Why the 2009 AMC 10A Is Still Worth Practicing Today
If you're digging through old math competition archives, you've probably landed on the 2009 AMC 10A and wondered if it's still relevant after all these years. It's a valid question—math competitions evolve, and the problems from fifteen years ago can sometimes feel a bit "dated" compared to the high-octane geometry or complex counting problems we see in the 2020s. But there is something really special about the 2009 set. It's often cited as one of those "goldilocks" exams: not so easy that it's a boring calculation slog, but not so punishingly difficult that you want to throw your pencil across the room. ...