Question: At Roosevelt high school there are 600 students in the senior class. A fifth of the students are in the marching band. Of the students in the marching band, half of them play a brass instrument. Of the students that play a brass instrument, a fifth of them play the saxophone. Of the students that play the saxophone, a third of them play the alto saxophone. How many students play the alto saxophone?
Answer with step-by-step thinking: The number of students in the marching band is 600 / 5 = 120 students. The number of students that play a brass instrument is 120 / 2 = 60 students. The number of students that play the saxophone is 60 / 5 = 12 students. The number of students that play the alto saxophone is 12 / 3 = 4 students.
So the answer is 4.


Question: Gretchen draws caricatures in the park on the weekends. She charges $20.00 per drawing. If she sold 24 on Saturday and 16 on Sunday, how much money did she make?
Answer with step-by-step thinking: She drew 24 on Saturday and 16 on Sunday for a total of 24 + 16 = 40 drawings. She charges $20.00 per drawing and she drew 40 caricatures so she made $20 * 40 = $800.
So the answer is 800.


Question: It takes Matt 2 minutes per problem to do his math homework with a calculator and 5 minutes per problem without a calculator. If Matt's assignment has 20 problems, how much time will using a calculator save?
Answer with step-by-step thinking:
First find the time difference per problem: 5 minutes / problem - 2 minutes / problem = 3 minutes / problem. Then multiply that number by the number of problems to find the total time difference: 3 minutes / problem * 20 problems = 60 minutes.
So the answer is 60.