Question : Directions: If A ÷ B means that A is the mother of B, A – B means that A is the father of B, and A + B means that A is the sister of B, then which of the following expressions shows that P is the mother of R?
Option 1: P + Q – R
Option 2: P ÷ Q + R
Option 3: P – R + Q
Option 4: Q + P – R
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Correct Answer: P ÷ Q + R
Solution :
Given:
A ÷ B means that A is the mother of B, A – B means that A is the father of B, and A + B means that A is the sister of B.
Let's check the options –
First option:
P + Q – R
The family tree will be –
Here, the quadrilateral represents the male, and the circular figure represents the female in the figure. So
, P is the aunt of R.
Second option:
P ÷ Q + R
The family tree will be –
Here, the quadrilateral represents the male, and the circular figure represents the female in the figure. So
, P is the mother of R.
Third option:
P – R + Q
The family tree will be –
Here, the quadrilateral represents the male, and the circular figure represents the female in the figure. So
, P is the father of R.
Fourth option:
Q + P – R
The family tree will be –
Here, the quadrilateral represents the male, and the circular figure represents the female in the figure. So
, P is the father of R.
Hence, the second option is correct.
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