Determine the Least Common Multiple (LCM) of (12,15,20)

We start by listing out each multiple for our 3 numbers

The LCM is the smallest multiple common in all the lists

12,24,36,48,60,72,84,96

15,30,45,60,75,90,105

20,40,60,80,100,120

Our Least Common Multiple (LCM) of (12,15,20) is 60