| Biggest Cities in the World | 0 | - | 4.90 | 697,098 |
| Biggest City by Time Zone | 0 | - | 4.84 | 55,399 |
| Biggest City in Every Country | 0 | - | 4.98 | 80,589 |
| Five Most Populated Cities by Continent | 0 | - | 4.95 | 172,674 |
| Biggest Cities in the World - Extreme | 0 | - | 4.98 | 93,451 |
| 10 Biggest Cities That Aren't World Capitals | 0 | - | 4.95 | 98,597 |
| Biggest Cities with Exceptions | 0 | - | 4.91 | 66,166 |
| Biggest Cities in the Southern Hemisphere | 0 | - | 4.84 | 72,754 |
| 100 Biggest Cities on a World Map | 0 | - | 4.99 | 376,008 |
| Ten Biggest Cities by Hemisphere | 0 | - | 4.95 | 66,367 |
| Biggest Cities in Deserts | 0 | - | 4.94 | 42,800 |
| Most Populous Cities as a Percent of Their Continent | 0 | - | 4.91 | 60,467 |
| Ten Southernmost Megacities | 0 | - | 4.81 | 46,773 |
| 100 Biggest Cities in the World with Exceptions | 0 | - | 4.97 | 56,187 |
| Biggest Cities in the United States | 0 | - | 4.93 | 843,799 |
| Biggest Metro Areas in the USA | 0 | - | 4.98 | 337,301 |
| Biggest Spanish-Speaking Cities | 0 | - | 4.87 | 109,779 |
| Biggest Cities by Language | 0 | - | 4.95 | 215,660 |
| Biggest Cities in Europe, 1700 A.D. | 0 | - | 4.95 | 65,198 |
| Most Populous World Capitals | 0 | - | 4.93 | 149,941 |
| Biggest European Cities by Century | 0 | - | 4.98 | 119,897 |
| Megacities on a World Map | 0 | - | 4.98 | 222,878 |
| All 1M Cities by Proximity | 0 | - | 5.00 | 519,862 |
| 2,000 Biggest World Cities Furthest from a Larger City | 0 | - | 4.98 | 60,520 |
| All 3M Cities on the World Map | 0 | - | 4.95 | 64,218 |
| Every 1,000,000+ City on a Map | 0 | - | 4.99 | 85,815 |
| Biggest City in Each U.S. State | 0 | - | 4.85 | 152,570 |
| Biggest US Cities by Decade | 0 | - | 4.95 | 155,976 |
| Biggest Cities in Asia | 0 | - | 4.94 | 97,263 |
| Biggest Cities in Asia - Extreme | 0 | - | 4.91 | 44,131 |
| Megacities on an Empty Map | 0 | - | 4.95 | 88,368 |
| African Cities in the Top 200 Worldwide | 0 | - | 4.93 | 42,613 |
| Biggest Cities Starting With A | 0 | - | 4.55 | 113,425 |
| Biggest Cities Starting With D | 0 | - | 4.49 | 107,660 |
| Biggest Cities Starting With H | 0 | - | 4.57 | 98,711 |
| Biggest Cities Starting With L | 0 | - | 4.44 | 111,598 |
| Biggest Cities Starting With M | 0 | - | 4.50 | 130,078 |
| Biggest Cities Starting With P | 0 | - | 4.47 | 115,742 |
| Five Biggest World Cities by Letter #2 | 0 | - | 4.83 | 64,224 |
| Five Biggest World Cities by Letter #1 | 0 | - | 4.94 | 68,356 |
| 15 Largest Cities in Europe With a Map | 0 | - | 4.97 | 202,151 |
| 15 Largest Cities in Asia With a Map | 0 | - | 4.97 | 121,910 |
| 100 Biggest Cities in Europe with a Map | 0 | - | 4.97 | 307,897 |
| 250 Biggest Cities in Europe With a Map | 0 | - | 4.89 | 99,276 |
| Biggest Two-Word U.S. Cities | 0 | - | 4.50 | 98,125 |
| Biggest Cities by Trait #1 | 0 | - | 4.45 | 43,260 |
| Biggest City by Region | 0 | - | 4.50 | 33,936 |
| Most Populous 2nd Cities | 0 | - | 4.75 | 53,791 |
| Biggest Cities in the U.S. - Extreme | 0 | - | 4.95 | 143,046 |
| Biggest Cities in Germany - Extreme | 0 | - | 4.84 | 44,487 |
| 15 Largest Cities in the Middle East With a Map | 0 | - | 4.92 | 104,244 |
| Largest World Capitals with Exceptions | 0 | - | 4.72 | 50,567 |
| Two Largest Cities by First Two Letters | 0 | - | 4.58 | 77,547 |
| Biggest Cities in Each U.S. State - Extreme | 0 | - | 4.91 | 70,462 |
| 500 Biggest US Cities | 0 | - | 4.88 | 100,027 |
| 100 Biggest Cities in North America on a Map | 0 | - | 4.82 | 53,377 |
| Ten Northernmost Megacities | 0 | - | 4.50 | 47,281 |
| Biggest Cities Starting With B | 0 | - | 4.36 | 149,655 |
| Biggest Cities Starting With C | 0 | - | 4.07 | 97,685 |
| Biggest Cities Starting With K | 0 | - | 4.30 | 79,448 |
| Biggest Cities Starting With S | 0 | - | 4.40 | 115,841 |
| Biggest Cities Starting With T | 0 | - | 4.30 | 117,276 |
| Countries With More Than 100 Million People | 0 | - | 4.98 | 138,982 |
| Five Most Populated Countries by Hemisphere | 0 | - | 4.96 | 111,000 |
| Biggest Cities in Europe | 0 | - | 4.75 | 471,088 |
| Biggest Cities once in the Spanish Empire | 0 | - | 4.88 | 51,340 |
| 15 Largest Cities in South America With a Map | 0 | - | 4.94 | 93,189 |
| Biggest Cities in France - Extreme | 0 | - | 4.90 | 44,918 |
| Biggest Cities in Germany | 0 | - | 4.95 | 266,432 |
| Biggest English-Speaking Cities | 0 | - | 4.42 | 136,861 |
| Biggest City by Island | 0 | - | 4.57 | 45,992 |
| Biggest Cities in History | 0 | - | 4.50 | 81,430 |
| Top 10 World Cities Through History | 0 | - | 4.43 | 68,347 |
| Biggest World Cities within 1,000 Km | 0 | - | 4.50 | 40,418 |
| 10 Biggest Cities by U.S. State | 0 | - | 4.91 | 29,942 |
| Biggest World Cities in 1850 | 0 | - | 4.63 | 64,936 |
| Fastest Growing U.S. Cities | 0 | - | 4.36 | 70,514 |
| Second Biggest Cities Quiz | 0 | - | 4.25 | 39,137 |
| Biggest Coastal City by Country | 0 | - | 4.60 | 27,097 |
| Biggest City by Region #2 | 0 | - | 4.46 | 23,300 |
| Biggest Cities by Latitude | 0 | - | 4.76 | 26,372 |
| Northernmost Major City by Country | 0 | - | 4.56 | 31,104 |
| Biggest Cities in Sweden | 0 | - | 4.84 | 37,652 |
| 100 Biggest Cities in Germany on a Map | 0 | - | 4.89 | 78,272 |
| Cities of China (With Some Help) | 0 | - | 4.87 | 28,518 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 128,024 |
| Countries with Megacities | 0 | - | 4.99 | 200,385 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 173,895 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.97 | 99,234 |
| Countries With More than 200 Million People | 0 | - | 4.93 | 97,383 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.97 | 65,224 |
| Top 50 Countries by Population - In Order | 0 | - | 4.97 | 251,267 |
| Largest World Cities With Four Letters | 0 | - | 4.41 | 43,445 |
| Biggest Cities in Europe - Extreme | 0 | - | 4.78 | 69,325 |
| Biggest Mediterranean Cities | 0 | - | 4.57 | 87,107 |
| European Cities in the Top 200 Worldwide | 0 | - | 4.63 | 37,360 |
| Biggest Countries by Population | 0 | - | 4.99 | 1,322,811 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 352,172 |
| Biggest English Cities by Century | 0 | - | 4.90 | 100,224 |
| Biggest Cities in the World - 2100 | 0 | - | 4.29 | 82,439 |
| Most Populous Second Cities in the U.S. | 0 | - | 4.30 | 39,918 |
| Biggest Cities with a Muslim Majority | 0 | - | 4.79 | 100,243 |
| Biggest Cities in Latin America Quiz | 0 | - | 4.45 | 60,843 |
| Five Biggest Cities by Country | 0 | - | 4.66 | 154,116 |
| Flags to Largest Cities | 0 | - | 4.54 | 32,651 |
| Biggest World Cities A-Z | 0 | - | 4.57 | 204,849 |
| Capitals of the Most Populated Countries | 0 | - | 4.96 | 117,711 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.94 | 66,994 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 247,195 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 110,043 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 103,988 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.94 | 71,675 |
| Biggest European Cities by Letter | 0 | - | 4.66 | 119,929 |
| Biggest Cities in the Commonwealth of Nations | 0 | - | 4.65 | 63,195 |
| U.S. Cities With Population > 1 Million | 0 | - | 4.50 | 62,559 |
| U.S. States by Second Most Populous City | 0 | - | 4.43 | 40,685 |
| Biggest "Saint" Cities - United States | 0 | - | 4.47 | 34,261 |
| Biggest Cities by Trait #2 | 0 | - | 4.38 | 14,286 |
| Fastest Shrinking U.S. Cities | 0 | - | 4.45 | 37,169 |
| Biggest Cities in Australia on a Map | 0 | - | 4.62 | 33,420 |
| Countries of Europe by Population | 0 | - | 4.98 | 129,946 |
| Most Populous Countries by Year | 0 | - | 4.81 | 95,026 |
| Most Populous Country by First Two Letters | 0 | - | 4.71 | 67,446 |
| Demographics Multiple Choice | 0 | - | 4.64 | 40,057 |
| Most Populated Countries Bordering the Pacific Ocean | 0 | - | 4.97 | 79,134 |
| Most Populous Countries Bordering Each Other | 0 | - | 4.96 | 97,772 |
| Countries with the Most People Bordering Them | 0 | - | 4.97 | 82,936 |
| Populous Countries Bordering Smaller Countries | 0 | - | 4.98 | 94,498 |
| Densest Countries Bordering Each Other | 0 | - | 4.93 | 72,133 |
| Jewish Cities Quiz | 0 | - | 4.31 | 59,444 |
| 25 Biggest Cities of the Soviet Union | 0 | - | 4.97 | 78,610 |
| 100 Biggest US Cities in 1900 | 0 | - | 4.44 | 61,884 |
| Biggest U.S. Cities Within 100 Kilometers | 0 | - | 4.50 | 41,188 |
| Biggest Cities Near a Border | 0 | - | 4.20 | 28,997 |
| 100 Biggest Cities in Spain on a Map | 0 | - | 4.58 | 36,794 |
| Cities in Squares on a Map - North America | 0 | - | 4.36 | 19,626 |
| Biggest Cities in Japan | 0 | - | 4.65 | 76,206 |
| Biggest Cities in Russia | 0 | - | 4.49 | 77,367 |
| Biggest Cities in France | 0 | - | 4.76 | 201,841 |
| Biggest Cities in Spain | 0 | - | 4.55 | 155,394 |
| Biggest Cities in The Netherlands | 0 | - | 4.50 | 50,866 |
| Biggest Cities in Poland | 0 | - | 4.57 | 48,717 |
| Biggest Cities in the UK | 0 | - | 4.46 | 94,611 |
| Biggest Cities in China | 0 | - | 4.57 | 140,637 |
| Cities of Ireland | 0 | - | 4.43 | 40,123 |
| Biggest Cities in Canada | 0 | - | 4.66 | 121,787 |
| Biggest Cities in Switzerland | 0 | - | 4.52 | 43,934 |
| Biggest Cities in India | 0 | - | 4.71 | 62,980 |
| Biggest Cities in Italy | 0 | - | 4.66 | 219,926 |
| Biggest U.S. Cities Starting with A | 0 | - | 4.40 | 88,869 |
| Biggest U.S. Cities Starting with B | 0 | - | 4.39 | 74,883 |
| Biggest U.S. Cities Starting with C | 0 | - | 4.32 | 83,141 |
| Biggest U.S. Cities Starting with D | 0 | - | 4.08 | 88,941 |
| Biggest U.S. Cities Starting with M | 0 | - | 4.16 | 70,754 |
| Biggest U.S. Cities Starting with N | 0 | - | 4.22 | 66,291 |
| Biggest U.S. Cities Starting with L | 0 | - | 4.23 | 60,887 |
| Biggest U.S. Cities Starting with S | 0 | - | 4.27 | 68,231 |
| Biggest U.S. Cities A-Z | 0 | - | 4.72 | 132,416 |
| Most Populous Countries in 2050 | 0 | - | 4.91 | 206,873 |
| First Countries to Reach 5 Million People | 0 | - | 4.90 | 110,433 |
| Most Populous Modern-Day Countries in 1000 AD | 0 | - | 4.85 | 69,124 |
| Most Populous Modern-Day Countries in 1 AD | 0 | - | 4.97 | 76,688 |
| Most Populous Modern-Day Countries in 1800 AD | 0 | - | 4.91 | 54,047 |
| Most Populous Modern-Day Countries in 1500 AD | 0 | - | 4.93 | 67,385 |
| Most Populous Modern-Day Countries by Century | 0 | - | 4.98 | 87,762 |
| Countries with the Highest Population Density | 0 | - | 4.94 | 145,169 |
| Countries with the Lowest Population Density | 0 | - | 4.98 | 147,462 |
| First U.S. Cities to Reach 100,000 People | 0 | - | 4.69 | 56,678 |
| First U.S. States to Reach 1 Million People | 0 | - | 4.70 | 75,009 |
| Biggest Cities once in the Ottoman Empire | 0 | - | 4.78 | 42,602 |
| Biggest Cities in Brazil | 0 | - | 4.55 | 48,930 |
| Biggest Cities in Mexico | 0 | - | 4.50 | 34,687 |
| 100 Biggest Cities in Italy on a Map | 0 | - | 4.75 | 65,961 |
| All Cities in China with Population of 1 Million | 0 | - | 4.79 | 39,223 |
| All Cities in India with Population of 1 Million | 0 | - | 4.79 | 41,482 |
| Most Populous Islands | 0 | - | 4.71 | 113,569 |
| Islands by Largest City #1 | 0 | - | 4.48 | 82,482 |
| Top 10 Most Populous European Countries | 0 | - | 4.98 | 208,320 |
| Top 10 Most Populous Asian Countries | 0 | - | 4.96 | 163,296 |
| Top 10 Most Populous African Countries | 0 | - | 4.98 | 159,626 |
| Top 10 Most Densely-Populated Countries in Asia | 0 | - | 4.90 | 81,978 |
| Countries by Population Decrease | 0 | - | 4.43 | 46,852 |
| Top 10 Asian Countries by Population Increase | 0 | - | 4.92 | 90,361 |
| Flags of Countries With More Than 100 Million People | 0 | - | 4.97 | 147,288 |
| Countries Gaining the Most Population by 2070 | 0 | - | 4.55 | 50,170 |
| Five Most Populated Countries on a Multicolored World Map | 0 | - | 4.97 | 65,230 |
| Least Dense Countries Bordering Each Other | 0 | - | 4.91 | 7,389 |
| Biggest Nordic Cities | 0 | - | 4.38 | 59,829 |
| Biggest Cities with a Tropical Climate | 0 | - | 4.39 | 30,242 |
| 100 Biggest Cities in New Zealand with a Map | 0 | - | 4.48 | 21,034 |
| Biggest Cities in New Zealand | 0 | - | 4.57 | 22,920 |
| Biggest Cities in North Carolina | 0 | - | 4.65 | 32,348 |
| Most Populous Countries in 1900 | 0 | - | 4.92 | 163,023 |
| Boundary Waters | 0 | - | 4.93 | 81,635 |
| The Same Suffixes - Geography | 0 | - | 4.98 | 75,941 |
| Biggest Countries by Population - Shape Quiz | 0 | - | 4.89 | 51,204 |
| Biggest U.S. Cities Within 200 Kilometers | 0 | - | 4.38 | 37,677 |
| 100 Biggest U.S. Cities on a Map | 0 | - | 4.23 | 93,938 |
| Biggest Cities and Towns in England - 1377 AD | 0 | - | 4.59 | 24,593 |
| Largest Nordic Cities on a Map | 0 | - | 4.79 | 23,850 |
