To get the co-ordinates of the cache you need to answer the following questions (you might need a calculator and the Internet):
If you have 33p stamps and 15p stamps only, how many stamps do you need to post a package costing £1.77 EXACTLY? Answer A x 33p stamps + B x 15p stamps.
How many years does it take a human heart to beat 1 billion times? Answer C
How many prime numbers are there under 50 (include 1)? Answer D
What is the next number in this sequence: 1, 4, 9, 16, 25, 36, .....? Answer E
How many novels did Anthony Trollope write? Answer F
(You should find that A+B+C+D+E+F = 146)
X = E + B
Y = (F x A x B) - 2
Z = (C x D) + B - A
The cache is hidden at N 50. X . Y W 001.12. Z
The cache is a medium sized ammo box, with a small selection of goodies.
Suggested car parking is at N50.51.716 W001.12.474, however, anything wider than a car may not fit through the narrow gap.
You can check your answers for this puzzle on Geochecker.com.