Question

What is the LCM of 20 and 40?

Answer 1

20: 20, 40, 60, 80, 100, 120, 140, 160, 180, 200, 220, 240,…
40: 40, 80, 120, 160, 200, 240, 280, 320, 360, 400, 440,…

LCM(20, 40) = 40

Answer 2

answer is 40

20=2*2*5
40=2*2*2*5

40 is answer
LCM=least common multiplul