| Rank | Area (km²) | Countries | % Correct |
|---|---|---|---|
| 2 | 2,780,400 | Argentina | 100%
|
| 1 | 8,515,799 | Brazil | 100%
|
| 4 | 1,141,748 | Colombia | 93%
|
| 3 | 1,285,216 | Peru | 93%
|
| 5 | 1,098,581 | Bolivia | 90%
|
| 3 | 214,969 | Guyana | 86%
|
| 1 | 163,820 | Suriname | 86%
|
| 2 | 176,215 | Uruguay | 86%
|
| 4 | 276,841 | Ecuador | 83%
|
| 5 | 406,750 | Paraguay | 83%
|