Respuesta :

Answer:

10

Step-by-step explanation:

the factors of 20 are 1, 2, 4, 5, 10, 20

the factors of 30 are 1, 2, 3, 5, 6, 10, 15, 30

the common factors are 1, 2, 5, 10

the highest common factor is 10


The greatest common factor of 20 and 30 is 10