Question

What is the greatest common factor GCF of 45 and 81?

Answer 1

• 9

Explanation:

Factor of 45: → 1, 3, 5, 9, 15, 45

Factor of 81: → 1, 3, 9, 27,81

Therefore, GCF of 45 and 81 is 9

~

Answer 2

GCF = 9

for the values 45, 81

• Solution by Factorization:

The factors of 45 are: 1, 3, 5, 9, 15, 45

The factors of 81 are: 1, 3, 9, 27, 81

Then the greatest common factor is 9.