Question

How do I find the greatest common factor of something like 117 and 195? Whats the easiest way?

Answer 1

write down the prime factors of both
GCF is the product of common factors

Answer 2

List the factors of both numbers
117: 1 3 9 13 39 117
195: 1 3 5 13 15 39 65 195

Biggest one looks to be:
39

Answer 3

numbers that go into 117?

Answer 4

117=3*3*13
195=5*3*13
GCF=3*13=39

Answer 5

thank you!

Answer 6

my brain is so slow at this lol

Answer 7

u got it? slow or fast doesnt matter much

Answer 8

so I list all the numbers that can go into 117?

Answer 9

once u learn the technique, with practice u would be fast in calculations too

Answer 10

I have been out of school for awhile

Answer 11

I hope one day I can grasp this as well as you!