What is the greatest common factor for 78 and 91?

1 Answer
Mar 31, 2016

#13#

Explanation:

To find the GCF you can proceed as follows.

Given two numbers, divide the larger by the smaller to give a quotient and remainder.

If the remainder is zero, then the smaller number is the GCF.

Otherwise repeat with the smaller number and the remainder.

So for #78# and #91# we proceed as follows:

#91 / 78 = 1# with remainder #13#

#78 / 13 = 6# with remainder #0#

So #13# is the GCF.