Here's how you do cube roots in your head! Avoid looking like Education Secretary Nicky Morgan who was stumped when asked to do a cube root: https://www.youtube.com/watch?v=x8CV0dfQMdUNote: the starting number needs to be a perfect cube. So it's more of a magic trick: ask someone to cube a number and then you can deduce their original number quickly.Check out my book "The Best Mental Math Tricks" (rated 4.7/5 stars on 4 reviews)http://amzn.to/18maAdo Can you multiply 97 by 96 in your head? Or can you figure out the day of the week when you are given a date? This book is a collection of methods that will help you solve math problems in your head and make you look like a genius. "The Best Mental Math Tricks" (rated 4.7/5 stars on 4 reviews)http://amzn.to/18maAdoH/T Mashablehttp://mashable.com/2014/12/12/education-minister-maths-question/Arthur Benjamin is a Professor at Harvey Mudd College and well-known for feats of mental calculation. He explains the cube root algorithm in this pdfhttps://www.math.hmc.edu/~benjamin/papers/Cubing.pdfThis trick is really old--here's a newspaper article from 1913 that explains the trick!http://cdnc.ucr.edu/cgi-bin/cdnc?a=d&d=SFC19130622.214.171.124.11Subscribe: https://www.youtube.com/user/MindYourDecisions?sub_confirmation=1Send me suggestions by email (address in video). I consider all ideas though can't always reply!Why are there comments before the video is published? Get early access and support the channel on Patreonhttps://www.patreon.com/mindyourdecisionsIf you buy from the links below I may receive a commission for sales. 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:https://teespring.com/stores/mind-your-decisionsMy BooksMind Your Decisions: Five Book Compilationhttps://amzn.to/2pbJ4wRA collection of 5 books:"The Joy of Game Theory" rated 4.1/5 stars on 44 reviewshttp://amzn.to/1uQvA20"The Irrationality Illusion: How To Make Smart Decisions And Overcome Bias" rated 3.5/5 stars on 4 reviewshttp://amzn.to/1o3FaAg"40 Paradoxes in Logic, Probability, and Game Theory" rated 4.4/5 stars on 13 reviewshttp://amzn.to/1LOCI4U"The Best Mental Math Tricks" rated 4.7/5 stars on 8 reviewshttp://amzn.to/18maAdo"Multiply Numbers By Drawing Lines" rated 4.3/5 stars on 6 reviewshttp://amzn.to/XRm7M4Mind Your Puzzles: Collection Of Volumes 1 To 3https://amzn.to/2mMdrJrA collection of 3 books:"Math Puzzles Volume 1" rated 4.4/5 stars on 13 reviews http://amzn.to/1GhUUSH"Math Puzzles Volume 2" rated 4.5/5 stars on 6 reviewshttp://amzn.to/1NKbyCs"Math Puzzles Volume 3" rated 4.1/5 stars on 7 reviewshttp://amzn.to/1NKbGlpConnect with meMy Blog: https://mindyourdecisions.com/blog/Twitter: https://twitter.com/preshtalwalkarNewsletter (sent only for big news, like a new book release): http://eepurl.com/KvS0r2017 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.