Project Euler Problem 1

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問題

If we list all the natural numbers below 10 that are multiples of
3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23.

Find the sum of all the multiples of 3 or 5 below 1000.

ソース

sum = 0
(1...1000).each{|x|
	sum += x if x % 3 == 0 || x % 5 == 0
}
puts sum

解答

233168

感想

コレは激簡単！
これから頑張るぞ〜