| Biggest Cities in the World | 0 | - | 4.90 | 696,629 |
| Biggest City by Time Zone | 0 | - | 4.84 | 55,368 |
| Biggest City in Every Country | 0 | - | 4.98 | 80,338 |
| Five Most Populated Cities by Continent | 0 | - | 4.95 | 172,561 |
| Biggest Cities in the World - Extreme | 0 | - | 4.98 | 93,385 |
| 10 Biggest Cities That Aren't World Capitals | 0 | - | 4.95 | 98,498 |
| Biggest Cities with Exceptions | 0 | - | 4.91 | 66,111 |
| Biggest Cities in the Southern Hemisphere | 0 | - | 4.84 | 72,714 |
| 100 Biggest Cities on a World Map | 0 | - | 4.99 | 375,803 |
| Ten Biggest Cities by Hemisphere | 0 | - | 4.95 | 66,325 |
| Biggest Cities in Deserts | 0 | - | 4.94 | 42,789 |
| Most Populous Cities as a Percent of Their Continent | 0 | - | 4.91 | 60,431 |
| Ten Southernmost Megacities | 0 | - | 4.81 | 46,758 |
| 100 Biggest Cities in the World with Exceptions | 0 | - | 4.97 | 56,143 |
| Biggest Cities in the United States | 0 | - | 4.93 | 843,369 |
| Biggest Metro Areas in the USA | 0 | - | 4.98 | 337,192 |
| Biggest Spanish-Speaking Cities | 0 | - | 4.87 | 109,731 |
| Biggest Cities by Language | 0 | - | 4.95 | 215,601 |
| Biggest Cities in Europe, 1700 A.D. | 0 | - | 4.95 | 65,184 |
| Most Populous World Capitals | 0 | - | 4.93 | 149,772 |
| Biggest European Cities by Century | 0 | - | 4.98 | 119,868 |
| Megacities on a World Map | 0 | - | 4.98 | 222,773 |
| All 1M Cities by Proximity | 0 | - | 5.00 | 519,642 |
| 2,000 Biggest World Cities Furthest from a Larger City | 0 | - | 4.98 | 60,492 |
| All 3M Cities on the World Map | 0 | - | 4.95 | 64,190 |
| Every 1,000,000+ City on a Map | 0 | - | 4.99 | 85,758 |
| Biggest City in Each U.S. State | 0 | - | 4.83 | 152,511 |
| Biggest US Cities by Decade | 0 | - | 4.95 | 155,941 |
| Biggest Cities in Asia | 0 | - | 4.94 | 97,215 |
| Biggest Cities in Asia - Extreme | 0 | - | 4.91 | 44,109 |
| Megacities on an Empty Map | 0 | - | 4.95 | 88,337 |
| African Cities in the Top 200 Worldwide | 0 | - | 4.93 | 42,578 |
| Biggest Cities Starting With A | 0 | - | 4.55 | 113,387 |
| Biggest Cities Starting With D | 0 | - | 4.49 | 107,634 |
| Biggest Cities Starting With H | 0 | - | 4.55 | 98,666 |
| Biggest Cities Starting With L | 0 | - | 4.44 | 111,559 |
| Biggest Cities Starting With M | 0 | - | 4.50 | 130,028 |
| Biggest Cities Starting With P | 0 | - | 4.47 | 115,702 |
| Five Biggest World Cities by Letter #2 | 0 | - | 4.83 | 64,202 |
| Five Biggest World Cities by Letter #1 | 0 | - | 4.94 | 68,340 |
| 15 Largest Cities in Europe With a Map | 0 | - | 4.97 | 202,055 |
| 15 Largest Cities in Asia With a Map | 0 | - | 4.97 | 121,856 |
| 100 Biggest Cities in Europe with a Map | 0 | - | 4.97 | 307,728 |
| 250 Biggest Cities in Europe With a Map | 0 | - | 4.89 | 99,213 |
| Biggest Two-Word U.S. Cities | 0 | - | 4.50 | 98,117 |
| Biggest Cities by Trait #1 | 0 | - | 4.45 | 43,251 |
| Biggest City by Region | 0 | - | 4.50 | 33,931 |
| Most Populous 2nd Cities | 0 | - | 4.75 | 53,776 |
| Biggest Cities in the U.S. - Extreme | 0 | - | 4.95 | 142,814 |
| Biggest Cities in Germany - Extreme | 0 | - | 4.84 | 44,463 |
| 15 Largest Cities in the Middle East With a Map | 0 | - | 4.92 | 104,155 |
| Largest World Capitals with Exceptions | 0 | - | 4.72 | 50,557 |
| Two Largest Cities by First Two Letters | 0 | - | 4.58 | 77,512 |
| Biggest Cities in Each U.S. State - Extreme | 0 | - | 4.91 | 70,425 |
| 500 Biggest US Cities | 0 | - | 4.88 | 99,943 |
| 100 Biggest Cities in North America on a Map | 0 | - | 4.82 | 53,339 |
| Ten Northernmost Megacities | 0 | - | 4.50 | 47,269 |
| Biggest Cities Starting With B | 0 | - | 4.36 | 149,598 |
| Biggest Cities Starting With C | 0 | - | 4.07 | 97,667 |
| Biggest Cities Starting With K | 0 | - | 4.30 | 79,430 |
| Biggest Cities Starting With S | 0 | - | 4.40 | 115,807 |
| Biggest Cities Starting With T | 0 | - | 4.30 | 117,237 |
| Countries With More Than 100 Million People | 0 | - | 4.98 | 138,850 |
| Five Most Populated Countries by Hemisphere | 0 | - | 4.96 | 110,877 |
| Biggest Cities in Europe | 0 | - | 4.75 | 470,808 |
| Biggest Cities once in the Spanish Empire | 0 | - | 4.88 | 51,322 |
| 15 Largest Cities in South America With a Map | 0 | - | 4.94 | 93,138 |
| Biggest Cities in France - Extreme | 0 | - | 4.89 | 44,868 |
| Biggest Cities in Germany | 0 | - | 4.95 | 266,328 |
| Biggest English-Speaking Cities | 0 | - | 4.42 | 136,830 |
| Biggest City by Island | 0 | - | 4.57 | 45,988 |
| Biggest Cities in History | 0 | - | 4.50 | 81,392 |
| Top 10 World Cities Through History | 0 | - | 4.43 | 68,331 |
| Biggest World Cities within 1,000 Km | 0 | - | 4.50 | 40,397 |
| 10 Biggest Cities by U.S. State | 0 | - | 4.91 | 29,918 |
| Biggest World Cities in 1850 | 0 | - | 4.63 | 64,916 |
| Fastest Growing U.S. Cities | 0 | - | 4.36 | 70,500 |
| Second Biggest Cities Quiz | 0 | - | 4.25 | 39,128 |
| Biggest Coastal City by Country | 0 | - | 4.60 | 27,094 |
| Biggest City by Region #2 | 0 | - | 4.46 | 23,294 |
| Biggest Cities by Latitude | 0 | - | 4.76 | 26,368 |
| Northernmost Major City by Country | 0 | - | 4.56 | 31,098 |
| Biggest Cities in Sweden | 0 | - | 4.84 | 37,637 |
| 100 Biggest Cities in Germany on a Map | 0 | - | 4.89 | 78,174 |
| Cities of China (With Some Help) | 0 | - | 4.87 | 28,506 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 127,935 |
| Countries with Megacities | 0 | - | 4.99 | 200,258 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 173,800 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.97 | 99,180 |
| Countries With More than 200 Million People | 0 | - | 4.94 | 97,298 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.97 | 65,170 |
| Top 50 Countries by Population - In Order | 0 | - | 4.97 | 251,137 |
| Largest World Cities With Four Letters | 0 | - | 4.41 | 43,433 |
| Biggest Cities in Europe - Extreme | 0 | - | 4.78 | 69,310 |
| Biggest Mediterranean Cities | 0 | - | 4.57 | 87,094 |
| European Cities in the Top 200 Worldwide | 0 | - | 4.63 | 37,335 |
| Biggest Countries by Population | 0 | - | 4.99 | 1,322,287 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 352,072 |
| Biggest English Cities by Century | 0 | - | 4.90 | 100,189 |
| Biggest Cities in the World - 2100 | 0 | - | 4.29 | 82,402 |
| Most Populous Second Cities in the U.S. | 0 | - | 4.30 | 39,909 |
| Biggest Cities with a Muslim Majority | 0 | - | 4.79 | 100,218 |
| Biggest Cities in Latin America Quiz | 0 | - | 4.45 | 60,817 |
| Five Biggest Cities by Country | 0 | - | 4.66 | 154,048 |
| Flags to Largest Cities | 0 | - | 4.54 | 32,621 |
| Biggest World Cities A-Z | 0 | - | 4.57 | 204,749 |
| Capitals of the Most Populated Countries | 0 | - | 4.96 | 117,682 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.94 | 66,959 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 247,117 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 109,991 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 103,964 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.94 | 71,608 |
| Biggest European Cities by Letter | 0 | - | 4.66 | 119,901 |
| Biggest Cities in the Commonwealth of Nations | 0 | - | 4.65 | 63,188 |
| U.S. Cities With Population > 1 Million | 0 | - | 4.50 | 62,484 |
| U.S. States by Second Most Populous City | 0 | - | 4.43 | 40,665 |
| Biggest "Saint" Cities - United States | 0 | - | 4.47 | 34,252 |
| Biggest Cities by Trait #2 | 0 | - | 4.38 | 14,281 |
| Fastest Shrinking U.S. Cities | 0 | - | 4.42 | 37,136 |
| Biggest Cities in Australia on a Map | 0 | - | 4.62 | 33,401 |
| Countries of Europe by Population | 0 | - | 4.98 | 129,758 |
| Most Populous Countries by Year | 0 | - | 4.81 | 94,967 |
| Most Populous Country by First Two Letters | 0 | - | 4.71 | 67,428 |
| Demographics Multiple Choice | 0 | - | 4.64 | 40,037 |
| Most Populated Countries Bordering the Pacific Ocean | 0 | - | 4.97 | 79,119 |
| Most Populous Countries Bordering Each Other | 0 | - | 4.96 | 97,714 |
| Countries with the Most People Bordering Them | 0 | - | 4.97 | 82,763 |
| Populous Countries Bordering Smaller Countries | 0 | - | 4.98 | 94,449 |
| Densest Countries Bordering Each Other | 0 | - | 4.93 | 72,086 |
| Jewish Cities Quiz | 0 | - | 4.31 | 59,438 |
| 25 Biggest Cities of the Soviet Union | 0 | - | 4.97 | 78,585 |
| 100 Biggest US Cities in 1900 | 0 | - | 4.44 | 61,872 |
| Biggest U.S. Cities Within 100 Kilometers | 0 | - | 4.50 | 41,118 |
| Biggest Cities Near a Border | 0 | - | 4.20 | 28,974 |
| 100 Biggest Cities in Spain on a Map | 0 | - | 4.58 | 36,768 |
| Cities in Squares on a Map - North America | 0 | - | 4.36 | 19,622 |
| Biggest Cities in Japan | 0 | - | 4.65 | 76,187 |
| Biggest Cities in Russia | 0 | - | 4.49 | 77,341 |
| Biggest Cities in France | 0 | - | 4.76 | 201,729 |
| Biggest Cities in Spain | 0 | - | 4.55 | 155,346 |
| Biggest Cities in The Netherlands | 0 | - | 4.50 | 50,845 |
| Biggest Cities in Poland | 0 | - | 4.57 | 48,689 |
| Biggest Cities in the UK | 0 | - | 4.46 | 94,555 |
| Biggest Cities in China | 0 | - | 4.57 | 140,554 |
| Cities of Ireland | 0 | - | 4.43 | 40,104 |
| Biggest Cities in Canada | 0 | - | 4.66 | 121,731 |
| Biggest Cities in Switzerland | 0 | - | 4.52 | 43,920 |
| Biggest Cities in India | 0 | - | 4.71 | 62,957 |
| Biggest Cities in Italy | 0 | - | 4.66 | 219,805 |
| Biggest U.S. Cities Starting with A | 0 | - | 4.40 | 88,816 |
| Biggest U.S. Cities Starting with B | 0 | - | 4.39 | 74,836 |
| Biggest U.S. Cities Starting with C | 0 | - | 4.32 | 83,091 |
| Biggest U.S. Cities Starting with D | 0 | - | 4.08 | 88,888 |
| Biggest U.S. Cities Starting with M | 0 | - | 4.15 | 70,702 |
| Biggest U.S. Cities Starting with N | 0 | - | 4.22 | 66,243 |
| Biggest U.S. Cities Starting with L | 0 | - | 4.23 | 60,872 |
| Biggest U.S. Cities Starting with S | 0 | - | 4.27 | 68,213 |
| Biggest U.S. Cities A-Z | 0 | - | 4.72 | 132,391 |
| Most Populous Countries in 2050 | 0 | - | 4.91 | 206,801 |
| First Countries to Reach 5 Million People | 0 | - | 4.90 | 110,405 |
| Most Populous Modern-Day Countries in 1000 AD | 0 | - | 4.85 | 69,099 |
| Most Populous Modern-Day Countries in 1 AD | 0 | - | 4.97 | 76,665 |
| Most Populous Modern-Day Countries in 1800 AD | 0 | - | 4.92 | 54,032 |
| Most Populous Modern-Day Countries in 1500 AD | 0 | - | 4.93 | 67,369 |
| Most Populous Modern-Day Countries by Century | 0 | - | 4.98 | 87,728 |
| Countries with the Highest Population Density | 0 | - | 4.93 | 144,973 |
| Countries with the Lowest Population Density | 0 | - | 4.98 | 147,376 |
| First U.S. Cities to Reach 100,000 People | 0 | - | 4.69 | 56,665 |
| First U.S. States to Reach 1 Million People | 0 | - | 4.70 | 74,989 |
| Biggest Cities once in the Ottoman Empire | 0 | - | 4.78 | 42,595 |
| Biggest Cities in Brazil | 0 | - | 4.55 | 48,897 |
| Biggest Cities in Mexico | 0 | - | 4.50 | 34,661 |
| 100 Biggest Cities in Italy on a Map | 0 | - | 4.75 | 65,896 |
| All Cities in China with Population of 1 Million | 0 | - | 4.79 | 39,198 |
| All Cities in India with Population of 1 Million | 0 | - | 4.79 | 41,465 |
| Most Populous Islands | 0 | - | 4.71 | 113,545 |
| Islands by Largest City #1 | 0 | - | 4.48 | 82,480 |
| Top 10 Most Populous European Countries | 0 | - | 4.98 | 208,142 |
| Top 10 Most Populous Asian Countries | 0 | - | 4.96 | 163,184 |
| Top 10 Most Populous African Countries | 0 | - | 4.98 | 159,475 |
| Top 10 Most Densely-Populated Countries in Asia | 0 | - | 4.90 | 81,925 |
| Countries by Population Decrease | 0 | - | 4.43 | 46,839 |
| Top 10 Asian Countries by Population Increase | 0 | - | 4.92 | 90,282 |
| Flags of Countries With More Than 100 Million People | 0 | - | 4.97 | 147,237 |
| Countries Gaining the Most Population by 2070 | 0 | - | 4.55 | 50,151 |
| Five Most Populated Countries on a Multicolored World Map | 0 | - | 4.97 | 65,196 |
| Least Dense Countries Bordering Each Other | 0 | - | 4.90 | 7,336 |
| Biggest Nordic Cities | 0 | - | 4.38 | 59,826 |
| Biggest Cities with a Tropical Climate | 0 | - | 4.39 | 30,236 |
| 100 Biggest Cities in New Zealand with a Map | 0 | - | 4.48 | 21,014 |
| Biggest Cities in New Zealand | 0 | - | 4.57 | 22,916 |
| Biggest Cities in North Carolina | 0 | - | 4.66 | 32,338 |
| Most Populous Countries in 1900 | 0 | - | 4.92 | 162,981 |
| Boundary Waters | 0 | - | 4.93 | 81,621 |
| The Same Suffixes - Geography | 0 | - | 4.98 | 75,901 |
| Biggest Countries by Population - Shape Quiz | 0 | - | 4.89 | 51,181 |
| Biggest U.S. Cities Within 200 Kilometers | 0 | - | 4.38 | 37,659 |
| 100 Biggest U.S. Cities on a Map | 0 | - | 4.23 | 93,817 |
| Biggest Cities and Towns in England - 1377 AD | 0 | - | 4.59 | 24,583 |
| Largest Nordic Cities on a Map | 0 | - | 4.79 | 23,829 |
