If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

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?

Take number 1000 and then add 20 to it.
Now add 1000 one more time.
Now add 30.
Now add 1000 one more time.
Now add 40.
Now add 1000 one more time.
Now add 10.

What is the total?

How can a man go eight days without sleep?

By moving exactly three matchsticks can you make the below equation true.It can be solved by 3 ways.

What is the next shape from answers A, B, C, and D figure?

How can one talk without saying a single word?

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?

What goes through cities and fields, but never moves?

Which tank will fill first?