6 and 15 numbers that go into 6 and 15 is 1,3. The GCF is 3
12 and 28 numbers that go into 12 and 28 is 1,2,4. The GCF is 4
24 and 64 numbers that go into 24 and 64 is 1,2,6, 8. The GCF is 8
35 and 55 numbers that go into 35 and 55 is 1,5. The GCF is 5
27 and 18 numbers that go into 26 and 18 is 1,3,9. The GCF is 9
