for me having older exams is a cheat bro(especially when they made a slightly change each year)
test suppose to be thing that measure how much you understand the lesson you suppose to think and find out how to fix it not just remember and forget it the moment you get out of exam room
the main point of test is how much you comprehend the question and can you fix it
having olders exam is efficient but it just not help you improve in most important skill like comprehension skill
for me as long as you comprehend the question and remember about formula you can answer every question
@JWChibi why would i change your mind when you are right, change my mind