| Rank | Population | Country | Hint | City | % Correct |
|---|---|---|---|---|---|
| 1 | 868'000 | Croatia | The only capital which starts with this letter | Zagreb | 100%
|
| 4 | 400'000 | Switzerland | Financial centre | Zurich | 99%
|
| 3 | 601'000 | Spain | Basilica of Our Lady of the Pillar | Zaragoza | 85%
|
| 5 | 297'000 | Ukraine | Mykhailivska Street | Zhytomyr | 18%
|
| 2 | 850'000 | Ukraine | Khortytsia | Zaporozhye | 16%
|
| 7 | 199'000 | Poland | In the greater Silesian metropolitan area | Zabrze | 12%
|
| 6 | 207'000 | Russia | Suburb of Moscow | Zelenograd | 10%
|
| 8 | 198'000 | Russia | Weapon engraving | Zlatoust | 5%
|