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?

I come in different shapes and sizes.
Parts of me are curved, other parts are straight.
You can put me anywhere you like,
but there is only one right place for me.
What am I?

How many triangles can you find in this given picture?

What number divided by 4 is the same as that number minus 4?

A bomb goes off.
Carnage.
One person, only a few feet away, survives! How can this be?

You have two strings whose only known property is that when you light one end of either string it takes exactly one hour to burn. The rate at which the strings will burn is completely random and each string is different. How do you measure 45 minutes?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

What do you think with the below Picture ?

I have an eye but still cannot see.

Who am I?

Three brothers Jacob, John, and James live in Mexico City. The product of the ages of these brothers is 175. Jacob and John are twins. How old is James?