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The “Impossible” Handshake Logic Puzzle. A Martin Gardner Classic

Mr. Lars and his wife Mrs. Lars went to a meetup and met 4 other married couples. Some people shook hands with each other, but no person shook hands with his or her spouse, and no person shook his or her own hand. Mr. Lars then asked each person, including his wife, “How many distinct … Continue reading The “Impossible” Handshake Logic Puzzle. A Martin Gardner Classic Read more ›

The Pirate Riddle (Ft. TED-Ed). Game Theory Tuesdays

This is a fun puzzle that I have shared a few times before, including last year, and in connection with The Dark Knight. TED-Ed made an animated video and thought it was a good time to share again. Can you solve the pirate riddle? TED-Ed Here is a text description of the riddle. A group … Continue reading The Pirate Riddle (Ft. TED-Ed). Game Theory Tuesdays Read more ›

Tricky Interview Question – The Ratio Of Areas Of Squares. Sunday Puzzle

A square is inscribed in a circle. A smaller square is drawn; it shares a side with the large square, and its other two corners touch the circle. What is the ratio of the large square’s area to the small square’s area? I found this problem online, and the person who posted it said it … Continue reading Tricky Interview Question – The Ratio Of Areas Of Squares. Sunday Puzzle Read more ›

Why Does The Other Line Always Move Faster? Game Theory Tuesdays

Note: this is a statistics topic rather than a game theory post At the supermarket checkout, should you pick the shorter line or the line where people have fewer items? I have gotten into heated arguments with people who insist on a particular way. And yet, the discussion is actually moot since there is a … Continue reading Why Does The Other Line Always Move Faster? Game Theory Tuesdays Read more ›

What Number Doubles When Its Last Digit Becomes Its First Digit? Sunday Puzzle

If the last digit of this positive number becomes the first digit, the resulting number is exactly twice as large. My number is the smallest positive number with this property. What is my number? You might be able to find some numbers that almost work. 25 would become 52, which is close to 25(2) = … Continue reading What Number Doubles When Its Last Digit Becomes Its First Digit? Sunday Puzzle Read more ›

What Is 48÷2(9+3) = ? The Correct Answer Explained

What is the correct answer to the following expression? 48÷2(9+3) = The problem often generates debate and has millions of comments on Facebook, Twitter, YouTube and other social media sites to join the ranks as a meme. Watch the video where I explain the correct answer. What is 48÷2(9+3) = ? The Correct Answer Explained … Continue reading What Is 48÷2(9+3) = ? The Correct Answer Explained Read more ›

Book Recommendation – Introducing Game Theory: A Graphic Guide. Game Theory Tuesdays

I am thrilled to add another book to my list of the best game theory books. The book is Introducing Game Theory: A Graphic Guide by economists Dr. Ivan and Dr. Tuvana Pastine and illustrated by Tom Humberstone. I liked this book so much I am adding it as the 8th selection of the “top … Continue reading Book Recommendation – Introducing Game Theory: A Graphic Guide. Game Theory Tuesdays Read more ›