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?

During an experiment, a guy throws a bouncy ball from a 100 feet tall building. The ball has a specific characteristic. Every time it hits the ground, it bounces up halfway.

How many bounces do you think the ball will make before it comes to a stop ?

What has a bottom at the top?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

What seven-letter word has hundreds of letters in it?

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

What begins with T, ends with T, and has T in it?

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

John, Jack and Jill are in a desert. John doesn't like Jill and hence decides to murder him. He poisons the water supply of Jill. Since it is a desert area, Jill must drink or he will die of thirst.

Jack does not know of the actions of John and also decides to murder Jill. To succeed in his ill motives, he removes the water supply of Jill so he dies of thirst.

Jill dies due to thirst. Who murdered Jill?

Which tank will fill first?