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lune-sta/gist:3427580

Created August 22, 2012 17:06
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Project Euler 32
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gistfile1.rb
p (1000..9999).select{|a|(2..Math::sqrt(a)).select{|b|a % b == 0 && "#{a}#{b}#{a/b}".split(//).sort.join == (1..9).to_a.join}.empty?.!}.inject(0, :+) # 45228
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