Which point is "closest" to 4 friends? Thanks to Chanul for suggesting this problem, which is adapted from a Sri Lankan Olympiad question. Special thanks this month to: Michael Anvari, Kyle. Thanks to all supporters on Patreon!
Plastria, Frank. (2006). Four-point Fermat location problems revisited. New proofs and extensions of old results. IMA Journal of Management Mathematics. 17.
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My Books (worldwide links)
My Books (US links)
Mind Your Decisions: Five Book Compilation
A collection of 5 books:
"The Joy of Game Theory" rated stars on 97 reviews
"The Irrationality Illusion: How To Make Smart Decisions And Overcome Bias" rated stars on 9 reviews
"40 Paradoxes in Logic, Probability, and Game Theory" rated stars on 18 reviews
"The Best Mental Math Tricks" rated stars on 20 reviews
"Multiply Numbers By Drawing Lines" rated stars on 14 reviews
Mind Your Puzzles: Collection Of Volumes 1 To 3
A collection of 3 books:
"Math Puzzles Volume 1" rated stars on 27 reviews
"Math Puzzles Volume 2" rated stars on 9 reviews
"Math Puzzles Volume 3" rated stars on 7 reviews
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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.