| All 1M Cities by Proximity | 0 | - | 5.00 | 519,264 |
| 2,000 Biggest World Cities Furthest from a Larger City | 0 | - | 4.98 | 60,437 |
| Biggest Cities in the World | 0 | - | 4.90 | 695,884 |
| Biggest City by Time Zone | 0 | - | 4.84 | 55,320 |
| Biggest City in Every Country | 0 | - | 4.98 | 80,255 |
| Five Most Populated Cities by Continent | 0 | - | 4.95 | 172,355 |
| Biggest Cities in the World - Extreme | 0 | - | 4.98 | 93,286 |
| 10 Biggest Cities That Aren't World Capitals | 0 | - | 4.95 | 98,374 |
| Biggest Cities with Exceptions | 0 | - | 4.91 | 66,043 |
| Biggest Cities in the Southern Hemisphere | 0 | - | 4.84 | 72,636 |
| 100 Biggest Cities on a World Map | 0 | - | 4.99 | 375,506 |
| Ten Biggest Cities by Hemisphere | 0 | - | 4.95 | 66,245 |
| Biggest Cities in Deserts | 0 | - | 4.94 | 42,762 |
| Most Populous Cities as a Percent of Their Continent | 0 | - | 4.91 | 60,370 |
| Ten Southernmost Megacities | 0 | - | 4.81 | 46,735 |
| 100 Biggest Cities in the World with Exceptions | 0 | - | 4.97 | 56,085 |
| Biggest Cities in the United States | 0 | - | 4.93 | 842,705 |
| Biggest Metro Areas in the USA | 0 | - | 4.98 | 337,036 |
| Biggest Spanish-Speaking Cities | 0 | - | 4.87 | 109,680 |
| Biggest Cities by Language | 0 | - | 4.95 | 215,508 |
| Biggest Cities in Europe, 1700 A.D. | 0 | - | 4.95 | 65,162 |
| Most Populous World Capitals | 0 | - | 4.93 | 149,695 |
| Biggest European Cities by Century | 0 | - | 4.98 | 119,808 |
| Megacities on a World Map | 0 | - | 4.98 | 222,656 |
| All 3M Cities on the World Map | 0 | - | 4.95 | 64,139 |
| Every 1,000,000+ City on a Map | 0 | - | 4.99 | 85,672 |
| Biggest City in Each U.S. State | 0 | - | 4.83 | 152,402 |
| Biggest US Cities by Decade | 0 | - | 4.95 | 155,853 |
| Biggest Cities in Asia | 0 | - | 4.94 | 97,131 |
| Biggest Cities in Asia - Extreme | 0 | - | 4.91 | 44,064 |
| Megacities on an Empty Map | 0 | - | 4.95 | 88,285 |
| African Cities in the Top 200 Worldwide | 0 | - | 4.93 | 42,520 |
| Biggest World Cities within 1,000 Km | 0 | - | 4.50 | 40,386 |
| Five Biggest World Cities by Letter #2 | 0 | - | 4.83 | 64,174 |
| Five Biggest World Cities by Letter #1 | 0 | - | 4.94 | 68,295 |
| 15 Largest Cities in Europe With a Map | 0 | - | 4.97 | 201,917 |
| 15 Largest Cities in Asia With a Map | 0 | - | 4.97 | 121,740 |
| 100 Biggest Cities in Europe with a Map | 0 | - | 4.97 | 307,483 |
| 250 Biggest Cities in Europe With a Map | 0 | - | 4.89 | 99,078 |
| Biggest Two-Word U.S. Cities | 0 | - | 4.50 | 98,098 |
| Biggest Cities by Trait #1 | 0 | - | 4.45 | 43,235 |
| Biggest City by Region | 0 | - | 4.50 | 33,915 |
| Most Populous 2nd Cities | 0 | - | 4.75 | 53,753 |
| Biggest Cities in the U.S. - Extreme | 0 | - | 4.95 | 142,433 |
| Biggest Cities in Germany - Extreme | 0 | - | 4.84 | 44,413 |
| 15 Largest Cities in the Middle East With a Map | 0 | - | 4.92 | 103,869 |
| Largest World Capitals with Exceptions | 0 | - | 4.72 | 50,543 |
| Two Largest Cities by First Two Letters | 0 | - | 4.58 | 77,437 |
| Biggest Cities in Each U.S. State - Extreme | 0 | - | 4.91 | 70,355 |
| 500 Biggest US Cities | 0 | - | 4.88 | 99,799 |
| 100 Biggest Cities in North America on a Map | 0 | - | 4.82 | 53,246 |
| Ten Northernmost Megacities | 0 | - | 4.50 | 47,253 |
| Countries With More Than 100 Million People | 0 | - | 4.98 | 138,694 |
| Five Most Populated Countries by Hemisphere | 0 | - | 4.96 | 110,759 |
| Biggest Cities in Europe | 0 | - | 4.76 | 470,321 |
| Biggest Cities once in the Spanish Empire | 0 | - | 4.88 | 51,292 |
| 15 Largest Cities in South America With a Map | 0 | - | 4.94 | 93,064 |
| Biggest Cities in France - Extreme | 0 | - | 4.89 | 44,789 |
| Biggest Cities in Germany | 0 | - | 4.95 | 266,092 |
| Biggest English-Speaking Cities | 0 | - | 4.42 | 136,783 |
| Biggest City by Island | 0 | - | 4.57 | 45,973 |
| Biggest Cities in History | 0 | - | 4.50 | 81,319 |
| Top 10 World Cities Through History | 0 | - | 4.43 | 68,299 |
| 10 Biggest Cities by U.S. State | 0 | - | 4.91 | 29,858 |
| Biggest World Cities in 1850 | 0 | - | 4.63 | 64,894 |
| Biggest Cities Starting With A | 0 | - | 4.55 | 113,325 |
| Biggest Cities Starting With D | 0 | - | 4.49 | 107,598 |
| Biggest Cities Starting With H | 0 | - | 4.55 | 98,594 |
| Biggest Cities Starting With L | 0 | - | 4.44 | 111,499 |
| Biggest Cities Starting With M | 0 | - | 4.50 | 129,944 |
| Biggest Cities Starting With P | 0 | - | 4.47 | 115,632 |
| Fastest Growing U.S. Cities | 0 | - | 4.36 | 70,478 |
| Second Biggest Cities Quiz | 0 | - | 4.25 | 39,117 |
| Biggest Coastal City by Country | 0 | - | 4.60 | 27,090 |
| Biggest City by Region #2 | 0 | - | 4.46 | 23,283 |
| Biggest Cities by Latitude | 0 | - | 4.76 | 26,358 |
| Northernmost Major City by Country | 0 | - | 4.56 | 31,082 |
| Biggest Cities in Sweden | 0 | - | 4.84 | 37,615 |
| 100 Biggest Cities in Germany on a Map | 0 | - | 4.89 | 78,010 |
| Cities of China (With Some Help) | 0 | - | 4.87 | 28,491 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 127,771 |
| Countries with Megacities | 0 | - | 4.99 | 200,043 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 173,603 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.97 | 99,088 |
| Countries With More than 200 Million People | 0 | - | 4.93 | 97,143 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 65,071 |
| Top 50 Countries by Population - In Order | 0 | - | 4.97 | 250,842 |
| Largest World Cities With Four Letters | 0 | - | 4.41 | 43,423 |
| Biggest Cities in Europe - Extreme | 0 | - | 4.78 | 69,277 |
| Biggest Mediterranean Cities | 0 | - | 4.57 | 87,071 |
| European Cities in the Top 200 Worldwide | 0 | - | 4.63 | 37,284 |
| Biggest Countries by Population | 0 | - | 4.99 | 1,321,393 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 351,662 |
| Biggest English Cities by Century | 0 | - | 4.90 | 100,144 |
| Biggest Cities in the World - 2100 | 0 | - | 4.29 | 82,300 |
| Most Populous Second Cities in the U.S. | 0 | - | 4.30 | 39,901 |
| Biggest Cities Starting With B | 0 | - | 4.36 | 149,504 |
| Biggest Cities Starting With C | 0 | - | 4.07 | 97,638 |
| Biggest Cities Starting With K | 0 | - | 4.30 | 79,394 |
| Biggest Cities Starting With S | 0 | - | 4.40 | 115,732 |
| Biggest Cities Starting With T | 0 | - | 4.30 | 117,162 |
| Biggest Cities with a Muslim Majority | 0 | - | 4.79 | 100,160 |
| Biggest Cities in Latin America Quiz | 0 | - | 4.45 | 60,790 |
| Five Biggest Cities by Country | 0 | - | 4.66 | 153,944 |
| Flags to Largest Cities | 0 | - | 4.54 | 32,571 |
| Biggest World Cities A-Z | 0 | - | 4.57 | 204,598 |
| Capitals of the Most Populated Countries | 0 | - | 4.96 | 117,617 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.94 | 66,881 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 246,987 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 109,906 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 103,921 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.94 | 71,513 |
| Biggest European Cities by Letter | 0 | - | 4.66 | 119,850 |
| Biggest Cities in the Commonwealth of Nations | 0 | - | 4.65 | 63,163 |
| U.S. Cities With Population > 1 Million | 0 | - | 4.50 | 62,369 |
| U.S. States by Second Most Populous City | 0 | - | 4.43 | 40,643 |
| Biggest "Saint" Cities - United States | 0 | - | 4.47 | 34,231 |
| Biggest Cities by Trait #2 | 0 | - | 4.38 | 14,272 |
| Fastest Shrinking U.S. Cities | 0 | - | 4.42 | 37,080 |
| Biggest Cities in Australia on a Map | 0 | - | 4.62 | 33,360 |
| Countries of Europe by Population | 0 | - | 4.98 | 129,533 |
| Most Populous Countries by Year | 0 | - | 4.81 | 94,861 |
| Most Populous Country by First Two Letters | 0 | - | 4.75 | 67,396 |
| Demographics Multiple Choice | 0 | - | 4.64 | 40,026 |
| Most Populated Countries Bordering the Pacific Ocean | 0 | - | 4.97 | 79,073 |
| Most Populous Countries Bordering Each Other | 0 | - | 4.96 | 97,628 |
| Countries with the Most People Bordering Them | 0 | - | 4.97 | 82,377 |
| Populous Countries Bordering Smaller Countries | 0 | - | 4.97 | 94,375 |
| Densest Countries Bordering Each Other | 0 | - | 4.93 | 71,958 |
| Jewish Cities Quiz | 0 | - | 4.31 | 59,424 |
| 25 Biggest Cities of the Soviet Union | 0 | - | 4.97 | 78,538 |
| 100 Biggest US Cities in 1900 | 0 | - | 4.44 | 61,846 |
| Biggest U.S. Cities Within 100 Kilometers | 0 | - | 4.50 | 41,046 |
| Biggest Cities Near a Border | 0 | - | 4.20 | 28,941 |
| 100 Biggest Cities in Spain on a Map | 0 | - | 4.58 | 36,718 |
| Cities in Squares on a Map - North America | 0 | - | 4.36 | 19,606 |
| Biggest Cities in Japan | 0 | - | 4.65 | 76,143 |
| Biggest Cities in Russia | 0 | - | 4.49 | 77,305 |
| Biggest Cities in France | 0 | - | 4.76 | 201,534 |
| Biggest Cities in Spain | 0 | - | 4.55 | 155,252 |
| Biggest Cities in The Netherlands | 0 | - | 4.50 | 50,807 |
| Biggest Cities in Poland | 0 | - | 4.57 | 48,635 |
| Biggest Cities in the UK | 0 | - | 4.46 | 94,472 |
| Biggest Cities in China | 0 | - | 4.57 | 140,417 |
| Cities of Ireland | 0 | - | 4.43 | 40,071 |
| Biggest Cities in Canada | 0 | - | 4.66 | 121,657 |
| Biggest Cities in Switzerland | 0 | - | 4.52 | 43,893 |
| Biggest Cities in India | 0 | - | 4.71 | 62,908 |
| Biggest Cities in Italy | 0 | - | 4.66 | 219,619 |
| Biggest U.S. Cities Starting with A | 0 | - | 4.40 | 88,726 |
| Biggest U.S. Cities Starting with B | 0 | - | 4.39 | 74,754 |
| Biggest U.S. Cities Starting with C | 0 | - | 4.32 | 83,003 |
| Biggest U.S. Cities Starting with D | 0 | - | 4.08 | 88,814 |
| Biggest U.S. Cities Starting with M | 0 | - | 4.15 | 70,632 |
| Biggest U.S. Cities Starting with N | 0 | - | 4.22 | 66,168 |
| Biggest U.S. Cities Starting with L | 0 | - | 4.23 | 60,850 |
| Biggest U.S. Cities Starting with S | 0 | - | 4.27 | 68,187 |
| Biggest U.S. Cities A-Z | 0 | - | 4.72 | 132,350 |
| Most Populous Countries in 2050 | 0 | - | 4.91 | 206,665 |
| First Countries to Reach 5 Million People | 0 | - | 4.90 | 110,340 |
| Most Populous Modern-Day Countries in 1000 AD | 0 | - | 4.85 | 69,070 |
| Most Populous Modern-Day Countries in 1 AD | 0 | - | 4.97 | 76,623 |
| Most Populous Modern-Day Countries in 1800 AD | 0 | - | 4.91 | 53,999 |
| Most Populous Modern-Day Countries in 1500 AD | 0 | - | 4.92 | 67,337 |
| Most Populous Modern-Day Countries by Century | 0 | - | 4.98 | 87,653 |
| Countries with the Highest Population Density | 0 | - | 4.93 | 144,882 |
| Countries with the Lowest Population Density | 0 | - | 4.97 | 147,061 |
| First U.S. Cities to Reach 100,000 People | 0 | - | 4.70 | 56,639 |
| First U.S. States to Reach 1 Million People | 0 | - | 4.70 | 74,945 |
| Biggest Cities once in the Ottoman Empire | 0 | - | 4.78 | 42,588 |
| Biggest Cities in Brazil | 0 | - | 4.55 | 48,867 |
| Biggest Cities in Mexico | 0 | - | 4.50 | 34,616 |
| 100 Biggest Cities in Italy on a Map | 0 | - | 4.75 | 65,762 |
| All Cities in China with Population of 1 Million | 0 | - | 4.79 | 39,155 |
| All Cities in India with Population of 1 Million | 0 | - | 4.79 | 41,434 |
| Most Populous Islands | 0 | - | 4.71 | 113,466 |
| Islands by Largest City #1 | 0 | - | 4.48 | 82,472 |
| Top 10 Most Populous European Countries | 0 | - | 4.98 | 207,958 |
| Top 10 Most Populous Asian Countries | 0 | - | 4.96 | 163,047 |
| Top 10 Most Populous African Countries | 0 | - | 4.98 | 159,327 |
| Top 10 Most Densely-Populated Countries in Asia | 0 | - | 4.90 | 81,859 |
| Countries by Population Decrease | 0 | - | 4.43 | 46,813 |
| Top 10 Asian Countries by Population Increase | 0 | - | 4.92 | 90,183 |
| Flags of Countries With More Than 100 Million People | 0 | - | 4.97 | 147,154 |
| Countries Gaining the Most Population by 2070 | 0 | - | 4.55 | 50,118 |
| Five Most Populated Countries on a Multicolored World Map | 0 | - | 4.97 | 65,144 |
| Least Dense Countries Bordering Each Other | 0 | - | 4.90 | 7,227 |
| Biggest Nordic Cities | 0 | - | 4.38 | 59,815 |
| Biggest Cities with a Tropical Climate | 0 | - | 4.39 | 30,213 |
| 100 Biggest Cities in New Zealand with a Map | 0 | - | 4.48 | 20,975 |
| Biggest Cities in New Zealand | 0 | - | 4.57 | 22,900 |
| Biggest Cities in North Carolina | 0 | - | 4.65 | 32,302 |
| Most Populous Countries in 1900 | 0 | - | 4.92 | 162,910 |
| Top 10 Most Remote European Capitals | 0 | - | 4.85 | 84,942 |
| European Capitals Furthest from the Sea | 0 | - | 4.91 | 67,359 |
| Countries Closest to Africa | 0 | - | 4.95 | 146,114 |
| Boundary Waters | 0 | - | 4.93 | 81,597 |
| The Same Suffixes - Geography | 0 | - | 4.98 | 75,845 |
| Biggest Countries by Population - Shape Quiz | 0 | - | 4.89 | 51,146 |
| Biggest U.S. Cities Within 200 Kilometers | 0 | - | 4.38 | 37,630 |
