89-93 (sums) Mystery Cache

Here’s a series of rather easy puzzle caches put out to commemorate the years since February 1964 (for no discernable reason).

If you tackle the caches in chronological order (or reverse chronological order) they should be a relatively straightforward circuit out of Great Chart and back which shouldn’t take more than a couple of hours.

A hint to the cache is in the geochecker, as for the puzzle, the Internet is always helpful.

Many of my friends went to University. I never did. But I got a degree with Open University. It was in mathematics. No one was more surprised than I was when I discovered I was a mathemagician. However despite getting a B.A. degree, “X” still remained an unknown quantity. Take for example the equation

........

It has two possible values for q. Minus one is one solution. Try it. There is another possible value for q as well. When you have that answer you’ll find the cache at

N 51 08. (q+4)(q-1)(q-q)  E 00 48 . (q+2) (q+2) (q+3)