Do You Know the Origin of the Expression: “Thinking Outside the Box”?

By Brenda Moore-McCann

Do you know the origin of the expression: “thinking outside the box”?

It is said to derive from a famous puzzle created by an early 20th century British mathematician Henry Ernest Dudeney.

The puzzle asks one to connect nine dots on a three-by-three grid, using four straight lines without the pencil leaving the page. Try it!

Click here for solution.