Impossible Puzzles That May Break Your Mind

How many can you solve? Special thanks this month to: Kyle, Daniel Lewis, Lee Redden. Thanks to all supporters on Patreon and YouTube! http://www.patreon.com/mindyourdecisions https://www.youtube.com/@MindYourDecisions/join 0:00 intro 0:27 puzzle 1 3:14 puzzle 2 4:39 puzzle 3 8:13 puzzle 4 12:27 puzzle 5 16:07 puzzle 6 Puzzle 1 https://www.herngyi.com/blog/geometric-dissection-puzzle Puzzle 2 https://math.stackexchange.com/questions/3785416/moving-coins-find-winning-strategy Puzzle 3 https://math.stackexchange.com/questions/460729/what-would-have-been-our-number-system-if-humans-had-more-than-10-fingers-try-t Puzzle 4 https://en.wikipedia.org/wiki/Zhoubi_Suanjing Puzzle 5 https://placewit.medium.com/color-of-the-last-ball-puzzle-for-interview-rounds-394b21cc649b https://braineaser.com/brainteasers/color-of-the-last-ball/ Puzzle 6 https://www.jstor.org/stable/2690116?read-now=1&seq=1#page_scan_tab_contents Cormier, Romae J., and Roger B. Eggleton. "Counting by Correspondence." Mathematics Magazine, vol. 49, no. 4, 1976, pp. 181–86. JSTOR, https://doi.org/10.2307/2690116. Accessed 14 Oct. 2025. The Number of Triangles Formed by Intersecting Diagonals of a Regular Polygon https://cs.uwaterloo.ca/journals/JIS/sommars/newtriangle.html Math StackExchange https://math.stackexchange.com/questions/2824697/how-many-triangles-are-there-in-the-picture-of-k-5-different-ways-to-count?noredirect=1&lq=1 https://math.stackexchange.com/questions/844830/how-many-triangles-are-see-in-complete-k5-graph OEIS https://oeis.org/A006600 Triangles counting https://www.math.uni-bielefeld.de/~sillke/SEQUENCES/triangle_counting Number of triangles made by diagonals of regular n-gon https://www.math.uwaterloo.ca/~mrubinst/publications/ngon.pdf Complete graphs https://commons.wikimedia.org/wiki/File:Complete_graph_K6.svg https://commons.wikimedia.org/wiki/File:Complete_graph_K7.svg https://commons.wikimedia.org/wiki/File:Complete_graph_K8.svg https://commons.wikimedia.org/wiki/File:Complete_graph_K9.svg Members get early access to videos YouTube members https://www.youtube.com/channel/UCHnj59g7jezwTy5GeL8EA_g/join Patreon members https://www.patreon.com/mindyourdecisions Support the channel with a one-time donation https://www.paypal.com/donate/?hosted_button_id=REZRY3QRQPYQA Subscribe: https://www.youtube.com/user/MindYourDecisions?sub_confirmation=1 Send me suggestions by email (address at end of many videos). I may not reply but I do consider all ideas! If you purchase through these links, I may be compensated for purchases made on Amazon. As an Amazon Associate I earn from qualifying purchases. This does not affect the price you pay. Book ratings are from January 2025. My Books (worldwide links) https://mindyourdecisions.com/blog/my-books/#worldwide 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 564 reviews http://amzn.to/1uQvA20 "The Irrationality Illusion: How To Make Smart Decisions And Overcome Bias" rated 4.2/5 stars on 55 reviews http://amzn.to/1o3FaAg "40 Paradoxes in Logic, Probability, and Game Theory" rated 4.2/5 stars on 81 reviews http://amzn.to/1LOCI4U "The Best Mental Math Tricks" rated 4.3/5 stars on 148 reviews http://amzn.to/18maAdo "Multiply Numbers By Drawing Lines" rated 4.5/5 stars on 57 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 4.4/5 stars on 138 reviews http://amzn.to/1GhUUSH "Math Puzzles Volume 2" rated 4.2/5 stars on 45 reviews http://amzn.to/1NKbyCs "Math Puzzles Volume 3" rated 4.3/5 stars on 38 reviews http://amzn.to/1NKbGlp 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. My Blog https://mindyourdecisions.com/blog/ Twitter https://twitter.com/preshtalwalkar Instagram https://www.instagram.com/preshtalwalkar/ Merch https://teespring.com/stores/mind-your-decisions Patreon https://www.patreon.com/mindyourdecisions Press https://mindyourdecisions.com/blog/press