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?

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

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

If it took eight men ten hours to build a wall, how long would it take four men to build it?

He runs but never walks. Murmurs, but never talks. Has a bed, but never sleeps. And has a mouth, but never eats?

Which flower has two lips?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

On the dull night when the blonde was dozing, she heard an odd clamour and she saw that there was a bizarre man with a gun simply outside her home. So she raced to the telephone to call the police, however, she can't dial 911. Why?

I know a country, If you remove the last alphabet of its name, it will become a part of your body. Do you name it?

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?