| 100% | TONE | 4 | Japan's second longest river (200 miles) |
| 57% | AMAZON | 6 | World's second longest river |
| 50% | EBRO | 4 | Second longest river in Spain |
| 50% | GODAVARI | 8 | Second longest river in India |
| 49% | AMAZON | 6 | Second longest river in the world |
| 48% | NILE | 4 | River that's over 4,000 miles long |
| 47% | CONGO | 5 | Second longest African river |
| 46% | HUANG | 5 | China's second-longest river |
| 46% | EBRO | 4 | Spain's second-longest river |
| 46% | DANUBE | 6 | Europe's second-longest river |
| 46% | CONGO | 5 | Africa's second-longest river |
| 46% | DANUBE | 6 | Europe’s second-longest river |
| 46% | AMAZON | 6 | The world's second-longest river |
| 44% | RHINE | 5 | Germany’s second-longest river (after the Danube) |
| 41% | AMAZON | 6 | Second-longest river |
| 41% | SOR | 3 | 30 mile long river that's the only salmon river in Galicia |
| 41% | ELBE | 4 | German river, 724 miles long |
| 40% | OSAKA | 5 | Japan's second city |
| 40% | EDER | 4 | 110 mile long German river where it's been popular to pan for gold since 1308 |
| 40% | HUANG | 5 | Second-longest river of China |
| 40% | EBRO | 4 | Second-longest river in Iberia |
| 40% | CONGO | 5 | Second-longest river in Africa |
| 40% | OSAKA | 5 | Japan's second-largest city |
| 39% | FUKUOKA | 7 | Japan's second-largest port city |
| 39% | CONGO | 5 | Second-longest African river |
| 39% | THAMES | 6 | Second-longest UK river |
| 38% | RIO | 3 | ___ Grande (river that's about 1,900 miles long) |
| 38% | PARANA | 6 | Second-longest South American river |
| 38% | CONGO | 5 | River more than 2,700 miles long that crosses the Equator twice |
| 37% | HOKKAIDO | 8 | Japan's second-largest island; Sapporo is capital |