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s2t2/number_cruncher.rb

Last active August 29, 2015 13:56
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number_cruncher.rb
def multiples_of_x_less_than_y(x, y)
(1..(y / x)).to_a.map {|z| x * z}
end
(multiples_of_x_less_than_y(3,80) + multiples_of_x_less_than_y(5,80)).uniq.sort.sum
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