Honestly, here in the midwest the test of choice is the ACT. I am not familiar with the current difficulty of the SAT which is what I took, and while not 50 years ago it has been a very long time. That being said, the ACT is actually a pretty difficult test. The math section has some calculus questions on it, is mostly all word problems and requires a completion time of approximately one minute/problem to finish the section. The English and Science sections are no joke either.