50 Math Ideas: You Really Need to Know

In 50 short essays, Tony Crilly opens up the mathematical ideas that shape how we understand the world, from Pascal's triangle to the everyday business of money management, and from the leaps of relativity to the surprisingly real uses of imaginary numbers. Ancient and modern, theoretical and practical, esoteric and everyday sit side by side here, each explained clearly enough to read in a sitting. Taken together, it forms a wide-ranging introduction to the concepts that matter most in the history of mathematics.