An optical illusion is a visual phenomenon where our eyes perceive something differently from reality, tricking the brain into misinterpreting what it sees. These illusions occur because the brain ...

Sudoku is a number puzzle consisting of a 9 x 9 grid in which some cells contain clues in the form of digits from 1 to 9. The solver’s jobs is to fill in the remaining cells so that each row, column ...

Why should we care about problem solving activities for high school students? What’s the fastest way to get to and from work? How can I complete a task more efficiently? What should I have for lunch ...

A problem doesn't last a lifetime. But how you deal with it can make it linger for years without resolution. In my studies about the topic, I've identified that, in addition to everything that ...

In 1950 Edward Nelson, then a student at the University of Chicago, asked the kind of deceptively simple question that can give mathematicians fits for decades. Imagine, he said, a graph — a ...