| No | Description | Difficulty | Syllabus | Level | |
|---|---|---|---|---|---|
| 1 | inferences for summations +ve xi, yi for all i to Sx, Sy, Sxx etc; 4TFUSP | Hard | A-level | C1 | Related material |
| 2 | inferences for summations +ve xi, yi for some i to Sx, Sy, Sxx etc; 4TFUSP | Hard | A-level | C1 | Related material |
| 3 | MathML SumX n-sub; NI | Easy | GCSE | Intermediate | Related material |
| 4 | MathML SumX; NI | Easy | GCSE | Intermediate | Related material |
| 5 | MathML SumXX n-sub; NI | Intermediate | A-level | S1 | Related material |
| 6 | MathML SumXX; NI | Intermediate | A-level | S1 | Related material |
| 7 | MathML SumXY n-sub; NI | Hard | A-level | S1 | Related material |
| 8 | MathML SumXY; NI | Hard | A-level | S1 | Related material |
| 9 | MathML SumY n-sub; NI | Easy | GCSE | Intermediate | Related material |
| 10 | MathML SumY; NI | Easy | GCSE | Intermediate | Related material |
| 11 | Name SumX; NI | Easy | GCSE | Intermediate | Related material |
| 12 | Name SumXX; NI | Intermediate | A-level | S1 | Related material |
| 13 | Name SumXY; NI | Hard | A-level | S1 | Related material |
| 14 | Name SumY; NI | Easy | GCSE | Intermediate | Related material |