P, Q, R, S, T and U live on six different floors of the same building. The ground floor is numbered 1, the one above it is numbered 2, and so on till the topmost floor is numbered 6. Exactly three persons live between the floors on which R and Q live. T lives immediately above the floor on which P lives. U lives immediately above the floor on which Q lives. R lives immediately below the floor on which S lives. T lives on floor number 4. Who lives on floor number 6?

A, B, E, F, Y and Z live on six different floors of the same building. The lowermost floor in the building is numbered 1, the floor above it is numbered 2 and so on till the topmost floor, which is numbered 6. Only one person lives above A. Only F lives below B. Y lives on an even-numbered floor. E lives on a floor above A. How many people live below Z?

P, Q, R, U, X, and Z live on six different floors of the same building. The lowermost floor is numbered 1, the floor above it is 2, and so on up to the topmost floor numbered 6. Only two people live between P and R. Only two people live between Q and Z. Only one person lives between U and Z. U lives on floor number 1. P lives above Z. How many people live above X?