What occurs twice in a week, once in a year but never in a day?

A thief enters a store and threatens the clerk, forcing her to open the safe. The clerk says, “The code for the safe is different every day, and if you hurt me you’ll never get the code.” But the thief manages to guess the code on his own. How did he do it?

"That Restaurant always remains crowded. This is the reason why nobody goes there".

Can you find a flaw in this statement?

An explorer goes on an exposition in the jungle. He sets up camp in the middle of the jungle. The next morning he sees something with a head and a tail, but he is not afraid. What did he see in his bag?

What number do you get when you multiply all of the numbers on a telephone's number pad?

I start and end with 500 and carry a 5 in my heart. But I require the first letter and the first number to be complete. I am the name of a King.

Who am I ?

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

I noticed one of the words in the oxford dictionary is spelled incorrectly. What about you?

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

Can you place six matchsticks in a manner that each of the matchsticks is in touch with the other five matchsticks?