A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?

One absent-minded ancient philosopher forgot to wind up his only clock in the house. He had no radio, TV, telephone, internet, or any other means for telling time. So he travelled on foot to his friend's place a few miles down the straight desert road. He stayed at his friend's house for the night and when he came back home, he knew how to set his clock. How did he know?

A 3 digit number is such that it's unit digit is equal to the product of the other two digits which are prime. Also, the difference between it's reverse and itself is 396.

What is the sum of the three digits?

Can you make four (4) nines (9) equal 100?

Yesterday I fell from 30 feet high ladder but I don't get hurt. Why?

What number should come in place of the question mark below?

How many triangles can you find in this given picture?

Find the number of squares in the below-given picture.

In a stable, there are men and horses. In all, there are 22 heads and 72 feet. How many men and how many horses are in the stable

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?