This book is designed in considering of national and international level maths olympiads.Problems are categoriged with INMO & IMO.There are three level of problems named as foundational, conceptual and logical which will help you to climb step by step from RMO to INMO.The tough problems with hints are given.At last of the book selected 5 years topicwise problems of INMO and IMO with hint are given.SOME OTHER SELECTED mixed problems of international level school and colleges are given which will help you to show brave of taking effort of solving problems at international level.