### Problem description:

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.

### Problem solving:

This is first problem in problem set, so algorithm is pretty obvious.

import java.util.stream.IntStream; public class Problem_1 { public static void main(String[] args) { System.out.println( IntStream .range(0, 1000) .filter(i -> i % 3 == 0 || i % 5 == 0) .sum()); }

Answer: *233168*

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