Here is a list of six numbers. One of the numbers is hidden.
| 18 | 22 | 19 | 21 | 25 | ? |
| ---- | --- | --- | --- | --- | --- |
The mean of the numbers is 20.
Find the value of the hidden number.
Practise AQA GCSE Maths Averages with exam-style questions for Foundation and Higher tier. 48 questions, matched to the AQA GCSE Maths (8300) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.