Question

Find the GCF of following please

1. 27 & 12
2. 12 & 36
3. 16 & 20
4. 2 & 8
5. 30 & 12
6. 42 & 49

Answer 1

To find the GCF, you can simply list out the prime factors of each number. Then, look for the greatest prime factor that the two numbers have in common.

1. GCF: 3
2. GCF: 12
3. GCF: 4
4. GCF: 2
5. GCF: 6
6. GCF: 7

Hope this helps! :)