Question
How many floor gaps are between the floors of B and Z,
as per the given information? Study the following information carefully to answer the given question: Nine persons i.e. A, Z, B, Y, C, N, M, Q and J live on a separate floor of a nine floored building but not necessarily in the same order. The ground floor is numbered as 1, the first floor is numbered as 2 and so on until the topmost floor is numbered as 9. A does not live on the odd numbered floor and doesn’t live just below of the top floor. There are two persons live between A and N, who lives above of the floor in which A lives. Z lives just above of the floor of Q. B lives just below of the floor of J. There are three persons live between N and M, who lives just above the floor of Y. Both B and Q do not live on ground floor. Q lives below of the floor of Y but not just below. The number of persons between J and M is same as between C and Y.Solution
A does not live on the odd numbered floor and doesn’t live just below of the top floor. We get three possibilities here i.e. Case 1, Case 2 and Case 3. There are two floors gap between A and N, who lives above of the floor in which A lives. There are three persons live between N and M, who lives just above the floor of Y. 
From the given statements, Q lives below of the floor of Y but not just below. Here Case 2 is ruled out. Both B and Q do not live on ground floor. Z lives just above of the floor of Q. B lives just below of the floor of J. Here, one more case is added i.e. Case 1a. 
From the given statements, the number of floors gap between J and M is same as between C and Y. Now Case 1 and Case 1a are eliminated here. So, the final arrangement is such as- 
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