@SternBusiness: you are correct- you have to be at the top of your class to get into these schools. You are also correct that you need very strong numbers. But you are simply not correct about 10+APs being necessary to get into these schools. I know, first hand, of many, many students who are currently enrolled at HYPSM & others who I know do not have more than 5-6 APs.
The point is that good stats are necessary but not sufficient, and simply having taken more APs is not going to impress AdComms, many of whom have made it abundantly clear that they do not like the arms-race approach to applying. For example:
Bill Fitzsimmons, Dean of Admissions at Harvard:
“There are people who arrive at college out of gas,” says William Fitzsimmons, dean of admissions at Harvard College in Cambridge, Massachusetts. “It’s crazy for students to think in lockstep they must take four or five or six advanced-placement courses because colleges demand it.”
Or:
Dean of Admissions at Stanford:
One thing we are trying to do is dispel the myth that a curriculum loaded to the brim with Advanced Placement courses—with no regard to a student’s happiness or personal interests—is a prerequisite for admission to Stanford. Such a course load is not required, nor is it always healthy.
Whenever we talk to students and parents, we encourage them to work with you [guidance counselors] to develop an appropriate course load. Of course we want students to challenge themselves, but we don’t want them to hurt themselves physically or mentally along the way. We try to explain to families that the students who will thrive at Stanford are those who are genuinely excited about learning, not necessarily those who take every single AP or Honors or Accelerated class. We tell students we expect them to take a reasonably challenging load, selecting from among the most demanding courses available to them. And we make it clear that we want students to work with you to exercise good judgment in course selection.
Or:
Matt McGann, MIT
I had classmates who attended high schools that offered dozens of these courses, and, yes, some of them even took dozens of APs. But it is not necessary that you take all of these courses, or as many as possible…There is no minimum or recommended number of AP courses. AP scores are not part of an admission formula…What we are saying is that, despite what you may have heard, college admissions isn’t a game of whoever has the most APs, wins.
Telling the OP- a 9th grader!- that a sure way to impress AdComms at top schools is by taking 16 APs is wrong and misleading.