This book is tailored for individuals preparing for the NDA/NA examination administered by the U.P.S.C for recruitment into the Indian Army, Indian Navy, and Indian Air Force. It is structured into two sections: Mathematics (Paper I) and General Ability (Paper II), encompassing English, General Knowledge, and General Science. Each chapter provides a concise theory section followed by concept-based practice questions and solved papers from exams held between 2017 and 2023. We are confident that this book will serve as a valuable asset for all NDA/NA candidates. \nKey Features: \nAbundant practice questions complemented by comprehensive theoretical explanations \nDetailed solutions for all questions \nSolved papers of the 2023 exam.