A farmer wishes to enclose the maximum possible area with 100 meters of fence. The pasture is bordered by a straight cliff, which may be used as part of the fence. What is the maximum area that can be enclosed?
Referencing any science jokes web site out there, the answer really is more than whats been proposed so far. As the joke goes, its typically a mathematician who comes up with the answer, which is parapharased as follows - He surrounds himself with fence and then says "I declare myself to be on the outside of the fence", thereby enclosing the rest of the world with a fairly limited section of fence.