What has to be broken before you can use it?

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 look flat, but I am deep. Hidden realms I shelter. Lives I take, but the food I offer. At times I am beautiful. I can be calm, angry, and turbulent. I have no heart but offer pleasure as well as death. No man can own me, yet I encompass what all men must have. What am I?

I’m orange, I wear a green hat and I sound like a parrot. What am I?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

1 rabbit saw 9 elephants while going to the river. Every elephant saw 3 monkeys going toward the river. Each monkey had 1 parrot in each hand. How many animals are going towards the river?

The more of this there is, the less you see. What is it?

I am a white box having no key or lid.
Yet there is a golden treasure inside it.

What Am I?

What has many keys but can’t open a single lock?

I have an eye but still cannot see.

Who am I?