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.

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

Explain?

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

Can you find the missing piece of the Porsche?

A man started to town with a fox, a goose, and a sack of corn. He came to a stream which he had to cross in a tiny boat. He could only take one across at a time. He could not leave the fox alone with the goose or the goose alone with the corn. How did he get them all safely over the stream?

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

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

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

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?