| Biggest Cities in the World | 0 | - | 4.91 | 792,244 |
| Capitals of the Most Populated Countries | 0 | - | 4.96 | 127,269 |
| Biggest City by Time Zone | 0 | - | 4.88 | 66,946 |
| Biggest City in Every Country | 0 | - | 4.98 | 99,084 |
| Five Most Populated Cities by Continent | 0 | - | 4.93 | 222,657 |
| Biggest Cities in the World - Extreme | 0 | - | 4.98 | 109,174 |
| Biggest Cities That Aren't World Capitals | 0 | - | 4.96 | 130,977 |
| Biggest Cities with Exceptions | 0 | - | 4.90 | 78,807 |
| Biggest Cities in the Southern Hemisphere | 0 | - | 4.87 | 83,745 |
| 100 Biggest Cities on a World Map | 0 | - | 4.99 | 414,529 |
| Ten Biggest Cities by Hemisphere | 0 | - | 4.96 | 78,846 |
| Biggest Cities in Deserts | 0 | - | 4.97 | 53,259 |
| Most Populous Cities as a Percent of Their Continent | 0 | - | 4.91 | 69,342 |
| Ten Southernmost Megacities | 0 | - | 4.85 | 56,879 |
| 100 Biggest Cities in the World with Exceptions | 0 | - | 4.97 | 66,902 |
| Biggest Cities in 4 Random Countries on a Map | 0 | - | 4.99 | 128,858 |
| Biggest Cities in the United States | 0 | - | 4.93 | 969,124 |
| Biggest Metro Areas in the USA | 0 | - | 4.98 | 364,311 |
| Countries of Europe by Population | 0 | - | 4.98 | 178,624 |
| Biggest Spanish-Speaking Cities | 0 | - | 4.91 | 127,011 |
| Biggest Cities by Language | 0 | - | 4.96 | 243,669 |
| Largest City by Island | 0 | - | 4.87 | 71,215 |
| Biggest Cities in Europe in 1700 | 0 | - | 4.92 | 70,503 |
| Most Populous World Capitals | 0 | - | 4.94 | 174,762 |
| Biggest European Cities by Century | 0 | - | 4.99 | 144,656 |
| Megacities on a World Map | 0 | - | 4.98 | 251,635 |
| All 1M Cities by Proximity | 0 | - | 5.00 | 574,347 |
| 2,000 Biggest World Cities Furthest from a Larger City | 0 | - | 4.98 | 66,928 |
| All 3M Cities on the World Map | 0 | - | 4.95 | 74,095 |
| Every 1,000,000+ City on a Map | 0 | - | 4.99 | 113,161 |
| Biggest City in Each U.S. State | 0 | - | 4.84 | 167,406 |
| Countries With More Than 100 Million People | 0 | - | 4.99 | 165,046 |
| Five Most Populated Countries by Hemisphere | 0 | - | 4.96 | 123,280 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 325,559 |
| 100 Biggest Cities in Europe with a Map | 0 | - | 4.97 | 342,794 |
| Top 10 Most Populous European Countries | 0 | - | 4.97 | 231,342 |
| Top 10 Most Populous Asian Countries | 0 | - | 4.96 | 182,282 |
| Top 10 Most Populous African Countries | 0 | - | 4.99 | 192,134 |
| Top 10 Most Densely-Populated Countries in Asia | 0 | - | 4.92 | 103,144 |
| Top 10 Asian Countries by Population Increase | 0 | - | 4.93 | 107,912 |
| Biggest US Cities by Decade | 0 | - | 4.95 | 167,228 |
| Biggest Cities in Asia | 0 | - | 4.95 | 115,820 |
| Biggest Cities in Asia - Extreme | 0 | - | 4.92 | 49,650 |
| Megacities on an Empty Map | 0 | - | 4.97 | 112,713 |
| African Cities in the Top 200 Worldwide | 0 | - | 4.95 | 50,443 |
| Five Biggest Cities by Country - Extreme | 0 | - | 4.96 | 40,937 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 171,810 |
| Countries with Megacities | 0 | - | 4.99 | 248,004 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 197,686 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 112,298 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 136,067 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 80,248 |
| Five Biggest World Cities by Letter #2 | 0 | - | 4.83 | 68,617 |
| Five Biggest World Cities by Letter #1 | 0 | - | 4.95 | 73,202 |
| 15 Largest Cities in Europe With a Map | 0 | - | 4.98 | 222,862 |
| 15 Largest Cities in Asia With a Map | 0 | - | 4.98 | 135,852 |
| 250 Biggest Cities in Europe With a Map | 0 | - | 4.91 | 114,107 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,437,440 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 378,230 |
| Second Biggest Cities by Country | 0 | - | 4.43 | 59,060 |
| 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 | 56,951 |
| Biggest Cities in the U.S. - Extreme | 0 | - | 4.96 | 158,497 |
| 15 Largest Cities in North America With a Map | 0 | - | 4.98 | 46,603 |
| 15 Largest Cities in the Middle East With a Map | 0 | - | 4.92 | 117,547 |
| 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 | 82,987 |
| 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 | 115,774 |
| 100 Biggest Cities in North America on a Map | 0 | - | 4.84 | 61,674 |
| Ten Northernmost Megacities | 0 | - | 4.50 | 49,287 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.95 | 86,116 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 266,428 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 121,119 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 111,600 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 92,898 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 58,479 |
| Biggest Cities in Europe | 0 | - | 4.70 | 542,921 |
| Biggest English-Speaking Cities | 0 | - | 4.45 | 151,595 |
| Biggest Cities in History | 0 | - | 4.52 | 89,246 |
| Top 10 World Cities Through History | 0 | - | 4.43 | 72,176 |
| Biggest Cities once in the Spanish Empire | 0 | - | 4.87 | 55,725 |
| 15 Largest Cities in South America With a Map | 0 | - | 4.95 | 124,652 |
| Biggest World Cities within 1,000 Km | 0 | - | 4.53 | 43,239 |
| Biggest Cities in France - Extreme | 0 | - | 4.87 | 56,008 |
| Biggest World Cities in 1850 | 0 | - | 4.61 | 68,246 |
| Biggest Cities in the Blue Banana | 0 | - | 4.56 | 36,107 |
| Biggest Cities in Germany | 0 | - | 4.95 | 291,822 |
| Biggest Cities Starting With A | 0 | - | 4.62 | 123,700 |
| Biggest Cities Starting With D | 0 | - | 4.51 | 116,148 |
| Biggest Cities Starting With H | 0 | - | 4.54 | 108,788 |
| Biggest Cities Starting With L | 0 | - | 4.44 | 122,110 |
| Biggest Cities Starting With M | 0 | - | 4.48 | 142,650 |
| Biggest Cities Starting With P | 0 | - | 4.46 | 126,165 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 145,616 |
| Most Populous Countries by Year | 0 | - | 4.83 | 109,522 |
| Most Populous Country by First Two Letters | 0 | - | 4.70 | 70,696 |
| Demographics Multiple Choice | 0 | - | 4.69 | 42,129 |
| Most Populated Countries Bordering the Pacific Ocean | 0 | - | 4.97 | 95,246 |
| Most Populous Countries Bordering Each Other | 0 | - | 4.97 | 129,607 |
| Countries with the Most People Bordering Them | 0 | - | 4.98 | 107,157 |
| Populous Countries Bordering Smaller Countries | 0 | - | 4.97 | 112,582 |
| Densest Countries Bordering Each Other | 0 | - | 4.93 | 89,760 |
| Countries with a Population Under 1 Million by Clue | 0 | - | 4.99 | 92,404 |
| Fastest Growing U.S. Cities | 0 | - | 4.34 | 72,890 |
| 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 | 20,307 |
| 100 Biggest Cities in Italy on a Map | 0 | - | 4.88 | 94,753 |
| All Cities in China with Population of 1 Million | 0 | - | 4.81 | 45,420 |
| Biggest Cities in Sweden | 0 | - | 4.85 | 41,001 |
| 100 Biggest Cities in Germany on a Map | 0 | - | 4.91 | 97,408 |
| 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 | 112,822 |
| Most Populous Countries in 2050 | 0 | - | 4.91 | 221,709 |
| First Countries to Reach 5 Million People | 0 | - | 4.92 | 134,492 |
| Most Populous Modern-Day Countries in 1000 AD | 0 | - | 4.87 | 75,411 |
| Most Populous Modern-Day Countries in 1 AD | 0 | - | 4.97 | 83,769 |
| Most Populous Modern-Day Countries in 1800 AD | 0 | - | 4.93 | 66,677 |
| Most Populous Modern-Day Countries in 1500 AD | 0 | - | 4.93 | 72,927 |
| Most Populous Modern-Day Countries by Century | 0 | - | 4.98 | 96,379 |
| Countries with the Highest Population Density | 0 | - | 4.95 | 164,319 |
| Countries with the Lowest Population Density | 0 | - | 4.98 | 169,344 |
| Five Top Olympic Medal-Winning Countries by Continent | 0 | - | 4.96 | 142,977 |
| Countries with Most Nobel Prizes by Continent | 0 | - | 4.93 | 59,805 |
| Five Coldest Countries by Continent | 0 | - | 4.97 | 76,312 |
| Biggest Cities in Europe - Extreme | 0 | - | 4.74 | 73,172 |
| Biggest Mediterranean Cities | 0 | - | 4.61 | 91,100 |
| European Cities in the Top 200 Worldwide | 0 | - | 4.56 | 49,110 |
| Cities of China (With Some Help) | 0 | - | 4.90 | 31,330 |
| 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 | 35,429 |
| Countries by Population Decrease | 0 | - | 4.46 | 49,659 |
| Flags of Countries With More Than 100 Million People | 0 | - | 4.97 | 158,599 |
| Countries Gaining the Most Population by 2070 | 0 | - | 4.63 | 63,930 |
| Five Most Populated Countries on a Multicolored World Map | 0 | - | 4.98 | 73,282 |
| Least Dense Countries Bordering Each Other | 0 | - | 4.84 | 23,041 |
| Biggest Cities with a Muslim Majority | 0 | - | 4.69 | 107,407 |
| Biggest Cities in Latin America | 0 | - | 4.48 | 64,527 |
| Biggest English Cities by Century | 0 | - | 4.90 | 105,680 |
| Five Biggest Cities by Country | 0 | - | 4.70 | 165,866 |
| 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 | 221,945 |
| Biggest Cities Starting With B | 0 | - | 4.34 | 162,017 |
| Biggest Cities Starting With C | 0 | - | 4.11 | 104,883 |
| Biggest Cities Starting With K | 0 | - | 4.31 | 86,749 |
| Biggest Cities Starting With S | 0 | - | 4.40 | 125,952 |
| Biggest Cities Starting With T | 0 | - | 4.29 | 127,623 |
| Most Populous Countries in 1900 | 0 | - | 4.91 | 172,760 |
| Five Countries by a Single Word by Continent | 0 | - | 4.91 | 77,441 |
| Five Countries with Most Christians by Continent | 0 | - | 4.99 | 110,827 |
| Five Biggest Economies by Continent | 0 | - | 4.98 | 194,181 |
| 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 | 34,890 |
| The Same Suffixes - Geography | 0 | - | 4.98 | 95,465 |
| 100 Geography Questions of Varying Difficulty | 0 | - | 4.93 | 61,548 |
| "Second Best" Geography Edition #2 | 0 | - | 4.87 | 59,977 |
| Biggest Countries by Population - Shape Quiz | 0 | - | 4.91 | 57,057 |
| Total United States Immigration by Country | 0 | - | 4.91 | 110,818 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 241,531 |
| Five Countries with the Longest Coastline by Continent | 0 | - | 4.97 | 114,872 |
| Top 15 Most Populous Countries Ending in "IA" | 0 | - | 4.77 | 114,686 |
| Biggest European Cities by Letter | 0 | - | 4.54 | 126,321 |
| Biggest Cities in the Commonwealth of Nations | 0 | - | 4.56 | 65,345 |
| Largest World Cities With Four Letters | 0 | - | 4.36 | 50,838 |
| Biggest Cities in Germany - Extreme | 0 | - | 4.78 | 46,884 |
| U.S. Cities With Population > 1 Million | 0 | - | 4.47 | 84,413 |
| U.S. States by Second Most Populous City | 0 | - | 4.42 | 43,760 |
| 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 | 40,211 |
| 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 | 47,030,153 |
| Landlocked Countries | 0 | - | 4.99 | 415,013 |
| Countries Losing the Most Population by 2070 | 0 | - | 4.40 | 84,217 |
| Jewish Cities Quiz | 0 | - | 4.34 | 61,695 |
| 25 Biggest Cities of the Soviet Union | 0 | - | 4.94 | 84,105 |
| 100 Biggest US Cities in 1900 | 0 | - | 4.45 | 72,821 |
| Biggest U.S. Cities Within 200 Kilometers | 0 | - | 4.41 | 48,551 |
| Biggest U.S. Cities Within 100 Kilometers | 0 | - | 4.42 | 51,309 |
| 100 Biggest Cities in Spain on a Map | 0 | - | 4.59 | 43,568 |
| Cities in Squares on a Map - North America | 0 | - | 4.30 | 21,352 |
| Largest Nordic Cities on a Map | 0 | - | 4.77 | 36,852 |
| Cities on Interstate 90 on a Map | 0 | - | 4.45 | 31,974 |
| Biggest Urban Areas in the UK | 0 | - | 4.42 | 175,927 |
| 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 | 222,744 |
| Biggest Cities in Spain | 0 | - | 4.63 | 170,140 |
| Biggest Cities in The Netherlands | 0 | - | 4.50 | 55,720 |
