42

- The Answer to Life, the Universe, and Everything is... 42!
- Forty-two! - yelled Loonquawl - Is that all you've got to show for seven and a half million years' work?
-I checked it very thoroughly - said the computer - and that quite definitely is the answer. I think the problem, to be quite honest with you, is that you've never actually known what the question is.

(Hitchhiker's Guide to the Galaxy)