Challenging Word Problems 5 5 - Primary Mathematics AKA Singapore Math Author:unlisted Includes graded, eorked examples, over 300 questionsand worked out solutions. 210pp; Table of contents: Whole Nymbers, Fractiona, Area and Perimeter, Area of Triangles, Ratios. Decimals, Volume, percentage, Angles and Triangles, Quadrilaterals, Average, Rate, Data Analysis, Mixed Problems, Answers.