| ID | Name | Tags | Submitters | % Correct | Average |
|---|---|---|---|---|---|
| fib | Fibonacci representations | ceoi 2018 d2 | 23 | 17% | 33 |
| tow | Task A Huge Tower | ceoi 2010 d2 | 21 | 95% | 95 |
| foo | Task Football League | ceoi 2004 d2 | 6 | 83% | 83 |
| hot | Task Hotel | ceoi 2011 d2 | 26 | 84% | 90 |
| pin | Task PIN | ceoi 2010 d2 | 22 | 63% | 73 |
| puz | Task Puzzle | ceoi 2004 d2 | 2 | 100% | 100 |
| tea | Task Teams | ceoi 2011 d2 | 25 | 68% | 77 |
| mp3 | Task The MP3 Player | ceoi 2010 d2 | 10 | 70% | 83 |
| tra | Task Traffic | ceoi 2011 d2 | 13 | 76% | 84 |
| two | Task Two Sawmills | ceoi 2004 d2 | 303 | 91% | 94 |
| toy | Toys | ceoi 2018 d2 | 66 | 84% | 94 |
| tri | Triangles | ceoi 2018 d2 | 35 | 74% | 81 |