| First Countries to Reach 5 Million People | 0 | - | 4.90 | 110,365 |
| Most Populous Modern-Day Countries in 1000 AD | 0 | - | 4.85 | 69,080 |
| Most Populous Modern-Day Countries in 1 AD | 0 | - | 4.97 | 76,638 |
| Most Populous Modern-Day Countries in 1800 AD | 0 | - | 4.91 | 54,012 |
| Most Populous Modern-Day Countries in 1500 AD | 0 | - | 4.92 | 67,346 |
| Most Populous Modern-Day Countries by Century | 0 | - | 4.98 | 87,677 |
| Most Populous Countries in 1900 | 0 | - | 4.92 | 162,934 |
| Most Populous Countries by Year | 0 | - | 4.81 | 94,900 |
| Most Populous Countries in 2050 | 0 | - | 4.91 | 206,712 |
| Countries With More Than 100 Million People | 0 | - | 4.98 | 138,727 |
| Five Most Populated Countries by Hemisphere | 0 | - | 4.96 | 110,793 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 127,812 |
| Countries with Megacities | 0 | - | 4.99 | 200,109 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 173,658 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.97 | 99,119 |
| Countries With More than 200 Million People | 0 | - | 4.93 | 97,191 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 65,100 |
| Top 50 Countries by Population - In Order | 0 | - | 4.97 | 250,934 |
| Independence from Whom | 0 | - | 4.99 | 187,800 |
| Who Controlled These Colonies? | 0 | - | 4.89 | 114,752 |
| Most Recently-Settled Countries | 0 | - | 4.92 | 49,571 |
| Countries of the World in 1938 Quiz | 0 | - | 4.96 | 78,940 |
| Countries by Founding Story | 0 | - | 4.93 | 55,506 |
| Biggest Countries by Population | 0 | - | 4.99 | 1,321,675 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 351,905 |
| Biggest Cities in the World | 0 | - | 4.90 | 696,134 |
| Capitals of the Most Populated Countries | 0 | - | 4.96 | 117,638 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.94 | 66,906 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 247,027 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 109,934 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 103,936 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.94 | 71,554 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 51,015 |
| Biggest City by Time Zone | 0 | - | 4.84 | 55,336 |
| Biggest City in Every Country | 0 | - | 4.98 | 80,283 |
| Five Most Populated Cities by Continent | 0 | - | 4.95 | 172,441 |
| Biggest Cities in the World - Extreme | 0 | - | 4.98 | 93,324 |
| 10 Biggest Cities That Aren't World Capitals | 0 | - | 4.95 | 98,416 |
| Biggest Cities with Exceptions | 0 | - | 4.91 | 66,067 |
| Biggest Cities in the Southern Hemisphere | 0 | - | 4.84 | 72,654 |
| 100 Biggest Cities on a World Map | 0 | - | 4.99 | 375,584 |
| Ten Biggest Cities by Hemisphere | 0 | - | 4.95 | 66,277 |
| Biggest Cities in Deserts | 0 | - | 4.94 | 42,773 |
| Most Populous Cities as a Percent of Their Continent | 0 | - | 4.91 | 60,387 |
| Ten Southernmost Megacities | 0 | - | 4.81 | 46,745 |
| 100 Biggest Cities in the World with Exceptions | 0 | - | 4.97 | 56,101 |
| Biggest Cities in 4 Random Countries on a Map | 0 | - | 4.99 | 108,384 |
| Biggest Cities in the United States | 0 | - | 4.93 | 842,903 |
| Biggest Metro Areas in the USA | 0 | - | 4.98 | 337,089 |
| Most Populous Countries in 1800 | 0 | - | 4.34 | 38,776 |
| Cities by Former Name | 0 | - | 4.86 | 72,165 |
| Recently Independent Countries Quiz | 0 | - | 4.98 | 145,588 |
| Countries of the World in 1900 | 0 | - | 4.87 | 67,657 |
| Countries of the World in 1914 with a Map | 0 | - | 4.99 | 172,358 |
| Countries of the World in 1945 with a Map | 0 | - | 5.00 | 129,665 |
| Countries by Former Name | 0 | - | 4.99 | 114,765 |
| Historical City to Country | 0 | - | 4.82 | 72,768 |
| Countries of Europe by Population | 0 | - | 4.98 | 129,603 |
| Most Populous Country by First Two Letters | 0 | - | 4.75 | 67,413 |
| Demographics Multiple Choice | 0 | - | 4.64 | 40,028 |
| Most Populated Countries Bordering the Pacific Ocean | 0 | - | 4.97 | 79,083 |
| Most Populous Countries Bordering Each Other | 0 | - | 4.96 | 97,662 |
| Countries with the Most People Bordering Them | 0 | - | 4.97 | 82,510 |
| Populous Countries Bordering Smaller Countries | 0 | - | 4.97 | 94,399 |
| Densest Countries Bordering Each Other | 0 | - | 4.93 | 72,004 |
| Countries with a Population Under 1 Million by Clue | 0 | - | 4.99 | 86,479 |
| Biggest Spanish-Speaking Cities | 0 | - | 4.87 | 109,700 |
| Biggest Cities by Language | 0 | - | 4.95 | 215,545 |
| Biggest Cities in Europe, 1700 A.D. | 0 | - | 4.95 | 65,173 |
| Most Populous World Capitals | 0 | - | 4.93 | 149,716 |
| Biggest European Cities by Century | 0 | - | 4.98 | 119,830 |
| Megacities on a World Map | 0 | - | 4.98 | 222,689 |
| All 1M Cities by Proximity | 0 | - | 5.00 | 519,389 |
| 2,000 Biggest World Cities Furthest from a Larger City | 0 | - | 4.98 | 60,455 |
| All 3M Cities on the World Map | 0 | - | 4.95 | 64,157 |
| Every 1,000,000+ City on a Map | 0 | - | 4.99 | 85,700 |
| Biggest City in Each U.S. State | 0 | - | 4.83 | 152,443 |
| Former Capitals Quiz | 0 | - | 4.81 | 58,345 |
| Countries Settled by Vikings | 0 | - | 4.93 | 112,200 |
| Warsaw Pact Countries | 0 | - | 4.84 | 80,502 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.92 | 50,922 |
| Countries of Europe in 1444 | 0 | - | 4.93 | 88,028 |
| Countries of the World in 1444 | 0 | - | 4.98 | 50,587 |
| Modern-Day Countries of the Inca Empire on a Map | 0 | - | 4.81 | 50,117 |
| Countries with the Highest Population Density | 0 | - | 4.93 | 144,917 |
| Countries with the Lowest Population Density | 0 | - | 4.97 | 147,111 |
| Most Populous Countries in 1950 | 0 | - | 4.50 | 71,189 |
| Most Populous Islands | 0 | - | 4.71 | 113,494 |
| Islands by Largest City #1 | 0 | - | 4.48 | 82,474 |
| Top 10 Most Populous European Countries | 0 | - | 4.98 | 208,014 |
| Top 10 Most Populous Asian Countries | 0 | - | 4.96 | 163,091 |
| Top 10 Most Populous African Countries | 0 | - | 4.98 | 159,374 |
| Top 10 Most Densely-Populated Countries in Asia | 0 | - | 4.90 | 81,869 |
| Countries by Population Decrease | 0 | - | 4.43 | 46,819 |
| Top 10 Asian Countries by Population Increase | 0 | - | 4.92 | 90,220 |
| Flags of Countries With More Than 100 Million People | 0 | - | 4.97 | 147,179 |
| Countries Gaining the Most Population by 2070 | 0 | - | 4.55 | 50,124 |
| Five Most Populated Countries on a Multicolored World Map | 0 | - | 4.97 | 65,163 |
| Least Dense Countries Bordering Each Other | 0 | - | 4.90 | 7,264 |
| Biggest US Cities by Decade | 0 | - | 4.95 | 155,880 |
| Biggest Cities in Asia | 0 | - | 4.94 | 97,157 |
| Biggest Cities in Asia - Extreme | 0 | - | 4.91 | 44,082 |
| Biggest Cities in the World - 2100 | 0 | - | 4.29 | 82,340 |
| Megacities on an Empty Map | 0 | - | 4.95 | 88,297 |
| African Cities in the Top 200 Worldwide | 0 | - | 4.93 | 42,541 |
| Three Biggest Cities by Time Zone With Map | 0 | - | 4.97 | 28,109 |
| Ancient City to Country | 0 | - | 4.76 | 101,550 |
| City-States | 0 | - | 4.54 | 35,036 |
| Damaged and Destroyed Cities | 0 | - | 4.41 | 42,067 |
| City Where It Happened #2 | 0 | - | 4.44 | 50,471 |
| Countries by Independence Day Quiz | 0 | - | 4.63 | 44,627 |
| Former Countries by Capital | 0 | - | 4.44 | 104,325 |
| Former Countries | 0 | - | 4.72 | 125,241 |
| Guerrillas by Country | 0 | - | 4.45 | 38,765 |
| Flags of Countries of the World in 1910 | 0 | - | 4.95 | 69,710 |
| Battle to Country | 0 | - | 4.92 | 36,299 |
| Modern-Day Countries of the Umayyad Caliphate on a Map | 0 | - | 4.98 | 61,887 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 135,070 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 63,919 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.93 | 50,453 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.97 | 59,694 |
| Boundary Waters | 0 | - | 4.93 | 81,604 |
| The Same Suffixes - Geography | 0 | - | 4.98 | 75,860 |
| 100 Geography Questions of Varying Difficulty | 0 | - | 4.92 | 46,284 |
| "Second Best" Geography Edition #2 | 0 | - | 4.87 | 52,089 |
| "Second Best" Geography Edition #3 | 0 | - | 4.89 | 60,938 |
| Biggest Countries by Population - Shape Quiz | 0 | - | 4.89 | 51,163 |
| Five Biggest World Cities by Letter #2 | 0 | - | 4.83 | 64,185 |
| Five Biggest World Cities by Letter #1 | 0 | - | 4.94 | 68,312 |
| 15 Largest Cities in Europe With a Map | 0 | - | 4.97 | 201,968 |
| 15 Largest Cities in Asia With a Map | 0 | - | 4.97 | 121,790 |
| 100 Biggest Cities in Europe with a Map | 0 | - | 4.97 | 307,575 |
| 250 Biggest Cities in Europe With a Map | 0 | - | 4.89 | 99,140 |
| All 100k+ Cities in Europe on a Map | 0 | - | 4.98 | 82,040 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 94,673 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 94,621 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 101,501 |
| Top 15 Most Populous Countries Ending in "IA" | 0 | - | 4.75 | 93,743 |
| Biggest Two-Word U.S. Cities | 0 | - | 4.50 | 98,101 |
| Biggest Cities by Trait #1 | 0 | - | 4.45 | 43,241 |
| Biggest City by Region | 0 | - | 4.50 | 33,918 |
| Most Populous 2nd Cities | 0 | - | 4.75 | 53,762 |
| Largest World Capitals with Exceptions | 0 | - | 4.72 | 50,545 |
| Two Largest Cities by First Two Letters | 0 | - | 4.58 | 77,467 |
| Ten Northernmost Megacities | 0 | - | 4.50 | 47,259 |
| Countries of the World Quiz | 0 | - | 5.00 | 41,432,778 |
| Landlocked Countries Quiz | 0 | - | 4.99 | 330,554 |
| Save Humanity by Guessing Countries | 0 | - | 4.99 | 367,789 |
| Countries of Europe in 1000 with a Map | 0 | - | 4.79 | 36,690 |
| Countries Along the Afro-Eurasia Coast | 0 | - | 4.83 | 30,606 |
| Islands by Largest City #2 | 0 | - | 4.72 | 26,946 |
| Countries Losing the Most Population by 2070 | 0 | - | 4.39 | 79,270 |
| Biggest Cities in Europe | 0 | - | 4.76 | 470,488 |
| Biggest Cities in the U.S. - Extreme | 0 | - | 4.95 | 142,580 |
| Biggest Cities in Germany - Extreme | 0 | - | 4.84 | 44,442 |
| 15 Largest Cities in the Middle East With a Map | 0 | - | 4.92 | 103,976 |
| Biggest Cities in Each U.S. State - Extreme | 0 | - | 4.91 | 70,379 |
| 500 Biggest US Cities | 0 | - | 4.88 | 99,848 |
| 100 Biggest Cities in North America on a Map | 0 | - | 4.82 | 53,279 |
| Cities by Founder and Date | 0 | - | 4.55 | 28,006 |
| City Where It Happened #1 | 0 | - | 4.28 | 102,340 |
| World Capitals Quiz | 0 | - | 5.00 | 4,541,951 |
| Countries Unconquered since 1850 | 0 | - | 4.38 | 62,556 |
| Longest Uninterrupted Democracies | 0 | - | 4.07 | 31,791 |
| Most Recent Country To ... | 0 | - | 4.34 | 52,014 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 67,550 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,131,775 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,198,807 |
| Biggest Mongol Empire Countries | 0 | - | 4.91 | 67,883 |
| World Geography on a Map #1 | 0 | - | 4.93 | 67,925 |
| Geography Tile Select Quiz | 0 | - | 4.98 | 85,065 |
| Population Trivia | 0 | - | 4.35 | 26,413 |
| Top 10 Least Populous U.S. States | 0 | - | 4.93 | 174,165 |
| Top 10 Most Populous U.S. States | 0 | - | 4.97 | 151,124 |
| Biggest English-Speaking Cities | 0 | - | 4.42 | 136,793 |
| Biggest City by Island | 0 | - | 4.57 | 45,981 |
| Biggest Cities in History | 0 | - | 4.50 | 81,348 |
| Top 10 World Cities Through History | 0 | - | 4.43 | 68,313 |
| Biggest Cities once in the Spanish Empire | 0 | - | 4.88 | 51,301 |
| 15 Largest Cities in South America With a Map | 0 | - | 4.94 | 93,090 |
| Biggest World Cities within 1,000 Km | 0 | - | 4.50 | 40,390 |
| 10 Biggest Cities by U.S. State | 0 | - | 4.91 | 29,876 |
| Biggest Cities in France - Extreme | 0 | - | 4.89 | 44,818 |
| Biggest World Cities in 1850 | 0 | - | 4.63 | 64,904 |
| Biggest Cities in the Blue Banana | 0 | - | 4.57 | 32,051 |
| Biggest Cities in Germany | 0 | - | 4.95 | 266,169 |
| Biggest Cities Starting With A | 0 | - | 4.55 | 113,342 |
| Biggest Cities Starting With D | 0 | - | 4.49 | 107,609 |
| Biggest Cities Starting With H | 0 | - | 4.55 | 98,614 |
| Biggest Cities Starting With L | 0 | - | 4.44 | 111,515 |
| Biggest Cities Starting With M | 0 | - | 4.50 | 129,966 |
| Biggest Cities Starting With P | 0 | - | 4.47 | 115,651 |
| Important Cities in European History | 0 | - | 4.55 | 110,281 |
| Europe Capitals Quiz | 0 | - | 5.00 | 1,398,130 |
| Spanish-Speaking Countries | 0 | - | 4.94 | 343,302 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 223,494 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 359,726 |
| Members of the Arab League | 0 | - | 4.85 | 64,827 |
| Island Countries Quiz | 0 | - | 4.99 | 665,437 |
| Sahara Desert Countries | 0 | - | 4.97 | 129,097 |
