| ID | Name | Tags | Submitters | % Correct | Average |
|---|---|---|---|---|---|
| kop | Zadanie Kopalnia | ontak 2013 | 2 | 0% | 22 |
| kop | Task Goldmine | oi 8 e3 d2 | 267 | 79% | 89 |
| kor | Task Beads | oi 17 e1 | 388 | 76% | 87 |
| kor | Zadanie Korekcja błędów | pa 2002-2 r4 | 4 | 100% | 100 |
| kor | Zadanie Korniki [B] | pa 2012 r6 b | 37 | 18% | 34 |
| kos | Zadanie Kości | oi 12 e2 d2 | 100 | 41% | 65 |
| kos | Task Dice | ontak 2007 | 8 | 62% | 65 |
| kos | Zadanie Kosmiczny pościg | oig 4 e3 | 281 | 57% | 74 |
| kos | Zadanie Kostka | ontak 2011 | 1 | 0% | 0 |
| kos | Task Dice [A] | pa 2009 r2 a | 25 | 60% | 64 |
| kst | Zadanie Kostki domina | proserwy 2010 | 278 | 51% | 76 |
| kos | Zadanie Koszykarz | proserwy 2010 | 4091 | 82% | 90 |
| kos | Task Basketball player | math Very easy | 177 | 0% | 0 |
| kot | Task A Cat on a Keyboard | pa 2008 trial | 169 | 78% | 84 |
| koz | Task The Goat [A] | pa 2010 r5 a | 6 | 83% | 83 |
| kra | Zadanie Krany | ilocamp 2011 | 286 | 67% | 77 |
| kra | Zadanie Kratki | proserwy 2010 | 292 | 61% | 75 |
| kra | Task The Disks | oi 13 e1 | 1618 | 77% | 84 |
| wyd | Task Creative Accounting | ontak 2010 | 68 | 75% | 80 |
| kredens | Zadanie Kredens | 0 |