Mathematics Challenging Problems Primary 5 is part of a series of workbooks written according to the latest Mathematics Syllabus. Each problem is specially written to help you develop certain mathematical concepts and thinking skills so that you can use them to solve other mathematical problems. The exercises in this workbook are designed to help you in problem solving. Pay careful attention to the development of mathematical concepts that are presented in the worked solutions. Challenging questions have also been included in this workbook. These questions provide useful practices for the mathematical concepts and thinking skills that you have already mastered.