This book Pathfinder for Pre-Regional Mathematical Olympiad/Indian Olympiad Qualifiers in Mathematicsis designed specifically for the aspirants appearing for the PRMO and IOQM examinations. Sole aim and objective of this book is to help students develop a thorough understanding of Mathematics as a subject. The book is specifically designed to enhance and strengthen student's technical knowledge based on firm foundation of the fundamental principles. The book has been incorporated with exhaustive list of formulae. The book strikes a right balance between comprehensive theory, multiple choice questions, belonging to various levels of difficulty and Previous years' questions from PRMO and IOQM. A large collection of relevant and new problems is provided in the form of two exercise sets divided into three sections each as per the difficulty level - IOQM and PRMO level. Gradation of questions ensures that students attempt basic questions first and then the tougher problems as this will help them gain more skill and confidence in the subject.