| Tributaries | River | % Correct |
|---|---|---|
| Sava, Tisza, Prut, Siret, Drava, Olt, Inn | Danube | 93%
|
| Main, Moselle, Neckar, Erft, Thur, Aar, Moder, Ruhr, Sieg, Lippe | Rhine | 93%
|
| Durance, Saône, Arve, Drôme, Ouvèze, Eyrieux, Valserine | Rhône | 91%
|
| Oka, Kama, Vetluga, Sura, Uzola, Kazanka, Samara | Volga | 86%
|
| Allier, Vienne, Cher, Indre, Maine, Erdre, Arroux | Loire | 84%
|
| Panaro, Secchia, Mincio, Oglio, Enza, Parma, Adda, Taro, Tanaro, Dora Baltea, Ticino, Oglio | Po | 81%
|
| Churn, Wey, Mole, Kennet, Cherwell, Lea, Colne | Thames | 81%
|
| Marne, Oise, Aube, Risle, Eure, Loing, Yonne | Seine | 77%
|
| Narew, San, Wieprz, Pilica, Dunajec, Brda, Drwęca, Wda | Vistula | 74%
|
| Donets, Khopyor, Krasivaya Mecha, Medveditsa, Voronezh, Bityug, Ilovlya, Manych | Don | 72%
|
| Úpa, Metuje, Jizera, Vltava/Moldau, Saale, Schwarze Elster, Havel, Elde | Elbe | 67%
|
| Stour, Wye, Teme, Avon, Usk, Vyrnwy, Rad Brook | Severn | 65%
|
| Jarama, Algodor, Guadarrama, Alberche, Tiétar, Almonte, Alagón, Zêzere | Tagus | 60%
|
| Lybid, Drut, Irpin', Teteriv, Bazavluk, Pripyat, Sozh | Dnieper | 58%
|
| Warta, Bóbr, Nysa Łużycka (Lusatian Neisse), Nysa Kłodzka (Eastern Neisse), Opava, Olše | Oder | 51%
|
| Boyle, Inny, Suck, Mulkear, Brosna, Owenmore, Maigue | Shannon | 44%
|
| Werre, Aller, Diemel, Hunte, Fulda | Weser | 42%
|
| Pisuerga, Esla, Águeda, Côa, Corgo, Sousa, Tâmega | Douro | 35%
|
| Tauber, Fränkische Saale, Kinzig, Nidda | Main | 33%
|
| Sambre, Rur, Chiers, Lesse, Ourthe, Geul, Niers | Meuse | 28%
|
| Okhta, Izhora, Tosna, Mga | Neva | 23%
|