How difficult are the validation exams? Is the format in AP exam (multiple-choice? free response?) format/style/difficulty? I have solid AP exam scores in some classes I took when I was an underclassmen and I think I need to brush up on them if I want to do well on these validation tests during Plebe Summer. Also, approximately how many Plebes validate out of Calc III? What is that validation exam like (application-based? or straight up solving problems)? Any advice or information would be much appreciated!