Approach this like a math puzzle —strategically and methodically. With each row containing six triangles, and a systematic count (from left to right and top to bottom), most people on the internet ...

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 ...

An optical illusion is a visual phenomenon where the brain perceives an image differently from how it physically exists. These illusions occur due to the way our eyes and brain process light, colour, ...