20 hot 9 year olds.
3, duh. (My ex's 9 year old little sister told me this joke, and followed is up with: "and YOU'RE the math guy!" >< Burned.)
A camera has photos and a foot has five toes. (Told to me by a 9 year old child I work with)
Well Son, if Mommy said yes all the time you'd have 20 more siblings.
There's 20 of them
20 9 year olds ( ) Sorry