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.

Can you find the missing piece of the Porsche?

I’m orange, I wear a green hat and I sound like a parrot. What am I?

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

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

Twice ten are six of us,

Six are but three of us,

Nine are but four of us;

What can we possibly be?

Would you know more of us?

Twelve are but six of us,

Five are but four, do you see?

What are we?

What have one eye but still cannot see?

I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see?

John enters a small room. The Door Closes.
When the door opens, John is in a larger room.

Explain?