| Hint | Answer | % Correct |
|---|---|---|
| 1957 | Treaty of Rome | 100%
|
| 1992 | Maastricht Treaty | 86%
|
| 2007 | Treaty of Lisbon | 71%
|
| 1997 | Treaty of Amsterdam | 43%
|
| 1965 | Treaty of Brussels | 43%
|
| 2001 | Treaty of Nice | 43%
|
| 1951 | European Coal and Steel Community | 29%
|
| 1986 | Single European Act | 14%
|