A not uncommon occurrence for students is that they only have a few days left before an exam for a course they are taking and may still have some topics that they need to revise. (This doesn't necessarily mean lack of commitment to the course, but there may have been other, harder subjects, or personal issues that arose.)
My question is if there a trick to choose the optimum number of past year question papers to optimize my score on the exams? Is there a general suggestion regarding which past year papers should I solve and which I should skip?
This question is coming from the perspective of the student, but I could envisage this also being a useful question for tutors or instructors.