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

It is always ahead of me yet I can never see it. What is it?

If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?

Consider this about a word: The first two letters signify a male, the first three letters signify a female, the first four letters signify a great, while the entire world signifies a great woman. What is the word?

What number divided by 4 is the same as that number minus 4?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

What is always in front of you but can’t be seen?

I come in different shapes and sizes.
Parts of me are curved, other parts are straight.
You can put me anywhere you like,
but there is only one right place for me.
What am I?

In a stable, there are men and horses. In all, there are 22 heads and 72 feet. How many men and how many horses are in the stable