Why are all black people so quick ?

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

Can you find the thief by just looking at the picture below?

I am five letter word that is under you.
If you remove my 1st letter, then I am over you.
If you remove my 1st and 2nd letters then I am all around you.

Who am I?

A man in a car saw a Golden Door, Silver Door and a Bronze Door. What door did he open first?

I have a head like a cat and feet like a cat, but I am not a cat. What am I?

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

While sitting in the Car, John suddenly finds that one of the wheels was missing. John noticed that a killer is approaching towards him. John cannot get out of the car.

How will John escape?

Consider all the numbers between 1 and 1 million. Among all these numbers, there is something very special about the number 8 and the number 2202. What is it?

We have four gears with below features=> Both Gear A and D has 60 teeth=> Gear B has 40 teeth=> Gear C has 20 teeth=> Every two minutes, Gear B makes 25 full turns.What is the relative speed of Gear A and Gear B?