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If A + B means A is the brother of B; A - B means A is the sister of B and A x B means A is the father of B. Which of the following means that C is the son of M?

  • A.M - N x C + F
  • B.F - C + N x M
  • C.N + M - F x C
  • D.M x N - C + F

Answer: D

Correct answer: M x N - C + F

M × N makes M the father of N; N – C makes N the sister of C, so C is M’s child too; and C + F makes C the brother of F, which shows C is male. A male child of M is his son.

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