+9 For how many integer values of $M$ is $\frac{M}{30}$ strictly between $\frac{1}{3}$ and $\frac{3}{5}$?
+36916 1/3 = 10 / 30 3/5 = 18/30
so you are looking at M between 10 and 18 ( non-inclusive) 11 12 13 14 15 16 17 <======== how many is that?
+36916 1/3 = 10 / 30 3/5 = 18/30
so you are looking at M between 10 and 18 ( non-inclusive) 11 12 13 14 15 16 17 <======== how many is that?
