No.
The LCM is 60.
The LCM is 60.
By making a table of their multiples, and finding the number where they are all the same. The answer is 60.
The LCM is 60
lcm(20, 60) = 60.
The LCM of 30 and 60 is 60
LCM(15, 20, 30) = 60
The answer is 60.
LCM of 15 and 60 = 60
30 and 60 have an LCM of 60.
Since 60 is a multiple of 5, it is automatically the LCM.
The LCM is 60.