Question

4 is the highest common factor (HCF) of each

Answer 1

Answer:

D 20,80 dan/and 120

Step-by-step explanation:

$20 = {2}^{2} \times 5 \\ 80 = {2}^{4} \times 5 \\ 120 = {2}^{3} \times 3 \times 5 \\ common \: factors = {2}^{2} \: and \: 5 \\ hcf = {2}^{2} \times 5 = 20$