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Nine Dots

  1. May 25, 2005 #1
    This is one I learned in grade school.

    Connect the 9 dots with only 4 straight lines and without lifting your pencil / mouse.

    http://img12.echo.cx/my.php?image=9dots4bl.png
     
  2. jcsd
  3. May 25, 2005 #2
    I remember it from grade school too. A real example of thinking outside the box.
     
  4. May 25, 2005 #3

    JamesU

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    Funny, we were doing this very problem in school today :tongue:
     
  5. May 25, 2005 #4

    brewnog

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    Very funny, I was talking about this one with friends at Uni today!

    As jimmy said, it's definitely one to think outside the box on.
     
  6. May 25, 2005 #5
    I did this in psychology class last year, outside the box is right.
     
  7. May 25, 2005 #6
    This one is pretty cool.
     
  8. May 25, 2005 #7
    Yea, i also learned this from the grad, i think you people and people in my country was quite different, but then this is the same thing we done then...........
     
  9. May 26, 2005 #8
    is there is any out side the box puzzle, it is really interesting
     
  10. May 27, 2005 #9
    LOL... that's so funny that so many people were recently doing this one, or had learned it the same way I did. That's great. Well it's a classic then. :biggrin:

    Anyone who has not learned it previously have an answer for it???
     
  11. May 27, 2005 #10
    Hmm, how abt this?

    -- AI
     

    Attached Files:

  12. May 27, 2005 #11
    That's the one. :smile:
     
  13. May 28, 2005 #12

    matthyaouw

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    I'm still puzzling over it, and the forum still refuses to let me view attachments in the brain teasers board. Can anyone describe the answer to me or post an off-site link?

    Edit- never mind, googled it.
     
    Last edited: May 28, 2005
  14. May 28, 2005 #13
    click on the link and then click on log off. Then the image will appear.
     
  15. May 28, 2005 #14
    wow, that's a real nice bug
     
  16. Jun 2, 2005 #15
    Wow, I think that's one of the few brainteasers I've gotten within seconds of looking at it... but it wasn't really thinking outside of the box, there were still four 2D lines...
     
  17. Jun 2, 2005 #16

    Hurkyl

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    I wonder if the hints helped. :smile:
     
  18. Jun 10, 2005 #17

    NateTG

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    Well, you can do fun things like folding/bending the paper to get even fewer lines.
     
  19. Jun 10, 2005 #18

    Alkatran

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    The dots aren't points (infinitely small) so you can do it in three if you make the line segments very very long.
     
  20. Jun 12, 2005 #19
    Oh man, for some reason i thought you can't cross the line that you already drew. Otherwise i would have solved it.
     
  21. Jul 7, 2005 #20
    i cant get it
     
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