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Product details of Thinking Math For Primary 3 & 4 Step-by-step solutions included Available Designs: Pri 3/4, Pri 5/6, Heuristic Approach How good are you at Math? Take on these challenging problem sums written by Mathematics Olympiad Trainers and see how well you fare! You will be exposed to a wider range of mathematical problems that require various analytical and problem solving skills. If you really need help, there's always the step-by-step answers at the back.