This looked really fascinating, so I started work with pen and paper.
I went by hand for the first 6 digits, working out all the possible variations.
I then used a calculator to check the 7 digit combinations for divisibility by 7 (no shortcuts that I know of other than just try the division!), then back to by hand for the rest.
Then when I used Google Maps to check where the coords were, I fell for the trick of looking where it said the nearest address was, which was, well, unlikely...
After about 15 minutes of studying the 1:25000 maps online, I realised my mistake, and quickly identified the cache location.
Thanks to sirius Tas for the quick reply, a mental challenge, and a nice final location (I've actually considered taking the family here for a holiday).
Rated:
for
Overall Experience
