# Multiples of 3 and 5 # # 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. # # https://projecteuler.net/problem=1 # test result = list() for n in list(range(10))[1:]: if n % 3 == 0 or n % 5 == 0: result.append(n) assert(sum(result) == 23) # solution result = list() for n in list(range(1000))[1:]: if n % 3 == 0 or n % 5 == 0: result.append(n) print(sum(result)) # 233168