this is a good one

"If a chicken and a half laid an egg and a half in a day and a half, how
long would it take for a grasshopper with a wooden leg to kick all of
the seeds out of a dill pickle?"
- Jim Polikoff Aug 7, `91

This is a parody of a puzzle that apparently asks how long it would take a certain number of chickens to lay a certain number of eggs. Assuming that a fractional chicken can lay a fractional egg or that a fractional chicken can contribute to laying a whole egg the base rate is that one chicken can lay one egg in a day and a half or that one and one-half chickens can lay one egg in one day.

Everyone knows it is 15 minutes. Ah, Zen and the Art of Humour!
(as if dill pickles had seeds.)

If it takes a chicken and a half to lay an egg and a half in a day in a half,
how long does it take to make a rock fall hard enough to break the
shingle off the roof of a doghouse? :wink:

Etc, etc.