I found this puzzle in a book I've had since I was a kid:
Simply put, your task is to draw the figure at the right without crossing a line, without taking your pencil from the paper and without retracing a line.
The book is called Merlin's Puzzler. It's out of print, but used copies are pretty cheap.
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.
Most parents know that giving their kids educational toys and other projects will expand their minds. But what many might not realize is that physical play is actually building their mental abilities as well. Studies are still in beginning stages, but some early research supports the theory that kids who get the chance to get […]
Not every house has a fireplace. And to be honest, not every homeowner wants to deal with the hassles and maintenance of a fireplace. But it’s tough to argue that the intoxicating glow and dance of a licking flame isn’t mesmerizing, not to mention all of a fire’s practical uses. For those looking to enjoy […]
Knowledge is power. And a company that knows who its customers are is far more likely to see those customers return. On the web, information gathering often comes in the shape of an online form. Whether it’s a registration, a contest, an order, or just a simple contact, those opportunities to engage with users and […]