Question : Directions: If A ÷ B means that A is the brother of B, A × B means that A is the sister of B, and A – B means that A is the father of B then which of the following expressions shows that P is the father of R?
Option 1: P – Q × R
Option 2: P × Q – R
Option 3: P ÷ Q × R
Option 4: P – Q – R
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Correct Answer: P – Q × R
Solution : Let's check the options – First 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 father 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 aunt 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 brother of R. Fourth 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 grandfather of R.
So, only the expression in the first option satisfies the relation given in the question. Hence, the first option is correct.
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