Answer:
4
Step-by-step explanation:
20: 1, 2, 4, 5, 10, 20
8: 1, 2, 4, 8
Greatest common factor is 4!
Answer: 4
Steps
8 = 2^3
20 = 2^2 x 5^1
Factors Of 8
1, 2, 4
Factors of 20
1, 2, 4, 5, 10
