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    Question

    Six persons D, E, F, M, N and O live in a six storey

    building but not necessarily in the same order. The bottommost floor is numbered as 1st and the topmost floor is numbered as 6th. F lives two floors above N. M lives just below O. O lives on a prime numbered floor. E lives below F but above D. D doesn't live below M. Who lives on 4 th floor?
    A E Correct Answer Incorrect Answer
    B M Correct Answer Incorrect Answer
    C D Correct Answer Incorrect Answer
    D N Correct Answer Incorrect Answer
    E O Correct Answer Incorrect Answer

    Solution

    F lives two floors above N. M lives just below O. O lives on a prime numbered floor.

    We will have three cases, first, when O lives on 2 nd floor, second, when O lives on 3 rd floor and third when O lives on 5 th floor. Image

    E lives below F but above D. D doesn't live below M.

    Case 3 gets eliminated.

    In case 1, F lives on 6 th floor, E lives on 5 th floor.

    In case 2, E lives on 5 th floor and D lives on 1 st floor but this case will get discarded as D doesn't live below M.

    The final arrangement is as follows. Image

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