A maths exam question has proven so challenging that it left 85-per cent of people stumped while trying to solve it. The arrival of May marks the beginning of exam season, with millions of pupils ...

It’s surprisingly difficult to prove one of the most basic properties of a number: whether it can be written as a fraction. A broad new method can help settle this ancient question. In June 1978, the ...

Third grade was a long time ago, and many of us have forgotten even the most basic of principles. Fortunately, they’re pretty ...