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 ...

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 ...

This month, we visit a trendy (but fictional) spa with an unusual feature: hot mud beds. You lay a plastic sheet on the mud. Then you lay your body upon the sheet. Without any direct contact between ...

Math Puzzle: Only intelligent minds can solve this math puzzle by finding the missing value in 17 seconds. Are you one of them? Try now! A math puzzle is a type of brain teaser that tests the reader's ...

I own a digital 24-hour clock (i.e., a military time clock) that displays in HH:MM format. Each digit uses the standard seven-segment display in which seven lights toggle on or off to form numbers, as ...

I’ve been out of school for decades, and I don’t spend my days solving equations (I’m more of a word person). Still, I like to think I have a solid grip on basic math: I can usually gauge whether a ...

Math Puzzle: In this math puzzle, the final number is missing. Do you have the most intelligent brain that can solve the math puzzle in 11 seconds? Test your math skills now! Math puzzles are a good ...

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 ...