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Read the following information carefully to choose the most appropriate answer for the question.

'X+Y' means that 'X is sister of Y'.
'X÷Y' means that 'X is daughter-in-law of Y'.
'X*Y' means that 'X is husband of Y'.
'X−Y' means that 'X is wife of Y'.

Which of the following means A is the son of M ?

  • A.A÷U+J*M
  • B.A*U÷J*M
  • C.A−U÷J*M
  • D.A*U+J−M

Answer: B

The expression is A*U÷J*M.

Decode it link by link:

  • A*U: A is the husband of U.
  • U÷J: U is the daughter-in-law of J.
  • J*M: J is the husband of M.

U is the daughter-in-law of J and his wife M, and U's husband is A, so A is the son of J and M, and therefore the son of M.

The first and third options begin with A÷ or A−, which make A a daughter-in-law or a wife, so A would be female. In the last option, A is the husband of U, U is J's sister, and J is M's wife, which makes A the husband of M's wife's sister, not M's son.

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