| No | Description | Difficulty | Syllabus | Level | |
|---|---|---|---|---|---|
| 1 | A+Bx+Cy+Dx^2+Exy+Fy^2; 3NI | Intermediate | A-level | C1 | Related material |
| 2 | demand functions and linear TC given, maximise profit; 3NI | Intermediate | A-level | C1 | Related material |
| 3 | P1, P2 and quadratic TC given, maximise profit; 3NI | Intermediate | A-level | C1 | Related material |