Not sure how many aikido people are Douglas Adams fans - used to be lots - but I recently heard an explanation of where Adams's use of 42 as "the ultimate answer to the ultimate question of life, the universe and everything" may have come from...
42 is the decimal ASCII code for the asterisk (*) symbol.
The asterisk, is used to represent "whatever you want" or "anything".
So the ultimate answer to the ultimate question of life, the universe, and everything is - whatever you want ...
Adams had a lot of hidden references to religion, society, government, bureaucracy, and other things - some not so hidden.