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MathsAges 13-15

Calculating the mean

Sum a set of four data values and divide by four to calculate the arithmetic mean. Review suitability for your learners before teaching.

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Age band:Ages 10-12Ages 13-15

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Worksheet StudioPractice pack · Ages 13-15

Calculating the mean

Take your time. Show your thinking.

  1. 1. Find the mean of 20, 22, 28 and 30.

    20 · 22 · 28 · 30 · Calculating the mean

  2. 2. Find the mean of 17, 15, 21 and 19.

    17 · 15 · 21 · 19 · Calculating the mean

  3. 3. Find the mean of 16, 13, 21 and 18.

    16 · 13 · 21 · 18 · Calculating the mean

  4. 4. Find the mean of 24, 26, 32 and 34.

    24 · 26 · 32 · 34 · Calculating the mean

  5. 5. Find the mean of 22, 22, 28 and 28.

    22 · 22 · 28 · 28 · Calculating the mean

  6. 6. Find the mean of 23, 23, 29 and 29.

    23 · 23 · 29 · 29 · Calculating the mean

  7. 7. Find the mean of 20, 19, 23 and 22.

    20 · 19 · 23 · 22 · Calculating the mean

  8. 8. Find the mean of 8, 9, 17 and 18.

    8 · 9 · 17 · 18 · Calculating the mean

  9. 9. Find the mean of 11, 9, 17 and 15.

    11 · 9 · 17 · 15 · Calculating the mean

  10. 10. Find the mean of 24, 24, 28 and 28.

    24 · 24 · 28 · 28 · Calculating the mean

  11. 11. Find the mean of 21, 21, 23 and 23.

    21 · 21 · 23 · 23 · Calculating the mean

  12. 12. Find the mean of 17, 19, 25 and 27.

    17 · 19 · 25 · 27 · Calculating the mean
12 questions · Seed 47 · Age guidance, not curriculum certification
View the answer key
Worksheet StudioAnswer key · Ages 13-15

Calculating the mean

Answers and reasoning. Review before teaching.

  1. 1. Find the mean of 20, 22, 28 and 30.

    25

    Sum = 20 + 22 + 28 + 30 = 100. Divide by 4: 100 ÷ 4 = 25.

  2. 2. Find the mean of 17, 15, 21 and 19.

    18

    Sum = 17 + 15 + 21 + 19 = 72. Divide by 4: 72 ÷ 4 = 18.

  3. 3. Find the mean of 16, 13, 21 and 18.

    17

    Sum = 16 + 13 + 21 + 18 = 68. Divide by 4: 68 ÷ 4 = 17.

  4. 4. Find the mean of 24, 26, 32 and 34.

    29

    Sum = 24 + 26 + 32 + 34 = 116. Divide by 4: 116 ÷ 4 = 29.

  5. 5. Find the mean of 22, 22, 28 and 28.

    25

    Sum = 22 + 22 + 28 + 28 = 100. Divide by 4: 100 ÷ 4 = 25.

  6. 6. Find the mean of 23, 23, 29 and 29.

    26

    Sum = 23 + 23 + 29 + 29 = 104. Divide by 4: 104 ÷ 4 = 26.

  7. 7. Find the mean of 20, 19, 23 and 22.

    21

    Sum = 20 + 19 + 23 + 22 = 84. Divide by 4: 84 ÷ 4 = 21.

  8. 8. Find the mean of 8, 9, 17 and 18.

    13

    Sum = 8 + 9 + 17 + 18 = 52. Divide by 4: 52 ÷ 4 = 13.

  9. 9. Find the mean of 11, 9, 17 and 15.

    13

    Sum = 11 + 9 + 17 + 15 = 52. Divide by 4: 52 ÷ 4 = 13.

  10. 10. Find the mean of 24, 24, 28 and 28.

    26

    Sum = 24 + 24 + 28 + 28 = 104. Divide by 4: 104 ÷ 4 = 26.

  11. 11. Find the mean of 21, 21, 23 and 23.

    22

    Sum = 21 + 21 + 23 + 23 = 88. Divide by 4: 88 ÷ 4 = 22.

  12. 12. Find the mean of 17, 19, 25 and 27.

    22

    Sum = 17 + 19 + 25 + 27 = 88. Divide by 4: 88 ÷ 4 = 22.

12 questions · Seed 47 · Age guidance, not curriculum certification
Worksheet StudioPractice pack · Ages 13-15

Calculating the mean

Take your time. Show your thinking.

  1. 1. Find the mean of 20, 22, 28 and 30.

    20 · 22 · 28 · 30 · Calculating the mean

  2. 2. Find the mean of 17, 15, 21 and 19.

    17 · 15 · 21 · 19 · Calculating the mean

  3. 3. Find the mean of 16, 13, 21 and 18.

    16 · 13 · 21 · 18 · Calculating the mean

  4. 4. Find the mean of 24, 26, 32 and 34.

    24 · 26 · 32 · 34 · Calculating the mean

  5. 5. Find the mean of 22, 22, 28 and 28.

    22 · 22 · 28 · 28 · Calculating the mean

  6. 6. Find the mean of 23, 23, 29 and 29.

    23 · 23 · 29 · 29 · Calculating the mean

  7. 7. Find the mean of 20, 19, 23 and 22.

    20 · 19 · 23 · 22 · Calculating the mean

  8. 8. Find the mean of 8, 9, 17 and 18.

    8 · 9 · 17 · 18 · Calculating the mean

  9. 9. Find the mean of 11, 9, 17 and 15.

    11 · 9 · 17 · 15 · Calculating the mean

  10. 10. Find the mean of 24, 24, 28 and 28.

    24 · 24 · 28 · 28 · Calculating the mean

  11. 11. Find the mean of 21, 21, 23 and 23.

    21 · 21 · 23 · 23 · Calculating the mean

  12. 12. Find the mean of 17, 19, 25 and 27.

    17 · 19 · 25 · 27 · Calculating the mean
12 questions · Seed 47 · Age guidance, not curriculum certification
Worksheet StudioAnswer key · Ages 13-15

Calculating the mean

Answers and reasoning. Review before teaching.

  1. 1. Find the mean of 20, 22, 28 and 30.

    25

    Sum = 20 + 22 + 28 + 30 = 100. Divide by 4: 100 ÷ 4 = 25.

  2. 2. Find the mean of 17, 15, 21 and 19.

    18

    Sum = 17 + 15 + 21 + 19 = 72. Divide by 4: 72 ÷ 4 = 18.

  3. 3. Find the mean of 16, 13, 21 and 18.

    17

    Sum = 16 + 13 + 21 + 18 = 68. Divide by 4: 68 ÷ 4 = 17.

  4. 4. Find the mean of 24, 26, 32 and 34.

    29

    Sum = 24 + 26 + 32 + 34 = 116. Divide by 4: 116 ÷ 4 = 29.

  5. 5. Find the mean of 22, 22, 28 and 28.

    25

    Sum = 22 + 22 + 28 + 28 = 100. Divide by 4: 100 ÷ 4 = 25.

  6. 6. Find the mean of 23, 23, 29 and 29.

    26

    Sum = 23 + 23 + 29 + 29 = 104. Divide by 4: 104 ÷ 4 = 26.

  7. 7. Find the mean of 20, 19, 23 and 22.

    21

    Sum = 20 + 19 + 23 + 22 = 84. Divide by 4: 84 ÷ 4 = 21.

  8. 8. Find the mean of 8, 9, 17 and 18.

    13

    Sum = 8 + 9 + 17 + 18 = 52. Divide by 4: 52 ÷ 4 = 13.

  9. 9. Find the mean of 11, 9, 17 and 15.

    13

    Sum = 11 + 9 + 17 + 15 = 52. Divide by 4: 52 ÷ 4 = 13.

  10. 10. Find the mean of 24, 24, 28 and 28.

    26

    Sum = 24 + 24 + 28 + 28 = 104. Divide by 4: 104 ÷ 4 = 26.

  11. 11. Find the mean of 21, 21, 23 and 23.

    22

    Sum = 21 + 21 + 23 + 23 = 88. Divide by 4: 88 ÷ 4 = 22.

  12. 12. Find the mean of 17, 19, 25 and 27.

    22

    Sum = 17 + 19 + 25 + 27 = 88. Divide by 4: 88 ÷ 4 = 22.

12 questions · Seed 47 · Age guidance, not curriculum certification