The focus of this book is on meeting the Mathematical needs of students in Senior High Schools who will be taking the West Africa Senior School Certificate Examination (WASSCE) and students preparing for the Private Candidates Examination. For the reason that the student-teacher ratio is uncomfortably high in our SHS, individual attention to students in the classroom is generally not practicable. Hence, the need for text books written for SHS to be necessarily detailed as this book to enable students follow it independently without any supervision. This book is also written to serve as an introductory text for undergraduates and other tertiary students.