| Neutral European Countries of WWII | 0 | - | 4.91 | 130,044 |
| Biggest Cities in Europe, 1700 A.D. | 0 | - | 4.95 | 64,485 |
| Biggest European Cities by Century | 0 | - | 4.97 | 117,710 |
| Biggest US Cities by Decade | 0 | - | 4.95 | 153,705 |
| Biggest Cities in the World | 0 | - | 4.89 | 678,392 |
| 100 Biggest Cities on a World Map | 0 | - | 4.99 | 367,259 |
| Biggest Cities in the United States | 0 | - | 4.92 | 808,248 |
| Biggest Metro Areas in the USA | 0 | - | 4.98 | 320,745 |
| Biggest City by Time Zone | 0 | - | 4.83 | 53,401 |
| Biggest City in Every Country | 0 | - | 4.97 | 77,549 |
| Five Most Populated Cities by Continent | 0 | - | 4.95 | 167,268 |
| Biggest Cities in the World - Extreme | 0 | - | 4.98 | 90,802 |
| 10 Biggest Cities That Aren't World Capitals | 0 | - | 4.94 | 94,473 |
| Biggest Cities with Exceptions | 0 | - | 4.90 | 59,587 |
| Biggest Cities in the Southern Hemisphere | 0 | - | 4.85 | 70,161 |
| Ten Biggest Cities by Hemisphere | 0 | - | 4.94 | 64,197 |
| Biggest Cities in Deserts | 0 | - | 4.93 | 42,000 |
| Most Populous Cities as a Percent of Their Continent | 0 | - | 4.91 | 59,046 |
| 100 Biggest Cities in the World with Exceptions | 0 | - | 4.97 | 54,386 |
| Biggest English Cities by Century | 0 | - | 4.89 | 98,979 |
| All 1M Cities by Proximity | 0 | - | 5.00 | 508,696 |
| Biggest Spanish-Speaking Cities | 0 | - | 4.87 | 108,149 |
| Biggest Cities by Language | 0 | - | 4.95 | 212,414 |
| Most Populous World Capitals | 0 | - | 4.92 | 146,570 |
| Biggest Cities once in the Spanish Empire | 0 | - | 4.87 | 50,542 |
| Megacities on a World Map | 0 | - | 4.98 | 219,080 |
| 2,000 Biggest World Cities Furthest from a Larger City | 0 | - | 4.98 | 59,394 |
| All 3M Cities on the World Map | 0 | - | 4.95 | 62,722 |
| Every 1,000,000+ City on a Map | 0 | - | 4.99 | 82,961 |
| Biggest City in Each U.S. State | 0 | - | 4.85 | 150,001 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 97,704 |
| Countries of Europe After World War II | 0 | - | 4.98 | 169,120 |
| Biggest Cities in Asia | 0 | - | 4.94 | 94,982 |
| Biggest Cities in Asia - Extreme | 0 | - | 4.91 | 42,929 |
| Megacities on an Empty Map | 0 | - | 4.96 | 86,797 |
| African Cities in the Top 200 Worldwide | 0 | - | 4.93 | 41,106 |
| Biggest Cities in History | 0 | - | 4.49 | 79,455 |
| Top 10 World Cities Through History | 0 | - | 4.42 | 67,669 |
| Five Biggest World Cities by Letter #2 | 0 | - | 4.83 | 63,079 |
| Five Biggest World Cities by Letter #1 | 0 | - | 4.94 | 67,073 |
| 15 Largest Cities in Europe With a Map | 0 | - | 4.97 | 197,385 |
| 15 Largest Cities in Asia With a Map | 0 | - | 4.97 | 108,304 |
| 100 Biggest Cities in Europe with a Map | 0 | - | 4.97 | 301,382 |
| 250 Biggest Cities in Europe With a Map | 0 | - | 4.89 | 96,136 |
| Biggest World Cities in 1850 | 0 | - | 4.58 | 64,284 |
| Biggest Cities in the U.S. - Extreme | 0 | - | 4.93 | 130,606 |
| Biggest Cities in Germany - Extreme | 0 | - | 4.82 | 43,662 |
| 15 Largest Cities in the Middle East With a Map | 0 | - | 4.92 | 90,764 |
| Biggest Cities in Each U.S. State - Extreme | 0 | - | 4.91 | 68,866 |
| 500 Biggest US Cities | 0 | - | 4.85 | 96,255 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 137,854 |
| 15 Largest Cities in South America With a Map | 0 | - | 4.94 | 90,374 |
| Biggest Cities in France - Extreme | 0 | - | 4.88 | 42,964 |
| Biggest Cities in Germany | 0 | - | 4.95 | 260,792 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 121,964 |
| Biggest Cities in Europe | 0 | - | 4.75 | 457,383 |
| Biggest Two-Word U.S. Cities | 0 | - | 4.48 | 97,310 |
| Biggest Cities by Trait #1 | 0 | - | 4.44 | 42,878 |
| Biggest City by Region | 0 | - | 4.48 | 33,303 |
| Most Populous 2nd Cities | 0 | - | 4.72 | 53,018 |
| 25 Biggest Cities of the Soviet Union | 0 | - | 4.96 | 70,260 |
| Largest World Capitals with Exceptions | 0 | - | 4.72 | 50,209 |
| Two Largest Cities by First Two Letters | 0 | - | 4.58 | 67,697 |
| 10 Biggest Cities by U.S. State | 0 | - | 4.90 | 28,344 |
| Ten Northernmost Megacities | 0 | - | 4.49 | 46,813 |
| Ten Southernmost Megacities | 0 | - | 4.80 | 45,994 |
| Biggest Cities in Sweden | 0 | - | 4.83 | 36,994 |
| 100 Biggest Cities in Germany on a Map | 0 | - | 4.89 | 74,650 |
| Biggest English-Speaking Cities | 0 | - | 4.42 | 135,699 |
| Biggest European Cities by Letter | 0 | - | 4.65 | 118,068 |
| Biggest City by Island | 0 | - | 4.57 | 45,606 |
| Largest Cities in Alexander's Empire | 0 | - | 4.56 | 38,487 |
| Biggest World Cities within 1,000 Km | 0 | - | 4.50 | 39,864 |
| Cities of China (With Some Help) | 0 | - | 4.86 | 27,990 |
| Biggest Cities Starting With A | 0 | - | 4.55 | 111,108 |
| Biggest Cities Starting With D | 0 | - | 4.48 | 106,188 |
| Biggest Cities Starting With H | 0 | - | 4.53 | 96,745 |
| Biggest Cities Starting With L | 0 | - | 4.44 | 109,577 |
| Biggest Cities Starting With M | 0 | - | 4.50 | 127,533 |
| Biggest Cities Starting With P | 0 | - | 4.47 | 113,525 |
| Biggest Cities once in the Ottoman Empire | 0 | - | 4.79 | 42,361 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.91 | 99,205 |
| Biggest Cities with a Muslim Majority | 0 | - | 4.79 | 98,465 |
| Fastest Growing U.S. Cities | 0 | - | 4.36 | 69,924 |
| Biggest Cities in Latin America Quiz | 0 | - | 4.44 | 59,982 |
| Second Biggest Cities Quiz | 0 | - | 4.25 | 38,843 |
| Biggest Coastal City by Country | 0 | - | 4.59 | 26,962 |
| Five Biggest Cities by Country | 0 | - | 4.66 | 151,047 |
| Biggest City by Region #2 | 0 | - | 4.45 | 22,908 |
| Biggest Cities by Latitude | 0 | - | 4.76 | 26,128 |
| Largest World Cities With Four Letters | 0 | - | 4.41 | 43,048 |
| Northernmost Major City by Country | 0 | - | 4.55 | 30,673 |
| Biggest Cities in Europe - Extreme | 0 | - | 4.79 | 68,330 |
| Biggest Mediterranean Cities | 0 | - | 4.57 | 86,220 |
| European Cities in the Top 200 Worldwide | 0 | - | 4.64 | 36,476 |
| Biggest World Cities A-Z | 0 | - | 4.55 | 192,162 |
| Biggest Countries by Population | 0 | - | 4.99 | 1,301,716 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 347,467 |
| Countries With More Than 100 Million People | 0 | - | 4.98 | 136,127 |
| Five Most Populated Countries by Hemisphere | 0 | - | 4.95 | 108,817 |
| Biggest Cities in the Commonwealth of Nations | 0 | - | 4.59 | 62,721 |
| Biggest Cities once in the Roman Empire | 0 | - | 4.79 | 64,636 |
| U.S. Cities With Population > 1 Million | 0 | - | 4.49 | 55,500 |
| U.S. States by Second Most Populous City | 0 | - | 4.42 | 40,043 |
| Biggest "Saint" Cities - United States | 0 | - | 4.46 | 33,781 |
| Biggest Cities in the World - 2100 | 0 | - | 4.29 | 80,172 |
| Biggest Cities and Towns in England - 1377 AD | 0 | - | 4.59 | 24,320 |
| 100 Biggest Cities in North America on a Map | 0 | - | 4.80 | 51,746 |
| Biggest Cities in Australia on a Map | 0 | - | 4.61 | 32,527 |
| Most Populous Second Cities in the U.S. | 0 | - | 4.30 | 39,747 |
| Biggest Cities Starting With B | 0 | - | 4.35 | 146,873 |
| Biggest Cities Starting With C | 0 | - | 4.07 | 96,179 |
| Biggest Cities Starting With K | 0 | - | 4.29 | 78,221 |
| Biggest Cities Starting With S | 0 | - | 4.39 | 113,813 |
| Biggest Cities Starting With T | 0 | - | 4.30 | 115,374 |
| Countries of the German Empire | 0 | - | 4.50 | 33,278 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 124,069 |
| Countries with Megacities | 0 | - | 4.99 | 194,639 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 169,381 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.97 | 96,822 |
| Countries With More than 200 Million People | 0 | - | 4.93 | 93,626 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.97 | 62,676 |
| Top 50 Countries by Population - In Order | 0 | - | 4.97 | 244,942 |
| 100 Biggest US Cities in 1900 | 0 | - | 4.43 | 61,260 |
| Biggest U.S. Cities Within 100 Kilometers | 0 | - | 4.46 | 37,631 |
| 100 Biggest Cities in Spain on a Map | 0 | - | 4.57 | 35,464 |
| Biggest Cities in Japan | 0 | - | 4.66 | 74,883 |
| Biggest Cities in Russia | 0 | - | 4.49 | 75,914 |
| Biggest Cities in France | 0 | - | 4.76 | 197,563 |
| Biggest Cities in Spain | 0 | - | 4.50 | 152,199 |
| Biggest Cities in The Netherlands | 0 | - | 4.50 | 49,668 |
| Biggest Cities in Poland | 0 | - | 4.56 | 47,628 |
| Biggest Cities in the UK | 0 | - | 4.45 | 92,551 |
| Biggest Cities in China | 0 | - | 4.64 | 136,897 |
| Cities of Ireland | 0 | - | 4.43 | 39,436 |
| Biggest Cities in Canada | 0 | - | 4.67 | 119,546 |
| Biggest Cities in Switzerland | 0 | - | 4.52 | 43,251 |
| Biggest Cities in India | 0 | - | 4.72 | 61,924 |
| Biggest Cities in Italy | 0 | - | 4.65 | 215,362 |
| Biggest U.S. Cities A-Z | 0 | - | 4.59 | 121,659 |
| Capitals of the Most Populated Countries | 0 | - | 4.96 | 116,262 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.95 | 65,321 |
| Countries of Europe by Population | 0 | - | 4.98 | 124,501 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 243,352 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 108,200 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 89,472 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.93 | 64,387 |
| Most Populated Countries Bordering the Pacific Ocean | 0 | - | 4.97 | 78,254 |
| Most Populous Countries Bordering Each Other | 0 | - | 4.96 | 95,598 |
| Countries with the Most People Bordering Them | 0 | - | 4.95 | 74,430 |
| Populous Countries Bordering Smaller Countries | 0 | - | 4.97 | 92,558 |
| Densest Countries Bordering Each Other | 0 | - | 4.93 | 64,419 |
| Jewish Cities Quiz | 0 | - | 4.31 | 59,074 |
| Biggest Nordic Cities | 0 | - | 4.37 | 59,519 |
| First U.S. Cities to Reach 100,000 People | 0 | - | 4.70 | 55,999 |
| First U.S. States to Reach 1 Million People | 0 | - | 4.71 | 74,126 |
| Biggest Cities Near a Border | 0 | - | 4.20 | 27,787 |
| Biggest Cities by Trait #2 | 0 | - | 4.37 | 14,068 |
| Fastest Shrinking U.S. Cities | 0 | - | 4.45 | 28,577 |
| Flags to Largest Cities | 0 | - | 4.57 | 30,776 |
| Cities in Squares on a Map - North America | 0 | - | 4.36 | 19,203 |
| 100 Biggest Cities in New Zealand with a Map | 0 | - | 4.47 | 20,531 |
| Biggest Cities in Brazil | 0 | - | 4.55 | 48,036 |
| 100 Biggest Cities in Italy on a Map | 0 | - | 4.76 | 63,420 |
| All Cities in China with Population of 1 Million | 0 | - | 4.77 | 37,852 |
| All Cities in India with Population of 1 Million | 0 | - | 4.79 | 40,452 |
| Biggest Cities in New Zealand | 0 | - | 4.56 | 22,664 |
| Biggest U.S. Cities Starting with A | 0 | - | 4.36 | 82,827 |
| Biggest U.S. Cities Starting with B | 0 | - | 4.36 | 69,321 |
| Biggest U.S. Cities Starting with C | 0 | - | 4.28 | 77,630 |
| Biggest U.S. Cities Starting with D | 0 | - | 4.10 | 83,283 |
| Biggest U.S. Cities Starting with M | 0 | - | 4.15 | 65,744 |
| Biggest U.S. Cities Starting with N | 0 | - | 4.23 | 61,501 |
| Biggest U.S. Cities Starting with L | 0 | - | 4.22 | 59,766 |
| Biggest U.S. Cities Starting with S | 0 | - | 4.27 | 67,179 |
| Biggest Cities in North Carolina | 0 | - | 4.66 | 31,725 |
| Most Populous Countries in 2050 | 0 | - | 4.91 | 203,982 |
| First Countries to Reach 5 Million People | 0 | - | 4.90 | 108,816 |
| Most Populous Modern-Day Countries in 1000 AD | 0 | - | 4.85 | 68,187 |
| Most Populous Modern-Day Countries in 1 AD | 0 | - | 4.98 | 75,624 |
| Most Populous Modern-Day Countries in 1800 AD | 0 | - | 4.91 | 53,319 |
| Most Populous Modern-Day Countries in 1500 AD | 0 | - | 4.92 | 66,548 |
| Most Populous Modern-Day Countries by Century | 0 | - | 4.98 | 86,269 |
| Countries of the Soviet Union | 0 | - | 4.98 | 183,463 |
| Vietnam War Countries | 0 | - | 4.80 | 85,474 |
| Countries of the Italian Empire | 0 | - | 4.21 | 25,222 |
| Countries with the Highest Population Density | 0 | - | 4.93 | 142,798 |
| Countries with the Lowest Population Density | 0 | - | 4.97 | 139,164 |
| Top 10 Most Populous European Countries | 0 | - | 4.97 | 203,351 |
| Top 10 Most Populous Asian Countries | 0 | - | 4.96 | 159,374 |
| Top 10 Most Populous African Countries | 0 | - | 4.98 | 155,968 |
| Top 10 Most Densely-Populated Countries in Asia | 0 | - | 4.90 | 79,921 |
| Top 10 Asian Countries by Population Increase | 0 | - | 4.89 | 84,095 |
| Flags of Countries With More Than 100 Million People | 0 | - | 4.97 | 144,828 |
| Five Most Populated Countries on a Multicolored World Map | 0 | - | 4.97 | 63,783 |
| Biggest U.S. Cities Within 200 Kilometers | 0 | - | 4.37 | 36,812 |
| 100 Biggest U.S. Cities on a Map | 0 | - | 4.24 | 89,130 |
| Top 10 Most Populous U.S. State Capitals | 0 | - | 4.47 | 52,372 |
| Biggest Cities with a Tropical Climate | 0 | - | 4.40 | 29,834 |
| Largest Nordic Cities on a Map | 0 | - | 4.72 | 22,796 |
