| Modern-Day | Merger | % Correct |
|---|---|---|
| Czechia + Slovakia | Czechoslovakia | 100%
|
| Serbia + Montenegro | Yugoslavia | 83%
|
| Egypt + Syria | United Arab Republic | 67%
|
| Senegal + Gambia | Senegambia | 58%
|
| Norway + Sweden | Sweden-Norway | 33%
|
| Mali + Senegal | Mali Federation | 25%
|
| Bolivia + Peru | Peru-Bolivian Confederation | 25%
|