This is one of nine puzzles to guide you back to your car once you’ve walked the Greensand Way
NO CACHES ARE AT THE POSTED CO-ORDINATES. DO NOT GO THERE – instead – solve this simple little puzzle

7 (seven) is the natural number following 6 and preceding 8. It is a prime number, and is often considered lucky in Western culture, and is often seen as highly symbolic. Seven is the lowest natural number that cannot be represented as the sum of the squares of three integers and the number of the Bullet-proof Bomb driven by the Anthill Mob in Wacky Races.
You will find this cache at
North 51 (G-G) (G+2) . (G-G)(G-6)(G-4)
East 000 (G-3) (G+2) . (G-1)(G+1)(G+1)
This cache is one of a linear series of nine. You will need a map to plan your route from one cache to the next, but the paths are quite obvious