What is full of holes but still holds water?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

An equation has been laid down using a few matchsticks. However, as you can see, the equation is not correct. Can you correct the equation if you are allowed to add or remove 5 matchsticks?

If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?

There are 3 apples in the basket and you take away 2. How many apples do you have now?

Can you make the number 24 by utilizing the numbers 1, 3, 4 and 6? You must use one number only one time and you can use mathematical operation symbols anytime anywhere.

Things are just as they seem, right? Well, check again.
Can you count the number of tigers in this picture ?

Prove that twice of ten is the same as twice of eleven.

A bus driver was heading down a street in Mexico. He went right past a stop sign without stopping, he turned left where there was a "no left turn" sign, and he went the wrong way on a one-way street. Then he went on the left side of the road past a cop car. Still - he didn't break any traffic laws. Why not?

Why did Navjot Singh Sidhu put the new January calendar in the freezer