What's the only room from which no one can enter or leave

How many times do a clock's hands overlap in a day ?

Most people think of me as money. But when they find me in the water, they won’t get any money out of me. What am I?

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?

Prove that the below maths equation is true.

8 + 8 = 91

Can you find out the total number of triangles in the given figure?

What does does this rebus picture means ?

How many minutes are there in Feb 2017?

Note: The shortest answer is the correct answer.

The host of a game show, offers the guest a choice of three doors. Behind one is a expensive car, but behind the other two are goats.
After you have chosen one door, he reveals one of the other two doors behind which is a goat (he wouldn't reveal a car).

Now he gives you the chance to switch to the other unrevealed door or stay at your initial choice. You will then get what is behind that door.

You cannot hear the goats from behind the doors, or in any way know which door has the prize.

Should you stay, or switch, or doesn't it matter?

An office is divided into 8 cubicles. How many of the cubicles are painted if only 1/8 of the cubicles are painted?