When you pass, traditionalists say, three things can happen and two of them are bad -- completion, incompletion or ...

What started as a 50-point class project has become a published tool for changing how students think about mathematics.

Looking for riddles that will truly challenge you? These brain-teasers for adults (with answers) cover all levels of logic, ...

A jigsaw puzzle company wants to design a new rectangular puzzle with a specific quirk: it must have the same number of edge ...

A short riddle presents a situation that appears straightforward at first glance. Three individuals enter a space, yet only ...

Have you ever wondered whether mathletes can go pro? Since 1959, the answer has been “yes” – with the height of achievement ...