Welcome to The Riddler. Every week, I offer up problems related to the things we hold dear around here: math, logic and probability. There are two types: Riddler Express for those of you who want ...

Label the rectangles correctly with the letters A to I. Show puzzle solution Only the four blue-shaded rectangles below intersect three other rectangles, and therefore they must be F, G, H and I. H ...

From math to geometry, netizens explore theories for the perfect sandwich experience What's the most ideal way to cut a sandwich? Do you cut it straight down the middle to make two rectangles or ...