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Mathematics For C. D. S. Entrance Examination is a book written by R. S. Aggarwal for examinees of the combined defence services examination, to tackle the objective type mathematics questions. Summary Of The Book Mathematics For C. D. S. Entrance Examination is a book that covers the current syllabus for mathematics as drawn up for the combined defence service examination. The book covers a number of topics under sections like arithmetic, algebra, trigonometry, and statistics. Extensive examples have been included in this book of 670 pages. These examples help the aspirant to prepare for every possible question. Short cut methods have also been discussed in the book so that one can complete the sum in a shorter span of time. Some of the chapters in the book include Mensuration, Geometry, Trigonometry, Arithmetic, Statistics, Algebra and Coordinate Geometry. Other important topics include Lines and Angles, Parallel Lines, Simple Trigonometric Identities, Theorems, Quadratic Equations, Prime and Composite numbers, HCF and LCM, Remainder Theorem, Use of Trigonometric Tables, Surface Area and Volume of Cuboids. Previous years’ question papers and their solutions have been included to give the aspirant an idea about what kind of questions will be asked in the examination. Mathematics For C. D. S. Entrance Examination is an ideal reference guide for the aspirants of the combined defence service examination. About R. S. Aggarwal Dr. R. S. Aggarwal has been a professor of Mathematics and he has written numerous books on mathematics for various levels. Some of his popular books are Quantitative Aptitude For Competitive Examinations, A Modern Approach To Logical Reasoning, Secondary School Mathematics For Class 10, MATHEMATICS for MBA Entrance Examinations (Fully Solved), Foundation Mathematics For Class IX (For I.C.S.E. Schools) and Objective Arithmetic: SSC and Railway Exam Special. Born in 1946 in a village in Delhi, Dr. R.S. Aggarwal graduated from Kirori Mal College, New Delhi. He completed his MSc degree, and his PhD from Delhi University. He took voluntary retirement from his position as a Reader in 2003 from MMH College, Ghaziabad, which he had joined in 1999. Aggarwal has written more than 75 books.