| Biggest Cities in the World | 0 | - | 4.91 | 792,274 |
| Capitals of the Most Populated Countries | 0 | - | 4.96 | 127,273 |
| Biggest City by Time Zone | 0 | - | 4.88 | 66,949 |
| Biggest City in Every Country | 0 | - | 4.98 | 99,085 |
| Five Most Populated Cities by Continent | 0 | - | 4.93 | 222,663 |
| Biggest Cities in the World - Extreme | 0 | - | 4.98 | 109,178 |
| Biggest Cities That Aren't World Capitals | 0 | - | 4.96 | 130,987 |
| Biggest Cities with Exceptions | 0 | - | 4.90 | 78,807 |
| Biggest Cities in the Southern Hemisphere | 0 | - | 4.87 | 83,748 |
| 100 Biggest Cities on a World Map | 0 | - | 4.99 | 414,538 |
| Ten Biggest Cities by Hemisphere | 0 | - | 4.96 | 78,849 |
| Biggest Cities in Deserts | 0 | - | 4.97 | 53,260 |
| Most Populous Cities as a Percent of Their Continent | 0 | - | 4.91 | 69,347 |
| Ten Southernmost Megacities | 0 | - | 4.85 | 56,880 |
| 100 Biggest Cities in the World with Exceptions | 0 | - | 4.97 | 66,903 |
| Biggest Cities in 4 Random Countries on a Map | 0 | - | 4.99 | 128,859 |
| Biggest Cities in the United States | 0 | - | 4.93 | 969,162 |
| Biggest Metro Areas in the USA | 0 | - | 4.98 | 364,315 |
| Countries of Europe by Population | 0 | - | 4.98 | 178,633 |
| Biggest Spanish-Speaking Cities | 0 | - | 4.91 | 127,018 |
| Biggest Cities by Language | 0 | - | 4.96 | 243,732 |
| Largest City by Island | 0 | - | 4.87 | 71,217 |
| Biggest Cities in Europe in 1700 | 0 | - | 4.92 | 70,504 |
| Most Populous World Capitals | 0 | - | 4.94 | 174,765 |
| Biggest European Cities by Century | 0 | - | 4.99 | 144,667 |
| Megacities on a World Map | 0 | - | 4.98 | 251,653 |
| All 1M Cities by Proximity | 0 | - | 5.00 | 574,359 |
| 2,000 Biggest World Cities Furthest from a Larger City | 0 | - | 4.98 | 66,930 |
| All 3M Cities on the World Map | 0 | - | 4.95 | 74,100 |
| Every 1,000,000+ City on a Map | 0 | - | 4.99 | 113,168 |
| Biggest City in Each U.S. State | 0 | - | 4.84 | 167,412 |
| Countries With More Than 100 Million People | 0 | - | 4.99 | 165,051 |
| Five Most Populated Countries by Hemisphere | 0 | - | 4.96 | 123,291 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 325,575 |
| 100 Biggest Cities in Europe with a Map | 0 | - | 4.97 | 342,803 |
| Top 10 Most Populous European Countries | 0 | - | 4.97 | 231,349 |
| Top 10 Most Populous Asian Countries | 0 | - | 4.96 | 182,290 |
| Top 10 Most Populous African Countries | 0 | - | 4.99 | 192,140 |
| Top 10 Most Densely-Populated Countries in Asia | 0 | - | 4.92 | 103,144 |
| Top 10 Asian Countries by Population Increase | 0 | - | 4.93 | 107,913 |
| Biggest US Cities by Decade | 0 | - | 4.95 | 167,232 |
| Biggest Cities in Asia | 0 | - | 4.95 | 115,826 |
| Biggest Cities in Asia - Extreme | 0 | - | 4.92 | 49,651 |
| Megacities on an Empty Map | 0 | - | 4.97 | 112,895 |
| African Cities in the Top 200 Worldwide | 0 | - | 4.95 | 50,444 |
| Five Biggest Cities by Country - Extreme | 0 | - | 4.96 | 40,938 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 171,822 |
| Countries with Megacities | 0 | - | 4.99 | 248,019 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 197,694 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 112,300 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 136,076 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 80,251 |
| Five Biggest World Cities by Letter #2 | 0 | - | 4.83 | 68,619 |
| Five Biggest World Cities by Letter #1 | 0 | - | 4.95 | 73,204 |
| 15 Largest Cities in Europe With a Map | 0 | - | 4.98 | 222,871 |
| 15 Largest Cities in Asia With a Map | 0 | - | 4.98 | 135,854 |
| 250 Biggest Cities in Europe With a Map | 0 | - | 4.91 | 114,111 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,437,467 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 378,250 |
| Second Biggest Cities by Country | 0 | - | 4.43 | 59,061 |
| Biggest Two-Word U.S. Cities | 0 | - | 4.50 | 101,945 |
| Biggest Cities by Trait #1 | 0 | - | 4.50 | 55,784 |
| Biggest City by Region | 0 | - | 4.50 | 36,032 |
| Most Populous 2nd Cities | 0 | - | 4.78 | 56,953 |
| Biggest Cities in the U.S. - Extreme | 0 | - | 4.96 | 158,500 |
| 15 Largest Cities in North America With a Map | 0 | - | 4.98 | 46,608 |
| 15 Largest Cities in the Middle East With a Map | 0 | - | 4.92 | 117,552 |
| Northernmost Major City by Country | 0 | - | 4.56 | 33,062 |
| Largest World Capitals with Exceptions | 0 | - | 4.63 | 52,250 |
| Two Largest Cities by First Two Letters | 0 | - | 4.53 | 82,989 |
| Biggest Cities in Each U.S. State - Extreme | 0 | - | 4.93 | 78,871 |
| 10 Biggest Cities by U.S. State | 0 | - | 4.95 | 41,007 |
| 500 Biggest U.S. Urban Areas | 0 | - | 4.90 | 115,776 |
| 100 Biggest Cities in North America on a Map | 0 | - | 4.84 | 61,678 |
| Ten Northernmost Megacities | 0 | - | 4.50 | 49,287 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.95 | 86,120 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 266,433 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 121,121 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 111,606 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 92,900 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 58,481 |
| Biggest Cities in Europe | 0 | - | 4.70 | 542,938 |
| Biggest English-Speaking Cities | 0 | - | 4.45 | 151,597 |
| Biggest Cities in History | 0 | - | 4.52 | 89,247 |
| Top 10 World Cities Through History | 0 | - | 4.43 | 72,177 |
| Biggest Cities once in the Spanish Empire | 0 | - | 4.87 | 55,726 |
| 15 Largest Cities in South America With a Map | 0 | - | 4.95 | 124,664 |
| Biggest World Cities within 1,000 Km | 0 | - | 4.53 | 43,239 |
| Biggest Cities in France - Extreme | 0 | - | 4.87 | 56,014 |
| Biggest World Cities in 1850 | 0 | - | 4.61 | 68,248 |
| Biggest Cities in the Blue Banana | 0 | - | 4.56 | 36,109 |
| Biggest Cities in Germany | 0 | - | 4.95 | 291,830 |
| Biggest Cities Starting With A | 0 | - | 4.62 | 123,702 |
| Biggest Cities Starting With D | 0 | - | 4.51 | 116,150 |
| Biggest Cities Starting With H | 0 | - | 4.54 | 108,792 |
| Biggest Cities Starting With L | 0 | - | 4.44 | 122,113 |
| Biggest Cities Starting With M | 0 | - | 4.48 | 142,653 |
| Biggest Cities Starting With P | 0 | - | 4.46 | 126,172 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 145,622 |
| Most Populous Countries by Year | 0 | - | 4.83 | 109,526 |
| Most Populous Country by First Two Letters | 0 | - | 4.70 | 70,698 |
| Demographics Multiple Choice | 0 | - | 4.69 | 42,129 |
| Most Populated Countries Bordering the Pacific Ocean | 0 | - | 4.97 | 95,247 |
| Most Populous Countries Bordering Each Other | 0 | - | 4.97 | 129,612 |
| Countries with the Most People Bordering Them | 0 | - | 4.98 | 107,160 |
| Populous Countries Bordering Smaller Countries | 0 | - | 4.97 | 112,593 |
| Densest Countries Bordering Each Other | 0 | - | 4.93 | 89,760 |
| Countries with a Population Under 1 Million by Clue | 0 | - | 4.99 | 92,416 |
| Fastest Growing U.S. Cities | 0 | - | 4.34 | 72,891 |
| Biggest Coastal City by Country | 0 | - | 4.61 | 27,989 |
| Biggest City by Region #2 | 0 | - | 4.43 | 24,697 |
| Biggest Cities by Latitude Range | 0 | - | 4.78 | 27,488 |
| Biggest Cities by Trait #2 | 0 | - | 4.46 | 20,308 |
| 100 Biggest Cities in Italy on a Map | 0 | - | 4.88 | 94,757 |
| All Cities in China with Population of 1 Million | 0 | - | 4.81 | 45,420 |
| Biggest Cities in Sweden | 0 | - | 4.85 | 41,003 |
| 100 Biggest Cities in Germany on a Map | 0 | - | 4.91 | 97,415 |
| All Cities in India with Population of 1 Million | 0 | - | 4.83 | 47,169 |
| Every 100k+ City in the United States on a Map | 0 | - | 4.97 | 112,823 |
| Most Populous Countries in 2050 | 0 | - | 4.91 | 221,715 |
| First Countries to Reach 5 Million People | 0 | - | 4.92 | 134,501 |
| Most Populous Modern-Day Countries in 1000 AD | 0 | - | 4.87 | 75,415 |
| Most Populous Modern-Day Countries in 1 AD | 0 | - | 4.97 | 83,772 |
| Most Populous Modern-Day Countries in 1800 AD | 0 | - | 4.93 | 66,678 |
| Most Populous Modern-Day Countries in 1500 AD | 0 | - | 4.93 | 72,931 |
| Most Populous Modern-Day Countries by Century | 0 | - | 4.98 | 96,381 |
| Countries with the Highest Population Density | 0 | - | 4.95 | 164,319 |
| Countries with the Lowest Population Density | 0 | - | 4.98 | 169,350 |
| Five Top Olympic Medal-Winning Countries by Continent | 0 | - | 4.96 | 142,986 |
| Countries with Most Nobel Prizes by Continent | 0 | - | 4.93 | 59,806 |
| Five Coldest Countries by Continent | 0 | - | 4.97 | 76,312 |
| Biggest Cities in Europe - Extreme | 0 | - | 4.74 | 73,173 |
| Biggest Mediterranean Cities | 0 | - | 4.61 | 91,100 |
| European Cities in the Top 200 Worldwide | 0 | - | 4.56 | 49,115 |
| Cities of China (With Some Help) | 0 | - | 4.90 | 31,331 |
| Most Populous Islands | 0 | - | 4.79 | 122,083 |
| Islands by Largest City #1 | 0 | - | 4.47 | 94,221 |
| Islands by Largest City #2 | 0 | - | 4.74 | 35,430 |
| Countries by Population Decrease | 0 | - | 4.46 | 49,660 |
| Flags of Countries With More Than 100 Million People | 0 | - | 4.97 | 158,604 |
| Countries Gaining the Most Population by 2070 | 0 | - | 4.63 | 63,931 |
| Five Most Populated Countries on a Multicolored World Map | 0 | - | 4.98 | 73,284 |
| Least Dense Countries Bordering Each Other | 0 | - | 4.84 | 23,044 |
| Biggest Cities with a Muslim Majority | 0 | - | 4.69 | 107,409 |
| Biggest Cities in Latin America | 0 | - | 4.48 | 64,527 |
| Biggest English Cities by Century | 0 | - | 4.90 | 105,681 |
| Five Biggest Cities by Country | 0 | - | 4.70 | 165,877 |
| Biggest Cities Near a Border | 0 | - | 4.22 | 31,797 |
| Flags to Largest Cities | 0 | - | 4.54 | 50,918 |
| Most Populous Second Cities in the U.S. | 0 | - | 4.30 | 40,865 |
| Biggest World Cities A-Z | 0 | - | 4.62 | 221,950 |
| Biggest Cities Starting With B | 0 | - | 4.34 | 162,020 |
| Biggest Cities Starting With C | 0 | - | 4.11 | 104,885 |
| Biggest Cities Starting With K | 0 | - | 4.31 | 86,752 |
| Biggest Cities Starting With S | 0 | - | 4.40 | 125,958 |
| Biggest Cities Starting With T | 0 | - | 4.29 | 127,625 |
| Most Populous Countries in 1900 | 0 | - | 4.91 | 172,760 |
| Five Countries by a Single Word by Continent | 0 | - | 4.91 | 77,446 |
| Five Countries with Most Christians by Continent | 0 | - | 4.99 | 110,831 |
| Five Biggest Economies by Continent | 0 | - | 4.98 | 194,184 |
| Biggest Cities in the Sun Belt on a Map | 0 | - | 4.68 | 23,446 |
| Boundary Waters | 0 | - | 4.92 | 88,123 |
| Countries Along the Afro-Eurasia Coast | 0 | - | 4.85 | 34,891 |
| The Same Suffixes - Geography | 0 | - | 4.98 | 95,468 |
| 100 Geography Questions of Varying Difficulty | 0 | - | 4.93 | 61,549 |
| "Second Best" Geography Edition #2 | 0 | - | 4.87 | 59,978 |
| Biggest Countries by Population - Shape Quiz | 0 | - | 4.91 | 57,060 |
| Total United States Immigration by Country | 0 | - | 4.91 | 110,821 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 241,546 |
| Five Countries with the Longest Coastline by Continent | 0 | - | 4.97 | 114,873 |
| Top 15 Most Populous Countries Ending in "IA" | 0 | - | 4.77 | 114,701 |
| Biggest European Cities by Letter | 0 | - | 4.54 | 126,322 |
| Biggest Cities in the Commonwealth of Nations | 0 | - | 4.56 | 65,345 |
| Largest World Cities With Four Letters | 0 | - | 4.36 | 50,842 |
| Biggest Cities in Germany - Extreme | 0 | - | 4.78 | 46,884 |
| U.S. Cities With Population > 1 Million | 0 | - | 4.47 | 84,414 |
| U.S. States by Second Most Populous City | 0 | - | 4.42 | 43,761 |
| Biggest "Saint" Cities - United States | 0 | - | 4.46 | 36,668 |
| Biggest Cities with a Tropical Climate | 0 | - | 4.38 | 31,909 |
| Fastest Shrinking U.S. Cities | 0 | - | 4.44 | 40,213 |
| Cities in European Economic Areas on a Map | 0 | - | 4.69 | 17,129 |
| Biggest Cities in Australia on a Map | 0 | - | 4.61 | 37,624 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,031,969 |
| Landlocked Countries | 0 | - | 4.99 | 415,043 |
| Countries Losing the Most Population by 2070 | 0 | - | 4.40 | 84,220 |
| Jewish Cities Quiz | 0 | - | 4.34 | 61,695 |
| 25 Biggest Cities of the Soviet Union | 0 | - | 4.94 | 84,110 |
| 100 Biggest US Cities in 1900 | 0 | - | 4.45 | 72,823 |
| Biggest U.S. Cities Within 200 Kilometers | 0 | - | 4.41 | 48,552 |
| Biggest U.S. Cities Within 100 Kilometers | 0 | - | 4.42 | 51,310 |
| 100 Biggest Cities in Spain on a Map | 0 | - | 4.59 | 43,568 |
| Cities in Squares on a Map - North America | 0 | - | 4.30 | 21,353 |
| Largest Nordic Cities on a Map | 0 | - | 4.77 | 36,854 |
| Cities on Interstate 90 on a Map | 0 | - | 4.45 | 31,975 |
| Biggest Urban Areas in the UK | 0 | - | 4.42 | 175,929 |
| Biggest Cities in Japan | 0 | - | 4.68 | 82,644 |
| Biggest Cities in Russia | 0 | - | 4.49 | 82,098 |
| Biggest Cities in France | 0 | - | 4.69 | 222,748 |
| Biggest Cities in Spain | 0 | - | 4.63 | 170,148 |
| Biggest Cities in The Netherlands | 0 | - | 4.50 | 55,721 |
