This book is targeted for the Grade 3 students for strengthening their mathematical reasoning and analytical skills. It focuses on enabling students to think in an innovative manner. This reference book shall assist them in their preparation for International Mathematics Olympiad. The purpose of compiling this book is that the students must learn that mathematics is not just solving questions but to execute concepts of mathematics in practical life. The reasoning is also a part of Mathematics, and the child learns to analyze it from the early stages. The book enables to prepare fully for International Mathematics Olympiads.