This book has been written specifically for the A1 Discrete module (D1) of the AQA mathematics specification. The book has been designed to be an easy to use introduction to discrete mathematics. Each chapter starts with a short list of learning objectives and mathematical ideas are explained carefully and clearly, with many stimulating worked examples. There are plenty of exercises throughout, along with revision exercises and mock exam papers. Discrete Mathematics 1 for AQA introduces algorithms, networks and graphs, spanning tree problems, matchings and a variety of optimisation problems. It concludes with work on linear programming.