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In Challenge And Thrill Of Pre-College Mathematics, the authors have attempted to enrich the mathematical knowledge of the students in interesting ways, without making the subject boring and cumbersome. Summary Of The Book Challenge And Thrill Of Pre-College Mathematics has been written for students studying in classes 9 to 12. The book attempts to entice them into enjoying mathematics and solving mathematical problems. The authors have attempted to make the book and the subject, interesting, so as to motivate the students who dislike the subject, into enjoying it. For those students who already like mathematics, the book provides an interesting and innovative treatment of the topics covered. Challenge And Thrill Of Pre-College Mathematics has been written in a comprehensive manner. This book will help children develop a sound mathematical way of thinking. The first chapter of the book is titled Number Systems. This chapter introduces students to the various classes of numbers. The second chapter, Arithmetic of Integers, throws light on divisibility and the principle of induction. The next chapter, Geometry: Straight Lines and Triangles, and the fourth chapter, Geometry: Circles, covers tangents, constructions, and cyclic quadrilaterals. This is followed by a chapter on Quadratic Equations and Expressions. These are followed by chapters on Trigonometry, Coordinate Geometry of Circles and Straight Lines, Linear Equations, Permutations and Combinations, Polynomials, Elementary Combinatorics, Inequalities, Beginnings of Number Theory and the Probability Theory, Finite Series, and De Moivre’s Theorem and the Applications of the Theorem. These chapters are followed by a chapter titled Miscellaneous Problems. The authors have provided more than 300 hundred worked out problems, many of which have been taken from national and international Olympiad papers. About The Authors V. Krishnamurthy was the Professor of Mathematics and also the Deputy Director of BITS Pilani. He is the Director of K. K. Birla Academy. Combinatorics: Theory and Applications, Introduction to Linear Algebra, and Culture, Excitement and Relevance Of Mathematics are some of the books he has written. C. R. Pranesachar taught at the SDGS College. Another book by him is Mathematical Challenges From The Olympiads. He is a Scientific Officer of the Mathematical Olympiad Cell, National Board of Mathematics. B. J. Venkatachala previously taught at Kuvempu University in Karnataka. Like Pranesachar, he is also a Scientific Officer of the Mathematical Olympiad Cell. He has also written the book titled Problem Primer For The Olympiad. K. N. Ranganathan is a Professor of Mathematics at Chennai’s Rama Krishna Mission Vivekananda College. All four authors have been involved in training the national Olympiad team since 1988.