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In a certain code language, ‘A + B’ means ‘A is the father of B’, ‘A − B’ means ‘A is the mother of B’, ‘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 husband of B’. How is T related to R if ‘P ÷ R + Q × S − T * U’?
Daughter’s son
Daughter’s daughter
Son’s daughter
Son’s son
Daughter’s son
Focus on the gender of T first; since T*U means T is the husband of U, T must be male, which eliminates female-only options.
Focus on the gender of T first; since T*U means T is the husband of U, T must be male, which eliminates female-only options.
Analyze the expression P ÷ R + Q × S − T * U
Break down the relations: P is sister of R, R is father of Q, Q is brother of S, S is mother of T, T is husband of U.
Construct the generation hierarchy
P and R are in generation 1. Q, S, and T are in generation 2 (children of R). T is in generation 3 (child of S, grandchild of R).
Determine the relation
Since R is the parent of S, and S is the mother of T, R is the grandparent of T. As T is male (husband of U), T is the son of R's daughter (S), making T the daughter's son.
B is incorrect because T is male, not a daughter. C is incorrect because T is the son of R's child S, not a direct son. D is incorrect because R's daughter S is the mother, making T a daughter's son, not a son's son.
A is correct because T is the son of S, who is the daughter of R, making T the daughter's son of R.
In coded blood relations, always draw the family tree starting from the first person to visualize the generation gap clearly.
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