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In a certain code language, A + B means ‘A is the sister of B’ A − B means ‘A is the brother of B’ A × B means ‘A is the wife of B’ A ÷ B means ‘A is the father of B’ Based on the above, how is S related to N if ‘S ÷ E + W × T − N’?
Brother's wife's father
Brother's father
Brother's wife's brother
Wife's father
Brother's wife's father
Break down the expression into individual relationship pairs from left to right: S is the father of E, E is the sister of W, W is the wife of T, and T is the brother of N.
Break down the expression into individual relationship pairs from left to right: S is the father of E, E is the sister of W, W is the wife of T, and T is the brother of N.
Analyze S ÷ E
S ÷ E means S is the father of E (S is male, E is the child).
Analyze E + W
E + W means E is the sister of W. Since S is the father of E, S is also the father of W.
Analyze W × T
W × T means W is the wife of T. S is the father-in-law of T.
Analyze T - N
T - N means T is the brother of N. Since W is the wife of T, and T is the brother of N, then N is the sibling of T. S is the father of W (T's wife), so S is the father of T's wife.
B: Brother's father would mean S is the parent of N's brother, but S is the father of W (T's wife), not N. C: Brother's wife's brother refers to N's brother's wife's brother, which is incorrect. D: Wife's father would be S's relationship to T, not N.
A is correct because S is the father of W, who is the wife of T, and since T is the brother of N, S is the father of T's wife, making S the brother's wife's father relative to N.
In coded blood relations, always draw the gender (+ for male, - for female) above the initials to avoid confusion during long expression chains.
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