Why do you find that most of the buildings are deprived of the 13th floor?

He loves to dance, twist and prance, he shakes his tail, and as a way he sails, wingless he flies into the sky. What is he?

What type of tree can I carry in my hand?

Different lights make me strange by changing me into different sizes. What am I?

By what process could you make a 'Tea-Table' into food?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

It has horns but can’t beep. It is like to bleat but It is not a sheep. What is it?

It's a 7-letter word.
If we remove 1 letter from it, it remains the same.
If we remove 2 letters from it, it remains the same.
If we remove 3 letters from it, it remains the same.
If we remove all the letters from it, still it remains the same.
What is it?

I am quite hot but become too cold if you remove the first two letters. What am I?

A sea diver is a real show-off. He showed everyone that he can hold his breath underwater for 15 minutes.

I went to the diver and told him that I can be underwater for double the time i.e 30 minutes.
He responded that he will give me 100$ if I would be able to do it. I won 100$.

What did I do?