MCQs' Blood Relations - Quantitative Aptitude for CA Foundation

Q1: Pointing to a photograph, Rajesh said, “He is Aarav and he is the son of the only daughter of the father of my brother”, how is Rajesh related to the Aarav referred in the photograph?
(a) Nephew
(b) Brother
(c) Father
(d) Maternal uncle
Ans: (d)

Sol:
According to given condition, we have
Since, Aarav is Rajesh’s sister son. 
Therefore, Rajesh is maternal uncle of Aarav

Q2: E is the son of A. D is the son of B. E is married to C. C is B’s daughter. How is D related to E?
(a) Brother
(b) Uncle
(c) Father-in-law
(d) Brother-in-law
Ans: (d)

Sol:

Presenting the given relations in diagram,
we get
Therefore, D is brother-in-law of E.

Q3: X and Y are the children of A. A is the father of X but Y is not his son. How is Y related to A?
(a) Son
(b) Daughter
(c) Sister
(d) Brother
Ans: (b)

Sol:
Presenting the given relations in diagram,

we get
Since, Y is not A’s son. 
Therefore, Y is daughter of A.

Q4: C is sister of B, D is father of A. A is brother of B. D and F are married couple. How is C related to E?
(a) Son
(b) Daughter
(c) Mother
(d) Father
Ans: (b)

Sol:
Presenting the given relations in diagram,
where, – → female, + → Male, = → Married 
Therefore, C is daughter of E. 

Q5: B is daughter of A. C is brother of B. C is the only son of D. C and E are married couple. F is the only son of E. Then how is F related to A?
(a) Father
(b) Grandson
(c) Brother
(d) Uncle
Ans: (b)

Sol:
Presenting the given relations in diagram,
we get

where, – → female, + → Male, = → Married 
Therefore, F is grandson of A.

Q6: Pointing to the old man Kailash said ‘his son is my son’s uncle’ How is Kailash related to an old man?
(a) Brother
(b) Either son or son in law
(c) Father
(d) Grand father
Ans: (b)

Sol:
According to the question,

Make a flow diagram along to the scenarios,
We can clearly see; Kailash is either the son orson-in-law.

Q7: A reads a book and finds 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?
(a) Brother
(b) Sister
(c) Father
(d) Uncle
Ans: (a)

Sol:
According to the question,

B is paternal uncle of C and C is daughter of A

Thus, there are two possibilities:

(i) If A is father of C then B is brother of A.

(ii) If A is mother of C then B is brother-in-law

of A.

Out of the given options, we are given with ‘brother’ as a option.

The diagram according to the given scenarios,

Thus, B is the brother of A.

Hence, the correct answer is option (a).

Q8: f “A #B” means A is father of B, “A * B” means A is brother of B, “A @ B” means A is mother of B, then which of the following is correct about G @T #P?
(a) G is mother of P
(b) P is father of T
(c) T is son of G
(d) P is brother of T
Ans: (c)

Sol:
Presenting G @ T # P in the diagram, we get
where, negative sign represent person is a female and positive sign represents person is a male.

Therefore, from above diagram, we get
T is son of G

Q9: Anita is the niece of Prateek’s mother. Anita’s mother is Prateek’s aunt. Rohan is Anita’s mother’s brother. Rohan’s mother is Anita’s grandmother. From this information, deduce the relationship between
Rohan’s mother is ________ Anita’s mother.
(a) Aunt
(b) Mother
(c) No relation
(d) Sister
Ans: (b)

Sol:
According to the given information, we have
Therefore, Rohan’s mother is mother Anita’s mother.

Q10: Read the following information and answer the questions given below:
Anita is the niece of Prateek’s mother. Anita’s mother is Prateek’s aunt. Rohan is Anita’s mother’s brother. Rohan’s mother is Anita’s grandmother. From this information, deduce the relationship between
Prateek’s and Anita’s mother are ________
(a) Cousin sister
(b) Sister-in-law
(c) Friends
(d) Sisters
Ans: (d)

Sol:
According to the given information, we get
Therefore, Preteek’s and Anita’s mother are  sister.

Q11: Sheba is the niece of Ashish. Ashish’s mother is Priya. Kamla is Priya’s mother. Kamla’s husband is Krishna. Sheela is the mother of Krishna and Krishna is Shobha related to Hari?
(a) Daughter
(b) Great Grand daughter
(c) Grandniece
(d) Great Grandson’s daughter
Ans: (b)

Sol:
According to question, we have

•  Ashish’s mother → Priya
• Priya’s mother → Kamla; Kamla’s husband
• → Hari (so Hari is Priya’s father)
• Shobha is Ashish’s niece → daughter of
• Ashish’s sibling → Priya’s

Therefore, to Priya’s father (Hari), Shobha is a great-granddaughter.

Q12: Pointing to a boy in a photograph, Neena said, “He is the son of my grandmother’s only daughter”. How is Neena related to that boy?
(a) Mother
(b) Aunt
(c) Grand Mother
(d) Sister
Ans: (d)

Sol:

According to question, we have

“My grandmother’s only daughter” = Neena’s mother.

 So the boy is “the son of my mother” → Neena’s brother. 
Hence Neena is his sister.

Q13: Pointing to a lady, man said, “The son of her only brother is the brother of my wife”. How is lady is related to the man?
(a) Mother’s sister
(b) Grandmother
(c) Sister of father-in-law
(d) Maternal Aunt
Ans: (c)

Sol:
According to question, we have

“Her only brother’s son” = that brother’s child.

 That son is “the brother of my wife” → he’s the son of my wife’s father.

So “her only brother” = my wife’s father (my father-in-law). 
Therefore, the lady is the sister of the man’s  father-in-law.

Q14: A family has a man, his wife, their four sons and their wives. The family of every son also has 3 sons and one daughter. Find out the total number of male members in the whole family?
(a) 4
(b) 8
(c) 12
(d) 17
Ans: (d)

Sol:
According to question, we have

• Man → 1 male
• His 4 sons → 4 males
• Each son has 3 sons → 4 × 3 = 12 males

Therefore, total males = 1 + 4 + 12 = 17

Q15: Read the following information and answer the question:
A + B means A is the daughter of B
A × B means A is the son of B
A – B means A is the wife of B
If P × Q – S which of the following is true?
(a) S is wife of B
(b) S is father of P
(c) P is daughter of Q
(d) Q is father of P
Ans: (b)

Sol:
According to question, we have

• P × Q ⇒ P is the son of Q (so Q is P’s mother of father).
• Q × S ⇒ Q is the wife of S (so Q is female and S is her husband).

Therefore, Q is P’s mother, and S (her husband) is P’s father. Hence S is father of P.

Q16:  A and B both are children of C. If C is the mother of A, A is the son of C but B is not the daughter of C, then how are A and B mutually related?
(a) A is the brother of B
(b) A is the nephew of B
(c) A is the sister of B
(d) A is the cousin of B
Ans: (a)

Sol:
​According to question, we have

Both A and B are children of C. C is the mother,
A is a son, and B is not a daughter — so B must also be a son. 
Two sons of the same parent are brothers.
Hence, A is B’s brother.

Q17: A husband and wife had five married sons and each of these had four children. How many members are there in the family?
(a) 50
(b) 40
(c) 32
(d) 36
Ans: (c)

Sol:
According to question, we have 

• Couple = 2
• Five married sons = 5
• Their wives = 5
• Each son has 4 children → 5 × 4 = 20

Total = 2 (couple) + 5 + 5 + 20 = 32

Q18: Pointing to the lady in the photograph, Seema said, “Her son’s father is the son-in-law of my mother”. How is Seema related to the lady?
(a) Sister
(b) Mother
(c) Cousin
(d) Aunt
Ans: (a)

Sol:
 According to question, we have
“Son-in-law of my mother” means a man married to one of my mother’s daughters (i.e., either Seema herself or Seema’s sister).
 That man is also described as the father of the lady’s son, so he is the lady’s husband. 
Therefore the lady must be a daughter of Seema’s mother i.e., Seema’s sister.

Q19: 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?
(a) Sister
(b) Sister-in-law
(c) Niece
(d) Wife
Ans: (d)

Sol:
 E is B’s mother, so E is also A’s mother. A and D are brothers, so D is also E’s son. C is D’s father, therefore C is E’s huband. 
Therefore, E is C’s wife.

Q20: A is B’s brother, C is A’s mother, D is C’s father, E is B’s son. How is B related to D?
(a) Son 
(b) Grand daughter
(c) Grandfather
(d) Great Grandfather
Ans: (d)

Sol:
C is A’s mother → C is also B’s mother (since A and B are siblings).
D is C’s father → D is the grandfather of C’s children (A and B).

Therefore, B (a child of C) is D’s Great Grandfather