Jeff Smith's Math Puzzle for November 21, 2025 - ‘We fired our cannon 'til the barrel melted down, so we grabbed an alligator ...

You have an exceptionally fast brain with an IQ of 140+ if you can solve this math puzzle in just 7 seconds. Put your brain ...

You are participating in a holiday gift exchange with a few classmates. You each write down your own name on a slip of paper and fold it up. Then all the students place their names into a single hat.

A new paper shows ChatGPT-5 emerging as a tool that helps scientists test ideas, navigate literature and refine experiments ...

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

Marijn Heule turns mathematical statements into something like Sudoku puzzles, then has computers go to work on them. His ...

The encrypted puzzle has stumped cryptanalysts for decades, and on the eve of an auction revealing the long sought-after ...

Rocky Point High School math teacher Jay Rand likes to challenge his students with a classic head-scratcher on the first day of class: Sum up the digits from 1 to 100, without counting.

A brain teaser is a short, playful puzzle designed to make your mind stretch and smile. It could be a riddle, a tricky question, a visual illusion, or a logic twist that nudges you to think beyond the ...

Stage 5: Justify thinking. A vital habit that many students need to solidify is recontextualizing after they solve ...

A few years ago, a little online puzzle called Wordle unexpectedly became a global ritual. Even if you never played it, you ...