#!/usr/bin/env python # -*- coding: utf-8 -*- """ Multiples of 3 and 5 (Problem 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 1000. @url: https://projecteuler.net/problem=1 @date: on Thu Feb 19 10:01:00 2015. @author: lilian. """ print sum(filter(lambda n: (n%3 == 0) or (n%5 == 0), range(1, 10)))