10 paragraphs is best. An intro and conclusion included with 8 paragraphs answering the question. Your score for every paragraph is added up and put out of 60 so if you do 10 good paragraphs your'e essentially guaranteed to get 60. Link every paragraph to the question that is asked as well. Your overall mark is out of 40 and if you answer the question asked then you will score well out of 40 as well.