Hey, I have some questions about how CIE calculate marks. Take example of chemistry,According to syllabus, 5 papers each weight 15%, 23%, 12%,38% and 12%. So when we calculate our total mark, we use what we got in each paper divided by the total mark of that paper then times its percentage and add all of them together. However, according to gt shows on xtremepapers.com, they only say get about 185 out of 260 for these five papers will lead an A*, they don't even mention the percentage. So how does CIE work actually? Do they just add marks together?