This book is the second of a comprehensive two-book revision guide series especially written for Secondary 3 and 4 students who are preparing for their GCE 'O' Level Elementary Mathematics examination. It follows closely to the newly implemented Mathematics syllabus by the Ministry of Education. This two-book series covers all concepts and formulae taught in Secondary Mathematics that you would need to know. It contains: - Concise and important notes - Worked examples - Plenty of revision exercise questions which you may encounter in the examination - Complete worked solutions with detailed explanations to check your work.