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

Why is the longest human nose just 11 inches?

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 can you see in the middle of March and April that you can never see in any other month?

What has one eye, but can’t see?

What has a ring but no finger?

John left on a horse on Thursday , was gone for two days, and came back on Thursday after completing his work. How did that happen?

What has a bottom at the top?

Different lights make me strange by changing me into different sizes. What am I?

A man was driving a black truck. His lights were not on. The moon was not out. A lady was crossing the street. How did the man see her?