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?

John was driving a bus and got stuck when passing through an underpass. Then came Jacob with a needle and got the bus out of the underpass.

What did the boy do?

A maths symbol is hidden in the below Bar Graph. Can you decipher it?

What has a ring but no finger?

Solve the puzzle by telling what does below picture means.

You need to climb ten stairs. At every stair, you can either take one step up or you can jump two steps up.

In how many different ways you can climb 10 stairs?

What is the longest word in the dictionary?

A man dies of old age on his 25 birthday. How is this possible?

Can you find out which number multiplied by itself will give the output as 12345678987654321?

What's the only room from which no one can enter or leave