| # | Population | Country | Answer | % Correct |
|---|---|---|---|---|
| 1 | 5,000,000 | Germany | Cologne / Dusseldorf | 98%
|
| 2 | 4,925,000 | Sri Lanka | Colombo | 98%
|
| 8 | 1,770,000 | Denmark | Copenhagen | 97%
|
| 4 | 2,875,000 | Guinea | Conakry | 90%
|
| 7 | 1,790,000 | Argentina | Córdoba | 80%
|
| 19 | 335,950 | Mexico | Córdoba | 80%
|
| 20 | 324,902 | Spain | Córdoba | 80%
|
| 5 | 2,075,000 | Benin | Cotonou | 71%
|
| 24 | 267,746 | United States | Columbus (Georg./Alab.) | 68%
|
| 6 | 1,810,000 | United States | Columbus (Ohio) | 68%
|
| 11 | 714,377 | United Kingdom | Coventry - Nuneaton | 68%
|
| 12 | 632,494 | United States | Colorado Springs | 56%
|
| 13 | 590,407 | United States | Columbia (Sth. Car.) | 56%
|
| 9 | 1,490,000 | Bolivia | Cochabamba | 46%
|
| 14 | 448,028 | Algeria | Constantine | 42%
|
| 3 | 3,000,000 | India | Coimbatore | 41%
|
| 10 | 722,929 | Chile | Concepción | 37%
|
| 25 | 263,688 | Romania | Constanta | 36%
|
| 22 | 278,612 | United States | Concord (Nth. Car.) | 25%
|
| 18 | 339,066 | United States | Corpus Christi | 15%
|
| 21 | 307,073 | Turkey | Çorlu | 7%
|
| 15 | 393,200 | Argentina | Corrientes | 5%
|
| 17 | 355,738 | Mexico | Coatzacoalcos | 2%
|
| 23 | 269,594 | Turkey | Çorum | 2%
|
| 16 | 359,803 | Philippines | Cotabato | 0%
|