How do you find the greatest common factor of 68, 34?

1 Answer
EZ as pi
Dec 3, 2016

#GCF = 2xx17=34#

Explanation:

Write each number as the product of its prime factors then you can see what you are working with:

#" "34 = 2 xx " "17#
#" "ul(68 =2xx2xx17)#
#GCF = " "2 " "xx 17 = 34#

{notice that the GCF is the product of all the common factors.]

You could have known this immediately if you realise
that 34 is half of 68.

Related questions
See all questions in Greatest Common Factor
Impact of this question
2560 views around the world
You can reuse this answer
Creative Commons License