There are 20 multiples of 9 between 100,000 and 100,185 as follows:
(100008, 100017, 100026, 100035, 100044, 100053, 100062, 100071, 100080, 100089, 100098, 100107, 100116, 100125, 100134, 100143, 100152, 100161, 100170, 100179) Total = 20 such numbers.