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A lovely riddle

A lovely riddle Can you solve this challenging Valentine's Day problem? Thanks to Stéphane from Belgium for the suggestion!

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Mind Your Decisions: Five Book Compilation

A collection of 5 books:
"The Joy of Game Theory" rated 4.2/5 stars on 159 reviews

"The Irrationality Illusion: How To Make Smart Decisions And Overcome Bias" rated 3.8/5 stars on 14 reviews

"40 Paradoxes in Logic, Probability, and Game Theory" rated 3.9/5 stars on 26 reviews

"The Best Mental Math Tricks" rated 4.4/5 stars on 42 reviews

"Multiply Numbers By Drawing Lines" rated 4.4/5 stars on 21 reviews


Mind Your Puzzles: Collection Of Volumes 1 To 3

A collection of 3 books:
"Math Puzzles Volume 1" rated 4.4/5 stars on 56 reviews

"Math Puzzles Volume 2" rated 4.3/5 stars on 18 reviews

"Math Puzzles Volume 3" rated 4.2/5 stars on 15 reviews


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.

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Valentine's Day,

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