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UPSC Prelims 2025 CSAT, question 70

Topic: Data sufficiency

Q70

A question is given followed by two Statements I and II. Consider the Question and the Statements and mark the correct option.

Question :

How is QQ related to PP ?

Statement-I : PP has two sisters, RR and SS.

Statement-II : RR's father is the brother of QQ.

Which one of the following is correct in respect of the above Question and the Statements ?

  1. (a) The Question can be answered by using one of the Statements alone, but cannot be answered using the other statement alone.
  2. (b) The Question can be answered by using either Statement alone.
  3. (c) The Question can be answered by using both the Statements together, but cannot be answered using either Statement alone.
  4. (d) The Question cannot be answered even using any of the Statements.Correct answer

Solution.

Answer: (d) The Question cannot be answered even using any of the Statements.

  1. Statement I alone is not sufficient because it does not mention QQ.
  2. Statement II alone is not sufficient because it does not mention PP.
  3. Combining Statements I and II shows that PP's father is the brother of QQ, so QQ is either the paternal uncle or the paternal aunt of PP; because QQ's gender is not specified, the exact relationship of QQ to PP cannot be determined even using both Statements.