The Ultimate Answer
According to the
Hitchhiker's Guide, researchers from a pan-dimensional, hyper-intelligent race of beings, construct
Deep Thought, the second greatest computer of all time and space, to calculate the Ultimate Answer. After seven and a half million years of pondering the question, Deep Thought provides the answer: "forty-two."
- "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."
The search for the Ultimate Question
Deep Thought informs the researchers that it will design a second and greater computer, incorporating living beings as part of its computational matrix, to tell them what the question is. That computer was called Earth and was so big that it was often mistaken for a planet. The researchers themselves take the form of mice, to run the program. The question was lost five minutes before it was due to be produced, due to the Vogons' demolition of the Earth, supposedly to build a hyperspace bypass. Later in the series, it is revealed that the Vogons had been hired to destroy the Earth by a consortium of philosophers and psychiatrists who feared for the loss of their jobs when the meaning of life became common knowledge.
Lacking a real question, the mice proposed to use "How many roads must a man walk down?" (the first line of Bob Dylan's famous civil rights song
Blowin' In The Wind) as the question for talk shows, after considering and rejecting the question, "What's yellow and dangerous?"?actually a riddle whose answer, not given by Adams, is "shark-infested custard."
At the end of
Mostly Harmless, which is the last of the series of novels, there is a final reference to the number 42. As Arthur and Ford are dropped off at club Beta (owned by Stavro Mueller), Ford shouts at the cabby to stop "just there, number forty-two ? Right here!" The entire Earth (in all dimensions, not just those in which it was demolished by the Vogons), is destroyed immediately after this final reference.