Question
Who lives in flat 1 of the bottommost
floor? Answer the questions based on the information given below. 12 persons M-X live in a building, which consists of four floors such that the bottommost floor is numbered 1 and the topmost floor is numbered 4. Each floor has three types of flats (Flat 1, flat 2 and flat 3) such that flat 1 is to the west of flat 2, which is to the west of flat 3. Flat 3 of floor 4 is immediately above flat 3 of floor 3, Similarly, flat 2 of floor 4 is immediately above flat 2 of floor 3 and so on. Only one person lives in each flat. Each of the flat is of equal dimension. M lives in flat 2 on an odd numbered floor. Q lives above M in the same type of flat and to the east of R. R doesn’t live on floor 3. O and T live in the same type of flat such that O lives immediately above T but below floor 3. O lives in south east of R. V lives to the west of O. V and S live in the same type of flat and V lives immediately above S. S doesn’t live in flat 1. N and U live in the same type of flat such that N lives immediately above U but not in flat 1. Floor number on which X lives is higher than P, whose floor number is higher than W.Solution
1. M lives in flat 2 on odd numbered floor. 2. Q lives above M in the same type of flat and to the east of R. 3. R doesn’t live on floor 3. So, M lives on flat 2 of floor 3 or flat 2 of floor 1. Case U: M lives on flat 2 of floor 3: 
4. O and T live in the same type of flat such that O lives immediately above T but below floor 3. 5. O lives in southeast of R. 6. V lives to the west of O. V and S live in the same type of flat and V lives immediately above S, this is not possible in case II(b), so case II(b) is rejected. 7. S doesn’t live in flat 1, so case II(a) is rejected. So, V lives in flat 2 of floor 2 and S lives in flat 2 of floor 1. O and T lives in flat 3. 
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