Why 83?

Google kept trying to get me to watch a short Youtube about a Buddhist parable, so I did today, and quite liked it:

 

The only problem is: why so specific with 83 problems?  Reminds me a bit of the Answer to Life, the Universe and Everything being 42. (Actually, in the parable, there are 84 problems, and half of that is 42.  A connection?)

I also can't see where the parable is supposed to have originated.  Quick Googling indicates in not in any old Buddhist material, and some say it sounds kind of Zen, but I wouldn't have thought it should be hard to track down a source, if it's relatively modern.   Maybe I try again later.  It's one of my current 83 problems...