She counts the legs, and divides by 4.
Russel.
Nirvana
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.)
4 brunettes
Four. Because calling the trunk a leg doesnt make it a leg.
A toddler can count past two...
Because it's undefined.
just cos.
A big wave
Thousands of brown loafers
Because 69 is a bit of a mouthful.