Question : Directions: If A ÷ B means that A is the father of B, A – B means that A is the mother of B, and A + B means that A is the brother of B then which of the following expressions shows that P is the mother of R?
Option 1: Q – P + R
Option 2: P – Q + R
Option 3: P – Q ÷ R
Option 4: R + P – Q
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Correct Answer: P – Q + R
Solution :
Let's check the given options –
First option:
Q – P + R
According to the given expression, the family tree will be as follows –
Here, the quadrilateral represents the male, and the circular figure represents the female in the figure. From the above family tree, it is evident that P is the brother of R.
Second option:
P – Q + R
According to the given expression, the family tree will be as follows –
Here, the quadrilateral represents the male, and the circular figure represents the female in the figure. From the above family tree, it is evident that P is the mother of R.
Third option:
P – Q ÷ R
According to the given expression, the family tree will be as follows –
Here, the quadrilateral represents the male, and the circular figure represents the female in the figure. From the above family tree, it is evident that P is the paternal grandmother of R.
Fourth option:
R + P – Q
According to the given expression, the family tree will be as follows –
Here, the quadrilateral represents the male, and the circular figure represents the female in the figure. From the above family tree, it is evident that P is the sister of R.
So, only the expression in the second option satisfies the relation given in the question. Hence, the second option is correct.
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