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

Complete the series by replacing "?" with the correct number.

ST ND RD TH '?'

A man looks at a painting in a museum and says, “Brothers and sisters I have none, but that man’s father is my father’s son.” Who is in the painting?

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 kind of storm is always in a rush?

A King wants to send the diamond ring to his girlfriend securely. He got multiple locks and their corresponding keys. His girlfriend does not have any keys to these locks and if he sends the key without a lock, the key can be copied in the way. How can King send the ring to his girlfriend securely?

I can write cow in 13 letters.

Can You?

When is the top of a mountain similar to a savings account?

Can you solve this picture maths equation?

There is a basket full of hats. Three are white and two are black. Three men, Tom, Tim, and Jim, each take a hat out of the basket and put it on their heads without seeing the hat they selected or the hats the other men selected. The men arrange themselves so Tom can see Tim and Jim’s hats, Tim can see Jim’s hat, and Jim can’t see anyone’s hat. Tom is asked what color his hat is and he says he doesn’t know. Tim is asked the same question, and he also doesn’t know. Finally, Jim is asked the question, and he does know. What colour is his hat?