Telling time is easy. But telling time on an analog clock with no numbers and indistinguishable minute, second, and hour hands that has also been rotated to a random position? Well, that’s a little ...

On his popular YouTube channel, MindYourDecisions, mathematician Presh Talwalkar frequently digs up samples of classic college entrance exams. Talwalkar challenges his followers to see how they’d fare ...

Like Liam Neeson in Taken, Presh Talwalkar has a very specific set of skills. They don’t (as far as we know) include hunting down kidnappers and dispatching them in increasingly gruesome and ...

Here at Mental Floss, we love a good brain teaser—and clearly we’re not alone. From cows and chickens to river crossings, we’ve never met a riddle we didn’t want to solve—even if it was originally ...

Math isn't everyone's best skill — and even those who are good at it are questioning everything after trying this algebra problem. The question originally went viral in Japan, after a study discovered ...

On his YouTube channel Mind Your Decisions, Presh Talwalkar shares logic puzzles dealing with geometry, statistics, and algebra. The puzzle below from the former Stanford math and economics student ...

Almost exactly a year ago, I posed a card puzzle here that sparked a frenzy in the comments section. The solution to that puzzle was so counterintuitive that several readers rejected it outright. In ...

Tech giant Amazon reportedly poses a series of logical and mathematical puzzles during the interview process in order to select the best candidates, including the following lottery scenario. Take your ...