| Biggest Cities in the World | 0 | - | 4.91 | 801,013 |
| Capitals of the Most Populated Countries | 0 | - | 4.96 | 128,077 |
| Biggest City by Time Zone | 0 | - | 4.88 | 68,291 |
| Biggest City in Every Country | 0 | - | 4.98 | 101,033 |
| Five Most Populated Cities by Continent | 0 | - | 4.92 | 225,894 |
| Biggest Cities in the World - Extreme | 0 | - | 4.98 | 110,753 |
| Biggest Cities That Aren't World Capitals | 0 | - | 4.95 | 134,856 |
| Biggest Cities with Exceptions | 0 | - | 4.90 | 80,141 |
| Biggest Cities in the Southern Hemisphere | 0 | - | 4.87 | 84,764 |
| 100 Biggest Cities on a World Map | 0 | - | 4.99 | 418,777 |
| Ten Biggest Cities by Hemisphere | 0 | - | 4.96 | 80,268 |
| Biggest Cities in Deserts | 0 | - | 4.97 | 60,174 |
| Most Populous Cities as a Percent of Their Continent | 0 | - | 4.91 | 70,284 |
| Ten Southernmost Megacities | 0 | - | 4.87 | 64,839 |
| 100 Biggest Cities in the World with Exceptions | 0 | - | 4.98 | 67,913 |
| Biggest Cities in 4 Random Countries on a Map | 0 | - | 4.99 | 131,142 |
| Biggest Cities in the United States | 0 | - | 4.94 | 981,188 |
| Biggest Metro Areas in the USA | 0 | - | 4.98 | 366,794 |
| Biggest Spanish-Speaking Cities | 0 | - | 4.91 | 129,064 |
| Biggest Cities by Language | 0 | - | 4.96 | 246,990 |
| Largest City by Island | 0 | - | 4.87 | 72,074 |
| Biggest Cities in Europe in 1700 | 0 | - | 4.93 | 71,168 |
| Most Populous World Capitals | 0 | - | 4.94 | 176,210 |
| Biggest European Cities by Century | 0 | - | 4.99 | 145,780 |
| Megacities on a World Map | 0 | - | 4.98 | 255,365 |
| All 1M Cities by Proximity | 0 | - | 5.00 | 579,463 |
| 2,000 Biggest World Cities Furthest from a Larger City | 0 | - | 4.98 | 67,517 |
| All 3M Cities on the World Map | 0 | - | 4.95 | 75,192 |
| Every 1,000,000+ City on a Map | 0 | - | 4.99 | 115,239 |
| Biggest City in Each U.S. State | 0 | - | 4.87 | 168,716 |
| Countries With More Than 100 Million People | 0 | - | 4.99 | 166,435 |
| Five Most Populated Countries by Hemisphere | 0 | - | 4.97 | 124,446 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 331,712 |
| 100 Biggest Cities in Europe with a Map | 0 | - | 4.97 | 346,776 |
| Biggest US Cities by Decade | 0 | - | 4.95 | 168,557 |
| Biggest Cities in Asia | 0 | - | 4.95 | 117,368 |
| Biggest Cities in Asia - Extreme | 0 | - | 4.92 | 50,222 |
| Megacities on an Empty Map | 0 | - | 4.97 | 118,722 |
| African Cities in the Top 200 Worldwide | 0 | - | 4.95 | 51,189 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 173,939 |
| Countries with Megacities | 0 | - | 4.99 | 264,656 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 199,773 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,494 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 138,036 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 81,565 |
| Five Biggest World Cities by Letter #2 | 0 | - | 4.84 | 69,002 |
| Five Biggest World Cities by Letter #1 | 0 | - | 4.95 | 73,631 |
| 15 Largest Cities in Europe With a Map | 0 | - | 4.98 | 224,831 |
| 15 Largest Cities in Asia With a Map | 0 | - | 4.98 | 137,106 |
| 250 Biggest Cities in Europe With a Map | 0 | - | 4.91 | 115,714 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,448,456 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 381,034 |
| Second Biggest Cities by Country | 0 | - | 4.43 | 59,754 |
| Biggest Two-Word U.S. Cities | 0 | - | 4.50 | 102,566 |
| Biggest Cities by Trait #1 | 0 | - | 4.50 | 56,050 |
| Biggest City by Region | 0 | - | 4.50 | 36,286 |
| Most Populous 2nd Cities | 0 | - | 4.75 | 57,197 |
| Biggest Cities in the U.S. - Extreme | 0 | - | 4.95 | 159,556 |
| 15 Largest Cities in North America With a Map | 0 | - | 4.98 | 47,562 |
| 15 Largest Cities in the Middle East With a Map | 0 | - | 4.92 | 118,748 |
| Northernmost Major City by Country | 0 | - | 4.57 | 33,227 |
| Largest World Capitals with Exceptions | 0 | - | 4.64 | 52,382 |
| Two Largest Cities by First Two Letters | 0 | - | 4.52 | 83,361 |
| Biggest Cities in Each U.S. State - Extreme | 0 | - | 4.91 | 83,102 |
| 10 Biggest Cities by U.S. State | 0 | - | 4.95 | 42,048 |
| 500 Biggest U.S. Urban Areas | 0 | - | 4.90 | 117,471 |
| 100 Biggest Cities in North America on a Map | 0 | - | 4.84 | 62,496 |
| Ten Northernmost Megacities | 0 | - | 4.50 | 49,457 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.96 | 86,952 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 268,228 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 122,172 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,579 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 93,753 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 59,235 |
| Biggest Cities in Europe | 0 | - | 4.73 | 547,256 |
| Biggest English-Speaking Cities | 0 | - | 4.44 | 164,852 |
| Biggest Cities in History | 0 | - | 4.52 | 90,306 |
| Top 10 World Cities Through History | 0 | - | 4.43 | 78,161 |
| Biggest Cities once in the Spanish Empire | 0 | - | 4.87 | 56,304 |
| 15 Largest Cities in South America With a Map | 0 | - | 4.95 | 126,564 |
| Biggest World Cities within 1,000 Km | 0 | - | 4.53 | 43,489 |
| Biggest Cities in France - Extreme | 0 | - | 4.87 | 56,981 |
| Biggest World Cities in 1850 | 0 | - | 4.61 | 68,540 |
| Biggest Cities in the Blue Banana | 0 | - | 4.57 | 36,490 |
| Biggest Cities in Germany | 0 | - | 4.95 | 294,031 |
| Cities of China (With Some Help) | 0 | - | 4.91 | 31,641 |
| Biggest Cities Starting With A | 0 | - | 4.62 | 124,521 |
| Biggest Cities Starting With D | 0 | - | 4.52 | 116,777 |
| Biggest Cities Starting With H | 0 | - | 4.54 | 109,568 |
| Biggest Cities Starting With L | 0 | - | 4.44 | 123,178 |
| Biggest Cities Starting With M | 0 | - | 4.48 | 143,605 |
| Biggest Cities Starting With P | 0 | - | 4.46 | 127,288 |
| Capital City Etymologies | 0 | - | 4.77 | 63,394 |
| Airports Named for People #1 | 0 | - | 4.44 | 55,995 |
| Countries of Europe by Population | 0 | - | 4.98 | 181,483 |
| Most Populous Countries by Year | 0 | - | 4.83 | 110,883 |
| Most Populous Country by First Two Letters | 0 | - | 4.70 | 70,910 |
| Demographics Multiple Choice | 0 | - | 4.70 | 42,304 |
| Most Populated Countries Bordering the Pacific Ocean | 0 | - | 4.97 | 95,706 |
| Most Populous Countries Bordering Each Other | 0 | - | 4.97 | 130,747 |
| Countries with the Most People Bordering Them | 0 | - | 4.98 | 108,165 |
| Populous Countries Bordering Smaller Countries | 0 | - | 4.97 | 113,342 |
| Densest Countries Bordering Each Other | 0 | - | 4.93 | 90,500 |
| Countries with a Population Under 1 Million by Clue | 0 | - | 4.99 | 92,991 |
| Fastest Growing U.S. Cities | 0 | - | 4.35 | 73,087 |
| Biggest Coastal City by Country | 0 | - | 4.61 | 28,095 |
| Biggest City by Region #2 | 0 | - | 4.43 | 24,851 |
| Biggest Cities by Latitude Range | 0 | - | 4.78 | 27,573 |
| Biggest Cities by Trait #2 | 0 | - | 4.47 | 20,728 |
| 100 Biggest Cities in Italy on a Map | 0 | - | 4.88 | 96,550 |
| All Cities in China with Population of 1 Million | 0 | - | 4.82 | 46,236 |
| Biggest Cities in Sweden | 0 | - | 4.84 | 41,281 |
| 100 Biggest Cities in Germany on a Map | 0 | - | 4.92 | 99,185 |
| All Cities in India with Population of 1 Million | 0 | - | 4.83 | 47,658 |
| Five Biggest Cities by Country - Extreme | 0 | - | 4.96 | 41,787 |
| Every 100k+ City in the United States on a Map | 0 | - | 4.97 | 114,631 |
| Most Populous Countries in 2050 | 0 | - | 4.91 | 223,246 |
| First Countries to Reach 5 Million People | 0 | - | 4.93 | 135,516 |
| Most Populous Modern-Day Countries in 1000 AD | 0 | - | 4.88 | 76,307 |
| Most Populous Modern-Day Countries in 1 AD | 0 | - | 4.98 | 92,925 |
| Most Populous Modern-Day Countries in 1800 AD | 0 | - | 4.93 | 67,340 |
| Most Populous Modern-Day Countries in 1500 AD | 0 | - | 4.93 | 73,646 |
| Most Populous Modern-Day Countries by Century | 0 | - | 4.98 | 97,417 |
| Countries with the Highest Population Density | 0 | - | 4.95 | 165,208 |
| Countries with the Lowest Population Density | 0 | - | 4.98 | 170,369 |
| Biggest Cities in Europe - Extreme | 0 | - | 4.74 | 73,584 |
| Biggest Mediterranean Cities | 0 | - | 4.61 | 91,362 |
| European Cities in the Top 200 Worldwide | 0 | - | 4.70 | 66,929 |
| Most Populous Islands | 0 | - | 4.80 | 123,053 |
| Islands by Largest City #1 | 0 | - | 4.47 | 94,327 |
| Islands by Largest City #2 | 0 | - | 4.74 | 35,571 |
| Top 10 Most Populous European Countries | 0 | - | 4.97 | 233,345 |
| Top 10 Most Populous Asian Countries | 0 | - | 4.97 | 184,254 |
| Top 10 Most Populous African Countries | 0 | - | 4.99 | 193,669 |
| Top 10 Most Densely-Populated Countries in Asia | 0 | - | 4.92 | 104,354 |
| Countries by Population Decrease | 0 | - | 4.46 | 49,878 |
| Top 10 Asian Countries by Population Increase | 0 | - | 4.93 | 108,580 |
| Flags of Countries With More Than 100 Million People | 0 | - | 4.97 | 159,538 |
| Countries Gaining the Most Population by 2070 | 0 | - | 4.63 | 64,322 |
| Five Most Populated Countries on a Multicolored World Map | 0 | - | 4.98 | 74,166 |
| Least Dense Countries Bordering Each Other | 0 | - | 4.85 | 23,525 |
| Biggest Cities with a Muslim Majority | 0 | - | 4.70 | 107,904 |
| Biggest Cities in Latin America | 0 | - | 4.48 | 64,822 |
| Biggest English Cities by Century | 0 | - | 4.90 | 106,476 |
| Five Biggest Cities by Country | 0 | - | 4.69 | 166,828 |
| Biggest Cities Near a Border | 0 | - | 4.22 | 32,000 |
| Flags to Largest Cities | 0 | - | 4.54 | 51,525 |
| Most Populous Second Cities in the U.S. | 0 | - | 4.30 | 40,946 |
| Biggest World Cities A-Z | 0 | - | 4.63 | 223,405 |
| Biggest Cities Starting With B | 0 | - | 4.34 | 162,963 |
| Biggest Cities Starting With C | 0 | - | 4.11 | 105,428 |
| Biggest Cities Starting With K | 0 | - | 4.31 | 87,209 |
| Biggest Cities Starting With S | 0 | - | 4.40 | 126,773 |
| Biggest Cities Starting With T | 0 | - | 4.29 | 128,441 |
| Most Populous Countries in 1900 | 0 | - | 4.91 | 173,920 |
| Biggest Cities in the Sun Belt on a Map | 0 | - | 4.68 | 23,730 |
| Boundary Waters | 0 | - | 4.92 | 88,581 |
| Countries Along the Afro-Eurasia Coast | 0 | - | 4.86 | 35,261 |
| The Same Suffixes - Geography | 0 | - | 4.98 | 96,284 |
| 100 Geography Questions of Varying Difficulty | 0 | - | 4.93 | 62,753 |
| "Second Best" Geography Edition #2 | 0 | - | 4.88 | 60,624 |
| Biggest Countries by Population - Shape Quiz | 0 | - | 4.91 | 57,591 |
| Biggest Cities Once in the Roman Empire | 0 | - | 4.81 | 75,748 |
| Top 15 Most Populous Countries Ending in "IA" | 0 | - | 4.77 | 115,852 |
| Biggest European Cities by Letter | 0 | - | 4.55 | 126,779 |
| Biggest Cities in the Commonwealth of Nations | 0 | - | 4.56 | 65,513 |
| Largest World Cities With Four Letters | 0 | - | 4.39 | 64,140 |
| Biggest Cities in Germany - Extreme | 0 | - | 4.78 | 47,028 |
| U.S. Cities With Population > 1 Million | 0 | - | 4.43 | 90,580 |
| U.S. States by Second Most Populous City | 0 | - | 4.42 | 44,057 |
| Biggest "Saint" Cities - United States | 0 | - | 4.46 | 36,892 |
| Biggest Cities with a Tropical Climate | 0 | - | 4.38 | 32,057 |
| Fastest Shrinking U.S. Cities | 0 | - | 4.44 | 40,448 |
| Most Populous U.S. Cities as a Percent of Their State | 0 | - | 4.78 | 55,252 |
| Cities in European Economic Areas on a Map | 0 | - | 4.70 | 17,814 |
| Biggest Cities in Australia on a Map | 0 | - | 4.62 | 38,019 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,596,708 |
| Landlocked Countries | 0 | - | 4.99 | 422,146 |
| Countries Losing the Most Population by 2070 | 0 | - | 4.40 | 84,593 |
| Jewish Cities Quiz | 0 | - | 4.34 | 61,872 |
| 25 Biggest Cities of the Soviet Union | 0 | - | 4.94 | 84,644 |
| 100 Biggest US Cities in 1900 | 0 | - | 4.46 | 73,192 |
| Biggest U.S. Cities Within 200 Kilometers | 0 | - | 4.41 | 48,914 |
| Biggest U.S. Cities Within 100 Kilometers | 0 | - | 4.42 | 51,626 |
| 100 Biggest Cities in Spain on a Map | 0 | - | 4.59 | 44,277 |
| Cities in Squares on a Map - North America | 0 | - | 4.30 | 21,494 |
| Largest Nordic Cities on a Map | 0 | - | 4.77 | 37,204 |
| Cities on Interstate 90 on a Map | 0 | - | 4.45 | 32,258 |
| Biggest Urban Areas in the UK | 0 | - | 4.43 | 176,446 |
| Biggest Cities in Japan | 0 | - | 4.68 | 83,232 |
| Biggest Cities in Russia | 0 | - | 4.49 | 82,532 |
| Biggest Cities in France | 0 | - | 4.70 | 224,421 |
| Biggest Cities in Spain | 0 | - | 4.63 | 171,472 |
| Biggest Cities in The Netherlands | 0 | - | 4.50 | 56,087 |
| Biggest Cities in Poland | 0 | - | 4.62 | 54,022 |
| Biggest Cities in the UK | 0 | - | 4.48 | 105,441 |
| Biggest Cities in China | 0 | - | 4.53 | 159,065 |
| Biggest Cities in Canada | 0 | - | 4.54 | 133,074 |
| Biggest Cities in Switzerland | 0 | - | 4.52 | 47,305 |
| Biggest Cities in India | 0 | - | 4.64 | 67,852 |
