All 4 digit combinations 0 9 with repeats July 8, 2019 16 32 64 128 4 digit combinations 0 9 no repeats list All 4 digit combinations 0 9 no repeats 4 digit combinations 0 9 with repeats List of 4 digit combinations 0 9 with repeats Count by 9 Digit and number difference 1 2 3 4 5 jump