Way out west lies the sleepy hollow of Yellow Rock. Yep! This place is further west than Redfern, Greenacres or Orangegrove. In fact it's further west than Greystanes and Blacktown, but alas its no further west than the Blue Mountains.
Out here the men are mountainous, the women are monstrous, the views are momentous and the caches are memorable. So if you can handle the sites/sights come and try this little multi-cache.
At waypoint 1: You'll need to find the numbers that fit into the equation below. (# = number)
((# + # + # + # + #) x #) / # = '?'
Multiply '?' by 10203 to give you the new south coordinate.
Multiply '?' by 9737 to give you the new east coordinate.
Due to some recent muggling of this cache GZ has been moved to a safer location. Now if you think your on top of it, you probably are.
There are numerous cliffs near GZ so the usual safety rules apply.