A cable of 80 meters is hanging from the top of two poles that are both 50 meters off the ground. What is the distance between the two poles (to one decimal point) if the center cable is (a) 20 meters off the ground and (b) 10 meters off the ground?
Presh Talwalker of Mind Your Decisions says the above riddle was used as an Amazon interview question. His video has the answer.
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 […]
Mathematician, artist, and engineer George W. Hart of “Möbius strip bagel” fame has recently been playing with a laser cutter to create head-spinning warped-grid jigsaw puzzles. He came up with an algorithm to generate the initial patterns but “the real fun is step 2,” he says, “using a geometric transformation to warp things.”
Portland Laser Co. offers a puzzle based on Joy Division’s famous cover to Unknown Pleasures, a plot of signals emitted by pulsar CP 1919. Yours for $50. One of the most iconic album covers of all time, made into a puzzle.
In case you’re one of those computer shoppers who instinctively turns up their nose at the very mention of the word refurbished, here are a couple myths worth dispelling. Refurbished equals junk somebody didn’t want. While desktops, laptops, notebooks, Chromebooks and tablets marked as refurbished may have been unboxed at some point, meaning they can […]
Electric bikes aren’t toys. And they aren’t a fad. In fact, more and more communities are starting to catch on that e-bikes are a lot more than an amusing gadget for the tech geek. Following a six-month study, Johnson County, Kansas, home to many Kansas City suburbs, became just the latest U.S. community to allow […]
Whether you’re living in a city that has already taken measures to reduce plastic bag use, the small silver lining of the pandemic has inspired you to make changes, or you’ve already started living a greener lifestyle, reusable produce bags are a great addition to your shopping routine. And if you’re going to invest in […]