When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

It belongs to you, but other people use it more than you do. What is it?

I am first found in caves, now prolific online; I am a depiction, a drawing, a symbol, or sign. I will convey whichever mood you could wish; or for that matter, a fist, flask, or fish. What am I?

Can you solve the rebus below?

You Throw The Outside, Cook The Inside
Eat The Outside, Throw The Inside.

What Is It?

A man has to get a fox, a chicken, and a sack of corn across a river.

He has a rowboat, and it can only carry him and one other thing.
If the fox and the chicken are left together, the fox will eat the chicken.
If the chicken and the corn are left together, the chicken will eat the corn.

How does the man do it?

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

When Jack was six years old he hammered a nail into his favourite tree to mark his height. Ten years later at age sixteen, Jack returned to see how much higher the nail was. If the tree grew by five centimetres each year, how much higher would the nail be?

John was drowned by he was not wet. How?

Find three whole, positive numbers that have the same answer when multiplied together as when added together.