QUESTIONS ON THE RADAR

for the student/candidates who are able to score very high scores on their IGCSE, no offense but specifically 99-100(maybe just 100), did you use to get those marks before like you kept getting 100% on every test and finally at the end you ended u with a 100, actually for all the percentage between 90-100, did you start getting like those score way before and then when you did the IGCSE it was just another ''normal'' exam for you OR it was different idk. I am just asking coz I always do the best in my class I have been able to score full marks, my lowest one ever was 87%(ik bad!!!) and my average I would say is about 95% but my obj is to score 100, idk what to do aaaaahhh BTW THIS IS CHEMISTRY 0620 i am talking about, Something else do you have to score full marks on each paper to get the 100% at the end???