Whenever a student decides to prepare for a competitive examination, choosing an effective book to succeed is his/her biggest dilemma. This book aims at resolving this dilemma in two ways. One, it covers two major topics— Quantitative Aptitude and Reasoning; in a single volume. By encapsulating these two essential topics in one volume, this book makes it extremely easy for a student to grasp the fundamentals of the subject. And, two, this book contains the most comprehensive and detailed explanations to each and every topic. This book gauges the levels of various competitive examinations and accordingly discusses the topics in order to ensure the most effective comprehension by the students. It captures each topic and elucidates various question types to facilitate a deep understanding of the concepts such that the student is able to attempt all questions from these topics. This text is a definitive guide for anyone preparing for major competitive examinations such as cat, MAT, Bank PO, SSC, etc.