Well, you need to find the least common multiple (LCM) of 4, 6, 8, 10, 12, 20, and 100. You can disregard 4 and 6 because they are factors of 12, and we can disregard 10 and 20 because they are factors of 100.
So we really need to find: LCM(8, 12, 100)
8 = 2 * 2 * 2
12 = 2 * 2 * 3
100 = 2 *...