Here are questions about five numbers. When you have them, add them together. Your total will be ABCD. Substitute those in the final notation to learn the cache coordinates.
1) What is the sum when the first Roman numeral alphabetically is added to all of the numerically smaller 'Roman letters'?
2) Which is the lowest whole number, to use the letter " a " when spelt in English?
3) What is the lowest number, when spelt in German, that uses the letter b, three times.
4) Which Roman numeral is 499 more than it is in French?
5) What is the only number which, when spelt in English, has all its letters in alphabetic order?
The plastic 3 litre olive barrel is to be found at N50:46:(B-A)(A+D)(A+B+D),W003:02:(C-A)(C-B+A)(D+A+A).