What is the LCM of 20 16 12?
To find the LCm of 12, 16 and 20 you first need to break these
numbers into their prime factors:
12 = 2x2x3
16 = 2x2x2x2
20 = 2x2x5
The next step is to identify any common factors. In this case,
all three numbers have two 2s as prime factors, so we can discard 4
of them. Take every other prime factor (2, 2, 2, 2, 3 and 5) and
multiply them together to find the LCM:
2x2x2x2x3x5 = 240
Thus the LCM of 12, 16 and 20 is 240.