| Modern-Day | Merger | % Correct |
|---|---|---|
| Czechia + Slovakia | Czechoslovakia | 100%
|
| Serbia + Montenegro | Yugoslavia | 79%
|
| Egypt + Syria | United Arab Republic | 57%
|
| Senegal + Gambia | Senegambia | 50%
|
| Norway + Sweden | Sweden-Norway | 29%
|
| Mali + Senegal | Mali Federation | 21%
|
| Bolivia + Peru | Peru-Bolivian Confederation | 21%
|