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If A + B means A is the father of B; A - B means A is the brother B; A % B means A is the wife of B and A x B means A is the mother of B, which of the following shows that M is the maternal grandmother of T?

  • A.M x N % S + T
  • B.M x N - S % T
  • C.M x S - N % .
  • D.M x N x S % T

Answer: A

Correct answer: M x N % S + T

M × N makes M the mother of N; N % S makes N the wife of S; S + T makes S the father of T. So N is T’s mother, and M is N’s mother - the mother of T’s mother, which is precisely the maternal grandmother.

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