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?

How many sides does a circle have?

In one of the popular batman series movie "Batman Forever", there was a riddle that goes like "Tear me off and then scratch my head and I was red then and now I am back. Who am I?

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

Identify the hidden meaning behind this picture?

In the attached figure, you can see a chessboard and two rooks placed on the chess board. What you have to find is the number of squares that do not contain the rooks. How many are there?

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

The more it dries, the wetter it becomes. Can you tell what it is?

Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211