Counting will get you nowhere. Try a little combinatorics instead. By Kenneth Chang A couple of weeks ago, I wrote about a viral math problem — 8÷2(2+2) = ? — that drew the disdain of many ...

Brain teaser: It may look easy, but this challenge is trickier than it appears to be, packed with hidden triangles that most people miss on the first try. A viral brain teaser on the internet has left ...

Brain teasers have long been enjoyed as a playful yet effective way to keep the mind sharp. They push people to think outside the box and even ignite friendly debates. Now, a new puzzle making the ...