MTG?s National Science Olympiad Previous Years? Papers book is a practice book for students preparing for SOF NSO 2025-26. Carefully curated by science experts, it helps students analyse skills and improve their preparation. It will boost confidence, identify areas of improvement, and familiarize students with the exam pattern and required knowledge for the SOF NSO exam. Offering a multitude of benefits, this book is an essential tool for students preparing for the 2025-26 NSO exam. 10 SOF NSO papers from the previous 5 years (2024-2020 ? Set A & B). 2 Model test papers for rigorous practice and self-assessment. (revised according to the latest pattern) OMR sheets are given after each practice paper for exam-like practice. Chapter-wise analysis of all papers to strengthen core concepts. Answer keys with hints and explanations are given for all questions.