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

On a bus, there is a 26-year-old pregnant lady.
A 30-year-old policeman.
A 52-year-old random woman.
And the 65-year-old driver.

Who is the youngest?

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?

I can be cracked, made, told, and played. What am I?

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

The barber of Town shaves all men living in the town. No man living in the town is allowed to shave himself. The barber lives in that town. Who then shaves the barber of the town?

Do you know who was buried in John's tomb?

What type of tree can I carry in my hand?

What seven-letter word has hundreds of letters in it?