt. So relation cannot be determined.
Q23. P is the brother of Q and R. S is R’s mother. T is P’s father. Which of the following statements cannot be definitely true ?
A. T is Q’s father B. S is P’s mother
C. P is S’s son D. Q is T’s son
Answer::: D. Q is T’s son
Explanation::
P, Q, R are children of same parents. So. S who is R’s mother and T, who is R’s father will be mother and father of all three.
However, it is not mentioned whether Q is male or female So, D cannot be definitely true.
DIRECTION TO SOLVE
(i) In a family of six persons A, B, C, D, E and F, there are two married couples.
(ii) D is grandmother of A and mother of B.
(iii) C is wife of B and mother of F.
(iv) F is the grand daughter of E.
Who among the following is one of the couples ?
A. CD B. DE
C. EB D. none of these
Answer:: D. none of these
Explanation::
C is wife of B. So, one couple is BC. Now, D in grandmother of A, B is the son of D and his wife C is the mother of F. SO, D is also the grandmother of F But F is the granddaughter of E.
So, E is the grandfather of F and the husband of D. Thus, DF is another couple
Q25. is the brother of R;
P is the sister of Q;
T is the brother of S;
S is the daughter of R.
Who are the cousins of Q ?
A. R and P B. P and T
C. Q and T D. S and T
Answer:: D. S and T
Explanation::
T is the brother of S, who is the daughter of R. So, T and S are the children of R.
Now. Q is the brother of R. So, T and S are the cousins of Q.
Q26. Introducing a man, a woman said, ‘He is the only son of my mother’s mother.” How is the woman related to the man ?
A. Mother B. Aunt
C. Sister D. Niece
Answer:: D. Niece
Explanation::
My mother’s mother — My grandmother: My grandmother’s only son — My maternal uncle. So, the woman is man’s niece.
Q27. Pointing to a woman, a man said, “Her father is the only son of my father.” How is the man related to the woman?
A. Father B. Brother
C. Uncle D. Brother-in-law
Answer:: B. Brother
Explanation::
The man said, “Her father is the only son of my father.”
Then the woman’s father and the man’s is the same
=> The woman and the man are brother and sisters.
Hence, the man is the brother of the woman.
Q28. A is the brother of B. B is the brother of C. D is the father of A. Based on these three statements, which of the following statements cannot be definitely true ?
A. B is the brother of A. B. B is the son of D.
C. A is the brother of C. D. C is the brother of A.
Answer:: D. C is the brother of A.
Explanation::
A is the brother of B and B is the brother of C. So, C may be the brother or sister of A.
Q29. A is father of C and D is son of B. E is brother of A. If C is sister of D, how is B related to E ?
A. Daughter B. Brother
C. Husband D. Sister-in-law
Answer:: D. Sister-in-law
Explanation::
A is father of C and C is sister of D. So, A is father of D.
But D is son of B. So, B is the mother of D and wife of K Also. E is the brother of A So, B is the sister-in-law of E.
Q30. Rita told Mani, “The girl I met yesterday at the beach was the youngest daughter of the brother-in-law of my friend’s mother.” How is the girl related to Rita’s friend ?
A. Cousin B. Daughter
C. Niece D. Friend
Answer:: A. Cousin
Explanation::
Daughter of brother-in-law — Niece;
Mother’s niece — Cousin.
So, the girl is the cousin of Rita’s friend.
