GCF = 3
for the values 15, 42, 45
Solution by Factorization:
The factors of 15 are: 1, 3, 5, 15
The factors of 42 are: 1, 2, 3, 6, 7, 14, 21, 42
The factors of 45 are: 1, 3, 5, 9, 15, 45
Then the greatest common factor is 3.
You can also find the GCF using
Prime Factorization or Euclid's Algorithm.
