| Biggest Cities in the World | 0 | - | 4.89 | 676,829 |
| Biggest City by Time Zone | 0 | - | 4.82 | 53,139 |
| Biggest City in Every Country | 0 | - | 4.97 | 77,270 |
| Five Most Populated Cities by Continent | 0 | - | 4.95 | 166,761 |
| Biggest Cities in the World - Extreme | 0 | - | 4.98 | 90,602 |
| 10 Biggest Cities That Aren't World Capitals | 0 | - | 4.94 | 94,147 |
| Biggest Cities with Exceptions | 0 | - | 4.87 | 53,440 |
| Biggest Cities in the Southern Hemisphere | 0 | - | 4.85 | 69,874 |
| 100 Biggest Cities on a World Map | 0 | - | 4.99 | 366,573 |
| Ten Biggest Cities by Hemisphere | 0 | - | 4.94 | 63,982 |
| Biggest Cities in Deserts | 0 | - | 4.93 | 41,912 |
| Most Populous Cities as a Percent of Their Continent | 0 | - | 4.91 | 58,898 |
| Biggest Cities in the United States | 0 | - | 4.92 | 806,724 |
| Biggest Metro Areas in the USA | 0 | - | 4.98 | 320,352 |
| All 1M Cities by Proximity | 0 | - | 5.00 | 507,837 |
| Biggest Spanish-Speaking Cities | 0 | - | 4.87 | 108,028 |
| Biggest Cities by Language | 0 | - | 4.95 | 212,205 |
| Biggest Cities in Europe, 1700 A.D. | 0 | - | 4.95 | 64,409 |
| Most Populous World Capitals | 0 | - | 4.92 | 146,243 |
| Biggest European Cities by Century | 0 | - | 4.97 | 117,550 |
| Megacities on a World Map | 0 | - | 4.98 | 218,831 |
| 2,000 Biggest World Cities Furthest from a Larger City | 0 | - | 4.98 | 59,314 |
| All 3M Cities on the World Map | 0 | - | 4.95 | 62,583 |
| Every 1,000,000+ City on a Map | 0 | - | 4.99 | 82,664 |
| Biggest City in Each U.S. State | 0 | - | 4.84 | 149,769 |
| Biggest US Cities by Decade | 0 | - | 4.95 | 153,517 |
| Biggest Cities in Asia | 0 | - | 4.94 | 94,766 |
| Biggest Cities in Asia - Extreme | 0 | - | 4.91 | 42,834 |
| Megacities on an Empty Map | 0 | - | 4.96 | 86,649 |
| Biggest World Cities A-Z | 0 | - | 4.55 | 191,763 |
| Five Biggest World Cities by Letter #2 | 0 | - | 4.82 | 63,005 |
| Five Biggest World Cities by Letter #1 | 0 | - | 4.94 | 67,007 |
| 15 Largest Cities in Europe With a Map | 0 | - | 4.97 | 197,096 |
| 15 Largest Cities in Asia With a Map | 0 | - | 4.97 | 108,084 |
| 100 Biggest Cities in Europe with a Map | 0 | - | 4.97 | 300,845 |
| 250 Biggest Cities in Europe With a Map | 0 | - | 4.89 | 95,855 |
| Biggest Cities in the U.S. - Extreme | 0 | - | 4.93 | 130,315 |
| Biggest Cities in Germany - Extreme | 0 | - | 4.82 | 43,616 |
| 15 Largest Cities in the Middle East With a Map | 0 | - | 4.92 | 90,442 |
| Biggest Cities in Each U.S. State - Extreme | 0 | - | 4.91 | 68,714 |
| 500 Biggest US Cities | 0 | - | 4.84 | 95,926 |
| Biggest Two-Word U.S. Cities | 0 | - | 4.48 | 97,258 |
| Biggest Cities by Trait #1 | 0 | - | 4.44 | 42,839 |
| Biggest City by Region | 0 | - | 4.48 | 33,171 |
| Most Populous 2nd Cities | 0 | - | 4.72 | 52,926 |
| Largest World Capitals with Exceptions | 0 | - | 4.71 | 50,183 |
| Two Largest Cities by First Two Letters | 0 | - | 4.58 | 67,541 |
| Ten Northernmost Megacities | 0 | - | 4.49 | 46,778 |
| Ten Southernmost Megacities | 0 | - | 4.80 | 45,956 |
| Biggest Cities with a Muslim Majority | 0 | - | 4.79 | 98,353 |
| Biggest Cities in Europe | 0 | - | 4.78 | 454,246 |
| Biggest Cities once in the Spanish Empire | 0 | - | 4.87 | 50,464 |
| 15 Largest Cities in South America With a Map | 0 | - | 4.94 | 90,250 |
| Biggest Cities in France - Extreme | 0 | - | 4.88 | 42,811 |
| Biggest Cities in Germany | 0 | - | 4.94 | 260,400 |
| 10 Biggest Cities by U.S. State | 0 | - | 4.90 | 28,246 |
| Countries With More Than 100 Million People | 0 | - | 4.98 | 135,959 |
| Five Most Populated Countries by Hemisphere | 0 | - | 4.95 | 108,658 |
| Biggest English-Speaking Cities | 0 | - | 4.42 | 135,598 |
| Biggest City by Island | 0 | - | 4.57 | 45,577 |
| Biggest Cities in History | 0 | - | 4.49 | 79,317 |
| Top 10 World Cities Through History | 0 | - | 4.42 | 67,596 |
| Biggest World Cities within 1,000 Km | 0 | - | 4.50 | 39,803 |
| Biggest World Cities in 1850 | 0 | - | 4.58 | 64,251 |
| Biggest Cities in Sweden | 0 | - | 4.83 | 36,947 |
| 100 Biggest Cities in Germany on a Map | 0 | - | 4.89 | 74,405 |
| Biggest Cities Starting With A | 0 | - | 4.55 | 110,912 |
| Biggest Cities Starting With D | 0 | - | 4.48 | 106,029 |
| Biggest Cities Starting With H | 0 | - | 4.53 | 96,565 |
| Biggest Cities Starting With L | 0 | - | 4.44 | 109,395 |
| Biggest Cities Starting With M | 0 | - | 4.50 | 127,316 |
| Biggest Cities Starting With P | 0 | - | 4.46 | 113,355 |
| Fastest Growing U.S. Cities | 0 | - | 4.36 | 69,874 |
| Second Biggest Cities Quiz | 0 | - | 4.25 | 38,821 |
| Biggest Coastal City by Country | 0 | - | 4.59 | 26,944 |
| Biggest City by Region #2 | 0 | - | 4.45 | 22,823 |
| Biggest Cities by Latitude | 0 | - | 4.76 | 26,112 |
| Northernmost Major City by Country | 0 | - | 4.55 | 30,639 |
| Cities of China (With Some Help) | 0 | - | 4.86 | 27,955 |
| Jewish Cities Quiz | 0 | - | 4.31 | 59,050 |
| Largest World Cities With Four Letters | 0 | - | 4.43 | 43,018 |
| Biggest Cities in Europe - Extreme | 0 | - | 4.79 | 68,242 |
| Biggest Mediterranean Cities | 0 | - | 4.57 | 86,085 |
| European Cities in the Top 200 Worldwide | 0 | - | 4.64 | 36,406 |
| Biggest U.S. Cities A-Z | 0 | - | 4.59 | 121,592 |
| Biggest Countries by Population | 0 | - | 4.99 | 1,299,990 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 347,113 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 123,826 |
| Countries with Megacities | 0 | - | 4.99 | 194,247 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 169,001 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.97 | 96,637 |
| Countries With More than 200 Million People | 0 | - | 4.93 | 93,380 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.97 | 62,497 |
| Top 50 Countries by Population - In Order | 0 | - | 4.97 | 244,521 |
| Biggest Cities in Latin America Quiz | 0 | - | 4.46 | 59,921 |
| Biggest English Cities by Century | 0 | - | 4.89 | 98,687 |
| Five Biggest Cities by Country | 0 | - | 4.66 | 150,818 |
| Biggest Cities in the World - 2100 | 0 | - | 4.29 | 79,969 |
| Most Populous Second Cities in the U.S. | 0 | - | 4.30 | 39,734 |
| Biggest Cities Starting With B | 0 | - | 4.35 | 146,377 |
| Biggest Cities Starting With C | 0 | - | 4.07 | 96,026 |
| Biggest Cities Starting With K | 0 | - | 4.29 | 78,098 |
| Biggest Cities Starting With S | 0 | - | 4.39 | 113,641 |
| Biggest Cities Starting With T | 0 | - | 4.30 | 115,231 |
| Biggest Cities with a Tropical Climate | 0 | - | 4.40 | 29,804 |
| Capitals of the Most Populated Countries | 0 | - | 4.96 | 116,149 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.95 | 65,188 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 243,081 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 108,069 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 89,396 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.93 | 64,274 |
| Biggest European Cities by Letter | 0 | - | 4.64 | 117,978 |
| Biggest Cities in the Commonwealth of Nations | 0 | - | 4.59 | 62,678 |
| U.S. Cities With Population > 1 Million | 0 | - | 4.49 | 55,416 |
| U.S. States by Second Most Populous City | 0 | - | 4.44 | 39,988 |
| Biggest "Saint" Cities - United States | 0 | - | 4.46 | 33,747 |
| Biggest Cities by Trait #2 | 0 | - | 4.37 | 14,055 |
| 100 Biggest Cities in North America on a Map | 0 | - | 4.79 | 51,653 |
| Biggest Cities in Australia on a Map | 0 | - | 4.61 | 32,449 |
| 25 Biggest Cities of the Soviet Union | 0 | - | 4.96 | 70,183 |
| 100 Biggest US Cities in 1900 | 0 | - | 4.43 | 61,203 |
| Biggest U.S. Cities Within 100 Kilometers | 0 | - | 4.46 | 37,599 |
| 100 Biggest Cities in Spain on a Map | 0 | - | 4.57 | 35,372 |
| Biggest Cities in Japan | 0 | - | 4.65 | 74,805 |
| Biggest Cities in Russia | 0 | - | 4.49 | 75,828 |
| Biggest Cities in France | 0 | - | 4.76 | 197,039 |
| Biggest Cities in Spain | 0 | - | 4.50 | 151,988 |
| Biggest Cities in The Netherlands | 0 | - | 4.50 | 49,589 |
| Biggest Cities in Poland | 0 | - | 4.56 | 47,533 |
| Biggest Cities in the UK | 0 | - | 4.45 | 92,390 |
| Biggest Cities in China | 0 | - | 4.64 | 136,433 |
| Cities of Ireland | 0 | - | 4.43 | 39,393 |
| Biggest Cities in Canada | 0 | - | 4.67 | 119,396 |
| Biggest Cities in Switzerland | 0 | - | 4.52 | 43,213 |
| Biggest Cities in India | 0 | - | 4.71 | 61,847 |
| Biggest Cities in Italy | 0 | - | 4.65 | 215,049 |
| Countries of Europe by Population | 0 | - | 4.98 | 124,160 |
| Most Populous Country by First Two Letters | 0 | - | 4.72 | 66,350 |
| Demographics Multiple Choice | 0 | - | 4.66 | 39,512 |
| Most Populated Countries Bordering the Pacific Ocean | 0 | - | 4.97 | 78,126 |
| Most Populous Countries Bordering Each Other | 0 | - | 4.96 | 95,395 |
| Countries with the Most People Bordering Them | 0 | - | 4.95 | 74,266 |
| Populous Countries Bordering Smaller Countries | 0 | - | 4.97 | 92,421 |
| Densest Countries Bordering Each Other | 0 | - | 4.93 | 64,293 |
| First U.S. Cities to Reach 100,000 People | 0 | - | 4.70 | 55,946 |
| First U.S. States to Reach 1 Million People | 0 | - | 4.71 | 74,069 |
| Biggest Cities Near a Border | 0 | - | 4.22 | 27,130 |
| Biggest Cities once in the Ottoman Empire | 0 | - | 4.79 | 42,345 |
| Flags to Largest Cities | 0 | - | 4.57 | 30,681 |
| Cities in Squares on a Map - North America | 0 | - | 4.36 | 19,159 |
| Biggest Cities in Brazil | 0 | - | 4.55 | 47,981 |
| 100 Biggest Cities in Italy on a Map | 0 | - | 4.74 | 63,255 |
| All Cities in China with Population of 1 Million | 0 | - | 4.77 | 37,739 |
| All Cities in India with Population of 1 Million | 0 | - | 4.79 | 40,332 |
| Biggest U.S. Cities Starting with A | 0 | - | 4.36 | 82,735 |
| Biggest U.S. Cities Starting with B | 0 | - | 4.36 | 69,242 |
| Biggest U.S. Cities Starting with C | 0 | - | 4.28 | 77,542 |
| Biggest U.S. Cities Starting with D | 0 | - | 4.10 | 83,213 |
| Biggest U.S. Cities Starting with M | 0 | - | 4.15 | 65,696 |
| Biggest U.S. Cities Starting with N | 0 | - | 4.23 | 61,443 |
| Biggest U.S. Cities Starting with L | 0 | - | 4.22 | 59,724 |
| Biggest U.S. Cities Starting with S | 0 | - | 4.27 | 67,123 |
| Most Populous Countries in 2050 | 0 | - | 4.91 | 203,671 |
| First Countries to Reach 5 Million People | 0 | - | 4.90 | 108,700 |
| Most Populous Modern-Day Countries in 1000 AD | 0 | - | 4.85 | 68,112 |
| Most Populous Modern-Day Countries in 1 AD | 0 | - | 4.98 | 75,537 |
| Most Populous Modern-Day Countries in 1800 AD | 0 | - | 4.91 | 53,262 |
| Most Populous Modern-Day Countries in 1500 AD | 0 | - | 4.92 | 66,478 |
| Most Populous Modern-Day Countries by Century | 0 | - | 4.98 | 86,163 |
| Countries with the Most Christians | 0 | - | 4.93 | 105,802 |
| Least Christian Countries with Exceptions | 0 | - | 4.89 | 71,290 |
| Countries with the Highest Population Density | 0 | - | 4.93 | 142,638 |
| Countries with the Lowest Population Density | 0 | - | 4.97 | 138,984 |
| Countries Closest to United States A-Z | 0 | - | 4.86 | 106,114 |
| Countries Closest to Spain A-Z | 0 | - | 4.99 | 98,752 |
| Countries Closest to the United Kingdom A-Z | 0 | - | 4.96 | 175,405 |
| Top 10 Most Populous European Countries | 0 | - | 4.97 | 203,072 |
| Top 10 Most Populous Asian Countries | 0 | - | 4.96 | 159,156 |
| Top 10 Most Populous African Countries | 0 | - | 4.98 | 155,762 |
| Top 10 Most Densely-Populated Countries in Asia | 0 | - | 4.90 | 79,825 |
| Top 10 Asian Countries by Population Increase | 0 | - | 4.89 | 83,729 |
| Flags of Countries With More Than 100 Million People | 0 | - | 4.97 | 144,649 |
| Five Most Populated Countries on a Multicolored World Map | 0 | - | 4.97 | 63,667 |
| Biggest Nordic Cities | 0 | - | 4.37 | 59,495 |
| Fastest Shrinking U.S. Cities | 0 | - | 4.45 | 28,559 |
| 100 Biggest Cities in New Zealand with a Map | 0 | - | 4.47 | 20,498 |
| Biggest Cities in New Zealand | 0 | - | 4.56 | 22,639 |
| Most Populous Countries in 1900 | 0 | - | 4.92 | 160,956 |
| Divided World City Name Puzzle #1 | 0 | - | 4.90 | 39,163 |
| Capitals of Countries with the Biggest Economies | 0 | - | 4.93 | 87,782 |
| Countries with the Most Catholics | 0 | - | 4.91 | 91,677 |
| Orthodox Countries | 0 | - | 4.91 | 115,844 |
| Battle to Country | 0 | - | 4.92 | 34,679 |
| Monarchies of Europe | 0 | - | 4.88 | 86,079 |
| Monarchies of Asia | 0 | - | 4.95 | 53,515 |
| Five Countries with Most Christians by Continent | 0 | - | 4.99 | 96,835 |
| Most Populous Islands | 0 | - | 4.71 | 111,881 |
| Islands by Largest City #1 | 0 | - | 4.48 | 81,918 |
| Countries by Population Decrease | 0 | - | 4.43 | 46,225 |
| Countries Gaining the Most Population by 2070 | 0 | - | 4.55 | 48,941 |
