Respuesta :

Answer:

3

Step-by-step explanation:

12: 1, 2, 3, 4, 6 & 12

60: 1, 2, 3, 4, 5, 6, 10, 12, 15,…

18: 1, 2, 3, 6, 9 & 18

45: 1, 3, 5, 9, 15 & 45

LCM = 3