Hey did you know that the fascination for the number 42 did not actually start with 'The Hitchhiker's Guide To The Galaxy'?
It actually began with Lewis Carroll, and incidentally the creators of 'The Hitchhiker's Guide To The Galaxy' were fans of Lewis Carroll (obviously, since their own work is mostly nonsense, LOL)
Quoted from Wikipedia, but you can check his works. ;)
1) He wrote The Hunting Of The Snark when he was 42.
2) Douglas Adams divided the radio series of The Hitchhikers Guide to the Galaxy into "fits", after a suggestion by Geoffrey Perkins, inspired by the Hunting of the Snark.
3) The Baker (a character in The Hunting Of The Snark) is around the same age, as the phrase "I skip forty years" in Fit the Third: The Baker's Tale discloses.
4) The Baker had "forty-two boxes, all carefully packed, With his name painted clearly on each" (Fit the First), which he left on the beach, presumably his previous life.
5) Rule 42 of the Code (!) in the preface of The Hunting of the Snark:
No one shall speak to the Man at the Helm
6) Rule 42 in Alice's Adventures in Wonderland:
All persons more than a mile high to leave the court
7) and the fact that Carroll referred to his age as 42 when he was still in his thirties (!)
Now back to the question...
The question was: What is the question?
The answer to everything is 42.
Hence 42!
You can probably use that as a question... i.e.
Man 2: 42!
Man 1: 42?
Man 2: 84!
Man 1: What was my question?
Man 2: 42!
Man 1: Are you sure?
Man 2: 42!
Man 1: Do you like cats?
Man 2: 42!
Man 1: ...
Man 2: 42!
...ad infinitum...
Note: Man 2 may be slightly retarded.