This book serves as more than just a repository of previous year question papers—it is a challenge-driven resource designed to strengthen problem-solving skills and deepen conceptual understanding. The unsolved format encourages independent thinking, critical analysis, and active learning. By working through these carefully selected questions, students can enhance their familiarity with exam patterns, identify key topics, and build the confidence necessary to tackle even the most complex problems in discrete mathematics. We are grateful to the educators and learners whose feedback and insight have helped shape this book, and we hope it becomes a valuable companion in your academic journey.