Respuesta :

Answer:

5

Step-by-step explanation:

20- 1,2,4,5,10

5- 1, 5

Answer:

5

Step-by-step explanation:

5 is the largest number that will go into 5 & 20 equally.

20: 1, 2, 4, 5, 10, 20

5: 1, 5

greatest common factor (GCF) is 5.