The Solvers of Riddles, Puzzles, and Problems

"What is this," I thought to myself, "another one of those silly internet arithmetic challenges?" At closer inspection, I could see it was more complicated than most of the others, as there were a much larger number of guesses in the comment section. There must be more than meets the eye. The challenge I was … Continue reading The Solvers of Riddles, Puzzles, and Problems

Face-Up Card Puzzle Explained

When I taught a 3-week intensive course for 6th-8th graders called The Beauty of Mathematics several years ago, I used many mathematical card tricks. Some of these mathematical card tricks are quite amazing when embellished for an audience. They were quite fun to perform, instruct how to perform, and then to break down and analyze. … Continue reading Face-Up Card Puzzle Explained

What U.S. States and Possessions Taught Me About Recursion

The 8 Possessions of the United States The first thing I learned on Friday was about all of the U.S. possessions. Can you name them all? I could have only named a few, and I would have incorrectly named a couple extra. Here they are in alphabetical order according to their abbreviation. AS: American SamoaFM: … Continue reading What U.S. States and Possessions Taught Me About Recursion