Which is the rope you never skip with?

What does the rebus below mean?

TEN BADTION

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

What has many teeth, but cannot bite?

Who can jump higher than a Mountain?

What can you hold in your right hand, but never in your left hand?

I am a type of room you cannot enter or leave. Raised from the ground below, I could be poisonous or a delicious treat. What am I?

A police officer was passing by when he saw a guy hiding. He walked up to him and genially asked, "What is your name?"

"Shut up!" the boy responded.

"Where are your manners?" asked the outraged police officer.

"Up that tree," said the boy discourteously, directing to a neighbouring tree.

You're looking for trouble, aren't you?" said the police officer.

"No, trouble is looking for me!" the boy answered solemnly.

Why is the boy behaving like this?

I can write cow in 13 letters.

Can You?

Which Travels Faster? Solve below famous picture riddle: