Students in Melissa Williams' kindergarten class at the Westminster School in Atlanta, Georgia, practice connecting quantities to written numbers — a key part of number sense. Credit: Holly Korbey for ...

A brain teaser is a type of puzzle or riddle designed to challenge your thinking and problem-solving skills. It often requires creative, logical, or lateral thinking rather than academic knowledge.

A brain teaser is like a fun little challenge for your mind. It’s a puzzle or riddle designed to make you think creatively and critically, often in ways you’re not accustomed to. At first glance, a ...

A variation of a puzzle called the “pick-up sticks problem” asks the following question: If I have some number of sticks with random lengths between 0 and 1, what are the chances that no three of ...

Brain teasers are a fun way to test one's thinking skills. These puzzles give the brain a quick workout. A recent challenge ...