This book, featuring a valuable collection of previous years' solved examination papers, has been specially published for candidates preparing for the National Defence Academy & Naval Academy (NDA/NA) Entrance Examination. The book includes numerous previous years' question papers with detailed solutions. All questions have been solved by subject experts, and several carefully selected challenging questions are accompanied by explanatory answers and simple problem-solving techniques. Through systematic study and practice, candidates will gain a thorough understanding of the nature and pattern of questions asked in the examination. Studying previous years' question papers not only helps candidates become familiar with the current examination pattern but also provides an excellent opportunity to assess their level of preparation. The detailed solutions included in the book guide candidates in effectively applying the knowledge they have acquired to answer examination questions accurately and confidently. By practicing the wide variety of questions included in the book, candidates can significantly enhance their analytical abilities, problem-solving skills, and speed. This comprehensive practice will enable them to approach the examination with confidence and maximize their chances of success.