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 ...

Calling all math enthusiasts and curious minds: 2025 isn’t just another year. It’s a milestone for lovers of numbers, logic, ...

Pi Day (3/14) often comes with sweet treats; Square Root Day (4/4/16 or 5/5/25, for example) has a certain numerical rhyme. But the particular string of numbers in today’s date may be especially ...

An analysis of the year 2025 as a perfect square year circulated widely on social media, drawing attention to its ...

The sequence of perfect square years starts all the way back at 1 AD, and continues at increasingly wider intervals. As the number nnn grows larger, the gaps between successive perfect square years ...