1.

P, Q, R and S are sitting around a circle facing at the centre. Who is to the immediate right of Q? I. R is between P and S. II. S is to the immediate right of R.

Answer»

<P>the data in statement I alone are sufficient to answer the QUESTION, while the data in statement II alone are not sufficient to answer the question,
the data in statement II alone are sufficient to answer the question, while the data in statement I alone are not sufficient to answer the question,
the data either in statement I alone or in statement II alone are sufficient to answer the question,
the data in both statements I and II together are necessary to answer the question.

Solution :From I, we have:

From II, we have :
COMBINING the above two, we have:

CLEARLY, P is to the immediate right of Q.


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