Best riddles for teens

What country is hidden in the paragraph below? As defendants, we deny all involvement in the unscrupulous dealings which have come to light in the recent government investigation.

Why is someone who borrows money but does not pay it all back like a football player?

What do you call a cow in a earthquake?

What has 4 wheels and flies?

An iron horse with a flaxen tail. The faster the horse runs, the shorter his tail becomes. What is it?

What gets shorter when you close your arm?

I'm in your phone. Sometimes I laugh. Sometimes I cry. I even flip you off from time to time. What am I ?

What is it that goes up and goes down but does not move?

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

You are a bus driver. The bus starts out empty. At the first stop 4 people get on. At the second stop, 8 people get on and 3 get off. At the third stop, 2 people get off and 4 get on. The question is, what color are the bus driver's eyes?