## anonymous 3 years ago Can anyone show me how to find the GCF of 72 and 78?

1. anonymous
2. anonymous

Hello, thanks for responding to my question.

3. anonymous

Are you there?

4. anonymous

Hello and thanks for responding

5. anonymous

$72 = 2 \times 2 \times 2 \times 3 \times3$$78 = 2 \times 3 \times 13$what factors do 72 and 78 have in common?

6. anonymous

2 and 3

7. anonymous

so GCF = 2 * 3 ~

8. anonymous

Wowwww, so its the numbers 2 and 3, not just one of the numbers?

9. anonymous

2 times 3 = 6 = gcf ~ 6 is the gcf

10. anonymous

So is 6 the GCF for both numbers

11. anonymous

yes

12. anonymous

now that was a little confusing!! lol

13. anonymous

72 can divide by 1, 2, 3, 4, 6, 8, 12, 18, 24, 36, 72 78 can divide by 1, 2, 3, 6, 13, 26, 39, 78. so 6 is the greatest common factors

14. anonymous

the way i did earlier was |dw:1348610984777:dw|

15. anonymous

I got all your notes.. I have one more of these... GCF of 42 and 48.. I'm going to post this question. Maybe you will be able to come back.

16. anonymous

we can do that here if you want ~ ur turn to write down factors of 42 and 48, or all the numbers they can divide

17. anonymous

when I add another question , it doesn't save the second question to my file/folder. I need to post the question, Give me a second.