| Taken | Updated | Quiz |
|---|
| 8,378 | 2016-12-16 | Top 50 oldest countries |
| 6,371 | 2016-04-03 | 100 largest empires in history |
| 5,194 | 2016-11-06 | Top 50 most famous countries |
| 4,422 | 2021-09-15 | Top 50 countries with the largest economies |
| 4,323 | 2017-01-01 | Top 50 largest countries |
| 3,892 | 2017-02-03 | Top 50 poorest countries |
| 3,838 | 2016-09-01 | Countries of the cold war |
| 3,564 | 2016-09-21 | Top 50 most powerful countries |
| 2,570 | 2018-01-29 | Countries that stayed neutral in WWII |
| 2,388 | 2018-07-08 | Top 50 countries with the most cities of over 100,000 people |
| 2,352 | 2017-01-01 | Top 50 smallest countries |
| 2,274 | 2016-03-06 | Countries with the oldest civilizations |
| 1,994 | 2016-03-28 | Top 50 most developed countries. |
| 1,743 | 2018-01-29 | Countries of the world in 1700 |
| 1,728 | 2016-11-29 | Top 50 newest countries |
| 1,689 | 2016-09-21 | Countries that have had civil wars |
| 1,549 | 2018-07-08 | Top 50 most religious countries |
| 1,379 | 2021-09-20 | Countries that hate each other |
| 1,235 | 2018-07-08 | Top 50 least religious countries |
| 1,182 | 2017-01-01 | Top 50 countries by drug use |
| 1,135 | 2016-08-17 | Top 50 northernmost countries |
| 1,127 | 2018-07-08 | Top 50 least famous countries |
| 1,019 | 2016-04-16 | Top 50 conservative countries. |
| 1,016 | 2016-08-20 | U.S enemies list |
| 919 | 2016-08-17 | Top 50 southernmost countries |
| 880 | 2017-01-01 | Top 50 countries with the most guns |
| 862 | 2017-01-01 | Countries by national stereotype |
| 718 | 2016-08-27 | Top 50 Easternmost Countries |
| 664 | 2018-07-08 | Top 50 countries with the smallest economies |
| 645 | 2016-05-04 | Top 50 least developed countries |
| 635 | 2016-08-24 | Top 50 westernmost countries |
| 605 | 2016-03-05 | Top 50 most corrupt countries |
| 583 | 2017-01-27 | Top 50 richest countries. |
| 542 | 2016-12-15 | Countries by national stereotype #2 |
| 500 | 2017-01-14 | Countries of the world in 1950 |
| 488 | 2016-03-07 | Top 50 least corrupt countries |
| 485 | 2016-09-18 | 100 richest people in the world |
| 482 | 2016-05-18 | Top 50 countries with the most internet users |
| 458 | 2017-03-31 | 100 largest cities in 2050 |
| 412 | 2017-01-22 | Top 50 countries with the largest cities |
| 357 | 2016-11-06 | Top 100 largest land masses |
| 324 | 2016-03-09 | Countries that stayed neutral in WWI |
| 286 | 2017-01-01 | Top 50 most unemployed countries |
| 286 | 2017-01-01 | Countries having a war |
| 273 | 2017-01-31 | Countries of the world by independence |
| 266 | 2018-07-15 | MCU character deaths |
| 246 | 2016-09-21 | Countries that have had coups |
| 240 | 2018-08-08 | Top 50 countries with the largest parliamentary bodies |
| 229 | 2016-02-06 | Countries mentioned in World War Z |
| 223 | 2016-04-24 | 50 largest cities in 1950. |
| 197 | 2016-11-06 | Alternate History Tropes |
| 188 | 2016-08-01 | Countries visited by President Obama |
| 175 | 2016-01-18 | Countries of the world in 1850 |
| 147 | 2016-04-20 | Countries of the 19th century. |
| 144 | 2015-11-02 | Countries of the world by year of formation |
| 130 | 2016-01-05 | Countries with state religions |
| 122 | 2016-04-05 | Countries of the 20th century |
| 118 | 2017-01-03 | Most important events by year 1801-1900 |
| 105 | 2021-09-15 | Election years |
| 84 | 2016-01-25 | Year when it happened |
| 80 | 2018-07-16 | Countries with no major cities |
| 76 | 2017-01-01 | Countries of the world by longest river |
| 74 | 2016-02-09 | Democratic nations list |
| 68 | 2016-02-01 | Countries of the world in 1 AD |
| 51 | 2016-01-27 | Largest cities by state |
| 50 | 2017-03-03 | Countries of the world by largest city |
| 48 | 2016-11-09 | States won by Trump |
| 43 | 2020-04-23 | Star Wars Character Deaths |
| 41 | 2017-01-01 | Leaders by date and location |
| 40 | 2017-01-01 | Countries of the world by largest island |
