Mode = the most frequently occurring number in the set. (Note: if there are multiple most frequently occurring numbers in a dataset, the mode is not unique. All modes in this puzzle are unique) Range ...

Jeff Smith's Math Puzzle for January 30, 2026 - Studying dodecagons in the dodecanese. The post Math Puzzle for January 30, ...

Here, count with me: 1, 2, 3, 4, 5, 6, 7, 8, 9, T, 11, 12 … Oh, what’s that? You write ten with “zero”? Fair enough. Zero, we have been told, is the ...

Brain teasers are an excellent way to keep your mind sharp and engage your problem-solving skills. Ranging from simple to complex, these puzzles offer a fun yet challenging way to give your brain a ...

Take the pressure off of problem-solving with engaging thinking games that encourage students to work together to find ...

It's a math puzzle designed for third graders, but many adults are having trouble solving it. The puzzle looks something like Scrabble, with a series of boxes that snake up, down and across a page.

This math puzzle brainteaser challenges readers to find the missing value in a simple arithmetic problem. Using the BODMAS rule, solve 6 + 6 + 6 + 6 * 0 within five seconds. Solving such puzzles ...

If the cards shown here are rearranged to form four new poker hands of five cards each, what is the lowest possible winning ...

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 ...