10진수 : 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13... 2진수 : 0, 1, 10, 11, 100, 101, 110, 111, 1000, 1001, 1010, 1011, 1100... 16진수 : 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F...