There's 2 islands, 1 island has a pile of seeds, a chicken, and a fox. There's also a boat next to this island, you have to get it all across with minimum uses of the boat. You can only take one thing across at once. If you leave the fox and the chicken, the fox will eat the chicken, if you leave the chicken and the pile of seeds, the chicken will eat the seeds.

How can you do it, please provide an explanation, and total number of boat uses.

  • $\begingroup$ Possible dupliate of puzzling.stackexchange.com/questions/18/… hopefully you agree $\endgroup$
    – skv
    Commented Nov 2, 2014 at 17:21
  • $\begingroup$ I absolutely would've thought this would be a duplicate. It's such a classic puzzle $\endgroup$
    – d'alar'cop
    Commented Nov 2, 2014 at 17:25
  • $\begingroup$ @skv Not quite, that asks how to solve, I'm asking you to solve. $\endgroup$
    – warspyking
    Commented Nov 2, 2014 at 17:47
  • $\begingroup$ @d'alar'cop ikr! $\endgroup$
    – warspyking
    Commented Nov 2, 2014 at 17:48
  • 4
    $\begingroup$ The best solution has been provided by xkcd. $\endgroup$
    – Twinkles
    Commented Nov 2, 2014 at 21:15

1 Answer 1

  1. take the Chicken across - bring nothing back
  2. take the Fox across - bring the Chicken back
  3. take the Seeds across - bring nothing back
  4. take the Chicken across

So, you will go there and back 3 times then go there with the Chicken at the end making 7 trips (3.5 round trips).

  • $\begingroup$ Technically the trip back IS another trip, please fix. $\endgroup$
    – warspyking
    Commented Nov 2, 2014 at 17:47
  • $\begingroup$ @warspyking I think I have $\endgroup$
    – d'alar'cop
    Commented Nov 2, 2014 at 18:18

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