asianasen good questions! (ill add u to the thing) but i think the hardest for me was qualitative (surprisingly) because personaly i struggle with decoding random letters and synonyms and the easiest was writing (surprisingly) i think the practice paid off, even tho it wasnt much easier.. i expected writing to be the worst and maths to be the easiest. maths was second easiest, just cause it was time consuming
i studied for around an hour daily in the last month cuz i didnt do anything before, but if u start early, even tewnty minutes should be fine so long as ur studiying the right thing and efficiently
i recommend the angry explainer for study techniques on youtube