What is the gcf of 39 and 42
the answer is 3 because it goes into 39 and 42 and 6 doesn't go into 39
To get the Greates Common Factor (GCF) of 39 and 42 we need to factor each value first and then we choose all the copies of factors and multiply them:
39: 3 1342: 2 3 7GCF: 3
