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.

What have one eye but still cannot see?

A man calls his dog from the opposite side of a river. The dog crosses the river without a bridge or a boat and manages to not get wet. How is this possible?

Which is the correct shadow of the bird?

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

Explain?

Begin with a word, five letters to my name,
Remove the first and last but I am the same
Take out my middle and still, I remain.
What word am I?

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

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

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

Can you solve this picture maths equation?