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In a certain code language, 'P + Q' means 'P is the mother of Q', 'P - Q' means 'P is the husband of Q', 'P x Q' means 'P is the sister of Q' and 'P ├╖ Q' means 'P is the brother of Q'. How is A related to E if 'A + B - C + D x E'?
Father's sister
Father's mother
Mother's sister
Mother's mother
Father's mother
Break down the expression by identifying gender markers: '+' implies Female for the first person, and work backwards from the target 'E'.
Break down the expression by identifying gender markers: '+' implies Female for the first person, and work backwards from the target 'E'.
Analyze the expression A + B - C + D x E
Break down step-by-step: 1) A + B means A is the mother of B (A is female). 2) B - C means B is the husband of C (B is male, C is female). 3) C + D means C is the mother of D (C is female). 4) D x E means D is the sister of E (D is female).
Construct the relationship tree
A is the mother of B. B is married to C. Since C is the mother of D, and D is the sister of E, then C is also the mother of E. Therefore, A is the mother of B, and B is the father of E. Consequently, A is the mother of E's father.
Identify the relation
A is the mother of E's father, which makes A the paternal grandmother (father's mother) of E.
A: Father's sister is incorrect because A is the mother of the father. C: Mother's sister is incorrect as B is the father. D: Mother's mother is incorrect because A is related to the father's side.
B is correct because the expression 'A + B - C + D x E' establishes that A is the mother of B, B is the father of D and E, making A the father's mother of E.
In blood relation expressions, always denote gender (+ or -) and generation gaps early to avoid confusion; 'x' and '+' symbols often define specific gender roles in exams.
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