39 + 15 years chapterwise solution - Mathematics book for those who are targeting JEE mains and advanced both. It contains the previous 39 years papers of JEE advanced/IIT JEE and 15 years papers of JEE Main/AIEEE. Since JEE main and advanced questions are present in chapterwise format, it gives a better idea of difference in level of questions in two exams. It also guides students about the depth of understanding a topic required for a certain chapter and topic. The number of questions reflects which chapter is important for mains and which is for advanced. A student using this book strategically can come up with flying colour in both the exams.