what are the LCM of 8 and 20

Answer 1

Multiples of 8:

8, 16, 24, 32, 40, 48, 56, 64

Multiples of 20:

20, 40, 60, 80, 100

Which number is the same in both groups? That's the LCM.

Answer 2

40

Answer 3

Right.