180 is the LCM of 12 and a number, N. What is the possible values of n?

90 was the only one that worked.

If you go anywhere in the range from 13-89 you’ll notice that the number gets close or it goes over 180 and if it’s a number that divides into 180 evenly then there’s a smaller LCM. I stoped at 90 because if you go higher than 90 the next multiple would be greater than 180