How many sides does a circle have?

How many times can you subtract the number two from the number fifty?

John was piloting a plane behind a car but was never able to overtake it. Why?

I have four wings but can't fly.
I express no emotions.
I am found on the exact spot every time you look.
I keep toiling away with a little sound.

Do you know what am I?

I look flat, but I am deep. Hidden realms I shelter. Lives I take, but the food I offer. At times I am beautiful. I can be calm, angry, and turbulent. I have no heart but offer pleasure as well as death. No man can own me, yet I encompass what all men must have. What am I?

How can you take 2 from 5 and leave 4?

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

There are five vowels (a, e, i, o, u) in the English language.
Can you tell us a word that contains all these vowels?

You Throw The Outside, Cook The Inside
Eat The Outside, Throw The Inside.

What Is It?

O_er_t_o_

Complete the missing letters of the given word.