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?

Can you count the number of children in the picture below

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

Can you count the number of quadrilaterals in the picture below?

Which is faster, Heat or Cold ? Explain.

There are two guys standing face to face in a room. On a wall, there is a clock. One of those is a prophet. He tells the other guy that he will be stabbed in the back in five minutes.

Shocked to hear that, the other guy stares at the clock. Just after the five minutes, he is stabbed on the back. Can you tell what happened?

I have a head like a cat and feet like a cat, but I am not a cat. What am I?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

There is a five-letter word which has 3 consonants(all are same) and 2 different vowels.
Also, something wrong is associated with the word.

Can you name it?

Take one out and scratch my head, I am now black but once was red. What am I?