| Taken | Quiz |
|---|---|
| 1,371,678 | Countries With the Highest Population |
| 362,425 | Smallest Countries by Population and Area |
| 292,965 | Most Populous Countries A-Z |
| 267,059 | Top 50 Countries by Population - In Order |
| 255,795 | Five Most Populated Countries by Continent |
| 218,114 | Top 10 Most Populous European Countries |
| 213,312 | Most Populous Countries in 2050 |
| 171,302 | Top 10 Most Populous Asian Countries |
| 168,407 | Top 10 Most Populous African Countries |
| 167,574 | Most Populous Countries in 1900 |
| 165,686 | Least Populous Countries A-Z |
| 164,426 | Largest Countries by Area or Population |
| 162,459 | Countries with the Lowest Population Density |
| 158,647 | Countries with the Highest Population Density |
| 156,231 | Countries More Populous Than Their Neighbors |