On 2008.12.12., at 19:36, Matthew M. wrote:
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The three rules of Ruby Q. 2:
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Please do not post any solutions or spoiler discussion for this
quiz until 48 hours have passed from the time on this message. -
Support Ruby Q. 2 by submitting ideas as often as you can!
Visit http://splatbang.com/rubyquiz/. -
Enjoy!
Suggestion: A [QUIZ] in the subject of emails about the problem
helps everyone on Ruby T. follow the discussion. Please reply to
the original quiz message, if you can.
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Mix and Match (#186)
Another brute force attack 
If you are interested in the explanation:
http://www.rubyrailways.com/ruby-quiz-mix-and-match/
Cheers,
Peter