B means A is the daughter of B
A # B means A is the brother of B
A * B means A is the mother of B

Which of the following shows that Y is the mother of X?
(a) Y # Z * X
(b) X # Z & Y
(c) X * Y # Z
(d) None of these

Question

B means A is the daughter of B
A # B means A is the brother of B
A * B means A is the mother of B

Which of the following shows that Y is the mother of X?
(a) Y # Z * X
(b) X # Z & Y
(c) X * Y # Z
(d) None of these

ONLiNE UPSC · Accepted Answer

Check each option:
(a) Y # Z * X &rarr; Y is brother of Z (&rarr; male), Z is mother of X &rArr; Y is uncle
(b) X # Z & Y &rarr; X is brother of Z; Z is daughter of Y &rArr; X is son of Y
(c) X * Y # Z &rarr; X is mother of Y; Y is brother of Z &rArr; X is their mother
Y is child, not parent
All wrong.

Hence, option d is correct.

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M Question 1	⏱ 0
B means A is the daughter of B A # B means A is the brother of B A * B means A is the mother of B Which of the following shows that Y is the mother of X? (a) Y # Z * X (b) X # Z & Y (c) X * Y # Z (d) None of these