Question

Find the greatest common factor of each set of numbers

28 and 40
40 and 48
63 and 135
12,18 and 26
54,72 and 90

Answer 1

Here are the greatest common factors (GCF) for each set of numbers:

1. GCF of 28 and 40: 4
2. GCF of 40 and 48: 8
3. GCF of 63 and 135: 9
4. GCF of 12, 18, and 26: 2 (Since 26 doesn't have any common factors with 12 and 18)
5. GCF of 54, 72, and 90: 18 (The largest factor that all three numbers share)