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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 sister of B’, and ‘A ÷ B’ means ‘A is the husband of B’. How is F related to Z if ‘D ÷ F × G ÷ H + N − Z’?
Mother’s sister
Husband’s sister
Sister
Father’s sister
Father’s sister
Break the expression into individual relations and trace the lineage downwards from the starting character F towards the target Z.
Break the expression into individual relations and trace the lineage downwards from the starting character F towards the target Z.
Analyze the expression D ÷ F × G ÷ H + N − Z
Break down the chain: D is the husband of F. F is the sister of G. G is the husband of H. H is the mother of N. N is the brother of Z.
Establish the lineage
Since N and Z are children of H, and G is the husband of H, G is the father of N and Z. F is the sister of G.
Determine the relation of F to Z
F is the sister of Z's father (G). Therefore, F is the father's sister (aunt) of Z.
A: Mother's sister is the maternal aunt, not the paternal relation found here. B: Husband's sister is a sister-in-law, not applicable to the biological lineage identified. C: F is the aunt, not the direct sister of Z.
D is correct because F is the sister of G, and since G is the father of Z, F is the father's sister of Z.
When solving complex coded blood relations, always draw a small rough sketch of the gender symbols (plus for male, minus for female) to avoid confusion during long chains.
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