| Biggest Cities in the World | 0 | - | 4.91 | 807,443 |
| Capitals of the Most Populated Countries | 0 | - | 4.96 | 128,610 |
| Biggest City by Time Zone | 0 | - | 4.88 | 69,148 |
| Biggest City in Every Country | 0 | - | 4.98 | 102,274 |
| Biggest Cities by Latitude Range | 0 | - | 4.81 | 33,012 |
| Five Most Populated Cities by Continent | 0 | - | 4.92 | 227,985 |
| Biggest Cities in the World - Extreme | 0 | - | 4.98 | 111,751 |
| Biggest Cities That Aren't World Capitals | 0 | - | 4.94 | 150,775 |
| Biggest Cities with Exceptions | 0 | - | 4.90 | 81,006 |
| Biggest Cities in the Southern Hemisphere | 0 | - | 4.87 | 85,431 |
| 100 Biggest Cities on a World Map | 0 | - | 4.99 | 421,341 |
| Ten Biggest Cities by Hemisphere | 0 | - | 4.96 | 81,152 |
| Biggest Cities in Deserts | 0 | - | 4.97 | 60,744 |
| Most Populous Cities as a Percent of Their Continent | 0 | - | 4.92 | 70,887 |
| Ten Southernmost Megacities | 0 | - | 4.84 | 65,345 |
| 100 Biggest Cities in the World with Exceptions | 0 | - | 4.98 | 68,606 |
| Biggest Cities in 4 Random Countries on a Map | 0 | - | 4.99 | 132,854 |
| Biggest Cities in the United States | 0 | - | 4.94 | 989,711 |
| Biggest Metro Areas in the USA | 0 | - | 4.98 | 368,639 |
| Countries of Europe by Population | 0 | - | 4.98 | 183,782 |
| Biggest Spanish-Speaking Cities | 0 | - | 4.91 | 129,833 |
| Biggest Cities by Language | 0 | - | 4.96 | 247,924 |
| Largest City by Island | 0 | - | 4.87 | 72,600 |
| Biggest Cities in Europe in 1700 | 0 | - | 4.93 | 71,524 |
| Most Populous World Capitals | 0 | - | 4.94 | 176,930 |
| Biggest European Cities by Century | 0 | - | 4.99 | 146,290 |
| Megacities on a World Map | 0 | - | 4.98 | 257,623 |
| All 1M Cities by Proximity | 0 | - | 5.00 | 583,467 |
| 2,000 Biggest World Cities Furthest from a Larger City | 0 | - | 4.98 | 67,873 |
| All 3M Cities on the World Map | 0 | - | 4.95 | 75,874 |
| Every 1,000,000+ City on a Map | 0 | - | 4.99 | 116,879 |
| Biggest City in Each U.S. State | 0 | - | 4.87 | 169,915 |
| Countries With More Than 100 Million People | 0 | - | 4.99 | 167,229 |
| Five Most Populated Countries by Hemisphere | 0 | - | 4.97 | 125,244 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 336,962 |
| 100 Biggest Cities in Europe with a Map | 0 | - | 4.97 | 349,575 |
| Top 10 Most Populous European Countries | 0 | - | 4.97 | 235,022 |
| Top 10 Most Populous Asian Countries | 0 | - | 4.97 | 185,545 |
| Top 10 Most Populous African Countries | 0 | - | 4.99 | 195,393 |
| Top 10 Most Densely-Populated Countries in Asia | 0 | - | 4.92 | 105,144 |
| Top 10 Asian Countries by Population Increase | 0 | - | 4.93 | 109,003 |
| Biggest US Cities by Decade | 0 | - | 4.95 | 169,325 |
| Biggest Cities in Asia | 0 | - | 4.95 | 118,426 |
| Biggest Cities in Asia - Extreme | 0 | - | 4.92 | 50,502 |
| Megacities on an Empty Map | 0 | - | 4.97 | 119,405 |
| African Cities in the Top 200 Worldwide | 0 | - | 4.95 | 51,643 |
| Five Biggest Cities by Country - Extreme | 0 | - | 4.96 | 42,471 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 175,625 |
| Countries with Megacities | 0 | - | 4.99 | 268,121 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 201,276 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 114,399 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 139,607 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 82,509 |
| Five Biggest World Cities by Letter #2 | 0 | - | 4.84 | 69,385 |
| Five Biggest World Cities by Letter #1 | 0 | - | 4.95 | 74,047 |
| 15 Largest Cities in Europe With a Map | 0 | - | 4.98 | 226,197 |
| 15 Largest Cities in Asia With a Map | 0 | - | 4.98 | 137,986 |
| 250 Biggest Cities in Europe With a Map | 0 | - | 4.91 | 116,781 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,456,706 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 383,162 |
| Second Biggest Cities by Country | 0 | - | 4.43 | 60,232 |
| Biggest Two-Word U.S. Cities | 0 | - | 4.50 | 102,689 |
| Biggest Cities by Trait #1 | 0 | - | 4.50 | 56,189 |
| Biggest City by Region | 0 | - | 4.50 | 36,428 |
| Most Populous 2nd Cities | 0 | - | 4.75 | 57,387 |
| Biggest Cities in the U.S. - Extreme | 0 | - | 4.95 | 160,276 |
| 15 Largest Cities in North America With a Map | 0 | - | 4.98 | 48,237 |
| 15 Largest Cities in the Middle East With a Map | 0 | - | 4.92 | 119,605 |
| Northernmost Major City by Country | 0 | - | 4.57 | 33,333 |
| Largest World Capitals with Exceptions | 0 | - | 4.64 | 52,465 |
| Two Largest Cities by First Two Letters | 0 | - | 4.53 | 83,637 |
| Biggest Cities in Each U.S. State - Extreme | 0 | - | 4.91 | 85,052 |
| 10 Biggest Cities by U.S. State | 0 | - | 4.95 | 42,656 |
| 500 Biggest U.S. Urban Areas | 0 | - | 4.90 | 118,511 |
| 100 Biggest Cities in North America on a Map | 0 | - | 4.84 | 63,079 |
| Ten Northernmost Megacities | 0 | - | 4.50 | 49,610 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.96 | 87,502 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 269,602 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 122,884 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 113,189 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.91 | 94,412 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 59,759 |
| Biggest Cities in Europe | 0 | - | 4.70 | 549,943 |
| Biggest English-Speaking Cities | 0 | - | 4.45 | 166,096 |
| Biggest Cities in History | 0 | - | 4.52 | 90,735 |
| Top 10 World Cities Through History | 0 | - | 4.43 | 79,249 |
| Biggest Cities once in the Spanish Empire | 0 | - | 4.87 | 56,627 |
| 15 Largest Cities in South America With a Map | 0 | - | 4.94 | 127,891 |
| Biggest World Cities within 1,000 Km | 0 | - | 4.54 | 43,657 |
| Biggest Cities in France - Extreme | 0 | - | 4.87 | 57,638 |
| Biggest World Cities in 1850 | 0 | - | 4.61 | 68,746 |
| Biggest Cities in the Blue Banana | 0 | - | 4.57 | 36,746 |
| Biggest Cities in Germany | 0 | - | 4.95 | 295,764 |
| Cities of China (With Some Help) | 0 | - | 4.91 | 31,845 |
| Biggest Cities Starting With A | 0 | - | 4.63 | 125,311 |
| Biggest Cities Starting With D | 0 | - | 4.52 | 117,292 |
| Biggest Cities Starting With H | 0 | - | 4.54 | 110,122 |
| Biggest Cities Starting With L | 0 | - | 4.44 | 123,741 |
| Biggest Cities Starting With M | 0 | - | 4.48 | 144,437 |
| Biggest Cities Starting With P | 0 | - | 4.46 | 127,920 |
| Most Populous Countries by Year | 0 | - | 4.83 | 111,706 |
| Most Populous Country by First Two Letters | 0 | - | 4.70 | 71,072 |
| Demographics Multiple Choice | 0 | - | 4.70 | 42,427 |
| Most Populated Countries Bordering the Pacific Ocean | 0 | - | 4.97 | 95,999 |
| Most Populous Countries Bordering Each Other | 0 | - | 4.97 | 131,637 |
| Countries with the Most People Bordering Them | 0 | - | 4.98 | 108,909 |
| Populous Countries Bordering Smaller Countries | 0 | - | 4.97 | 113,934 |
| Densest Countries Bordering Each Other | 0 | - | 4.93 | 91,099 |
| Countries with a Population Under 1 Million by Clue | 0 | - | 4.99 | 93,292 |
| Fastest Growing U.S. Cities | 0 | - | 4.35 | 73,209 |
| Biggest Coastal City by Country | 0 | - | 4.61 | 28,157 |
| Biggest City by Region #2 | 0 | - | 4.43 | 24,938 |
| Biggest Cities by Trait #2 | 0 | - | 4.47 | 20,986 |
| 100 Biggest Cities in Italy on a Map | 0 | - | 4.89 | 97,780 |
| All Cities in China with Population of 1 Million | 0 | - | 4.82 | 46,746 |
| Biggest Cities in Sweden | 0 | - | 4.85 | 41,528 |
| 100 Biggest Cities in Germany on a Map | 0 | - | 4.92 | 100,463 |
| All Cities in India with Population of 1 Million | 0 | - | 4.84 | 48,119 |
| Every 100k+ City in the United States on a Map | 0 | - | 4.98 | 119,963 |
| Most Populous Countries in 2050 | 0 | - | 4.91 | 224,102 |
| First Countries to Reach 5 Million People | 0 | - | 4.93 | 136,057 |
| Most Populous Modern-Day Countries in 1000 AD | 0 | - | 4.88 | 76,640 |
| Most Populous Modern-Day Countries in 1 AD | 0 | - | 4.98 | 93,314 |
| Most Populous Modern-Day Countries in 1800 AD | 0 | - | 4.93 | 67,589 |
| Most Populous Modern-Day Countries in 1500 AD | 0 | - | 4.93 | 73,947 |
| Most Populous Modern-Day Countries by Century | 0 | - | 4.98 | 97,910 |
| Countries with the Highest Population Density | 0 | - | 4.94 | 165,874 |
| Countries with the Lowest Population Density | 0 | - | 4.98 | 171,458 |
| Biggest Cities in Europe - Extreme | 0 | - | 4.74 | 73,854 |
| Biggest Mediterranean Cities | 0 | - | 4.61 | 91,557 |
| European Cities in the Top 200 Worldwide | 0 | - | 4.70 | 68,752 |
| Most Populous Islands | 0 | - | 4.80 | 123,470 |
| Islands by Largest City #1 | 0 | - | 4.47 | 94,410 |
| Islands by Largest City #2 | 0 | - | 4.74 | 35,688 |
| Countries by Population Decrease | 0 | - | 4.46 | 50,034 |
| Flags of Countries With More Than 100 Million People | 0 | - | 4.98 | 160,153 |
| Countries Gaining the Most Population by 2070 | 0 | - | 4.63 | 64,559 |
| Five Most Populated Countries on a Multicolored World Map | 0 | - | 4.98 | 74,752 |
| Least Dense Countries Bordering Each Other | 0 | - | 4.86 | 23,938 |
| Biggest Cities with a Muslim Majority | 0 | - | 4.64 | 108,232 |
| Biggest Cities in Latin America | 0 | - | 4.48 | 65,042 |
| Biggest English Cities by Century | 0 | - | 4.91 | 107,119 |
| Five Biggest Cities by Country | 0 | - | 4.70 | 167,524 |
| Biggest Cities Near a Border | 0 | - | 4.22 | 32,127 |
| Flags to Largest Cities | 0 | - | 4.54 | 51,952 |
| Most Populous Second Cities in the U.S. | 0 | - | 4.31 | 41,010 |
| Biggest World Cities A-Z | 0 | - | 4.63 | 224,470 |
| Biggest Cities Starting With B | 0 | - | 4.34 | 163,987 |
| Biggest Cities Starting With C | 0 | - | 4.12 | 105,920 |
| Biggest Cities Starting With K | 0 | - | 4.31 | 87,613 |
| Biggest Cities Starting With S | 0 | - | 4.40 | 127,514 |
| Biggest Cities Starting With T | 0 | - | 4.29 | 128,978 |
| Most Populous Countries in 1900 | 0 | - | 4.91 | 174,412 |
| Biggest Cities in the Sun Belt on a Map | 0 | - | 4.68 | 23,899 |
| Highest Fertility Countries | 0 | - | 4.90 | 27,333 |
| Boundary Waters | 0 | - | 4.92 | 88,870 |
| Countries Along the Afro-Eurasia Coast | 0 | - | 4.88 | 35,482 |
| The Same Suffixes - Geography | 0 | - | 4.98 | 96,891 |
| 100 Geography Questions of Varying Difficulty | 0 | - | 4.93 | 63,629 |
| "Second Best" Geography Edition #2 | 0 | - | 4.88 | 61,098 |
| Biggest Countries by Population - Shape Quiz | 0 | - | 4.91 | 57,890 |
| Biggest Cities Once in the Roman Empire | 0 | - | 4.81 | 76,249 |
| Total United States Immigration by Country | 0 | - | 4.91 | 112,607 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 247,178 |
| Top 15 Most Populous Countries Ending in "IA" | 0 | - | 4.77 | 116,283 |
| Biggest European Cities by Letter | 0 | - | 4.55 | 127,576 |
| Biggest Cities in the Commonwealth of Nations | 0 | - | 4.56 | 65,623 |
| Largest World Cities With Four Letters | 0 | - | 4.39 | 64,670 |
| Biggest Cities in Germany - Extreme | 0 | - | 4.78 | 47,116 |
| U.S. Cities With Population > 1 Million | 0 | - | 4.43 | 92,615 |
| U.S. States by Second Most Populous City | 0 | - | 4.43 | 44,217 |
| Biggest "Saint" Cities - United States | 0 | - | 4.46 | 37,040 |
| Biggest Cities with a Tropical Climate | 0 | - | 4.38 | 32,151 |
| Fastest Shrinking U.S. Cities | 0 | - | 4.44 | 40,571 |
| Most Populous U.S. Cities as a Percent of Their State | 0 | - | 4.78 | 55,466 |
| Cities in European Economic Areas on a Map | 0 | - | 4.73 | 18,274 |
| Biggest Cities in Australia on a Map | 0 | - | 4.62 | 38,255 |
| Countries of the World Quiz | 0 | - | 5.00 | 48,000,898 |
| Landlocked Countries | 0 | - | 4.99 | 427,635 |
| Countries Losing the Most Population by 2070 | 0 | - | 4.40 | 84,834 |
| Jewish Cities Quiz | 0 | - | 4.33 | 62,039 |
| 25 Biggest Cities of the Soviet Union | 0 | - | 4.94 | 84,997 |
| 100 Biggest US Cities in 1900 | 0 | - | 4.46 | 73,443 |
| Biggest U.S. Cities Within 200 Kilometers | 0 | - | 4.41 | 49,129 |
| Biggest U.S. Cities Within 100 Kilometers | 0 | - | 4.42 | 51,795 |
| 100 Biggest Cities in Spain on a Map | 0 | - | 4.61 | 44,744 |
| Cities in Squares on a Map - North America | 0 | - | 4.31 | 21,600 |
| Largest Nordic Cities on a Map | 0 | - | 4.78 | 37,475 |
| Cities on Interstate 90 on a Map | 0 | - | 4.45 | 32,415 |
| Biggest Urban Areas in the UK | 0 | - | 4.43 | 177,124 |
| Biggest Cities in Japan | 0 | - | 4.68 | 83,625 |
| Biggest Cities in Russia | 0 | - | 4.49 | 82,860 |
| Biggest Cities in France | 0 | - | 4.72 | 225,720 |
| Biggest Cities in Spain | 0 | - | 4.64 | 172,415 |
| Biggest Cities in The Netherlands | 0 | - | 4.50 | 56,377 |
| Biggest Cities in Poland | 0 | - | 4.62 | 54,370 |
| Biggest Cities in the UK | 0 | - | 4.48 | 106,008 |
| Biggest Cities in China | 0 | - | 4.53 | 160,285 |
| Biggest Cities in Canada | 0 | - | 4.55 | 133,708 |
| Biggest Cities in Switzerland | 0 | - | 4.52 | 47,527 |
