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Dysfunctional Crossing (Posted on 2005-09-26) Difficulty: 3 of 5
There are 8 people that need to cross a river. The water is too deep and fast to walk or swim across, and the only transportation device available is a raft. The raft can only be operated by adults, cannot float across the river on its own, and can carry at most two people.

The 8 people are a juvenile delinquent, her jailer, and a dysfunctional family of six: mother, father, two sons, and two daughters. To be clear, the only adults are the jailer, the mother, and the father.

Unfortunately some people fight with each other:

  • The juvenile delinquent will fight with anybody if her jailer is not present.
  • The father fights with either daughter if the mother is not present to mediate.
  • The mother fights with either son if the father is not present to mediate.
  • How can these 8 people cross the river without any fights? How many trips on the raft did it take?

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    See The Solution Submitted by nikki    
    Rating: 4.1538 (13 votes)

    Comments: ( Back to comment list | You must be logged in to post comments.)
    ?? for nikki | Comment 20 of 32 |

    Have you seen this solution?? If you have I will know That I still have some work to do.

    17 trips:

    D=delinquent,  J=jailer,  M=mother,  F=father, S1/S2=the sons, D1/D2=the daughters

    across:  M,F...back:  M...crossed:  F

    across:  M,D1...back:  M,F...crossed:  D1

    across:  M,D2...back:  M...crossed:  D1,D2

    across:  M,F...back:  F...crossed:  M,D1,D2

    across:  J,D...back:  M...crossed:  D1,D2,J,D

    across:  M,F...back:  F...crossed:  M,D1,D2,J,D

    across:  F,S1...back:  F,M...crossed:  D1,D2,S1,J,D

    across:  F,S2...back:  F...crossed:  D1,D2,S1,S2,J,D

    across:  F,M...crossed:  everyone


      Posted by Leigh Lillico on 2005-11-05 17:45:04
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