Easy clever riddles for teens with simple answers

An infinite number of mathematicians are standing behind a bar. The first asks the barman for half a pint of beer, the second for a quarter pint, the third an eighth, and so on. How many pints of beer will the barman need to fulfill all mathematicians' wishes?

I run over fields and woods all day. Under the bed at night I sit, never alone. My tongue hangs out, up and to the rear, waiting to be filled in the morning. What am I?

What runs around the house, but does not move?

It’s been around for millions of years, but it’s no more than a month old. What is it?

What kind of soda must you not drink?

What has a head but never weeps, has a bed but never sleeps, can run but never walks, and has a bank but no money?

What is it that when you take away the whole, you still have some left over?

Alive as you but without breath, As cold in my life as in my death; Never a thirst though I always drink, Dressed in a mail but never a clink.

What does this rebus say? XLR8.

What has no beginning, end, or middle?