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Water Works (Posted on 2002-11-02) Difficulty: 2 of 5
You have a 5 gallon jug and a 3 gallon jug. You have no other measuring devices.

Measure out exactly 4 gallons of water (Assume you have a river handy, or some other limitless water supply).

  Submitted by scunny    
Rating: 2.2667 (15 votes)
Solution: (Hide)
We will use "(X,Y)" after each step to indicate how much water is in each jug. X will be the amount in the 5 gallon jug, Y - the 3 gallon one.

  • Fill up the 5 gallon jug (5,0)
  • Use it to fill up the 3 gallon jug (2,3)
  • Empty out the 3 gallon jug (2,0)
  • Pour everything from 5 into 3 (0,2)
  • Fill up 5 again (5,2)
  • Pour water out of 5 into 3 till 3 fills up (4,3)

    Voila! You now have 4 gallons in the 5 gallon jug.

  • Comments: ( You must be logged in to post comments.)
      Subject Author Date
    SolutionPuzzle ResolutionK Sengupta2007-06-18 05:49:43
    my wayRobert Hunter2004-09-28 20:39:55
    gagavije2004-07-02 15:07:13
    No SubjectSteve Royer2004-04-21 00:16:42
    Solutionanswerlogischer Verstand2004-04-08 13:16:30
    SolutionSolutionJack McBarn2004-02-11 14:28:06
    No SubjectJeff2003-09-26 22:32:57
    SolutionsolutionLewis2003-05-04 20:38:57
    SolutionChaz2003-05-04 07:11:53
    Solutionbest wayJonathan2003-03-11 09:16:16
    my wayN__A__T__A2003-01-02 10:07:29
    Solutionok this worksKenneth2002-11-05 10:12:43
    re: easy solutionTomM2002-11-03 13:06:05
    re: Another WayMary Fisher2002-11-03 10:59:35
    easy solutionMary Fisher2002-11-03 10:56:21
    Another Wayrandy2002-11-02 09:55:06
    Solutionbalancing actTomM2002-11-02 08:16:05
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