How many Floors are there in the building? 

Solution

There are Only 3 persons lives above J. Only four persons are living between J and K. Only Three persons are living between A and O who lives adjacent to K. More than two but less than five persons are living between O and R.A lives adjacent to R. Three persons are living between A and the one who likes Banana fruit. The one who like apple fruit lives immediately below the one who likes Banana fruit. Two persons are living between L and the one who like Apple fruit. R is not adjacent to L. Not more than ten person lives between L and K.O doesn’t like Banana fruit. Case 1 (A), 2 A(2), CASE 2 (B) 1 are invalid because O doesn’t have banana fruit.  In case 2(A) 1 there is no place for L. hence this case is also invalid.  In case 2 (B) II is also invalid because Not more than ten person lives between L and K but in this case more than ten persons are between L and K. Therefore the final arrangement is