Sheet # 61 Critical Thinking
Name: _____________________ Date_____________
Show and explain your work. Draw pictures or make tables to explain your answer.
Derek was in Math Club, and as a result his regular math exam scores were improving each week by 5 points from the previous exam. He took 5 exams and his average score was 85. What was his score on each of the five tests?
Answer for sheet # 61
n is the score in the first week
n +5 is the score in the 2nd week
n + 10 in the 3rd week
n + 15 in the 4th week
n + 20 in the 5th week
total score: 5n + 50
Average score = (5n + 50)/5 = 85
n +10 = 85
n = 75 (score in the first week)
80 in the 2nd week, 85 in the 3rd week, 90 in the 4th week, 95 in the 5th week.