100 doors: Difference between revisions

link no longer goes to the right place
(link no longer goes to the right place)
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The third time, every 3rd door (door #3, #6, #9, ...), etc, until you only visit the 100th door.
 
Question: What state are the doors in after the last pass? Which are open, which are closed? [http://www.techinterview.org/Puzzles/fog0000000079.html]
 
'''[[task feature::Rosetta Code:extra credit|Alternate]]:'''