Practice Makes Perfect: O-Level Principles of Accounts (Mock Examination Papers) is written based on the latest syllabus (7087) for students taking the O-Level examination from 2021. This book comprises 13 mock exams, each consisting of Paper 1 and Paper 2. Each mock exam paper contains a wide range of carefully crafted questions for students to practise and familiarise themselves with the format and type of questions that may be encountered in tests and examinations. This acclimatises students to examination conditions where they face difficulties when tackling various topics in one sitting. Complete work solutions are found at the end of the book to facilitate self-revision and assessment. Students are recommended to try out the questions and check their answers against the work solutions provided.