Question

What is the greatest common factor for 9 and 27

Answer 1

to find GCF

factor:

9: 1, 3, 9

27: 1, 3, 9, 27

GCF = 9

prime factorization

9: 3 x 3

27: 3 x 3 x 3

GCF = 3² = 9

Answer 2

The answer would be: 9

GCF of 9 and 27 by Listing Common Factors
There are 3 common factors of 9 and 27, that are 1, 3, and 9. Therefore, the greatest common factor of 9 and 27 is 9.