Here are seven cards. Each card has a number on it.
| 12 | 5 | 10 | 18 | 12 | 11 | 9 |
| ---- | --- | ---- | ---- | ---- | ---- | --- |
Verify that the range of the numbers on the cards is 13.
Verify that the median of the numbers on the cards is 11.
Verify that the mean of the numbers on the cards is 11.
201 exam-style questions on OCR GCSE Maths Averages. Each one has a worked solution and a mark scheme showing where the marks go.