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, ...

Once a century, a very special day comes along. That day is today — 9/16/25. 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.

An analysis of the year 2025 as a perfect square year circulated widely on social media, drawing attention to its mathematical significance, according to El Tiempo. 2025 is a perfect square, equal to ...