How many sides does a circle have?

What have one eye but still cannot see?

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

The more you take me, the more you leave me behind.
Who Am I?

I am a normal creature, but I have five hands. I can even have more but even then I will be considered normal.

Who am I?

I have a head like a cat and feet like a cat, but I am not a cat. What am I?

You knock a Table over in the library, and suddenly 20 eyes are looking at you.

What word begins and ends with an E, but has only one letter?

What is more useful when it is broken?

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.