Blood Relations Question 1: Consider the following statements and answer the question.

> M, N, O and P are all different individuals.

> M is the daughter of N.

> N is the son of O.

> O is the father of P.

Which among the following statements is contradictory to the above premises?

A. P is the father of M.

B. O has three children.

C. M has one brother.

D. M is the granddaughter of O.

Blood Relation Tree:

Blood Relation Tree (Practice Exercise 1)

Let’s check the options:

A. P can be uncle or aunt of M, but not the father. So, this option contradicts the given premises.

B. It can be possible for O to have 3 children if N and P have 1 more sibling. So, this option does not contradict the given premises.

C. M has one brother. This is also possible. So, this option does not contradict the given premises as well.

D. Clearly, M is the granddaughter of O. So, this option does not contradict the given premises as well.

Therefore, A is the correct option.

Blood Relations Question 2: Use the information given below to answer the question.

I. There is a group of five persons A, B, C, D, and E.

II. In the group, there is one badminton player, one chess player, and one tennis player.

III. A and D are unmarried ladies and they do not play any games.

IV. No lady is a chess player or a badminton player.

V. There is a married couple in the group of which E is the husband.

VI. B is the brother of C and is neither a chess player nor a tennis player.

1. Which of the groups has only ladies?

A. ABC

B. BCD

C. CDE

D. None of these

2. Who is the tennis player?

A. B

B. C

C. D

D. E

3. Who is the wife of E?

A. A

B. B

C. D

D. None of these

> There is a married couple in the group of which E is the husband. A and D are unmarried and B is the brother of C.

This implies C is the wife of E. Therefore, A, D and C are females, and B and E are males.

> A and D do not play any game. No lady plays Chess or Badminton.

This implies C plays Tennis.

> B does not play Chess and Tennis.

This implies B plays Badminton and E plays Chess.

Now let’s answer the questions:

1. The ladies are A, D and C. Therefore, D is the correct option.

2. C is the tennis player. So, B is the correct option.

3.  C is the wife of E. Therefore, D is the correct option.

Blood Relations Question 3: Each child in a family has at least 4 brothers and 3 sisters. What is the smallest number of children the family might have?

A. 7

B. 8

C. 9

D. 10

> If the child is a male, then he should have at least 4 brothers. This means the family consists of at least 5 male children.

> Similarly, if the child is a female, she should have at least 3 sisters. This means the family consists of at least 4 female children.

Therefore, the family consists of at least (5 boys + 4 girls) = 9 children. So, C is the correct option.

Blood Relations Question 4:

Pointing to a photograph, Yuvraj says, “He is the only brother of the only daughter of my sister’s maternal grandmother.”

Pointing to another photograph Sourav says, “He is the only brother of the only daughter of my sister’s maternal grandmother.”

If among the two photographs, one was either of Sourav or Yuvraj, and the photograph towards which Yuvraj was pointing, was not of Sourav, then how is Yuvraj related to Sourav?

A. Paternal Uncle

B. Maternal Uncle

C. Grandfather

D. None of the above

Both Yuvraj and Saurav said the same statements.

Blood Relation Tree for Yuvraj’s statement:

Blood Relation Tree for Yuvraj (Practice Exercise 4)

Clearly, the man in the photograph can’t be Yuvraj himself. Also, it is given that the man in the photograph towards which Yuvraj pointed is not Sourav.

Blood Relation Tree for Sourav’s Statement:

Blood Relation Tree for Sourav (Practice Exercise 4)

The man in the photograph can’t be Sourav himself. Also, it is given that the man in one of the photographs is either Yuvraj or Sourav. This implies that the man in the photograph towards which Sourav pointed is Yuvraj.

Therefore, Yuvraj is Sourav’s maternal uncle. So, B is the correct option.

Blood Relations Question 5: Read the following information to answer the question that follows.

P – Q means that Q is the father of P

P ∗ Q means Q is the brother of P

P ÷ Q means Q is the wife of P

P + Q means Q is the sister of P

Which of the following means M is the grandfather of T?

A. T – C ÷ L + N ∗ M

B. T – R ÷ Z + L ∗ M

C. T ÷ Z ∗ L + F – M

D. None of these

The correct option must include two ‘-‘ signs because that is the only symbol for going up one generation. None of the first three options includes two ‘-‘ signs. So, D is the correct option.