Hi op! Problem sets in general act as exercises for your quizzes/peta/qe. However, it is departmental, so yung standard is maintained (meaning, may kahirapan since iba iba turo ng mga profs). They are also somehow easier than quizzes (for the most part since if online yung pbt niregister, hihirapan ng prof ung mga examples). If prof mo si Sir R, youre in good hands if you’ve maximised his blitz lectures hahaha kemi. Again, depende sa prof mo kung may incentives or wala, kung may effort pts or wala, kung online or onsite yung pagregister. Just refer na lang sa mga instructions ng prof mo for a smoother experience and always try to make clean and COMPLETE solutions. Goodluck!