Decode this picture on T-Shirt and tell what it says ?

Which is the smallest number that you can write using all the vowels exactly once?

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?

You have a square. What you have to do is cut and reassemble the square such that you create a Red Cross sign that has the same volume as that of the square.

How can you make number one disappear by adding something to it?

What is the end of everything?

If we change the South-East direction into North and North-East into West and all others similarly.
Can you find out which direction will be in the place of South-West direction?

Which alphabet is a part of our body?

What does below pictogram mean?

Before Mount Everest was discovered, what was the highest mountain in the world?