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Radius
Joined: 20 Dec 2009
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Posted: Fri Sep 10, 2010 10:34 am Post subject: This Brain Teaser is driving me Crazy. Help! |
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Ok.
Take a 5 pointed star. It has 5 triangles (one at each point). Now this is what you have to do: You can draw 2 STRAIGHT lines through it anywhere you like, giving it more triangles. Like this:
http://i15.tinypic.com/4uyklr5.png
The object is to come up with 10 triangles from two lines drawn through the star. Good luck. All of my smartest kids cant do it, but apparently its possible. Dont look up the answer on the internet. I admit ive tried researching the answer, to no avail though. |
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Globutron
Joined: 13 Feb 2010 Location: England/Anyang
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Posted: Fri Sep 10, 2010 10:43 am Post subject: |
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Solved in about 58 seconds!
Do I post my result or let other people figure it out? |
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Radius
Joined: 20 Dec 2009
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Posted: Fri Sep 10, 2010 10:48 am Post subject: |
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what? PM me. how did you do it? dont post answer here yet though |
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crescent

Joined: 15 Jan 2003 Location: yes.
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Posted: Fri Sep 10, 2010 3:18 pm Post subject: |
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Take the plastic wrap off first. |
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alljokingaside
Joined: 17 Feb 2010
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Posted: Fri Sep 10, 2010 9:52 pm Post subject: |
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a hint on one possibility:
avoid the central pentagon
(actually, i haven't done the leg work, but i'm pretty sure the it's a red herring) |
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georgeperec
Joined: 04 Aug 2009
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Posted: Sat Sep 11, 2010 12:26 am Post subject: Re: This Brain Teaser is driving me Crazy. Help! |
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Radius wrote: |
I admit ive tried researching the answer, to no avail though. |
you sure? "5 pointed star, 10 triangles, two lines" on google gets you there in no time. |
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Radius
Joined: 20 Dec 2009
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Posted: Sat Sep 11, 2010 1:06 am Post subject: Re: This Brain Teaser is driving me Crazy. Help! |
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georgeperec wrote: |
Radius wrote: |
I admit ive tried researching the answer, to no avail though. |
you sure? "5 pointed star, 10 triangles, two lines" on google gets you there in no time. |
hmm, i was typing something in differently than how you wrote. but i see the solution now. i feel better  |
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Globutron
Joined: 13 Feb 2010 Location: England/Anyang
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Posted: Sat Sep 11, 2010 4:56 am Post subject: |
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You're all a bunch of cheating ******! Am I the only one that did it by myself? |
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Fox

Joined: 04 Mar 2009
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Posted: Sat Sep 11, 2010 5:11 am Post subject: |
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Globutron wrote: |
You're all a bunch of cheating ******! Am I the only one that did it by myself? |
I did it myself without much problem, though it took me a bit longer than your 58 seconds, so hats off to you. |
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The Cosmic Hum

Joined: 09 May 2003 Location: Sonic Space
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Posted: Sat Sep 11, 2010 9:19 am Post subject: |
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I added two lines and get 22 triangles. |
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RMNC

Joined: 21 Jul 2010
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oldtactics

Joined: 18 Oct 2008
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Posted: Sat Sep 11, 2010 11:46 am Post subject: |
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I got it on the first try without cheating. Maybe you're overthinking it. |
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caniff
Joined: 03 Feb 2004 Location: All over the map
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Posted: Sat Sep 11, 2010 12:23 pm Post subject: |
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oldtactics wrote: |
I got it on the first try without cheating. |
I did it in less than 45 seconds while using my gochu as a pen as I took leak on the sidewalk. |
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dharmasister
Joined: 23 Aug 2010 Location: New Orleans, Louisiana
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Posted: Sat Sep 11, 2010 1:51 pm Post subject: |
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Quote: |
Take the plastic wrap off first. |
Too funny!!! Never gonna live that one down! |
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laguna
Joined: 27 Jun 2010
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Posted: Mon Sep 13, 2010 11:59 am Post subject: |
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I can do it in one |
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