The table shows quiz marks out of  25  in each subject.   English Geography Mathematics Science Andrew    20    20 23 12   Brian 25 14 17 12 Colin 7 11 10 19 1. How many marks did Colin totally obtain in Mathematics and Science?   2. How many more marks does Andrew need for a perfect score in Mathematics?   3. In Geography, how many more marks did Andrew get than Brian?   4. Find the difference between Andrew's Science marks and Brian's English marks.   5. The Mathematics teacher by mistake gave Colin 2 times his actual marks. What are his actual marks?