Question 845376
Suppose 192 is divided by k. Then we can write *[tex \large 192 = kn + 12], where *[tex \large n \in \mathbb{Z}^{+}], so *[tex \large 180 = kn]. Hence k must be a factor of 180. Furthermore, k must be greater than 12, otherwise the remainder would be less than 12. The three smallest factors of 180 greater than 12 are 15, 18, and 20.