How do you find the greatest common factor of #140n, 140m^2, 80m^2#?

1 Answer
Dec 11, 2016

Answer:

Factorize. But you can see at a glance that the letters have no common factor.

Explanation:

So we're left with finding the GCF of #140,140,80#

#140=7xx20and 80=4xx20#

So the GCF #=20# (no common factors between #4# and #7#)

Note:
Of course you could factorize all the way down to the primes:

#140n=2xx2xx5xx7xxn#, etc.