How can a man go eight days without sleep?

What 5-letter word typed in all capital letters can be read the same upside down?

Considering the below equation:

V + II - VI = 10
IV - X + VIII = 20
IV - VII + VI = 30

Then, I + II + III = ?

What can jump higher than a building?

If you drop a 15 kg iron bar and a 5 kg bag of cotton from a height of 50 meters which will reach the ground first?

How many times can you subtract the number 5 from 25?

There are three boxes on a table. One of the box contains Gold and the other two are empty. A printed message contains in each box. One of the message is true and the other two are lies.

The first box says "The Gold is not here".

The Second box says "The Gold is not here".

The Third box says "The Gold is in the Second box".

Which box has the Gold?

Can you find the dog hidden in a group of pandas?

Solve below rebus puzzle?

10+10 and 11+11 can give you the same answer.

Explain how?