Question
How many persons live below A (considering both types of
flats)? Answer the questions based on the information given below: Ten persons namely, A, P, C, Q, E, R, G, S, I and T live on 10 different flats of a 5 storey building, where the bottommost floor is 1 and the floor above is 2 and so on. There are 2 types of flats on each floor, flat Y and flat Z such that flat Y is in the west of flat Z. Flat Y of floor 1 is immediately below of flat Y of floor 2, which is immediately below of flat Y of floor 3 and so on, similarly for flat Z. P lives in flat Y. P and R live in the same type of flat. Two floors are there between the floors of P and R. R lives exactly in the west of G. P lives on the even numbered floor. I's floor is immediately above G's floor. I and E live in the same type of flat. There is one floor between the floors of I and E. Q's floor is just below S's floor. T lives above A. C doesn’t live in flat Z. S and T don't live in same type of flat.Solution
P live in flat Y of either floor 2 or floor4. I lives on a floor that is immediately above the floor of G. I and E live in the same type of flat. P and R lives in same flat. There is one floor between the floors of I and E.So,I lives in either flat Y or flat Z. Case1:When P lives on 2nd floor. G cannot be placed in this case, so this case is not possible. 
Q's floor is just below S's floor. Case2: When Plives on4th floor It means that E lives on 4th floor and since I and E live in the same type of flat, I lives in Flat-Z on 2nd floor. Thus Q lives in flat-Y on 2nd floor. 
T lives above A. C doesn’t live in flat Z. S and T don'tlivein sametype offlat. So, T must live in flat Z which implies that S lives in flat Y and thus C lives in flat Y and A lives in Flat Z on 3rdfloor. The final arrangement is as follows: 
Average run scored by a batsman in first ‘x’ matches is 42. In next 13 matches he scored runs with an average of 62 so that his overall average incr...
The average weight of 4 persons is 35 kg. The heaviest person’s weight is 24 kg more than the lightest person’s weight. If the average weight of the...
The average age of a group of 20 students is 40 years. Two persons of age 35 years and 30 years, left the group and 2 persons of age 40 years and 85 yea...
The average weight of 20 men is 60 kg and the average weight of 30 women is 50 kg. Find the average weight of all 50 persons together.
The average age of a group of 25 persons is found to be 30 years. Later it is found that age of two of the persons is calculated as 32 and 60 ins...
In a family of 10, the men eat on average 65 kg of food and women eat on an average 45 kg of food. The men and women are equal in number. A woman...
- The average marks of 55 students in a class were calculated as 72. However, there were errors in recording the marks of four students. The incorrect marks ...
The average number of balloons distributed among five kids is 9. If each kid received 1 balloon more than the kid before, then find the highest number o...
Average 20 numbers is ‘x’. If the average of first 12 numbers is 62.5 while average of last 5 numbers is 84.8 and 13th, 14th...
The average age of a group of eight children is 9 years. Two children, whose ages were 7 years more and 5 years more than the average age, left. Two new...
