Question
What is the difference between the floor numbers of X
and Y? Study the following information carefully and answer the question given below: Eight persons X, Y, Z, B, C, D, H and U live in an eight storied building, one on each floor but not necessarily in the same order. The ground floor is numbered 1, and the floor above is numbered 2 and so on. Only two persons live below the floor on which H lives. Only one person lives between H and X. U lives on an odd numbered floor but not on floor number 7. Only two persons live between U and Y. Y does not live on the topmost floor. X does not live on the lowermost floor. B lives immediately below Z. Neither B nor C lives on floor number 6.Solution
Only two persons live below the floor on which H lives. Only one person lives between H and X. X does not live on the lowermost floor. Using the above information we can place X and H on the floor number 5 and 3 respectively. 
U lives on an odd numbered floor but not on floor number 7. Only two persons live between U and Y. Y does not live on the topmost floor. We can use the above information to place U and Y in the table as shown below. 
B lives immediately below Z. Neither B nor C lives on floor number 6. After using the above information we can place B, Z and C in the table and here we can see that there is only spot left on the table which will be filled by last remaining member i.e. D. 
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