Find the GCF of these numbers: 20, 90

Asked by AnneS2 12 years ago 8/14/2013 3:35 AM

Last updated by anonymous 12 years ago 8/15/2013 9:06 PM

Answered by CherieS 12 years ago 8/15/2013 9:06 PM

Find the prime factors of both numbers

20=1*2*2*5

90=1*2*3*3*5

GCF=product of the shared factors=1*2*5=10