2010-10-01から1ヶ月間の記事一覧
http://projecteuler.net/index.php?section=problems&id=1 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 100…