Our February Insights puzzle sent readers on a treasure hunt based on complex numbers. First we provided a bit of a primer, demonstrating that complex numbers (expressions of the form a + bi, where ...

Learn about and revise different types of numbers such as primes, factors, multiples and powers with this BBC Bitesize GCSE Maths Edexcel guide.

Imaginary numbers—the square roots of negative numbers—are an inescapable part of quantum theory, a study shows ...

In spite of their name, “imaginary” numbers are as real as any other numbers, especially when it comes to hunting for lost treasure.