This book, Mathematical and Computational Thinking and Analysis, is designed as a textbook for FYUGP Semester I, II, and III students across Science, Arts, and Commerce streams, as per NEP-2020. It presents core concepts such as logic, sets and number systems, theory of equations, statistics, probability, and geometry in a simple, accessible manner. With numerous solved examples, end-topic exercises, and multiple-choice questions, it supports foundational understanding and exam preparation. The author welcomes suggestions for improvement and extends gratitude to Walnut Publication for bringing this book to readers.