Answer:
GCF: 4
Explanation:
Factors of 20: 1,2,4,5,10,20.
Factors of 28: 1,2,4,7, 14, 28.
both have 4 as a factor and it is the greatest factor they have in common so it is the GCF.
GCF of 20 and 28: 4.
7.3m questions
9.7m answers