How do you find the greatest common factor of 12 and 18?

1 Answer
Dec 2, 2016

Answer:

Explanation:

Divide both the number with a common number starting with 2 or 3 or 5 or 7 ....or so on which can divide commonly to both of the number.

Here

#12 , 18 #
Divided both 12 and 18 by 2 hence #6, 9#
Further divided both 3 and 9 by 3 hence #2, 3#
Hence common factors are 2 and 3
#2*3=6#

And greatest common factor among all the common number is 3.
Hence answer is 6.