How many sides does a circle have?

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

I’m light as a feather, yet the strongest person can’t hold me for five minutes. What am I?

What is more useful when it is broken?

If you say my name, I will no longer exist. What am I?

How many letters are in the alphabet?

Pronounced as one letter,
And written with three,
Two letters there are,
And two only in me.
I am double, I am single,
I am black blue and grey,
I am read from both ends,
And the same either way.

If a wheel has 54 spokes, how many spaces are there between the spokes?

This is a most unusual paragraph. How quickly can you find out what is so unusual about it? It looks so ordinary, you'd think nothing was wrong with it. Actually, nothing IS wrong with it. But it is not as ordinary as you might think. If you think about it for a bit, you will find out why it is truly so unusual. So what is it? What is so unordinary about this paragraph?

Can you write down eight eights so that they add up to one thousand?