REVISED March 30, 2008
The posted coordinates are for parking only. If you have 4WD,
you can get closer to the cache. For a description of this
fascinating historical site, see the listing for
Queen's Fort 1. To find the cache coordinates, you must
solve the puzzle.
Latitude
The degrees are the same as in the posted coordinates. The
decimal minutes are calculated as follows:
- A geocacher finds a cache that contains 23 trade items. She
wants to trade for 5 items, but has trouble deciding which to take.
How many different combinations of 5 items is it possible for her
to take from the cache?
- Divide this number by the smallest two-digit prime.
- Divide your result by the street number of the British Prime
Minister's residence.
- Subtract the year that the Magna Carta was first issued.
- Add twice the number of carbon atoms in a heptane
molecule.
- Divide the result by the number of cubic centimeters in a
liter.
Longitude
The degrees are the same as in the posted coordinates. The
decimal minutes are calculated as follows:
- Begin with the number of light-years in a parsec, rounded to 4
decimal places, and multiplied by 10,000.
- Subtract the atomic weight of gold.
- Subtract the number of feet in two furlongs.
- Add the two prime factors of the number 361.
- Add pi raised to the zero power.
- Divide the result by the number of liters in a cubic
meter.