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?

There is a bag which have 21 blue balls and 23 red balls. You also have 22 red balls outside the bag. Randomly remove two balls from the bag. * If they are of different colors, put the blue one back in the bag. * If they are the same colour, take them out and put a red ball back in the bag. Repeat this until only one ball remains in the bag. What is the color of the sole ball left in the bag ?

In the picture, you can see a chess board. On the top left position, the K marks a knight. Now, can you move the knight in a manner that after 63 moves, the knight has been placed at all the squares exactly once excluding the starting square?

What is the four-digit number in which the first digit is one-third the second, the third is the sum of the first two, and the last is three times the second?

Find the missing number in the sequence below:

A man was just doing his job when his suit was torn. Why did he die three minutes later?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

Solve the equation in the image by looking at the pattern closely.

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

A shepherd had 18 sheep, out of which, all but ten died.

Can you tell us how many sheep was he left with?