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?

Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

A beggar on the street can make one cigarette out of every 6 cigarette butts he finds. After one whole day of searching and checking public ashtrays the beggar finds a total of 72 cigarette butts. How many cigarettes can he make and smoke from the butts he found?

The answer I give is yes, but what I mean is no. What was the question?

If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?

Can you solve the rebus below?

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

I’m tall when I’m young, and I’m short when I’m old. What am I?

Three brothers Jacob, John, and James live in Mexico City. The product of the ages of these brothers is 175. Jacob and John are twins. How old is James?

Which number comes next in the number series?

2, 9, 30, 93, ?