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Solutions
We can make a table in the following manner and then fill it according to the given information.

We know that the number of people living below W is one more than the number of people living below him. Hence W must be on the 5th floor. It is also given that 3 people live between U and W. Hence U can only be at the first floor. There are 2 people between P and V and V is the only person between Q and R. So V can be 2nd or 7th. However if V is 7th then P will not have any place since it has been given that P lives on a floor higher that V. Hence V must be 2nd and P must be 6th.This implies that S must be 8th and T must be 7th. Since there are 3 people between S and Q, so Q must be 4th and R must be 2nd. Thus, we will have the following arrangement
