The 2017 GCSE exam featured a problem like this that confused many students. Learn how to solve it using Al-Kashi's Theorem.
Sources
Emailed to me by Tom, Ben and James (GCSE 2017 exam)
[ Ссылка ]
Subscribe: [ Ссылка ]
Playlist to watch all videos on MindYourDecisions: [ Ссылка ]
Send me your favorite puzzles/suggestions by email (address in video). I get so many emails that I may not reply, but I save all suggestions.
This is the only channel to feature math topics suggested by people around the world. Support on Patreon to inspire mathematical discovery and make the world a better place:
[ Ссылка ]
If 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:
[ Ссылка ]
My Books
"The Joy of Game Theory" shows how you can use math to out-think your competition. (rated 4.0/5 stars on 41 reviews)
[ Ссылка ]
"The Irrationality Illusion: How To Make Smart Decisions And Overcome Bias" is a handbook that explains the many ways we are biased about decision-making and offers techniques to make smart decisions. (rated 3.5/5 stars on 4 reviews)
[ Ссылка ]
"Math Puzzles Volume 1" features classic brain teasers and riddles with complete solutions for problems in counting, geometry, probability, and game theory. Volume 1 is rated 4.4/5 stars on 13 reviews.
[ Ссылка ]
"Math Puzzles Volume 2" is a sequel book with more great problems. (rated 4.5/5 stars on 6 reviews)
[ Ссылка ]
"Math Puzzles Volume 3" is the third in the series. (rated 4/5 stars on 6 reviews)
[ Ссылка ]
"40 Paradoxes in Logic, Probability, and Game Theory" contains thought-provoking and counter-intuitive results. (rated 4.4/5 stars on 13 reviews)
[ Ссылка ]
"The Best Mental Math Tricks" teaches how you can look like a math genius by solving problems in your head (rated 4.8/5 stars on 5 reviews)
[ Ссылка ]
"Multiply Numbers By Drawing Lines" This book is a reference guide for my video that has over 1 million views on a geometric method to multiply numbers. (rated 4.3/5 stars on 6 reviews)
[ Ссылка ]
Connect with me
My Blog: [ Ссылка ]
Twitter: [ Ссылка ]
Facebook: [ Ссылка ]
Pinterest: [ Ссылка ]
Tumblr: [ Ссылка ]
Instagram: [ Ссылка ]
Patreon: [ Ссылка ]
Newsletter (sent only for big news, like a new book release): [ Ссылка ]
