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14 lines
368 B
Ruby
14 lines
368 B
Ruby
# If we list all the natural numbers below 10 that are multiples of 3 or 5,
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# we get 3, 5, 6 and 9. The sum of these multiples is 23.
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# Find the sum of all the multiples of 3 or 5 below 1000.
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def divisible_by_three_or_five?(number)
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(number % 3).zero? || (number % 5).zero?
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end
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sum = 0
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(1...1000).each do |i|
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sum += i if divisible_by_three_or_five?(i)
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end
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p sum
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