| Modern-Day | Merger | % Correct |
|---|---|---|
| Czechia + Slovakia | Czechoslovakia | 100%
|
| Serbia + Montenegro | Yugoslavia | 77%
|
| Egypt + Syria | United Arab Republic | 62%
|
| Senegal + Gambia | Senegambia | 54%
|
| Norway + Sweden | Sweden-Norway | 31%
|
| Mali + Senegal | Mali Federation | 23%
|
| Bolivia + Peru | Peru-Bolivian Confederation | 23%
|