public class NumberPuzzlesIV { public static void main (String[] args) { for (int a = 0; a <= 12; a++) { for (int b = 0; b <= 12; b++) { for (int c = 0; c <= 12; c++) { for (int d <= 0; d <= 12; d++) { if (((a + 2) == (b - 2)) && ((b - 2) == (c * 2)) && ((c * 2) == (d / 2))) { if ((a + b + c + d) == 45) { System.out.println(a + ", " + b + ", " + c + ", " + d) } } } } } } } }