Some say the reason most manhole covers are round is that a circle cannot fall through a smaller circular hole. Which of ...

Brain teaser puzzles test the reader's critical thinking and problem-solving skills by challenging them to solve a problem.

Math is not everyone’s favorite, understandably. Hours of math homework and difficult equations can make anyone sour on the subject. But when math problems are outside of a school setting, there’s no ...

Brain teasers are excellent puzzle games for providing the brain with an effective mental workout. This math puzzle is a type ...

Brain teaser puzzles test the reader's critical thinking and problem-solving skills by challenging them to solve a problem.

The following is adapted from the introduction to “The Riddler: Fantastic Puzzles from FiveThirtyEight,” published by W. W. Norton & Co. It is in stores today! The world’s oldest collection of math ...

Imagine someone handing you a scrap of net from a basketball hoop, with knotted red cord attached to the netting, and telling you this bit of string is a clue in a puzzle. How quickly — if ever — ...

Two years ago, Nervous System set out to bring the jigsaw puzzle into the 21st century. Today, they’ve launched a series of puzzles designed with biomimicry software. The oldest jigsaw puzzles were ...