Cache is not at above location, but will take you to a location to look for a number, called R which you will need once you find the coordinates for the final cache location.
I am using a Math-Magical problem that I learned when I was 10 years old. It is a great trick -- don't drop any zeros.
To solve, pick any three digit number (where the first digit is larger than the last), called a. Reverse the digits to create a second number, called b. Subtract the smaller number (a or b) from the larger number. You will get another three digit number, called c (keep the place value with 0's if you must. Reverse the digits again to create a fourth number, called d. Add c and d.
The sum will always result in a four digit number, called wxyz where wxyz are used to complete the coordinates:
N 2z 4x.xy(R-2) and W xz5 2(R-2w).(2w)2R.
These are NOW the coordinates to the final cache. I took out the redirect. Did you find R?