UPSC CSE Prelims 2006 Q61 — Science & Technology PYQ with Answer

P, Q, R, S and T reside in a 5-storeyed (Ground + 4) building, and each of them resides on a separate floor. Further,

1. T does not reside on the topmost floor.

2. Q does not reside on the ground floor.

3. S resides on one storey above that of P and one storey below that of R.

To know as to which of the 5 persons resides on the ground floor

which of the above statements are sufficient / insufficient?