Discrete Mathematics is a foundational pillar in computer science and mathematics, providing essential tools and frameworks for logical reasoning, algorithm design, and data structure development. For students pursuing the BCA program at the Indira Gandhi National Open University (IGNOU), mastering this subject is vital for academic and professional success. With this in mind, "IGNOU BCA Discrete Mathematics Previous Year Unsolved Papers MCS 013" has been compiled to offer learners a practical and focused approach to exam preparation by engaging them directly with real, unsolved questions from past examinations. 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.