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Blood Relation

Blood Relation - Important Points


16. If 'A$B' means 'A is the father of B', 'A * B' means 'A is the mother of B' 'A @ B' means 'A is the wife of B’, then which of the following means ‘M is the grandmother of N'?

A. M*T$N@R

B. M*T$R@N

C. M*R$T@N

D. M*R@T@N

Discuss Work Space

Answer: option a

Explanation:

'M is the grandmother of N' means 'M is the mother of the father (say T) of N' i.e. M*T$N.

17.

Directions (Q17 – 19):Read the following information carefully to answer the question given below:

(i) 'A × B' means 'A is the brother of B';

(ii) 'A ÷ B' means 'B is the father of A';

(iii) 'A + B' means 'A is the sister of B';

(iv) 'A - B’ means 'A is the mother of B';

Which of the following means 'Q is the paternal uncle of K'?

(a) K × P ÷ M × Q

(b) K × B ÷ N × Q × D

(c) Q × L ÷R × K

A. Only (a)

B. Only (b)

C. Only (c)

D. Both (a) and (b)

Discuss Work Space

Answer: option b

Explanation:

(a) 'K × P ÷ M × Q' means 'K is the brother of P whose father is M, who is the brother of Q'. Thus, K is the child of M, who is the brother of Q. So, Q may be the paternal uncle or aunt of K.
(b) 'K × B ÷ N ×Q × D' means 'K is the brother of B, whose father is N, who is the brother of Q, who in turn is the brother of D. Thus, N is the father of K, and Q is the brother of N. So, Q is the paternal uncle of K.
(c) 'Q × L ÷ R × K' means 'Q is the brother of L whose father is R, who is the brother of K. Thus, R is the father of Q and R is the brother of K. So, K may be the paternal uncle or aunt of Q. Thus, only (b) represents the correct relation. Hence the answer is (b).


18. Which of the following statements is/are superfluous to answer the above question?

A. (i) only

B. (ii) only

C. (iii) only

D. Only (iii) and (iv)

Discuss Work Space

Answer: option d

Explanation:

Clearly, we used only (i) and (ii) to answer the above question, while (iii) and (iv) are superfluous.

19. If 'P+Q' means 'P is the father of Q' 'P×Q' means 'P is the brother of Q'; 'P-Q' means 'P is the mother of Q', then which of the following is definitely true about C-A+B?

A. B is the son of A.

B. A is the son of C.

C. B is the father of A.

D. C is the mother of B.

Discuss Work Space

Answer: option b

Explanation:

'C-A+B' means ‘C is the mother of A who is the father of B'. This clearly implies that A is male and hence the son of C.


Blood Relation Questions and Answers FAQ

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