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About Data Collection & Display — Class 6 IB

Collect data through surveys and experiments, and display using charts and graphs. This topic is part of the IB Class 6 mathematics syllabus (chapter: Unit 8). On this page you can practice 60 questions across three difficulty levels — 20 easy, 20 medium, and 20 hard — each with a visual step-by-step solution, plus a timed 35-question mastery test with a live leaderboard. Worked examples and sample questions from the topic are below.

Data Collection & Display — solved examples for Class 6 IB

Example 1easy

A bar chart shows the following scores: Math 8, Science 6, English 7, Art 9. Which subject has the highest score?
  1. A)Math
  2. B)Science
  3. C)English
  4. D)Art

Step-by-step solution

  1. Art has the highest score of 9.

Answer: Art

Example 2medium

The mean of 5 numbers is 12. What is the total sum of the numbers?
  1. A)48
  2. B)55
  3. C)60
  4. D)72

Step-by-step solution

  1. Sum:
    12×5=6012 \times 5 = 60

Answer: 60

Example 3hard

The mean of 10 numbers is 24. When one number is removed, the mean of the remaining 9 is 25. What number was removed?
  1. A)14
  2. B)15
  3. C)16
  4. D)17

Step-by-step solution

  1. Removed:
    240−225=15240 - 225 = 15

Answer: 15

Practice questions on Data Collection & Display

  1. Q1.easy

    What is the range of this data set: 3, 7, 2, 9, 5?
    1. A)5
    2. B)6
    3. C)7
    4. D)9
    Show answer

    Answer: 7

    Hint: Range = highest value − lowest value.

  2. Q2.easy

    Find the mean of: 4, 6, 8, 10, 12.
    1. A)6
    2. B)7
    3. C)8
    4. D)9
    Show answer

    Answer: 8

    Hint: Mean = sum ÷ number of values.

  3. Q3.easy

    In a pictogram, each symbol represents 5 students. If a row has 3 symbols, how many students does it represent?
    1. A)3
    2. B)8
    3. C)10
    4. D)15
    Show answer

    Answer: 15

    Hint: Multiply the number of symbols by the value of each.

  4. Q4.medium

    Find the median of: 4, 8, 1, 5, 9, 3.
    1. A)4
    2. B)4.5
    3. C)5
    4. D)5.5
    Show answer

    Answer: 4.5

    Hint: With an even number of values, the median is the mean of the two middle values.

  5. Q5.medium

    A pie chart shows 25% like chocolate. If 80 people were surveyed, how many like chocolate?
    1. A)15
    2. B)20
    3. C)25
    4. D)30
    Show answer

    Answer: 20

    Hint: 25% of 80.

  6. Q6.medium

    The scores of 6 tests are: 72, 85, 68, 90, 78, 83. Find the mean score.
    1. A)76
    2. B)78
    3. C)79.3
    4. D)80
    Show answer

    Answer: 79.3

    Hint: Sum all scores and divide by 6.

  7. Q7.hard

    A pie chart has 4 sectors. Three sectors have angles 80°, 120°, and 100°. What angle does the fourth sector have?
    1. A)50°
    2. B)60°
    3. C)70°
    4. D)80°
    Show answer

    Answer: 60°

    Hint: Total = 360°.

  8. Q8.hard

    The mean weight of 5 boys is 42 kg and the mean weight of 3 girls is 38 kg. What is the mean weight of all 8 children?
    1. A)40 kg
    2. B)40.25 kg
    3. C)40.5 kg
    4. D)41 kg
    Show answer

    Answer: 40.5 kg

    Hint: Total boys = 210, total girls = 114. Combined mean = 324/8.

  9. Q9.hard

    A data set has values: 5, 8, 12, x, 20. If the median is 12, which of these could be the value of x?
    1. A)6
    2. B)10
    3. C)14
    4. D)All of these
    Show answer

    Answer: All of these

    Hint: For 12 to be the median (3rd value), x can be anywhere ≤ 12 or ≥ 12.

These are 9 of the 60 questions available for Data Collection & Display. Start practicing above to unlock visual solutions, AI coaching, and the topic leaderboard — completely free.