A + B means A is the mother of B. A – B means A is the brother of B. A @ B means A is the father of B, and A × B means A is the sister of B. Which of the following alternatives shows that P is the maternal uncle of Q? || ADRE 1.0 (SLRC 2022) Paper-I Solved Questions

QUESTION: 


A + B means A is the mother of B. A – B means A is the brother of B. A @ B means A is the father of B, and A × B means A is the sister of B. Which of the following alternatives shows that P is the maternal uncle of Q? 


(A) Q–N+M×P 

(B) P+S×N–Q 

(C) P–M+N×Q 

(D) Q–S@P


SOLUTION:


Step 1: break down each symbol

  • A + B: A is the mother of B.

  • A – B: A is the brother of B.

  • A @ B: A is the father of B.

  • A × B: A is the sister of B.

We have to find the expression where P is the maternal uncle of Q 


Step 2: analyse each option one by one


(A) Q–N+M×P 

  • Q is the brother of N; 

  • N is the mother of M; 

  • M is the sister of P

  • Analysis: This does not show P as Q's maternal uncle.


(B) P+S×N–Q 

  • P is the mother of S; 

  • S is the sister of N; 

  • N is the brother of Q

  • Analysis: This does not show P as Q's maternal uncle.


(C) P–M+N×Q 

  • P is the brother of of M; 

  • M is the mother of N; 

  • N is the sister of Q

  • Analysis: P is the brother of M, who is the mother of N, making P the maternal uncle of Q.





(D) Q–S@P

  • Q is the brother of S; 

  • S is the father of P

  • Analysis: This does not show P as Q's maternal uncle.



Option

Expression

Explanation

(A)

Q – N + M × P

Incorrect. 

(B)

P + S × N – Q

Incorrect. 

(C)

P – M + N × Q

Correct. P is the brother of M, who is the mother of Q, making him the maternal uncle.

(D)

Q – S @ P

Incorrect. 


Correct option: (C) P–M+N×Q 


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