I answered several questions incorrect , can i get a very high score ?
Yes, Correct answers to Harder questions leads to large score as compared to easier questions. This means to Get large score more difficult questions has to be answered. The blue graph shows a student who got the first 8 questions right and the remainder wrong and the red graph show a student who got the first 8 questions wrong and the remainder right. The blue student scores much higher, despite answering fewer questions correctly.