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In a certain code language, ‘A + B’ means ‘A is the mother of B’, ‘A = B’ means ‘A is the brother of B’, ‘A × B’ means ‘A is the wife of B’ and ‘A > B’ means ‘A is the father of B’. How is P related to T if ‘P + Q × R > S = T’?
Father’s mother’s sister
Mother’s sister
Father’s mother
Mother’s mother
Mother’s mother
Break the expression into individual relations: P is mother of Q, Q is wife of R, R is father of S, S is brother of T. P is thus the grandmother of T through the mother's side.
Break the expression into individual relations: P is mother of Q, Q is wife of R, R is father of S, S is brother of T. P is thus the grandmother of T through the mother's side.
Analyze the expression P + Q × R > S = T
Break down the chain: 1. P + Q means P is the mother of Q. 2. Q × R means Q is the wife of R (P and Q are female, R is male). 3. R > S means R is the father of S. 4. S = T means S is the brother of T.
Establish the relationship between P and T
Since Q is the mother of S and T (because Q is the wife of their father R), and P is the mother of Q, P must be the mother of the mother of T. Therefore, P is the mother's mother (maternal grandmother) of T.
A: Father's mother's sister is incorrect because the lineage is through the maternal side (Q). B: Mother's sister is incorrect as P is two generations above T, not one. C: Father's mother is incorrect because the connection is established through Q, who is the mother of S and T.
D is correct because P is the mother of Q, and Q is the mother of T, making P the maternal grandmother (mother's mother) of T.
In coded blood relations, always draw a small family tree diagram or identify the gender of the subjects first to eliminate options quickly.
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