i just found this while trying to find the meaning of life on wikipedia:
gave me a giggleQuote:
It was later pointed out by readers that 6 × 9 = 42 if the calculations are performed in base 13, not base 10. Douglas Adams has averred that he was not aware of this at the time, and repeatedly dismissed this as an irrelevant concoction, saying that "nobody writes jokes in base 13 [...] I may be a pretty sad person, but I don't make jokes in base 13."[/b]