Ok, this is deeply hilarious because I participated in Chicken Math unwittingly.
In February I finally decided to take the plunge and start chicken ownership. The line of reasoning for how many Golden Sex Links to get went as follows:
"Well gee, how many should I get? I'll probably only be able to eat 2 chickens worth of eggs personally, but I know that some people at work have expressed interest in getting eggs too, so maybe I should add another bird. Ooo, I've also heard that some can die or be a roo instead, so I'll get a fourth just to make sure. Also, I've had my eye on the barred cochins because they're so darned cute, I'll play chicken roulette since they don't sex them and hope I get a hen."
This is how I got from a small flock of 2, to 5. Glad to know I was following a mathematical law!