From our friends at Futility Closet:
Here are a penny and a quarter. Make a statement. If your statement is true, then I’ll give you one of these coins (not saying which). But if your statement is false, then I won’t give you either coin.
Raymond Smullyan says, “There is a statement you can make such that I would have no choice but to give you the quarter (assuming I keep my word).” What statement will accomplish that?
Answer is here.
Take a look at the sequence. What number comes next? The answer is a no brainer – once you know the answer, that is. Neil Sloane, founder of the Online Encyclopedia of Integer Sequences, starts explaining the answer at :22, so pause before then if you need more time to figure it out. Extra footage […]
Created by esteemed riddler Edwin F. Meyer, co-author of The Gedanken Institute Book of Puzzles. (TED-Ed)
I bought the Dover edition The Moscow Puzzles in 2014, and it’s still one of my all-time favorite puzzle books. Here are a few samples: Book description: This is, quite simply, the best and most popular puzzle book ever published in the Soviet Union. Since its first appearance in 1956 there have been eight editions […]
Looking to upgrade that old laptop or tablet? Holiday sales may be way on the horizon, but there’s an even better way to get like-new tech for a steal. Here are 10 of our favorite deals on personal computers and gaming gear – refurbished, renewed or brand new. Acer Touchscreen 11′ Chromebook 16GB (Certified Refurbished) […]
Vape technology has been around long enough that vapers are starting to get picky about their gear. Luckily, so are we. From disposable models to cutting-edge touchscreen atomizers, there’s a vaporizer in this roundup to suit every taste. Hera 2 – World’s Most Advanced Dual-Use Vaporizer Choose between dry herb or oil extraction modes – […]
With enough practice and commitment, anyone can be a visual artist. But without the right instruction, that time spent honing your skills could seem like an eternity. If you really want to see where your talent can take you, you need sound fundamentals – and no matter what discipline or genre you lean toward, the […]