| Length in km | River | % Correct |
|---|---|---|
| 1,048 | Rhine | 98%
|
| 2,811 | Danube | 93%
|
| 1,094 | Elbe | 87%
|
| 524 | Main | 73%
|
| 866 | Oder | 70%
|
| 382 | Spree | 55%
|
| 517 | Inn | 51%
|
| 452 | Weser | 51%
|
| 219 | Ruhr | 47%
|
| 367 | Neckar | 42%
|
| 227 | Saar | 42%
|
| 545 | Moselle | 41%
|
| 286 | Isar | 39%
|
| 371 | Ems | 37%
|
| 325 | Havel | 33%
|
| 413 | Saale | 30%
|
| 218 | Fulda | 26%
|
| 264 | Lech | 23%
|
| 292 | Werra | 21%
|
| 246 | Lahn | 20%
|
| 220 | Lippe | 19%
|
| 191 | Regen | 19%
|
| 281 | Leine | 17%
|
| 117 | Wupper | 17%
|
| 260 | Aller | 16%
|
| 124 | Trave | 13%
|
| 49 | Dreisam | 10%
|