Harry conducts a poll to determine his classmates’ favorite musical instruments. On the day Harry conducted the poll, of the class was away on a field trip. Of the students who were present, chose the guitar, chose the drums, chose the piano, chose the saxophone, and chose the flute. No other instruments were chosen and all present students including Harry participated in the poll. If 6 students choose the piano, how many students are in Harry’s class?

The ACT Mathematics Test contains 60 questions to be answered in 60 minutes.  The hardest ACT math questions (the last 10 to 15 questions) fall into two types: advanced concepts and complex questions. Advanced concepts questions cover what you learn in precalculus and trigonometry. FYI: Students that get into Harvard College have an ACT score of 34–36.