RD SHARMA MATHEMATICS BOOKS ARE EXCELLENT BOOKS TO ENHANCE HIGH ORDER THINKING SKILLS IN MATH SUBJECT. THERE ARE PLENTY OF QUESTIONS IN THIS BOOK . ALL QUESTIONS IN THIS BOOK IS ARE GIVEN FROM VERY BASIC TO VERY ADVANCE LEVEL . IT ALSO INCLUDES DETAILED THEORY ABOUT EACH AND EVERY CHAPTER IN VERY SIMPLEST WAY. I HAVE ALSO USED RD SHARMA BOOKS FOR 5 YEARS . IF A CHILD DOES EACH AND EVERY QUESTION OF THIS BOOK IT WILL CERTAINLY GET 100 PERCENT RESULTS IN MATH EXAM IN HIGHER SECONDARY SCHOOLS . I MAKES CONCEPT CRYSTALS CLEAR IN LEARNER MIND . I SUGGEST EVERY CHILD MUST BUY THIS AUTHOR BOOK IN ORDER TO GET GREAT MARKS IN THE EXAMINATION . IF A CHILD WANT TO EXCEL HIS CONCEPTS THEN HE/SHE SHOULD DO THIS BOOK THROUGHLY BY HEART . BUT THIS NEEDS MORE TIME TO COMPLETE IT it is most readable books in field of mathematics