The ancient Greeks wondered when “irrational” numbers can be approximated by fractions. By proving the longstanding Duffin-Schaeffer conjecture, two mathematicians have provided a complete answer. The ...

Since the early 1970s, Hewlett-Packard pocket calculators have proved popular with students, scientists and engineers. Most of their scientific calculators let you show more digits after the zero. For ...

Still using your phone to tot up numbers? Learn how to <a style="text-shadow: none;" href="https://www.wired.co.uk/news/archive/2010-01/05/london-zoo%27s-annual ...