| ID | Name | Tags | Submitters | % Correct | Average |
|---|---|---|---|---|---|
| car | Car Park | ceoi 2018 d0 | 43 | 69% | 76 |
| clo | Cloud computing | ceoi 2018 d1 | 87 | 73% | 85 |
| dis | Distance | ceoi 2018 d0 | 9 | 88% | 89 |
| fib | Fibonacci representations | ceoi 2018 d2 | 14 | 21% | 34 |
| glo | Global warming | ceoi 2018 d1 | 85 | 90% | 93 |
| lot | Lottery | ceoi 2018 d1 | 48 | 70% | 83 |
| tow | Task A Huge Tower | ceoi 2010 d2 | 21 | 95% | 95 |
| ari | Task An Arithmetic Rectangle | ceoi 2010 d1 | 4 | 25% | 27 |
| bal | Task Balloons | ceoi 2011 d1 | 45 | 77% | 85 |
| clo | Task Clouds | ceoi 2004 d1 | 7 | 57% | 58 |
| foo | Task Football League | ceoi 2004 d2 | 6 | 83% | 83 |
| hot | Task Hotel | ceoi 2011 d2 | 26 | 84% | 90 |
| jou | Task Journey | ceoi 2004 d0 | 14 | 85% | 85 |
| mat | Task Matching | ceoi 2011 d1 | 99 | 61% | 75 |
| pin | Task PIN | ceoi 2010 d2 | 21 | 66% | 76 |
| puz | Task Puzzle | ceoi 2004 d2 | 2 | 100% | 100 |
| sim | Task Similarity | ceoi 2011 d0 | 26 | 69% | 94 |
| swe | Task Sweets | ceoi 2004 d1 | 25 | 52% | 75 |
| tea | Task Teams | ceoi 2011 d2 | 24 | 70% | 76 |
| all | Task The Alliances | ceoi 2010 d1 | 4 | 75% | 84 |