ISEE Math Practice Test: Averages

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1. The average of 3 numbers is 18. What is two times the sum of the 3 numbers?

  • A. 108
  • B. 54
  • C. 36
  • D. 18

2. An art club of 4 boys and 5 girls makes craft projects. If the boys average 2 projects each and the girls average 3 projects each, what is the total number of projects produced by the club?

  • A. 14
  • B. 23
  • C. 26
  • D. 54

3. Catherine scores 84, 85, and 88 on her first three exams. What must she score on her fourth exam to raise her average to an 89 ?

  • A. 99
  • B. 97
  • C. 93
  • D. 91

4. If a class of 6 students has an average grade of 72 before a seventh student joins the class, what must the seventh student's grade be to raise the class average to 76 ?

  • A. 100
  • B. 92
  • C. 88
  • D. 80

5. Anna ate 2 doughnuts on Monday, Wednesday, and Friday and ate 4 doughnuts on Tuesday and Thursday. She did not eat any doughnuts on Saturday or Sunday. What is the average number of doughnuts that Anna ate each day of the week?

  • A. 2.0
  • B. 2.5
  • C. 2.8
  • D. 3.0

6. Merry drove 350 miles from New Orleans to Houston in 7 hours. She then drove 240 miles from Houston to Dallas in 4 hours. What was her approximate average rate of speed, in miles per hour (mph), for the entire trip?

  • A. 50.0 mph
  • B. 53.6 mph
  • C. 55.0 mph
  • D. 60.0 mph

7. The ticket price to a school's spring musical production is $6. The auditorium has a seating capacity of 300. After having spent $550 on stage production and $250 on advertising, how much profit did the school make, assuming the show was sold out?

  • A. $700
  • B. $800
  • C. $900
  • D. $1,000

8. Michael scored an average of 24 points over his first 5 basketball games. How many points must he score in his 6th game to average 25 points over all 6 games?

  • A. 24
  • B. 25
  • C. 30
  • D. 36

9. Dwan measured a total of 245 inches of rainfall in his hometown over one week. During the same week the previous year, his hometown had a total of 196 inches. How many more inches was the daily amount of rainfall for the week this year than the week last year?

  • A. 6
  • B. 7
  • C. 8
  • D. 9

10. Joe wants to find the mean number of pages in the books he has read this month. The books were 200, 220, and 260 pages long. He read the 200 page book twice, so it will be counted twice in the mean. If he reads one more book, what is the fewest number of pages it can have to make the mean no less than 230 ?

  • A. 268
  • B. 269
  • C. 270
  • D. 271