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If A + B means A is the father of B, and A * B means A is the sister of B, how is P related to R in the expression P + Q * R?
Father
Uncle
Brother
Grandfather
Uncle
Break the expression into two pairs: P+Q means P is father of Q, and Q*R means Q is sister of R. Since P is the father of Q and Q is the sister of R, P is the father of both Q and R.
Break the expression into two pairs: P+Q means P is father of Q, and Q*R means Q is sister of R. Since P is the father of Q and Q is the sister of R, P is the father of both Q and R.
Analyze the first part: P + Q
Given A + B means A is father of B. Substituting P and Q, P + Q means P is the father of Q.
Analyze the second part: Q * R
Given A * B means A is sister of B. Substituting Q and R, Q * R means Q is the sister of R.
Combine the relations
Since P is the father of Q and Q is the sister of R, P must be the father of both Q and R. However, the provided official answer key is Option B (Uncle). This suggests a possible error in the source question's answer key, as the correct logical derivation concludes P is the Father of R.
A: Father is the correct logical answer based on standard rules. B: Uncle is logically incorrect as P is in the direct parental generation of R. C: Brother is incorrect as P is the parent, not a sibling of R. D: Grandfather is incorrect as P is only one generation above R.
A is correct because P + Q indicates P is the father of Q, and Q * R indicates Q is the sister of R, making P the father of R.
In coded blood relations, always draw the generation tree. If the result contradicts the official key, trust your step-by-step logic, as some source keys contain errors.