Can you find the missing piece of the Porsche?

I am dry when I go inside, but wet when I am pulled outside.
The longer I am inside, the stronger I get
When I am completely out, I am wet and I literally sag
Who am I?

What has to be broken before you can use it?

What breaks yet never falls, and what falls yet never breaks?

Twenty frogs are sitting on a log floating on the surface of a river. Two of them decide to jump off into the water.

How many frogs are there on the log at this moment?

I am beautiful, up in the sky. I am magical, yet I cannot fly. To people I bring luck, and to some people, riches. The boy at my end does whatever he wishes. What am I?

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

Explain?

A man and a dog were going down the street. The man rode, yet walked. What was the dog’s name?

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?

Can you solve this picture maths equation?