| Biggest Cities in the World | 0 | - | 4.91 | 807,522 |
| Capitals of the Most Populated Countries | 0 | - | 4.96 | 128,615 |
| Biggest City by Time Zone | 0 | - | 4.88 | 69,156 |
| Biggest City in Every Country | 0 | - | 4.98 | 102,289 |
| Biggest Cities by Latitude Range | 0 | - | 4.81 | 33,020 |
| Five Most Populated Cities by Continent | 0 | - | 4.92 | 228,003 |
| Biggest Cities in the World - Extreme | 0 | - | 4.98 | 111,765 |
| Biggest Cities That Aren't World Capitals | 0 | - | 4.94 | 150,800 |
| Biggest Cities with Exceptions | 0 | - | 4.90 | 81,015 |
| Biggest Cities in the Southern Hemisphere | 0 | - | 4.87 | 85,437 |
| 100 Biggest Cities on a World Map | 0 | - | 4.99 | 421,380 |
| Ten Biggest Cities by Hemisphere | 0 | - | 4.96 | 81,157 |
| Biggest Cities in Deserts | 0 | - | 4.97 | 60,752 |
| Most Populous Cities as a Percent of Their Continent | 0 | - | 4.92 | 70,894 |
| Ten Southernmost Megacities | 0 | - | 4.84 | 65,352 |
| 100 Biggest Cities in the World with Exceptions | 0 | - | 4.98 | 68,613 |
| Biggest Cities in 4 Random Countries on a Map | 0 | - | 4.99 | 132,866 |
| Biggest Cities in the United States | 0 | - | 4.94 | 989,835 |
| Biggest Metro Areas in the USA | 0 | - | 4.98 | 368,664 |
| Biggest Spanish-Speaking Cities | 0 | - | 4.91 | 129,838 |
| Biggest Cities by Language | 0 | - | 4.96 | 247,931 |
| Largest City by Island | 0 | - | 4.87 | 72,609 |
| Biggest Cities in Europe in 1700 | 0 | - | 4.93 | 71,529 |
| Most Populous World Capitals | 0 | - | 4.94 | 176,933 |
| Biggest European Cities by Century | 0 | - | 4.99 | 146,299 |
| Megacities on a World Map | 0 | - | 4.98 | 257,648 |
| All 1M Cities by Proximity | 0 | - | 5.00 | 583,523 |
| 2,000 Biggest World Cities Furthest from a Larger City | 0 | - | 4.98 | 67,881 |
| All 3M Cities on the World Map | 0 | - | 4.95 | 75,886 |
| Every 1,000,000+ City on a Map | 0 | - | 4.99 | 116,909 |
| Biggest City in Each U.S. State | 0 | - | 4.87 | 169,926 |
| Countries With More Than 100 Million People | 0 | - | 4.99 | 167,234 |
| Five Most Populated Countries by Hemisphere | 0 | - | 4.97 | 125,256 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 337,035 |
| 100 Biggest Cities in Europe with a Map | 0 | - | 4.97 | 349,601 |
| Biggest US Cities by Decade | 0 | - | 4.95 | 169,387 |
| Biggest Cities in Asia | 0 | - | 4.95 | 118,443 |
| Biggest Cities in Asia - Extreme | 0 | - | 4.92 | 50,505 |
| Megacities on an Empty Map | 0 | - | 4.97 | 119,413 |
| African Cities in the Top 200 Worldwide | 0 | - | 4.95 | 51,656 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 175,652 |
| Countries with Megacities | 0 | - | 4.99 | 268,173 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 201,295 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 114,407 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 139,629 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 82,522 |
| Five Biggest World Cities by Letter #2 | 0 | - | 4.84 | 69,386 |
| Five Biggest World Cities by Letter #1 | 0 | - | 4.95 | 74,050 |
| 15 Largest Cities in Europe With a Map | 0 | - | 4.98 | 226,215 |
| 15 Largest Cities in Asia With a Map | 0 | - | 4.98 | 137,995 |
| 250 Biggest Cities in Europe With a Map | 0 | - | 4.91 | 116,791 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,456,818 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 383,201 |
| Second Biggest Cities by Country | 0 | - | 4.43 | 60,237 |
| Biggest Two-Word U.S. Cities | 0 | - | 4.50 | 102,690 |
| Biggest Cities by Trait #1 | 0 | - | 4.50 | 56,189 |
| Biggest City by Region | 0 | - | 4.50 | 36,430 |
| Most Populous 2nd Cities | 0 | - | 4.75 | 57,388 |
| Biggest Cities in the U.S. - Extreme | 0 | - | 4.95 | 160,290 |
| 15 Largest Cities in North America With a Map | 0 | - | 4.98 | 48,243 |
| 15 Largest Cities in the Middle East With a Map | 0 | - | 4.92 | 119,614 |
| Northernmost Major City by Country | 0 | - | 4.57 | 33,334 |
| Largest World Capitals with Exceptions | 0 | - | 4.64 | 52,466 |
| Two Largest Cities by First Two Letters | 0 | - | 4.53 | 83,638 |
| Biggest Cities in Each U.S. State - Extreme | 0 | - | 4.91 | 85,071 |
| 10 Biggest Cities by U.S. State | 0 | - | 4.95 | 42,665 |
| 500 Biggest U.S. Urban Areas | 0 | - | 4.90 | 118,531 |
| 100 Biggest Cities in North America on a Map | 0 | - | 4.84 | 63,085 |
| Ten Northernmost Megacities | 0 | - | 4.50 | 49,611 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.96 | 87,508 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 269,624 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 122,889 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 113,262 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.91 | 94,425 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 59,762 |
| Biggest Cities in Europe | 0 | - | 4.70 | 549,981 |
| Biggest English-Speaking Cities | 0 | - | 4.45 | 166,102 |
| Biggest Cities in History | 0 | - | 4.52 | 90,739 |
| Top 10 World Cities Through History | 0 | - | 4.43 | 79,259 |
| Biggest Cities once in the Spanish Empire | 0 | - | 4.87 | 56,631 |
| 15 Largest Cities in South America With a Map | 0 | - | 4.94 | 127,904 |
| Biggest World Cities within 1,000 Km | 0 | - | 4.54 | 43,660 |
| Biggest Cities in France - Extreme | 0 | - | 4.87 | 57,650 |
| Biggest World Cities in 1850 | 0 | - | 4.61 | 68,750 |
| Biggest Cities in the Blue Banana | 0 | - | 4.57 | 36,750 |
| Biggest Cities in Germany | 0 | - | 4.95 | 295,786 |
| Cities of China (With Some Help) | 0 | - | 4.91 | 31,846 |
| Biggest Cities Starting With A | 0 | - | 4.63 | 125,328 |
| Biggest Cities Starting With D | 0 | - | 4.52 | 117,304 |
| Biggest Cities Starting With H | 0 | - | 4.54 | 110,138 |
| Biggest Cities Starting With L | 0 | - | 4.44 | 123,757 |
| Biggest Cities Starting With M | 0 | - | 4.48 | 144,507 |
| Biggest Cities Starting With P | 0 | - | 4.46 | 127,934 |
| Capital City Etymologies | 0 | - | 4.77 | 63,594 |
| Airports Named for People #1 | 0 | - | 4.44 | 56,157 |
| Countries of Europe by Population | 0 | - | 4.98 | 183,809 |
| Most Populous Countries by Year | 0 | - | 4.83 | 111,727 |
| 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 | 96,002 |
| Most Populous Countries Bordering Each Other | 0 | - | 4.97 | 131,650 |
| Countries with the Most People Bordering Them | 0 | - | 4.98 | 108,923 |
| Populous Countries Bordering Smaller Countries | 0 | - | 4.97 | 113,940 |
| Densest Countries Bordering Each Other | 0 | - | 4.93 | 91,105 |
| Countries with a Population Under 1 Million by Clue | 0 | - | 4.99 | 93,293 |
| 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 | 24,939 |
| Biggest Cities by Trait #2 | 0 | - | 4.47 | 20,989 |
| 100 Biggest Cities in Italy on a Map | 0 | - | 4.89 | 97,797 |
| All Cities in China with Population of 1 Million | 0 | - | 4.82 | 46,753 |
| Biggest Cities in Sweden | 0 | - | 4.85 | 41,533 |
| 100 Biggest Cities in Germany on a Map | 0 | - | 4.92 | 100,472 |
| All Cities in India with Population of 1 Million | 0 | - | 4.84 | 48,123 |
| Five Biggest Cities by Country - Extreme | 0 | - | 4.96 | 42,479 |
| Every 100k+ City in the United States on a Map | 0 | - | 4.98 | 120,020 |
| Most Populous Countries in 2050 | 0 | - | 4.91 | 224,113 |
| First Countries to Reach 5 Million People | 0 | - | 4.93 | 136,066 |
| Most Populous Modern-Day Countries in 1000 AD | 0 | - | 4.88 | 76,644 |
| Most Populous Modern-Day Countries in 1 AD | 0 | - | 4.98 | 93,321 |
| Most Populous Modern-Day Countries in 1800 AD | 0 | - | 4.93 | 67,593 |
| Most Populous Modern-Day Countries in 1500 AD | 0 | - | 4.93 | 73,953 |
| Most Populous Modern-Day Countries by Century | 0 | - | 4.98 | 97,913 |
| Countries with the Highest Population Density | 0 | - | 4.94 | 165,886 |
| Countries with the Lowest Population Density | 0 | - | 4.98 | 171,467 |
| Biggest Cities in Europe - Extreme | 0 | - | 4.74 | 73,855 |
| Biggest Mediterranean Cities | 0 | - | 4.61 | 91,561 |
| European Cities in the Top 200 Worldwide | 0 | - | 4.70 | 68,774 |
| Most Populous Islands | 0 | - | 4.80 | 123,477 |
| Islands by Largest City #1 | 0 | - | 4.47 | 94,412 |
| Islands by Largest City #2 | 0 | - | 4.74 | 35,690 |
| Top 10 Most Populous European Countries | 0 | - | 4.97 | 235,039 |
| Top 10 Most Populous Asian Countries | 0 | - | 4.97 | 185,558 |
| Top 10 Most Populous African Countries | 0 | - | 4.99 | 195,417 |
| Top 10 Most Densely-Populated Countries in Asia | 0 | - | 4.92 | 105,152 |
| Countries by Population Decrease | 0 | - | 4.46 | 50,038 |
| Top 10 Asian Countries by Population Increase | 0 | - | 4.93 | 109,007 |
| Flags of Countries With More Than 100 Million People | 0 | - | 4.98 | 160,160 |
| Countries Gaining the Most Population by 2070 | 0 | - | 4.63 | 64,560 |
| Five Most Populated Countries on a Multicolored World Map | 0 | - | 4.98 | 74,758 |
| Least Dense Countries Bordering Each Other | 0 | - | 4.86 | 23,950 |
| Biggest Cities with a Muslim Majority | 0 | - | 4.64 | 108,239 |
| Biggest Cities in Latin America | 0 | - | 4.48 | 65,045 |
| Biggest English Cities by Century | 0 | - | 4.91 | 107,124 |
| Five Biggest Cities by Country | 0 | - | 4.70 | 167,533 |
| Biggest Cities Near a Border | 0 | - | 4.22 | 32,128 |
| Flags to Largest Cities | 0 | - | 4.54 | 51,959 |
| Most Populous Second Cities in the U.S. | 0 | - | 4.31 | 41,010 |
| Biggest World Cities A-Z | 0 | - | 4.63 | 224,484 |
| Biggest Cities Starting With B | 0 | - | 4.34 | 164,004 |
| Biggest Cities Starting With C | 0 | - | 4.12 | 105,932 |
| Biggest Cities Starting With K | 0 | - | 4.31 | 87,622 |
| Biggest Cities Starting With S | 0 | - | 4.40 | 127,529 |
| Biggest Cities Starting With T | 0 | - | 4.29 | 128,989 |
| Most Populous Countries in 1900 | 0 | - | 4.91 | 174,416 |
| Biggest Cities in the Sun Belt on a Map | 0 | - | 4.68 | 23,906 |
| Highest Fertility Countries | 0 | - | 4.90 | 27,337 |
| Boundary Waters | 0 | - | 4.92 | 88,871 |
| Countries Along the Afro-Eurasia Coast | 0 | - | 4.88 | 35,490 |
| The Same Suffixes - Geography | 0 | - | 4.98 | 96,902 |
| 100 Geography Questions of Varying Difficulty | 0 | - | 4.93 | 63,637 |
| "Second Best" Geography Edition #2 | 0 | - | 4.88 | 61,104 |
| Biggest Countries by Population - Shape Quiz | 0 | - | 4.91 | 57,894 |
| Biggest Cities Once in the Roman Empire | 0 | - | 4.81 | 76,253 |
| Top 15 Most Populous Countries Ending in "IA" | 0 | - | 4.77 | 116,289 |
| Biggest European Cities by Letter | 0 | - | 4.55 | 127,580 |
| Biggest Cities in the Commonwealth of Nations | 0 | - | 4.56 | 65,623 |
| Largest World Cities With Four Letters | 0 | - | 4.39 | 64,671 |
| Biggest Cities in Germany - Extreme | 0 | - | 4.78 | 47,116 |
| U.S. Cities With Population > 1 Million | 0 | - | 4.43 | 92,631 |
| U.S. States by Second Most Populous City | 0 | - | 4.43 | 44,218 |
| Biggest "Saint" Cities - United States | 0 | - | 4.46 | 37,042 |
| Biggest Cities with a Tropical Climate | 0 | - | 4.38 | 32,151 |
| Fastest Shrinking U.S. Cities | 0 | - | 4.44 | 40,571 |
| Cities in European Economic Areas on a Map | 0 | - | 4.73 | 18,282 |
| Biggest Cities in Australia on a Map | 0 | - | 4.62 | 38,256 |
| Countries of the World Quiz | 0 | - | 5.00 | 48,006,137 |
| Landlocked Countries | 0 | - | 4.99 | 427,697 |
| Countries Losing the Most Population by 2070 | 0 | - | 4.40 | 84,836 |
| Jewish Cities Quiz | 0 | - | 4.33 | 62,039 |
| 25 Biggest Cities of the Soviet Union | 0 | - | 4.94 | 85,004 |
| 100 Biggest US Cities in 1900 | 0 | - | 4.46 | 73,444 |
| Biggest U.S. Cities Within 200 Kilometers | 0 | - | 4.41 | 49,129 |
| Biggest U.S. Cities Within 100 Kilometers | 0 | - | 4.42 | 51,797 |
| 100 Biggest Cities in Spain on a Map | 0 | - | 4.61 | 44,753 |
| Cities in Squares on a Map - North America | 0 | - | 4.31 | 21,601 |
| Largest Nordic Cities on a Map | 0 | - | 4.78 | 37,476 |
| Cities on Interstate 90 on a Map | 0 | - | 4.45 | 32,415 |
| Biggest Urban Areas in the UK | 0 | - | 4.43 | 177,126 |
| Biggest Cities in Japan | 0 | - | 4.68 | 83,628 |
| Biggest Cities in Russia | 0 | - | 4.49 | 82,864 |
| Biggest Cities in France | 0 | - | 4.72 | 225,734 |
| Biggest Cities in Spain | 0 | - | 4.64 | 172,435 |
| Biggest Cities in The Netherlands | 0 | - | 4.50 | 56,383 |
| Biggest Cities in Poland | 0 | - | 4.62 | 54,378 |
| Biggest Cities in the UK | 0 | - | 4.48 | 106,011 |
| Biggest Cities in China | 0 | - | 4.53 | 160,295 |
| Biggest Cities in Canada | 0 | - | 4.55 | 133,717 |
| Biggest Cities in Switzerland | 0 | - | 4.52 | 47,528 |
| Biggest Cities in India | 0 | - | 4.64 | 68,144 |
