The table shows quiz marks out of  25  in each subject.   English Geography Mathematics Science Andrew    16    18 23 5   Brian 14 14 17 5 Colin 15 14 21 20 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 3 times his actual marks. What are his actual marks?