Here's a fun puzzle explained to us by math writer Alex Bellos (but invented by mathematician Henry Ernest Dudeney) that you can try with six coins. First line them up like this:
Now see if you can arrange them in a circle with only three moves. The two rules: you can slide them but not pick them up, and you must move them to a position where they are touching two other coins.
Here is a video explaining the rules a bit more, but spoiler alert: don't go past 2:37 unless you want to see how it's done.
Martin Raynsford makes beautiful and intricate wooden puzzles with space-filling fractal curves and is kickstartering a set of four. The pattern is a single line that crosses all of the two dimensional space without ever repeating. The puzzles follow these simple rules to break the line into multiple pieces that are almost identical but are […]
Here are three two lateral thinking puzzles that were new to me. They’re from the book, Lateral Thinking Puzzles (1991), by Paul Sloane. Death in the Field A man is lying dead in the field. Next to him is an unopened package. There is no other creature in the field. How did he die? Death in Rome […]
One of my favorite puzzle books as a kid was Perplexing Puzzles and Tantalizing Teasers, by Martin Gardner. It had fun “real life” type problems (how can you drive an 11-foot-9 truck under a bridge with 11-foot-8 clearance?) and it introduced me to palindromes (“Straw? No, too stupid a fad. I put soot on warts.”) […]
It’s 4/20! Smoke ’em if you got ’em – and if you haven’t got ’em, check out this roundup of deep discounts on pipes and other accessories. They’re all on sale, but you can take an extra discount off the final price courtesy of the Boing Boing store by using the online code 420SAVE. Freeze […]
Ever wonder if you’re cleaning your teeth well enough? If your last dentist visit has you getting a little more thorough about oral care, it might be time to save yourself some guesswork. A lot of electric toothbrushes promise deep cleaning, but there’s a Platinum Sonic Toothbrush that has power plus the simple but effective […]
The digital age is well and truly upon us, but let’s not forget there’s a load of free TV content floating literally over our heads. No, we’re not talking about the internet. Signals from major broadcast networks are still gratis for anyone who can pick them up with an antenna. And before you envision those […]