Free practice on Data Management for Class 5, following the Cameroon primary school curriculum (English subsystem). Every answer is explained, so a parent who is not sure of the answer can still help.
Bar chart: bars for each category. Pie chart: slices of a circle showing shares. Histogram: bars for grouped numeric data. Each is useful in different cases.
| Chart | Best for |
|---|---|
| Bar chart | Compare separate categories |
| Pie chart | Show parts of a whole |
| Histogram | Show ranges of values |
| Line chart | Show change over time |
Ascending: smallest to biggest. Descending: biggest to smallest. Practise with these: 45, 12, 78, 33, 56. Ascending → 12, 33, 45, 56, 78.
| Ascending ↑ | Descending ↓ |
|---|---|
| 12 | 78 |
| 33 | 56 |
| 45 | 45 |
| 56 | 33 |
| 78 | 12 |
A frequency table shows how often each value appears. Useful for organising raw data before drawing charts. Example: scores 7, 8, 7, 9, 7, 8, 10.
| Score | Tally | Frequency |
|---|---|---|
| 7 | III | 3 |
| 8 | II | 2 |
| 9 | I | 1 |
| 10 | I | 1 |
Find the mean of 4, 6 and 8.
Write your answer, then check below.
Answer: 6
(4 + 6 + 8) ÷ 3 = 18 ÷ 3 = 6.
Find the mean of 10, 20, 30 and 40.
Write your answer, then check below.
Answer: 25
(10+20+30+40) ÷ 4 = 100 ÷ 4 = 25.
Arrange in ascending order: 340, 304, 430
Answer: A. 304, 340, 430
Which chart uses slices of a circle to show data?
Answer: B. pie chart
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