AMC8 2017 Q19 Factorial Factorisation

Welcome to my solutions video to the American Mathematics Competition 8 - AMC 8, this one is question 19 from the 2017 paper. This will test you ability to not just understand factorial functions - but to manipulate them and pull out factors.
The AMC is a great way to test your math skill and knowledge, but practice for most students is advised!
Watch this video series to find worked solutions, extra tips, extension problems and other observations. Please like and comment, and of course subscribe as I will be uploading a new video solution each week. Check out my playlists for previous exams and maths challenge solutions.
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