Respuesta :

Answer:

4

Step-by-step explanation:

The factors of 40 are  1, 2, 4, 5, 8, 10, 20, 40

The factors of 4 are 1, 2, 4

The common factors are 1, 2, 4

The greatest common factor is 4

The answer is 4.

Hope this helps and hope you have a great day