Last-minute studies almost invariably result in very low grades or even failure. Making a last-minute study decision is a terrible one. Students must study and learn in advance with the ICSE Class 9 Mathematics Revision Notes Chapter 3 if they want to do it effectively. Students who study the night before an exam may experience increased tension and insomnia, which increases the likelihood that they will doze off or forget what they learned. It should be of paramount importance to begin studying months before the exam so that the student may just read once before walking into the exam room and knowing exactly what to write.