There is only one solution to this puzzle.
Find a number consisting of 9 digits in which each of the digits
from 1 through 9 appear only once. This number must satisfy the
following requirements:
a. The number should be evenly divisible by 9.
b. If the right most digit is removed, the remaining 8-digit number
should be evenly divisible by 8.
c. If then again the right most digit is removed, the remaining
7-digit number should be evenly divisible by 7.
d. Etc, etc... until the last remaining 1 digit number is evenly
divisble by 1.
Once you have determined the 9 digit number, let's call it X,
then the coordinates to the cache are:
N: (X-223285854)/35
W: (X-223318341)/21