| Country | km² | Answer | mi² | % Correct |
|---|---|---|---|---|
| United States | 3,8 k | Mississippi | 2,3 k | 100%
|
| United States | 3,8 k | Missouri | 2,3 k | 100%
|
| France | 776 | Seine | 482 | 100%
|
| Brazil | 5,7 k | Amazon | 3,5 k | 96%
|
| D.R. Congo | 4,4 k | Congo | 2,7 k | 96%
|
| India | 2,5 k | Ganges | 1,6 k | 96%
|
| Ukraine | 2,2 k | Dnieper | 1,4 k | 92%
|
| France | 1,0 k | Loire | 625 | 92%
|
| France | 544 | Rhone | 338 | 92%
|
| India | 3,2 k | Indus | 2,0 k | 83%
|
| Poland | 1,0 k | Vistula | 651 | 83%
|
| Myanmar | 4,4 k | Mekong | 2,7 k | 71%
|
| Ukraine | 2,9 k | Danube | 1,8 k | 67%
|
| Ukraine | 1,4 k | Dniester | 846 | 67%
|
| India | 2,9 k | Brahmaputra | 1,8 k | 63%
|
| Brazil | 2,5 k | Paraná | 1,6 k | 63%
|
| United States | 3,2 k | Yukon | 2,0 k | 58%
|
| Myanmar | 2,3 k | Irrawaddy | 1,4 k | 54%
|
| Spain | 1,0 k | Tagus | 626 | 54%
|
| Spain | 910 | Ebro | 570 | 50%
|
| Poland | 840 | Oder | 520 | 42%
|
| Spain | 897 | Douro | 557 | 33%
|
| Myanmar | 3,3 k | Salween | 2,0 k | 25%
|
| D.R. Congo | 2,3 k | Ubangi | 1,4 k | 21%
|
| Brazil | 3,4 k | Purus | 2,1 k | 8%
|
| D.R. Congo | 2,2 k | Kasai | 1,3 k | 4%
|
| Poland | 808 | Warta | 502 | 4%
|