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CA Foundation · Quantitative Aptitude · Blood Relations

In a certain code, 'A + B' means 'A is the father of B', 'A - B' means 'A is the wife of B', and 'A = B' means 'A is the sister of B'. If 'P + Q = R - S', how is S related to P?

S is the son-in-law of P. P is the father of Q, Q is the sister of R, so R is P's daughter. R is the wife of S, which makes S the husband of P's daughter, i.e. his son-in-law.

  1. ASon-in-lawCorrect
  2. BBrother-in-law
  3. CSon
  4. DFather-in-law

Explanation

P + Q: P is the father of Q. Q = R: Q is the sister of R, so R is P's child, and R is a female because R - S means R is the wife of S. Hence S is the husband of P's daughter R, so S is P's son-in-law. Son would ignore that R is S's wife.

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