| Biggest Cities in the World | 0 | - | 4.92 | 790,481 |
| Capitals of the Most Populated Countries | 0 | - | 4.96 | 127,124 |
| Biggest City by Time Zone | 0 | - | 4.87 | 66,659 |
| Biggest City in Every Country | 0 | - | 4.98 | 98,696 |
| Five Biggest World Cities by Letter #2 | 0 | - | 4.83 | 68,539 |
| Five Biggest World Cities by Letter #1 | 0 | - | 4.95 | 73,120 |
| Five Most Populated Cities by Continent | 0 | - | 4.93 | 221,957 |
| Biggest Cities in the World - Extreme | 0 | - | 4.98 | 108,873 |
| Biggest Cities That Aren't World Capitals | 0 | - | 4.96 | 130,065 |
| Biggest Cities with Exceptions | 0 | - | 4.90 | 78,499 |
| Biggest Cities in the Southern Hemisphere | 0 | - | 4.87 | 83,536 |
| 100 Biggest Cities on a World Map | 0 | - | 4.99 | 413,659 |
| Ten Biggest Cities by Hemisphere | 0 | - | 4.96 | 78,590 |
| Biggest Cities in Deserts | 0 | - | 4.97 | 53,061 |
| Most Populous Cities as a Percent of Their Continent | 0 | - | 4.91 | 69,173 |
| Ten Southernmost Megacities | 0 | - | 4.85 | 56,756 |
| 100 Biggest Cities in the World with Exceptions | 0 | - | 4.98 | 66,694 |
| Biggest Cities in 4 Random Countries on a Map | 0 | - | 4.99 | 128,537 |
| Biggest Cities in the United States | 0 | - | 4.93 | 966,748 |
| Biggest Metro Areas in the USA | 0 | - | 4.98 | 363,808 |
| Biggest Spanish-Speaking Cities | 0 | - | 4.91 | 126,491 |
| Biggest Cities by Language | 0 | - | 4.96 | 230,862 |
| Largest City by Island | 0 | - | 4.87 | 71,052 |
| Biggest Cities in Europe in 1700 | 0 | - | 4.92 | 70,395 |
| Most Populous World Capitals | 0 | - | 4.94 | 174,556 |
| Biggest European Cities by Century | 0 | - | 4.98 | 143,643 |
| Megacities on a World Map | 0 | - | 4.98 | 250,987 |
| All 1M Cities by Proximity | 0 | - | 5.00 | 573,313 |
| 2,000 Biggest World Cities Furthest from a Larger City | 0 | - | 4.98 | 66,803 |
| All 3M Cities on the World Map | 0 | - | 4.95 | 73,875 |
| Every 1,000,000+ City on a Map | 0 | - | 4.99 | 112,780 |
| Biggest City in Each U.S. State | 0 | - | 4.85 | 167,158 |
| Countries With More Than 100 Million People | 0 | - | 4.99 | 164,635 |
| Five Most Populated Countries by Hemisphere | 0 | - | 4.96 | 123,004 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 324,008 |
| 100 Biggest Cities in Europe with a Map | 0 | - | 4.97 | 342,074 |
| Five Most Populated Countries on a Multicolored World Map | 0 | - | 4.98 | 73,147 |
| Biggest US Cities by Decade | 0 | - | 4.95 | 167,049 |
| Biggest Cities in Asia | 0 | - | 4.95 | 115,355 |
| Biggest Cities in Asia - Extreme | 0 | - | 4.92 | 49,571 |
| Megacities on an Empty Map | 0 | - | 4.96 | 102,518 |
| African Cities in the Top 200 Worldwide | 0 | - | 4.95 | 50,301 |
| Five Biggest Cities by Country - Extreme | 0 | - | 4.96 | 40,780 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 171,250 |
| Countries with Megacities | 0 | - | 4.99 | 246,956 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 197,141 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 111,986 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 135,557 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 79,880 |
| 15 Largest Cities in Europe With a Map | 0 | - | 4.98 | 222,491 |
| 15 Largest Cities in Asia With a Map | 0 | - | 4.98 | 135,601 |
| 250 Biggest Cities in Europe With a Map | 0 | - | 4.91 | 113,805 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,435,153 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 377,662 |
| Second Biggest Cities by Country | 0 | - | 4.43 | 58,918 |
| Biggest Two-Word U.S. Cities | 0 | - | 4.50 | 101,905 |
| Biggest Cities by Trait #1 | 0 | - | 4.50 | 55,708 |
| Biggest City by Region | 0 | - | 4.50 | 35,997 |
| Most Populous 2nd Cities | 0 | - | 4.78 | 56,904 |
| Five Biggest Cities by Country | 0 | - | 4.70 | 165,674 |
| Biggest Cities in the U.S. - Extreme | 0 | - | 4.96 | 158,292 |
| 15 Largest Cities in North America With a Map | 0 | - | 4.98 | 46,458 |
| 15 Largest Cities in the Middle East With a Map | 0 | - | 4.92 | 117,303 |
| Northernmost Major City by Country | 0 | - | 4.56 | 33,019 |
| Largest World Capitals with Exceptions | 0 | - | 4.63 | 52,222 |
| Two Largest Cities by First Two Letters | 0 | - | 4.53 | 82,922 |
| Biggest Cities in Each U.S. State - Extreme | 0 | - | 4.93 | 78,741 |
| 10 Biggest Cities by U.S. State | 0 | - | 4.95 | 40,799 |
| 500 Biggest U.S. Urban Areas | 0 | - | 4.90 | 115,511 |
| 100 Biggest Cities in North America on a Map | 0 | - | 4.84 | 61,542 |
| Ten Northernmost Megacities | 0 | - | 4.50 | 49,260 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.95 | 85,846 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 265,943 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 120,891 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 111,499 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 92,610 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 58,277 |
| Biggest Cities in Europe | 0 | - | 4.70 | 542,201 |
| Largest World Cities With Four Letters | 0 | - | 4.36 | 50,675 |
| Biggest English-Speaking Cities | 0 | - | 4.45 | 151,397 |
| Biggest Cities in History | 0 | - | 4.52 | 89,133 |
| Top 10 World Cities Through History | 0 | - | 4.43 | 72,122 |
| Biggest Cities once in the Spanish Empire | 0 | - | 4.87 | 55,652 |
| 15 Largest Cities in South America With a Map | 0 | - | 4.94 | 124,265 |
| Biggest World Cities within 1,000 Km | 0 | - | 4.53 | 43,188 |
| Biggest Cities in France - Extreme | 0 | - | 4.87 | 55,833 |
| Biggest World Cities in 1850 | 0 | - | 4.62 | 68,199 |
| Biggest Cities in the Blue Banana | 0 | - | 4.56 | 36,003 |
| Biggest Cities in Germany | 0 | - | 4.95 | 291,301 |
| Biggest Cities Starting With A | 0 | - | 4.62 | 123,514 |
| Biggest Cities Starting With D | 0 | - | 4.51 | 115,972 |
| Biggest Cities Starting With H | 0 | - | 4.54 | 108,604 |
| Biggest Cities Starting With L | 0 | - | 4.44 | 121,915 |
| Biggest Cities Starting With M | 0 | - | 4.48 | 142,188 |
| Biggest Cities Starting With P | 0 | - | 4.46 | 125,997 |
| Countries of Europe by Population | 0 | - | 4.98 | 178,103 |
| Most Populous Countries by Year | 0 | - | 4.83 | 109,243 |
| Most Populous Country by First Two Letters | 0 | - | 4.70 | 70,656 |
| Demographics Multiple Choice | 0 | - | 4.69 | 42,090 |
| Most Populated Countries Bordering the Pacific Ocean | 0 | - | 4.96 | 95,152 |
| Most Populous Countries Bordering Each Other | 0 | - | 4.97 | 129,347 |
| Countries with the Most People Bordering Them | 0 | - | 4.98 | 106,942 |
| Populous Countries Bordering Smaller Countries | 0 | - | 4.97 | 112,413 |
| Densest Countries Bordering Each Other | 0 | - | 4.93 | 89,604 |
| Countries with a Population Under 1 Million by Clue | 0 | - | 4.99 | 92,304 |
| Fastest Growing U.S. Cities | 0 | - | 4.34 | 72,863 |
| Biggest Coastal City by Country | 0 | - | 4.61 | 27,978 |
| Biggest City by Region #2 | 0 | - | 4.43 | 24,667 |
| Biggest Cities by Latitude Range | 0 | - | 4.78 | 27,464 |
| Biggest Cities by Trait #2 | 0 | - | 4.46 | 20,221 |
| 100 Biggest Cities in Italy on a Map | 0 | - | 4.88 | 94,321 |
| Biggest Cities in Sweden | 0 | - | 4.85 | 40,946 |
| 100 Biggest Cities in Germany on a Map | 0 | - | 4.91 | 97,037 |
| All Cities in India with Population of 1 Million | 0 | - | 4.83 | 47,068 |
| Every 100k+ City in the United States on a Map | 0 | - | 4.97 | 112,512 |
| Most Populous Countries in 2050 | 0 | - | 4.91 | 221,485 |
| First Countries to Reach 5 Million People | 0 | - | 4.92 | 134,305 |
| Most Populous Modern-Day Countries in 1000 AD | 0 | - | 4.87 | 75,284 |
| Most Populous Modern-Day Countries in 1 AD | 0 | - | 4.97 | 83,616 |
| Most Populous Modern-Day Countries in 1800 AD | 0 | - | 4.93 | 66,576 |
| Most Populous Modern-Day Countries in 1500 AD | 0 | - | 4.93 | 72,818 |
| Most Populous Modern-Day Countries by Century | 0 | - | 4.98 | 96,227 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,319,892 |
| Countries with the Highest Population Density | 0 | - | 4.95 | 164,127 |
| Countries with the Lowest Population Density | 0 | - | 4.98 | 169,116 |
| Biggest Cities in Europe - Extreme | 0 | - | 4.74 | 73,116 |
| Biggest Mediterranean Cities | 0 | - | 4.61 | 91,032 |
| European Cities in the Top 200 Worldwide | 0 | - | 4.56 | 48,930 |
| Cities of China (With Some Help) | 0 | - | 4.91 | 31,287 |
| Most Populous Islands | 0 | - | 4.79 | 121,997 |
| Islands by Largest City #1 | 0 | - | 4.47 | 94,203 |
| Islands by Largest City #2 | 0 | - | 4.74 | 35,408 |
| Top 10 Most Populous European Countries | 0 | - | 4.98 | 230,987 |
| Top 10 Most Populous Asian Countries | 0 | - | 4.96 | 182,012 |
| Top 10 Most Populous African Countries | 0 | - | 4.99 | 191,870 |
| Top 10 Most Densely-Populated Countries in Asia | 0 | - | 4.92 | 102,997 |
| Countries by Population Decrease | 0 | - | 4.45 | 49,613 |
| Top 10 Asian Countries by Population Increase | 0 | - | 4.93 | 107,831 |
| Flags of Countries With More Than 100 Million People | 0 | - | 4.97 | 158,409 |
| Countries Gaining the Most Population by 2070 | 0 | - | 4.63 | 63,850 |
| Least Dense Countries Bordering Each Other | 0 | - | 4.85 | 22,939 |
| Biggest Cities with a Muslim Majority | 0 | - | 4.69 | 107,318 |
| Biggest Cities in Latin America | 0 | - | 4.48 | 64,478 |
| Biggest English Cities by Century | 0 | - | 4.90 | 105,607 |
| Biggest Cities Near a Border | 0 | - | 4.21 | 31,750 |
| Flags to Largest Cities | 0 | - | 4.55 | 50,790 |
| Most Populous Second Cities in the U.S. | 0 | - | 4.30 | 40,843 |
| Biggest World Cities A-Z | 0 | - | 4.63 | 221,383 |
| Biggest Cities Starting With B | 0 | - | 4.34 | 161,787 |
| Biggest Cities Starting With C | 0 | - | 4.11 | 104,601 |
| Biggest Cities Starting With K | 0 | - | 4.31 | 86,632 |
| Biggest Cities Starting With S | 0 | - | 4.40 | 125,781 |
| Biggest Cities Starting With T | 0 | - | 4.29 | 127,449 |
| Most Populous Countries in 1900 | 0 | - | 4.91 | 172,600 |
| World City Nicknames Quiz | 0 | - | 4.19 | 35,460 |
| Asian Countries with the Shortest Names | 0 | - | 4.97 | 134,369 |
| Biggest Cities in the Sun Belt on a Map | 0 | - | 4.68 | 23,393 |
| Boundary Waters | 0 | - | 4.92 | 88,046 |
| Countries Along the Afro-Eurasia Coast | 0 | - | 4.85 | 34,818 |
| The Same Suffixes - Geography | 0 | - | 4.98 | 95,292 |
| 100 Geography Questions of Varying Difficulty | 0 | - | 4.93 | 61,307 |
| "Second Best" Geography Edition #2 | 0 | - | 4.87 | 59,845 |
| Biggest Countries by Population - Shape Quiz | 0 | - | 4.91 | 56,958 |
| Name a Valid European Capital | 0 | - | 4.95 | 150,866 |
| Countries that Produce the Most Beer | 0 | - | 4.85 | 129,659 |
| 20 Random Country Flags | 0 | - | 4.99 | 604,498 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 256,832 |
| Name a Valid Asian Country | 0 | - | 4.98 | 120,063 |
| Name a Valid African Country | 0 | - | 4.98 | 152,950 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 113,263 |
| Top 15 Most Populous Countries Ending in "IA" | 0 | - | 4.74 | 101,927 |
| Biggest European Cities by Letter | 0 | - | 4.55 | 126,234 |
| Biggest Cities in the Commonwealth of Nations | 0 | - | 4.61 | 65,311 |
| Biggest Cities in Germany - Extreme | 0 | - | 4.78 | 46,856 |
| U.S. Cities With Population > 1 Million | 0 | - | 4.47 | 84,257 |
| U.S. States by Second Most Populous City | 0 | - | 4.42 | 43,707 |
| Biggest "Saint" Cities - United States | 0 | - | 4.46 | 36,618 |
| Biggest Cities with a Tropical Climate | 0 | - | 4.38 | 31,882 |
| Fastest Shrinking U.S. Cities | 0 | - | 4.44 | 40,171 |
| Cities in European Economic Areas on a Map | 0 | - | 4.67 | 16,977 |
| Biggest Cities in Australia on a Map | 0 | - | 4.61 | 37,554 |
| Countries of the World Quiz | 0 | - | 5.00 | 46,923,530 |
| Landlocked Countries | 0 | - | 4.99 | 413,659 |
| Countries as U.S. First Names | 0 | - | 4.31 | 77,346 |
| U.S. Baby Boy Names by Decade | 0 | - | 4.55 | 486,499 |
| U.S. Baby Girl Names by Decade | 0 | - | 4.42 | 709,608 |
| Countries Losing the Most Population by 2070 | 0 | - | 4.40 | 84,137 |
| Jewish Cities Quiz | 0 | - | 4.34 | 61,651 |
| 25 Biggest Cities of the Soviet Union | 0 | - | 4.95 | 84,007 |
| 100 Biggest US Cities in 1900 | 0 | - | 4.45 | 72,759 |
| Biggest U.S. Cities Within 200 Kilometers | 0 | - | 4.41 | 48,484 |
| Biggest U.S. Cities Within 100 Kilometers | 0 | - | 4.42 | 51,253 |
| 100 Biggest Cities in Spain on a Map | 0 | - | 4.59 | 43,450 |
| Cities in Squares on a Map - North America | 0 | - | 4.30 | 21,333 |
| Largest Nordic Cities on a Map | 0 | - | 4.77 | 36,784 |
| Cities on Interstate 90 on a Map | 0 | - | 4.45 | 31,928 |
| Biggest Urban Areas in the UK | 0 | - | 4.42 | 175,799 |
| Biggest Cities in Japan | 0 | - | 4.68 | 82,527 |
| Biggest Cities in Russia | 0 | - | 4.49 | 82,026 |
| Biggest Cities in France | 0 | - | 4.69 | 222,117 |
