### What is the LCM of 28 and 5?

To find the LCM of 28 and 5 you start by splitting these into
their prime factors:
28 = 2x2x7
5 = 5
The next step would be to identify any common factors. In this
case, there are none, and so we take all the factors, and multiply
them together to find the LCM:
2x2x7x5 = 140
Thus the LCM of 28 and 5 is 140.