For those people who do not wish to sit through Monty Python's masterpiece, here is the Meaning of Life:
Try and be nice to people, avoid eating fat, read a good book every now and then, get some walking in and try and live together in peace and harmony with people of all creeds and nations.
You're probably wondering why the meaning of life is just a number.
I won't explain to you this, but i'll tell you one thing.
To understand the answer, you must first understand the question.
{"Cave man" lays out following sentence in Scrabble stones: "What do you get if you multiply six by nine?")
Arthur: Six by nine? Forty-two? You know, I've always felt that there was something fundamentally wrong with the Universe.
(Faint and distant voice:) Base thirteen!