| length (km) | river | % Correct |
|---|---|---|
| 2860 | Danube | 100%
|
| 1236 | Rhine | 93%
|
| 1013 | Loire | 78%
|
| 813 | Rhone | 78%
|
| 776 | Seine | 73%
|
| 1091 | Elbe | 69%
|
| 910 | Ebro | 60%
|
| 1047 | Vistula | 56%
|
| 854 | Oder | 51%
|
| 1038 | Tagus | 40%
|
| 897 | Douro | 31%
|
| 925 | Meuse | 22%
|