The table shows quiz marks out of 25 in each subject.   English Geography Mathematics Science Adam 23 22 23 12 Bob 23 11 23 5 Charles 15 9 24 17 1. What is the difference between Charles' marks in English and Science?   2. How many more marks does Adam need for a perfect score in Mathematics?   3. In Geography, how many more marks did Adam get than Bob?   4. Find the difference between Adam's Science marks and Bob's English marks.   5. The Mathematics teacher gave Charles 3 extra marks by mistake. What are his real marks?