What is full of holes but still holds water?

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?

I have branches, but no fruit, trunk or leaves. What am I?

There were three women in all the swimming costumes!
One was happy and the other two were sad!
The happy one was crying and the sad ones were smiling.
Why was this?

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

It is deaf, Dumb and Blind!!!

Still, always tells the truth. What is it?

Two boys were admitted to a school. When the headmaster asks them about their parents, they tell him that they have same parents (father and mother). On further inquiry, it turns out that they both share the same date for their birthday.

"Are you twins," ask the headmaster.
"No," replies the boys.

Is it possible?

If,
29 - 1 = 30
9 - 1 = 10
14 - 1 = 15

Based on similar logic, Can you prove that the below algebraic equation is true?
11 - 1 = 10 ?

I don't get anymore wetter, no matter how much rain falls on me.

Get total of 120 by using five zeros 0,0,0,0,0 and any one mathematical operator.
Do you ?