Conquer the highly competitive math portion of the Union Public Service Commission (UPSC) defense screenings with Mathematics for NDA/NA (National Defence Academy and Naval Academy) Entrance Examination (Revised Edition), written by the country's leading aptitude authority, Dr. R.S. Aggarwal. Published by S. Chand Publishing, this premier textbook serves as the ultimate all-in-one prep manual for aspirants targeting elite careers in the Indian Armed Forces. The text systematically breaks down the entire NDA curriculum into accessible, concept-driven chapters—covering critical modules like Algebra, Matrices and Determinants, Trigonometry, Analytical Geometry, Differential and Integral Calculus, Vector Algebra, and Probability/Statistics. It bridges the gap between fundamental concepts and actual test conditions by packing a massive treasury of mock questions, objective-type practice sets, and time-saving calculation shortcuts, alongside an authentic solved previous year paper to clarify examiner trends. Indispensable for establishing exceptional test-taking speed, error-free accuracy, and absolute mental confidence under time pressure, this reference guide is a vital cornerstone addition to any serious defense candidate's study table.