A man is lying dead in a field where no one is around. His head is split open and his legs are disfigured. Near to him, there is an unopened package. No living organism can be found anywhere at the crime scene.

How did he die?

In a science lab, a petri dish hosts a healthy colony of yeast for an experiment. Now every minute, all the yeast cells divide into two. At noon, there was just a single cell of yeast and at 1:22, the Petri dish was half full. Can you calculate when the dish will be full of yeast?

Below, you will find the mathematical proof that 10 equals 9.99999?. But is that possible or there is something wrong about it? Can you find the error?

x = 9.999999...
10x = 99.999999...
10x - x = 90
9x = 90
x = 10

Replace the question mark with the correct number.

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

13 decks of cards have been mixed. What is the minimum number of cards that must be taken out from the above-mixed cards to guarantee at least one 'four of a kind?

I know a nine-letter word having only one vowel.
Do you ?

Can you solve the tricky chess rebus puzzle below by ciphering the hidden meaning?

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?

Most people think of me as money. But when they find me in the water, they won’t get any money out of me. What am I?