Question

multiplos de 8 12 20

Answer 1

8,12,20I2
4,6,10I2
2,3,5I2
1,3,5I3
1,1,5I5
1,1,1I120

Answer 2

M(8) =  {0, 8, 16, 24, 32, 40, 48 ...}
M(12) = {12, 24, 36, 48, 60, 72 ...}
M(20) = {20, 40, 60, 80, 100, 120... }

obs: os múltiplos são infinitos 

Espero ter ajudado, bjss