Question
Who among the following person doesn’t form a group?
Answer the questions based on the information given below. There are  12 people M, N, O, P, Q, R, S, T, U, V, W and X  who stay on  6 floors  (numbered 1 to 6) of a building but not necessarily in the same order. There are  two flats on each of the six floors.  The  flats are numbered as 1 and 2  on each of the floors and are from  left to right.  Flat no. 1 of the floor no. 2 is exactly above the flat no. 1 of the floor no. 1 and so on. Q and T stay on the same floor above the floor on which O stays, but not immediately above. There are only three floors between T and V, both stay on flat no. 2. O stays just below W and both stays on flat no. 1. O does not stay on even numbered floor. N stays on immediately above P and both stays on the same flat number. P stays on even numbered floor. S stays on the topmost floor. Only three floors between S and M, both stays on a different flat number. X stays below R, both stay in different flat number. There is more than one floor between X and R.Solution
Q and T stay on the same floor above the floor on which O stays, but not immediately above. S stays on the topmost floor. There are only three floors between T and V, both stay on flat no. 2. O stays just below WÂ and both stays on flat no. 1. O does not stay on even numbered floor. 
N stays on immediately above P and both stays on the same flat number. P stays on even numbered floor. 
Only three floors between S and M, both stays on m different flat number. From this condition case 2 is cancelled. X stays below R, both stay in different flat number. There is more than one floor between X and R. 
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