In the third century BCE, Apollonius of Perga asked how many circles one could draw that would touch three given circles at exactly one point each. It would take 1,800 years to prove the answer: eight ...

These student-constructed problems foster collaboration, communication, and a sense of ownership over learning.

Ever wondered how your mind deals with complex sums and multiplications? A new study has imaged how the brain's activity levels change while taking on serious math problems, and reveals for the first ...