Can you solve the river crossing riddle? – Lisa Winer



View full lesson: http://ed.ted.com/lessons/can-you-solve-the-river-crossing-riddle-lisa-winer

As a wildfire rages through the grasslands, three lions and three wildebeest flee for their lives. To escape the inferno, they must cross over to the left bank of a crocodile-infested river. Can you help them figure out how to get across on the one raft available without losing any lives? Lisa Winer shows how.

Lesson by Lisa Winer, animation by Artrake Studio.

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27 thoughts on “Can you solve the river crossing riddle? – Lisa Winer

  • September 14, 2017 at 9:27 pm
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    That is the first one I solved instantly. Others much longer me long or I've given up

    Reply
  • September 14, 2017 at 9:27 pm
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    I actually found the concept of this situation really cool, in the time of danger predator and prey work together to escape, attempting to fight instincts.

    Reply
  • September 14, 2017 at 9:27 pm
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    But you can pair yourself with duo and leave the other hallway uncheck if non of the three groups found the exit then the hallway unchecked is the exit. if the the two lies you can know who to trust because if its in your group you know the answer. if it is on the other group then there will be conflict

    Reply
  • September 14, 2017 at 9:27 pm
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    what if the two cursed students lie by telling you that one path is the right one , when it is not

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  • September 14, 2017 at 9:27 pm
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    Simplest way
    1 ) 2 lions get across
    2 ) 2 wildebeests get across
    3 ) 1 lion , 1 wildebeest get across
    By my 10 year old grandson

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  • September 14, 2017 at 9:27 pm
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    The even simpler way :
    1 ) 2 lions get across
    2 ) 2 wildebeests get across
    3 ) 1 lion and 1 wildebeest get across
    They all save their lives
    Simplest and fastest way to get across (3 moves )
    By 10 year old grandson

    Reply
  • September 14, 2017 at 9:27 pm
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    There is a faster way! 1 crossing 2 Lions 2 crossing 2 wildebeest 3 crossing 1 wildebeest 4 crossing 2 wildebeest 5 crossing 1 lion 6 crossing 2 lions then they are all safe in only 6 crossings!

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  • September 14, 2017 at 9:27 pm
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    I heard this riddle when I was little. It was one of my first ones!

    Reply
  • September 14, 2017 at 9:27 pm
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    how about when all 3 lions are on one side they wait for those beast to get roasted and come back to enjoy cooked food? they all 3 got on one side once? right?

    Reply

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