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missionaries and cannibals (with wrinkles)

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stormin | 16:12 Sat 13th Aug 2005 | Quizzes & Puzzles
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A sheriff, an outlaw, a bible salesman plus 2 assistants,and a whisky salesman plus 2 assistants need to cross a river using a convenient boat.  A maximum of 2 people can use the boat at any time.  Only the sheriff, bible salesman, and whisky salesman can operate the boat.  The outlaw cannot stay with anyone unless the sheriff is present.  Bible salesman cannot stay with whisky assistants unless whisky salesman is present.  Whisky salesman cannot stay with bible assistants unless bible salesman is present.

How many trips does it take for everyone to cross?

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The answer is 17 crossings.

I answered this one before for splodge24
    See this question

That version has a mother and 2 sons instead of the Bible salesman and 2 assistants, and has a father and 2 daughters instead of the whisky salesman and 2 assistants.  The linked question also contains a link to a shockwave flash animation which lets you try out the solution.

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missionaries and cannibals (with wrinkles)

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