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P + Q means P is the brother of Q; P - Q means P is the mother of Q and P * Q means P is the sister of Q. Which of the following means M is the maternal uncle of R ?

  • A.M + K + R
  • B.M - R + K
  • C.M + K - R
  • D. M + K * R

Answer: C

Correct answer: M + K - R

M + K makes M the brother of K, and K – R makes K the mother of R. M is therefore the brother of R’s mother - her maternal uncle.

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