Respuesta :

Answer:

THe HCF is 4 and the LCM is 24. The sum of 24 and 4 is 28. The answer is 28.

Step-by-step explanation:

HCF:

8: 1, 2, 4, 8

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

LCM:

8: 8, 16, 24, 32, 40

12: 12, 24, 36, 48