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bragboy/euler_206.rb

Created November 12, 2015 10:54
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euler_206.rb
(101010107..199999999).step(10) do |n|
if ((n*n).to_s.gsub /(.)./,'\1') == "123456789" || (((n-4)*(n-4)).to_s.gsub /(.)./,'\1') == "123456789"
puts "The unique positive number is #{n*10}"
break
end
end
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