The Wonders of Maths
This is a letterbox cache with the cache at the posted coordinates, but to access the cache you'll need to have your maths head on and working.
Think of a three digit number where the first and last differ by two
Reverse the number and subtract the smaller number from the bigger number.
Take this number, reverse it and add the two together.
Its that simple 
There is a stamp and log book in the cache. For those that are not aware of leterbox caches. Please leave the stamp in the cache. Its there for you to stamp your own logbook / field journal. Feel free to use your own stamp on the log book.