What is the greatest riddle you know?

What comes once in a minute, twice in a moment, but never in a thousand years?

I thought it was silence( you'd think so too)

Answer: the letter "m".

My favorite is:

Little Nancy Etticoat

In a white petticoat

And a red nose

The longer she stands

The shorter she grows

Answer: She's a candle

Its the beginning of eternity, the end of time and space, the beginning to every end and the end of every race.

The letter e

Here i sit, broken hearted.

Spent a dime, and only farted.

Uh oh, blew my second chance.

Tried to fart, but sh!t my pants.

x^0 = 1

I knew but did not know how to proove it.

One day someone told me x^0=x^(+m-m) =x^m/x^m =1