Micro economy covers a great and important place in economics because it builds foundation for all branches of economics. Also it is observed that the weight of mathematics in economy is expanding day by day. Academical searches, journals, books include complex mathematical descriptions of economic theories so that nowadays it is not possible to think economy and mathematic apart from each other. This book is not suitable and useful for scholars who is learning economics but useful for searchers who is interesting in mathematical applications of micro economics. In other words this is not a micro economy lesson book, but a testbook for micro economy problems. For that reason readers of this book must know micro economy and mathematic very deeply. Unless readers don’t know economy and mathematic, it is not possible to understand problems and solving methods of them. As you can understand this book is not a lesson book but a testbook or a guide for searchers who are looking for different questions about micro economics. First chapter targets to remind mathematical substructure that is needed to solve questions in following chapters. Second chapter includes questions about cardinal and ordinal utility functions, consumer equilibrium. Third chapter deals with the problems about demand and supply function, relationship between them and market equilibrium. Fourth chapter studies problems about producer equilibrium, cost functions and profit maximization. My studies to prepare and search for this book lasted more than a year and during this process my mother understood my untidiness in my room and table. I am grateful to her, my teachers who make me interesting in mathematical applications of micro economy and my friends who support me. I would appreciate contributions of PhD. Korkmaz Uluçay in this book. My friends lecturer Özhan Görçün, lecturer Yasin Çakırel and lecturer Öznur Aydıner helps me improving and correcting this book. Lecturer Simay Bodur prepares covering of the book. Ass. Prof.Dr. Nurdan Çolakoğlu does not stint her helps and advisements from me. I would appreciate all the efforts of the people whose names are written in thanks box. Of course I am responsible for all faults in this book.