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Primary 6 · Mathematics · Average

Average questions for Primary 6 Maths

10 questions to work through online. Answer and you get the working straight away, then a score at the end. No sign-up, and you can retake it as often as you like.

  • Finding an average
  • Working backwards
  • Missing score
  • Combined average
  • Average after a change
  • Average in context
  • Finding a missing number
  • Average of even count
  • Average after a new value
0 of 10 answered
Question 1 of 10Finding an average
Find the average of 64, 81, 73, 90.
Question 2 of 10Working backwards
The average of 7 numbers is 56. What is their total?
Question 3 of 10Missing score
After 4 tests Devi's average was 72. What must she score in the fifth test for her average to become 76?
Question 4 of 10Combined average
12 pupils have an average height of 64 cm. Another 8 pupils have an average height of 72 cm. What is the average height of all 20 pupils?
Question 5 of 10Average after a change
The average of 5 numbers is 48. When one of them, 60, is removed, what is the average of the remaining numbers?
Question 6 of 10Average in context
A shop sold 18, 24, 21, 27, 20 books over five days. What was the average number sold per day?
Question 7 of 10Finding a missing number
The average of 15, 18, 21, 24 and one more number is 20. What is the missing number?
Question 8 of 10Combined average
Wei Ming scored an average of 40 in 3 games, then an average of 56 in the next 5 games. What is his average over all 8 games?
Question 9 of 10Average of even count
Find the average of 17, 23, 29 and 19.
Question 10 of 10Average after a new value
The average of 6 numbers is 80. A seventh number, 45, is included. What is the new average?
Answers and explanations for all 10 questions

Every answer with the reasoning behind it. Worth reading after you have tried the set — or on its own, if you are a parent marking it.

  1. Find the average of 64, 81, 73, 90.

    Answer: 77

    64 + 81 + 73 + 90 = 308, and 308 ÷ 4 = 77.

  2. The average of 7 numbers is 56. What is their total?

    Answer: 392

    Total = average × how many = 56 × 7 = 392.

  3. After 4 tests Devi's average was 72. What must she score in the fifth test for her average to become 76?

    Answer: 92

    She needs 5 × 76 = 380 and has 4 × 72 = 288, so the fifth test needs 92.

  4. 12 pupils have an average height of 64 cm. Another 8 pupils have an average height of 72 cm. What is the average height of all 20 pupils?

    Answer: 67.2 cm

    Total height is 12 × 64 + 8 × 72 = 1344 cm, and 1344 ÷ 20 = 67.2 cm.

  5. The average of 5 numbers is 48. When one of them, 60, is removed, what is the average of the remaining numbers?

    Answer: 45

    The five numbers total 240. Without 60 they total 180, and 180 ÷ 4 = 45.

  6. A shop sold 18, 24, 21, 27, 20 books over five days. What was the average number sold per day?

    Answer: 22

    18 + 24 + 21 + 27 + 20 = 110, and 110 ÷ 5 = 22.

  7. The average of 15, 18, 21, 24 and one more number is 20. What is the missing number?

    Answer: 22

    Five numbers averaging 20 total 100. The four given add to 78, so the missing number is 22.

  8. Wei Ming scored an average of 40 in 3 games, then an average of 56 in the next 5 games. What is his average over all 8 games?

    Answer: 50

    Total points 3 × 40 + 5 × 56 = 400, and 400 ÷ 8 = 50.

  9. Find the average of 17, 23, 29 and 19.

    Answer: 22

    17 + 23 + 29 + 19 = 88, and 88 ÷ 4 = 22.

  10. The average of 6 numbers is 80. A seventh number, 45, is included. What is the new average?

    Answer: 75

    The six numbers total 480. With 45 they total 525, and that ÷ 7 = 75.