Read the following statements and answer the given question-i P - Q means Q is the mother or P-ii P - Q means P is the brother of Q-iii P - Q means P is the sister of Q-iv P - Q means Q is the father of P- Which of the following statements is superfluous to check whether R is the grandson of K -A- ii onlyB- iv onlyC- i onlyD- NoneE- iii only

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Byju's Answer

Standard VI

Mathematics

Word Problems

Read the foll...

Question

Read the following statements and answer the given question.
i) $P \times Q$ means Q is the mother or P.
ii) $P + Q$ means P is the brother of Q.
iii) $P - Q$ means P is the sister of Q.
iv) $P \div Q$ means Q is the father of P.
Which of the following statements is superfluous to check whether R is the grandson of K?

None

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(i) only

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(ii) only

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(iii) only

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(iv) only

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Solution

The correct option is D (iii) only
We can determine the given relation by using the following relationship:
$R + M \times T \div K$
$R + M \Rightarrow$ R is the brother of M.
$M \times T \Rightarrow$ T is the mother of M.
Therefore, T is the mother of M and R.
$T \div K \Rightarrow$ K is the father of T.
Thus, R is the grandson of K.
Therefore, the statement (iii) is superfluous.

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Read the following statements and answer the given question. i) P×Q means Q is the mother or P. ii) P+Q means P is the brother of Q. iii) P−Q means P is the sister of Q. iv) P÷Q means Q is the father of P. Which of the following statements is superfluous to check whether R is the grandson of K?