The Pirates of the Black Pearl Mystery Cache
The Pirates of the Black Pearl
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Difficulty:
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Terrain:
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Size: 
(small)
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Fun little riddle and a nice bike or hike to the cache.
The list coordinates or only for a parking lot to start your journey
The Black Pearl, with 100 pirates on board sails ashore to find 100 treasure chests are lined up on the deserted beach. Each chest is closed. Each and every pirate decides to take a turn to see if they might discover the treasure inside. Naturally, the first pirate looks in every single chest. He carefully opens each chest and leaves it open finding nothing inside. The second pirate in line, somewhat deterred, decides only to look into every other chest, starting with the second chest. Finding all of the chests already open, he closes them carefully, but he only closes those chests that he stops at; only every other one. The third pirate only goes one out of every three chests, starting with chest #3. If he finds that chest opened, he closes it. But, if he finds it already closed, he reopens it. And so on down the line. Pirate #4 only goes to one in every 4 chests. Pirate #5 only stops at every fifth chest, starting with chest #5. Each pirate takes his turn, until the very last pirate in line stops only at the very last chest. If that chest was opened, he closes it. If it was closed, he opens it. When all 100 pirates have finished, they return to the Black Pearl, dejected that they did not discover the treasure.
But, did they miss something?
Your riddle is to determine how many chests remain open and which ones they are after all 100 pirates have taken their turn. Use the answer to find your own treasure, or walk the plank!
N 47.(4th open chest * 2, plus 1).(sum of the 4th and the 10th open chest, times double the 2nd chest) W 122.(5th open chest minus the 4th and 3rd open chest).(sum of the 7th and 1st open chest, divided by 5)
This cache is just off a trail, very easy bike [even for small children] or hike.
Additional Hints
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Treasures
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