M × N' means 'M is the mother of N'
'M + N' means 'M is the father of N'
'M ÷ N' means 'M is the sister of N'
'M - N' means 'M is the brother of N'
How is X related to Y in the expression X ÷ Z - A × Y?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. Mother's sister
X ÷ Z: X is the sister of Z
Z - A: Z is the brother of A
A × Y: A is the mother of Y
(In above diagram, circle represents female, square represents male, single line means siblings, vertical line shows generational gap.)
Hence, X is the mother's sister of Y