Deep Priya Dhillon, R. S. Dhillon and P. K. Garg’s Perfect PSA Problem Solving Assessment with Answers / Solutions / Explanations (Class 9) 2nd Edition is a comprehensive book for class 9 exams. The book comprises of relevant study material, solved examples, multiple choice questions and practice papers for students. In addition several sections that help in making a clear understanding of various concepts. This book is essential for candidates giving their class 9 CBSE exams. This book is also helpful for candidates attempting competitive examinations for an understanding and practice of Quantitative Reasoning, Qualitative Reasoning and Language Conventions.