There was once a college that offered a class on probability applied to the real world. The class was relatively easy, but there was a catch. There were no homework assignments or tests, but there was a final exam that would have only one question on it. When everyone received the test paper it was a blank sheet of paper with a solitary question on it: 'What is the risk?'.Most students were able to pass, but only one student received 100% for the class! Even stranger was that he only wrote down one word!
What did he write?

What is the difference between a jeweller and a jailer?

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

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

Bay of Bengal is in which state?

Why is Saturday stronger than Monday?

A boy was at a carnival and went to a booth where a man said to the boy, "If I write your exact weight on this piece of paper then you have to give me $50, but if I cannot, I will pay you $50." The boy looked around and saw no scale so he agrees, thinking no matter what the carny writes he'll just say he weighs more or less. In the end the boy ended up paying the man $50. How did the man win the bet?

What has many teeth, but cannot bite?

Why is a river so rich ?

Teacher ask the student

'Why are you standing on that chair in music class ?'.

what did student replied ?