Why is it very easy to weigh a fish?

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?

On a certain day, John celebrated his birthday. Two days later, his older twin brother Jacob celebrated his birthday.

Is this even possible? How can it be?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

What can go up a chimney down, but can’t go down a chimney up?

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?

The dirtier I get, the whiter I look. Who am I?

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?

Solve the riddle below:

If a Chicken says, 'All chickens are liars" is the chicken telling the truth?

It was a dark stormy night and a couple were in a car driving madly to a city. The car broke down and the husband had to go get help from someone who spoke his language. He was afraid to leave his wife alone in the car so he locked the car before leaving. When he came back, the car was in the same state as he had left it but his wife was dead, there was blood on the floor and there was a stranger in the car. What happened?