Why is a river so rich ?

Which country gets ill every time?

He loves to dance, twist and prance, he shakes his tail, and as a way he sails, wingless he flies into the sky. What is he?

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

A man walked into a pub and went straight towards the Barman. He asked for a dirty martini from the Barman. The Barman thought something and then pulled out a pistol from his drawer and aimed it directly at the man. Why did he do that?

A man has a barrel filled with oil that weighs 100 pounds, and then he puts something into it. Now the barrel weighs less than 100 pounds. What did he put in the barrel?

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

How can you drop a raw egg from a height onto a concrete floor without cracking it?

Who is that with a neck and no head, two arms and no hands? What is it?

The measurement of time, That can't be found on a clock, But can be looked upon on a map.

Who is He ?