Thanks to Nahian for the suggestion! This is a difficult factorial problem. British Mathematical Olympiad 2002-2003 problem 5 https://bmos.ukmt.org.uk/home/bmo1-2003.pdf A Mathematical Olympiad Primer Paperback – 1 Aug. 2011 https://www.amazon.co.uk/Mathematical-Olympiad-Primer-Geoff-Smith/dp/1906001146/ Math Forum post http://mathforum.org/library/drmath/view/77092.html Math StackExchange post https://math.stackexchange.com/questions/2123011/find-all-positive-integers-a-b-c-to-the-equation-ab-abc Subscribe: null Send me suggestions by email (address in video). I consider all ideas though can't always reply! Like many YouTubers I use popular software to prepare my videos. You can search for animation software tutorials on YouTube to learn how to make videos. Be prepared--animation is time consuming and software can be expensive! Why are there comments before the video is published? Get early access and support the channel on Patreon https://www.patreon.com/mindyourdecisions If you buy from the links below I may receive a commission for sales. (As an Amazon Associate I earn from qualifying purchases.) This has no effect on the price for you. Show your support! Get a mug, a t-shirt, and more at Teespring, the official site for Mind Your Decisions merchandise: null My Books (US links) Mind Your Decisions: Five Book Compilation https://amzn.to/2pbJ4wR A collection of 5 books: "The Joy of Game Theory" rated 4.2/5 stars on 105 reviews http://amzn.to/1uQvA20 "The Irrationality Illusion: How To Make Smart Decisions And Overcome Bias" rated 3.6/5 stars on 10 reviews http://amzn.to/1o3FaAg "40 Paradoxes in Logic, Probability, and Game Theory" rated 4.1/5 stars on 20 reviews http://amzn.to/1LOCI4U "The Best Mental Math Tricks" rated 4.4/5 stars on 25 reviews http://amzn.to/18maAdo "Multiply Numbers By Drawing Lines" rated 4.5/5 stars on 16 reviews http://amzn.to/XRm7M4 Mind Your Puzzles: Collection Of Volumes 1 To 3 https://amzn.to/2mMdrJr A collection of 3 books: "Math Puzzles Volume 1" rated 4.5/5 stars on 30 reviews http://amzn.to/1GhUUSH "Math Puzzles Volume 2" rated 4.5/5 stars on 10 reviews http://amzn.to/1NKbyCs "Math Puzzles Volume 3" rated 4.5/5 stars on 8 reviews http://amzn.to/1NKbGlp Connect with me My Blog: https://mindyourdecisions.com/blog/ Twitter: https://twitter.com/preshtalwalkar Newsletter (sent only for big news, like a new book release): http://eepurl.com/KvS0r 2017 Shorty Awards Nominee. Mind Your Decisions was nominated in the STEM category (Science, Technology, Engineering, and Math) along with eventual winner Bill Nye; finalists Adam Savage, Dr. Sandra Lee, Simone Giertz, Tim Peake, Unbox Therapy; and other nominees Elon Musk, Gizmoslip, Hope Jahren, Life Noggin, and Nerdwriter.