CA Foundation · Quantitative Aptitude · Blood Relations
In a code, 'A + B' means 'A is the father of B', 'A - B' means 'A is the mother of B', 'A × B' means 'A is the brother of B' and 'A ÷ B' means 'A is the sister of B'. Which expression means 'M is the maternal uncle of T'?
The expression M × S - T is correct. A maternal uncle is the mother's brother, so S must be T's mother, written S - T, and M must be S's brother, written M × S. Combining them gives M × S - T.
- AM × S - TCorrect
- BM ÷ S - T
- CM × S + T
- DM + S - T
Explanation
A maternal uncle is the mother's brother. We need S to be T's mother (S - T) and M to be S's brother (M × S). This gives M × S - T. M ÷ S - T makes M the maternal aunt. M × S + T makes M the paternal uncle. M + S - T makes M the maternal grandfather.
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