It’s never too early for math sequence riddles. Veritasium‘s Derek Muller offered a selection of strangers a simple sequence of three numbers — 2, 4, 8 — and asked them to determine the rule governing ...

Some of the most satisfying number puzzles require little mathematical know-how. In fact, cracking the one below calls for thinking that is quite nonmathematical. I don’t know where or when I first ...

But, both of these would require large structural changes for a course that teaches hundreds of students a year — something that can’t really happen in the near term. What could happen now, though, is ...