Best riddles with simple answers

A clerk in the butcher shop is 5 feet, 10 inches tall. What does he weigh?

What kind of animal lives longest in zoos?

I have all the knowledge you have. But I am small as your fist that your hands can hold me. Who am I?

What is a frog's favorite game?

Where do you find a birthday present for a cat?

Everyone in the world needs it. They generously give it. But never take it. Then what is it?

Never trust this fellow’s grin. His teeth are sharp and course, his blood’s as cold as icicles, and he’ll show no remorse! What is it?

What has a foot but no legs?

What has no beginning, end, or middle?

I cannot be felt, seen or touched, yet I can be found in everybody. My existence is always in debate, yet I have my own style of music.