ACT Math: How to Find the Greatest Common Factor (GCF)
This video goes with my book The ACT Math Guide, which is free for Amazon Prime members ($9.99 if you don't have Prime). You can get the book at http://amzn.to/2iQNDFE or check it out on my website http://www.thetestuy.com/actbook.
Greatest Common factor is another "some tests" topic. It's a great point to get, and a good way to reinforce marking-off. Like I talk about in the book, you want to have a conversation with your answer choices.
Here's a couple of tips:
1. I go over prime factoring in the video. Don't use that on the ACT, it takes too long.
2. The BIGGEST the greatest common factor can be is the SMALLEST number in the set. Start with the smallest number in the set and work your way down to find the correct answer.
This video in the ACT Math Review deals with
Since I never remember to ask for it in videos, I'd love it if you liked and/or subscribed.
Good Luck,
Jacob