Answer:
2,1
Step-by-step explanation:
What is the GCF of 28 and 40. The gcf of 28 and 40 can be obtained like this: The factors of 28 are 28, 14, 7, 4, 2, 1. The factors of 40 are 40, 20, 10, 8, 5, 4, 2, 1.
1,2 and 4
