| 100% | YARRA | 5 | River in Victoria, Australia, which flows westward to Melbourne |
| 87% | YARRA | 5 | River in Victoria, Australia that flows westward to Melbourne |
| 52% | ORD | 3 | River in Western Australia that flows north to the Timor Sea |
| 50% | ADIGE | 5 | River in N Italy which flows to the Adriatic via Verona |
| 50% | ORD | 3 | River in Western Australia that flows north to Cambridge Gulf and the Timor Sea |
| 50% | SWAN | 4 | River in SW Australia that flows to the Indian Ocean below Perth |
| 50% | SWAN | 4 | River in southwest Australia that flows to the Indian Ocean below Perth |
| 47% | ANGARA | 6 | River in Siberia flowing from Lake Baikal to the Yenisei River upon which Irkutsk stands |
| 42% | BALLARAT | 8 | City in Victoria, Australia, on Yarrowee River |
| 41% | DNIEPER | 7 | River rising in Russia near Smolensk which flows south to the Black Sea |
| 40% | MAIN | 4 | River in Germany that flows through Wurzburg to the Rhine |
| 40% | DEMERARA | 8 | River in Guyana flowing north to the Atlantic at Georgetown |
| 39% | EBRO | 4 | River in Spain that flows to the Mediterranean southwest of Tarragona |
| 39% | UGIE | 4 | River in Scotland that flows to the North Sea at Peterhead |
| 39% | WESER | 5 | River in Germany that flows to the North Sea at Bremerhaven |
| 39% | DEE | 3 | River in North Wales and Cheshire that flows to the Irish Sea |
| 39% | OUSE | 4 | River in England that flows to the Wash near King's Lynn |
| 38% | FITZROY | 7 | River in Western Australia also known as Raparapa that flows into King Sound |
| 38% | SPEY | 4 | River in Scotland that flows through the Grampian Mountains to the Moray Firth |
| 38% | WESER | 5 | River in which the Pied Piper drowned Hamelin’s rats, according to legend |
| 38% | LENA | 4 | River in Russia that rises in Siberia before flowing to the Laptev Sea |
| 38% | ERIE | 4 | Lake which the Detroit River flows to |
| 38% | TAW | 3 | River that flows from Dartmoor to Barnstaple Bay in Devon |
| 37% | DRIN | 4 | River rising in Macedonia that flows through Albania to the Adriatic |
| 37% | ADIGE | 5 | River in North Italy that flows to the Adriatic via Verona |
| 37% | ADIGE | 5 | River in N Italy that flows to the Adriatic via Verona |
| 37% | ADIGE | 5 | River in northern Italy that flows to the Adriatic via Verona |
| 37% | SAVA | 4 | River rising in Slovenia that flows to the Danube at Belgrade |
| 37% | SIRET | 5 | River rising in Ukraine that flows through Romania to the Danube |
| 37% | RAFT | 4 | Craft in which to go down a river, say |