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?

How can a man go eight days without sleep?

We are a group of eight brothers. We consider the weak, yet we protect the king in every battle. If we move ahead, we never turn back. Who are we?

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

The following question it puts forth you:

25 - 55 + (85 + 65) = ?

Then, you are told that even though you might think it's wrong, the correct answer is actually 5!

Whats your reaction to it? How can this be true?

Can you place three balls such that the equation shown in the picture holds true?

Can you count the number of matches in the picture below ?

In The 1st month of this year(the year 2013), I noticed that the date 13-1-13 (13 January 2013) is special.

This date is special as:

Date * Month = Year.

Can you figure out which year of this century has a maximum number of such dates?

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?

A man has a barrel filled with oil that weighs 100 pounds, and then he puts something into it. Now the barrel weighs less than 100 pounds. What did he put in the barrel?