Question

qual e o mmc de 4,5,10,20

Answer 1

4, 5, 10, 20 | 2
2, 5, 5,   10 | 2
1, 5, 5,    5  | 5
1, 1, 1,    1  | 2 x 2 x 5 = 20 

MMC (4, 5, 10, 20) = 20