Tenyo is a Japanese magic trick company that's been around since 1960. They are well known for making clever props. (My friend Richard Kaufman, who often writes for Boing Boing, wrote a 1,400-page two-volume set about the company, called Tenyoism)
Here's a Tenyo puzzle trick called The Perpetual Puzzle (It's available on Amazon). You start by showing a rectangle made from 5 pieces. The rectangle fits snugly in a black plastic frame. Next, you show a sixth piece and combine it to the other five to make a larger rectangle. This rectangle also fits perfectly inside the frame. Finally, you show an even larger seventh piece, add it to the other six to form a rectangle. It, too, fits into the frame. How is it done? (If you know, please don't reveal the secret in the comments.)
Here’s a puzzle from Martin Gardner’s Mathematical Games column, which ran for many years in Scientific American. I found it in his low-priced Dover edition anthology, My Best Mathematical and Logic Puzzles. Imagine that you have three boxes, one containing two black marbles, one containing two white marbles, and the third, one black marble and […]
Simon Anthony is cohost of a sudoku YouTube channel called Cracking the Cryptic. In this video he solves a difficult sudoku puzzle with extra constraints. It’s really fun to watch him solve it and get more excited as his sense of wonder grows (“This is like the universe is singing to us,” he says as […]
Here’s a fun puzzle with an easy setup that makes for a good stay-at-home time-filler. Like sudoku, see if you can rearrange these cards so that no face or suit repeats itself in any column, row, or diagonal. Watch the video if you need some help.
Even though it feels like Amazon is a singular retail juggernaut crushing everybody else, you might be surprised to learn that half of Amazon’s $280 billion in revenue last year came from third-party sellers. According to numbers compiled by JungleScout, 86 percent of Amazon’s Fulfilled by Amazon (FBA) sellers were profitable last year, more than […]
Amidst all the deadly serious concern and fallout from our global battle against COVID-19, you’ve likely been forced to confront more than a few moments that you never expected to face. And you likely never felt sillier during this scary time than when you were racing all over town hoping desperately that some store had […]
“It’s better to have it and not need it than to need it and not have it.” – “Lonesome Dove,” Larry McMurtry If the past few months have taught us anything, it’s that we need to be prepared now more than ever. Emergency situations can happen quickly and there’s no telling when you may need […]