1. Let's start by understanding your exam is worth 120 marks. 2. To study effectively, you should break down the topics and allocate time based on their weight in the exam. 3. For example, if a topic is worth 30 marks, you should spend about $\frac{30}{120} = 0.25$ or 25% of your study time on it. 4. Use formulas like total marks $= \sum$ of marks per topic to plan your study schedule. 5. Prioritize topics you find difficult and practice problems to improve. 6. Remember to review and test yourself regularly to track progress. 7. Good luck with your exam preparation!