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CA Foundation · Quantitative Aptitude · Blood Relations

In a code, 'A ~ B' means 'A is the sister of B', 'A ^ B' means 'A is the brother of B' and 'A ! B' means 'A is the mother of B'. Which expression means 'X is the maternal uncle of Z'?

The expression X ^ Y ! Z is correct. It says X is the brother of Y and Y is the mother of Z. A mother's brother is the maternal uncle. The other expressions give an aunt, a mother or a brother.

  1. AX ~ Y ! Z
  2. BX ! Y ^ Z
  3. CY ! X ^ Z
  4. DX ^ Y ! ZCorrect

Explanation

A maternal uncle is the brother of one's mother. 'X ^ Y ! Z' says X is the brother of Y and Y is the mother of Z, so X is Z's maternal uncle. 'X ~ Y ! Z' makes X a maternal aunt. 'X ! Y ^ Z' makes X the mother of Z. 'Y ! X ^ Z' makes X the brother of Z.

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