In Legend of Zelda Phantom Hourglass when I finally worked out the Ghost Ship puzzle. I don't think any puzzle has ever driven me so mad. I honestly thought it was a glitch that I couldn't continue. If you haven't played the game and have no intention of doing so please read further down and read exactly what I'm talking about.
SPOLER ALERT!
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On the ghost ship there are 5 levers and a legend that says something like "Pull the levers! 2 4 5 1 3 "
With this is mind you would assume that means pull lever 2 first, lever 4 second, lever 5 third, etc.
So with these ("o") representing levers you would expect to pull them in this order:
o - o- o- o- o
4th 1st 5th 2nd 3rd
This doesn't work. What else can you do!?
Then it finally dawned on me after about 3 hours of on off play over the course of about a week that the clue meant something else!
24513 doesn't mean pull lever 2 first, lever 4 second, lever 5 third, etc.
It in fact means pull lever 1 second, lever 2 fourth, lever 3 5th, etc, so the actual order is this:
o - o - o - o - o
2nd 4th 5th 1st 3rd