This book explores the relationship between achievement motivation and problem-solving ability in mathematics among Class IX students in the Dindigul district of Tamil Nadu. Through a structured study, it analyzes how students' motivation levels influence their mathematical thinking and problem-solving performance. The findings highlight key factors affecting learning outcomes and provide insights for educators to enhance teaching strategies and student engagement in mathematics. This work is valuable for teachers, educational researchers, and policymakers aiming to improve mathematics education at the secondary level.