What you cannot hold but it is yours?

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

Akbar called Birbal and asked him to draw a line on the floor. He asked Birbal to make that line smaller without erasing it. Birbal smiled and did it before Akbar could blink his eyes.

How did he managed to do it?

Which Number is the odd one out?

A) 7145
B) 2716
C) 5321
D) 4135

The picture shows the dice results in each couple of throws. If they are actually following a pattern, can you find out the missing one?

Count the squares in the matchstick puzzle below?

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?

What is at the end of a rainbow?

Can you make a six-letter word using the letters N, A and B ?

It can be easily calculated that the digits 0 to 9 can be arranged into 3628800 distinct ten-digit numbers.

But do you know how many of these numbers are prime?