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In a certain code language, ‘A + B’ means ‘A is the son of B’, ‘A @ B’ means ‘A is the sister of B’, ‘A # B’ means ‘A is the wife of B’ and ‘A ÷B’ means ‘A is the father of B’. How is X related to Z if ‘X # Y + W ÷V@ Z’?
Sister-in-law
Mother-in-law
Sister
Daughter
Sister-in-law
Break the expression into segments (X#Y, Y+W, W/V, V@Z) and draw a quick family tree starting from the right or left to establish connections between X and Z.
Break the expression into segments (X#Y, Y+W, W/V, V@Z) and draw a quick family tree starting from the right or left to establish connections between X and Z.
Analyze X # Y
X # Y means X is the wife of Y. So, Y is a male.
Analyze Y + W
Y + W means Y is the son of W. Since Y is a male (X's husband), W is the parent of Y.
Analyze W / V
W / V means W is the father of V. Since Y is also the son of W, Y and V are siblings.
Analyze V @ Z
V @ Z means V is the sister of Z. Thus, X is the wife of Y, and Y is the brother of V, and V is the sister of Z. Therefore, X is the wife of the brother of Z, making X the sister-in-law of Z.
B: Mother-in-law is incorrect as X is the wife of Y, and V/Z are Y's siblings. C: Sister is incorrect as X is connected by marriage, not blood. D: Daughter is incorrect as the generation gap does not support this relationship.
A is correct because X is the wife of Y, and Y is the brother of Z, which makes X the sister-in-law of Z.
In blood relation problems with multiple signs, always determine the gender of the central characters first to eliminate opposite-gender options quickly.