Question
The question given below consists of two statements
numbered I and II given below it. You have to decide whether the data provided in the statements are sufficient to answer the question. Read all the statements and give an answer. Eight persons, P, Q, R, S, T, U, V and W, live on eight floors of a building, such that bottommost floor is numbered as 1 and the floor above it is numbered as 2 and so on. Who lives on seventh floor? Statement I: V lives two floors above U. Q lives three floors above T, who lives immediately above R. As many floors are below R as above S. Statement II: Only two persons live between W and U. P lives below U. W lives above sixth floor. P lives two floors above R.Solution
From statement I, V lives two floors above U. Q lives three floors above T, who lives immediately above R. As many floors are below R as above S. We get: 
So, from statement I alone, we get either W or P lives on 7th floor. So, statement I alone is not sufficient to answer the question. From statement II, Only two persons live between W and U. P lives below U. W lives above sixth floor. P lives two floors above R. We get: Case 1: 
Case 2: 
Case 3: 
So, from statement II alone, we get that it is not sufficient to answer the question. From Statement I and Statement II together, we get: Â 
So, W lives on seventh floor. Therefore data given in both statement I and II together are sufficient to answer the question.
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