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In a certain code language, 'P + Q' means 'P is the mother of Q', 'P - Q' means 'P is the wife of Q', 'P x Q' means 'P is the father of Q' and 'P ├╖ Q' means 'P is the brother of Q'. How is A related to E if 'A + B - C x D ├╖ E'?
Mother's sister
Mother's mother
Father's mother
Father's sister
Mother's mother
Break down the expression symbol by symbol to trace the generational lineage: A is the mother of B, B is the wife of C, C is the father of D, and D is the brother of E.
Break down the expression symbol by symbol to trace the generational lineage: A is the mother of B, B is the wife of C, C is the father of D, and D is the brother of E.
Deconstruct the expression
The expression is A + B - C x D / E. Translating symbols: + is mother, - is wife, x is father, / is brother.
Trace relationships
A is mother of B. B is wife of C (A is C's mother-in-law). C is father of D. D is brother of E. Therefore, C is also the father of E. Since B is the wife of C, A is the mother of C's wife (B).
Identify the final relationship
A is the mother of B. Since B is the mother of E (via C's fatherhood and B's marriage to C), A is the mother of E's mother, which makes A the grandmother of E.
A: Mother's sister is an aunt, which is not the relation here. C: Father's mother is the paternal grandmother, whereas A is the maternal grandmother. D: Father's sister is a paternal aunt, which is incorrect.
B is correct because the expression chain A (+ mother of) B (- wife of) C (x father of) D (/ brother of) E reveals that A is the mother of B, and B is the mother of E; thus, A is the mother of E's mother (the mother's mother).
In blood relation problems with long chains, always draw a small family tree to avoid confusion between maternal and paternal sides.
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