Teach Yourself Mathematics Series are designed to simplify the teaching and learning of Mathematics in our School System. The volume one of the series is widely read and appreciated by students and teachers of Mathematics. It has been described as a veritable tool for the study of Mathematics. The volume two has been introduced to accommodate other topics required at the Senior Secondary School level. Some of the new topics are Calculus, Mathematics of Finance, Modular Arithmetic, Logic, Permutation, Combination etc. The book has been structured to enhance proper understanding of the topics by students and teachers. I therefore welcome you again to this interesting world of Teach Yourself Mathematics Series. The book is recommended for students preparing for Senior Secondary School Certificate Examinations, University Entrance Examinations, Colleges of Education students and for Pre-University study.