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Posted: 11/12/2014 2:34:58 AM EST

I've taken to doing some basic math as a way to pass time and keep it fresh, thinks like solving for the quadratic and proofs for the Pythagorean theorem and the Law of Sines/Cosines.  What's something else that's good to know but basic?  My calc is... rusty.  

Link Posted: 11/12/2014 2:47:39 AM EST
[#1]
Google "The Hardest Easy Geometry Problem"
Link Posted: 11/13/2014 7:42:21 PM EST
[#2]

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Quoted:


Google "The Hardest Easy Geometry Problem"
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We're not friends anymore.    I just 90 minutes solving that.
Link Posted: 11/13/2014 7:59:29 PM EST
[#3]
Personally I always enjoyed this list of problems, but it doesn't really fulfil your request - http://en.wikipedia.org/wiki/List_of_NP-complete_problems

Link Posted: 11/13/2014 10:08:20 PM EST
[#4]
Link Posted: 11/28/2014 11:38:52 PM EST
[#5]
Are you familiar with proofs, and different proof techniques?
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