How many points are there on the globe where, by walking one mile south, then one mile east and then one mile north, you would reach the place where you started?

What came first, the chicken or the egg?

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?

Why do we preferably have round manhole covers and not square ones?

A mother is 21 years older than her child. In exactly 6 years from now, the mother will be exactly 5 times as old as the child.
Where's the father?

I make two people out of one. What am I?

A girl was standing near the window thinking something. All of a sudden she decides something and throws something out of the window. She dies very soon after throwing it. She was perfectly healthy and had no disease or allergy. No one killed her and she did not commit suicide.

Can you think of any possible explanation that is logical as well for what happened there?

Before the start of the car race, John and Jacob have the same amount of fuel in their car. With this fuel, John can drive for 4 hours while Jacob can drive five hours.
After a time they realize that the amount of fuel left in John's car is 1/4th of the fuel in Jacob's.

For how long they are racing?

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?