I have shared puzzles based on arithmetic in previous posts. They generated quite a bit of correspondence, acknowledging both their challenging nature and the possibility of different solutions to the ...

Welcome to The Riddler. Every week, I offer up problems related to the things we hold dear around here: math, logic and probability. Two puzzles are presented each week: the Riddler Express for those ...

In the April Insights puzzle, I tried to guide readers down a path that might be best described as “experimental mathematics.” The goal was to rediscover two constants by iterating simple arithmetic ...