A man lives on the fifteenth floor of an apartment building. Every morning he takes the elevator down to the lobby and leaves the building. In the evening, he gets into the elevator, and, if there is someone else in the elevator, or if it was raining that day, he goes back to his floor directly. Otherwise, he goes to the tenth floor and walks up five flights of stairs to his apartment. Can you explain why he does this?

I don't get anymore wetter, no matter how much rain falls on me.

What do you answer even though it never asks you questions?

What does the below mathematical rebus mean?

f you were running a race, and you passed the person in 2nd place, what place would you be in now?

My cousin lives in one story house in Antarctica. His house is made the of-of sandstone. what is the color of stairs?

What English word has three consecutive double letters?

How do you go from 98 to 720 using just one letter?

What number should come in place of the question mark below?

Three ants are going up a hill, one behind the other. The last ant then says to the other ants, 'There is an ant behind me!'' How come?