10 people came into a hotel with 9 rooms and each guest wanted his own room. The bellboy solved this problem.
He asked the tenth guest to wait for a little with the first guest in room number 1. So in the first room, there were two people. The bellboy took the third guest to room number 2, the fourth to number 3, ..., and the ninth guest to room number 8. Then he returned to room number 1 and took the tenth guest to room number 9, still vacant.
How can everybody have his own room?

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

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

When is the top of a mountain similar to a savings account?

A thief is convicted in Mexico. He gets the death penalty. The judge allows him to say the last sentence to determine how the penalty will be carried out. If the thief lies, he will be hanged, if he speaks the truth he will be beheaded. The thief tells the last sentence and to everybody's surprise some minutes later he is set free because the judge cannot determine his penalty. What did the thief say?

Find the hidden tiger in the given optical illusion ?

What is the largest number you can write with just 3 digits?

Solve the equation by replacing the alphabet with numbers.

MOM + MOM + NO = BOOK=

Find the smallest sentence with all the English alphabet.

Can you find out the remainder when 3^300 is divided by 5?