What can you catch but never throw?

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?

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

Name a key which is hardest to turn.

What number comes next in the series?

5 15 5 18 5 24 14 20 _

Which letter of the alphabet has the most water?

Where do fish keep their money?

Outside a massage parlour, there is a board that reads
"I only massage those who do not massage themselves."

Reading the above statement, does the masseur massage himself?

You Throw The Outside, Cook The Inside
Eat The Outside, Throw The Inside.

What Is It?

You are playing a game with your friend Jack. There are digits from 1 to 9. You both will take turn erasing one digit and adding it to your score. The first one to score 15 points will win the game.

Would you want to play first or second?

PS: The sum should be exactly 15.