This reference book serves as a study guide to Diploma in IT students to study mathematics concepts and build problem-solving techniques. It provides short notes and key formulas for students to study algebra and calculus. Students are guided to problem solving through step-by-step worked examples. Review questions are also available for students to test their problem-solving skills and understanding of algebra and calculus concepts. Topics covered in algebra are equations, inequalities, sequences, and series. Topics covered in calculus are limits, continuity of a function, differentiation, and integration techniques. Students are guided to learn basic concepts in each topic, apply appropriate formulas and solve different types of problems in algebra and calculus. This book helps to train students to think in a logical way, develop their problem-solving skills which lays a strong foundation for them to advance in various fields of studies in computer science and information technologies.