What is a set of three different numbers that have a GCF of 9 explain?

Answer 1

9, 18 and 27

The factors of 9 are:

1, 3, 9

The factors of 18 are:

1, 2, 3, 6, 9, 18

The factors of 27 are:

1, 3, 9, 27

The common factors are:

1, 3, 9

The Greatest Common Factor:

GCF = 9

Answer 2

The set {18, 27, 900}

18 = 9*2

27 = 9*3

900 = 9*100

2 and 3 are co-prime and so GCF(2, 3, 100) = 1

Therefore the greatest common factor is 9.