Question

If ‘A + B’ means A is the brother of B, ‘A – B’ means A is the sister of B, and ‘A × B’ means A is the father of B, then which of the following means that M is the daughter of N?

• A. N × M
• B. M – N
• C. N + M
• D. M × N

Hint:

Decode relationship symbols and focus on the gender and role specified in the question.

Answer 1

The Correct Option is B

We need to find the expression where M is N’s daughter.
- Step 1: Decode symbols:
- A + B: A is B’s brother (both male, siblings).
- A – B: A is B’s sister (A female, siblings).
- A × B: A is B’s father.
- Step 2: Analyze options:
- (a) N × M: N is M’s father, so M is N’s child (possibly daughter).
- (b) M – N: M is N’s sister, so M is female and N is her sibling (gender unspecified).
- (c) N + M: N is M’s brother, so M is male, not daughter.
- (d) M × N: M is N’s father, so M is male, not daughter.
- Step 3: Check for daughter: Option b (M – N) means M is female. If N is the father, M is his daughter.
- Step 4: Confirm: Option b ensures M is female, fitting the requirement.
Thus, the answer is b.