What is the least common multiple of 8 12 18 and 20?

Answer 1

LCM of 8, 12, 18, 20 = 23 x 32 x 5 = 8 x 9 x 5 = 360
lcm for 8, 12, 18, 20

.

8 = 2*2*2 = 2^3

12 = 2*2*3 = 2^2, 3^1

18 = 2*3*3 = 2^1, 3^2

20 = 2*2*5 = 2^2, 5^1

highest power for each prime is 2^3, 3^2, 5^1

multiply out 2*2*2 * 3*3 * 5 = 360