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If A # B means 'A is mother of B', A + B means 'A is daughter of B', A ÷ B means 'A is wife of B', and A @ B means 'A is father of B', what is the relation of X to Y in 'X + Z @ W # Y'?
Sister
Mother
Aunt
Daughter
Sister
Quick Trick: Break down the expression into pairs (X+Z), (Z@W), (W#Y) and map the gender/relation flow using a family tree structure.
Break down the expression into pairs (X+Z), (Z@W), (W#Y) and map the gender/relation flow using a family tree structure.
Analyze X + Z
X + Z means X is daughter of Z. Thus, Z is the parent of X, and X is female.
Analyze Z @ W
Z @ W means Z is father of W. Since Z is the father of both X and W, X and W are siblings.
Analyze W # Y
W # Y means W is mother of Y. Since X is the sister of W, X is the aunt of Y.
B: Incorrect, as X is the same generation as the mother W (aunt), not the mother. C: Correct, X is the aunt of Y. D: Incorrect, X is the sister of W (mother of Y), not the child of Y or W.
C is correct because the breakdown shows X is the sister of W, and W is the mother of Y, making X the maternal aunt of Y.
In coded blood relations, always determine gender first if possible to eliminate opposite-gender options immediately.