Topics: Whole Numbers, Ratio, Percentages. Heuristics: This lesson focuses on problem-solving strategies such as Working Backwards, Before and After, Grouping, Trial and Error, and Assumption Method. About This Course This course, PSLE Express Revision, is designed to solidify key concepts and address common problem areas right before the PSLE. Lessons are structured around community-submitted questions, ensuring the content is highly relevant and targeted. Each 30-40 minute lesson breaks down 3 to 5 challenging questions, providing direct explanations and teaching the underlying methodology. The goal is to provide efficient, targeted guidance that helps students understand the "how" and "why" behind each solution, equipping them for exam success.