| Biggest Cities in the World | 0 | - | 4.89 | 686,942 |
| Biggest City by Time Zone | 0 | - | 4.84 | 54,401 |
| Biggest City in Every Country | 0 | - | 4.97 | 78,821 |
| Five Most Populated Cities by Continent | 0 | - | 4.94 | 169,792 |
| Biggest Cities in the World - Extreme | 0 | - | 4.98 | 92,082 |
| 10 Biggest Cities That Aren't World Capitals | 0 | - | 4.95 | 96,233 |
| Biggest Cities with Exceptions | 0 | - | 4.91 | 64,922 |
| Biggest Cities in the Southern Hemisphere | 0 | - | 4.86 | 71,452 |
| Ten Biggest Cities by Hemisphere | 0 | - | 4.94 | 65,246 |
| Biggest Cities in Deserts | 0 | - | 4.94 | 42,369 |
| Most Populous Cities as a Percent of Their Continent | 0 | - | 4.91 | 59,707 |
| Ten Southernmost Megacities | 0 | - | 4.81 | 46,370 |
| 100 Biggest Cities on a World Map | 0 | - | 4.99 | 371,250 |
| Biggest Cities in the United States | 0 | - | 4.93 | 819,817 |
| Biggest Metro Areas in the USA | 0 | - | 4.98 | 333,958 |
| Biggest Spanish-Speaking Cities | 0 | - | 4.87 | 109,024 |
| Biggest Cities by Language | 0 | - | 4.95 | 213,931 |
| Biggest Cities in Europe, 1700 A.D. | 0 | - | 4.94 | 64,867 |
| Most Populous World Capitals | 0 | - | 4.92 | 148,500 |
| Biggest European Cities by Century | 0 | - | 4.98 | 118,816 |
| Megacities on a World Map | 0 | - | 4.98 | 220,714 |
| All 1M Cities by Proximity | 0 | - | 5.00 | 513,554 |
| 2,000 Biggest World Cities Furthest from a Larger City | 0 | - | 4.98 | 59,859 |
| All 3M Cities on the World Map | 0 | - | 4.95 | 63,443 |
| Every 1,000,000+ City on a Map | 0 | - | 4.99 | 84,363 |
| Biggest City in Each U.S. State | 0 | - | 4.85 | 151,228 |
| Biggest US Cities by Decade | 0 | - | 4.95 | 154,898 |
| Biggest Cities in Asia | 0 | - | 4.94 | 95,862 |
| Biggest Cities in Asia - Extreme | 0 | - | 4.91 | 43,447 |
| Megacities on an Empty Map | 0 | - | 4.95 | 87,559 |
| African Cities in the Top 200 Worldwide | 0 | - | 4.93 | 41,720 |
| Five Biggest World Cities by Letter #2 | 0 | - | 4.82 | 63,749 |
| Five Biggest World Cities by Letter #1 | 0 | - | 4.94 | 67,862 |
| 15 Largest Cities in Europe With a Map | 0 | - | 4.97 | 199,211 |
| 15 Largest Cities in Asia With a Map | 0 | - | 4.97 | 109,280 |
| 100 Biggest Cities in Europe with a Map | 0 | - | 4.97 | 304,106 |
| 250 Biggest Cities in Europe With a Map | 0 | - | 4.89 | 97,496 |
| Biggest Two-Word U.S. Cities | 0 | - | 4.48 | 97,542 |
| Biggest Cities by Trait #1 | 0 | - | 4.45 | 43,071 |
| Biggest City by Region | 0 | - | 4.49 | 33,647 |
| Most Populous 2nd Cities | 0 | - | 4.75 | 53,377 |
| Largest World Capitals with Exceptions | 0 | - | 4.72 | 50,363 |
| Two Largest Cities by First Two Letters | 0 | - | 4.58 | 76,626 |
| Ten Northernmost Megacities | 0 | - | 4.50 | 47,026 |
| Countries With More Than 100 Million People | 0 | - | 4.98 | 137,169 |
| Five Most Populated Countries by Hemisphere | 0 | - | 4.95 | 109,767 |
| Biggest Cities in the U.S. - Extreme | 0 | - | 4.93 | 131,678 |
| Biggest Cities in Germany - Extreme | 0 | - | 4.83 | 43,951 |
| 15 Largest Cities in the Middle East With a Map | 0 | - | 4.91 | 91,912 |
| Biggest Cities in Each U.S. State - Extreme | 0 | - | 4.91 | 69,481 |
| 500 Biggest US Cities | 0 | - | 4.87 | 98,127 |
| 100 Biggest Cities in North America on a Map | 0 | - | 4.81 | 52,372 |
| Biggest Cities in Europe | 0 | - | 4.75 | 464,473 |
| Biggest English-Speaking Cities | 0 | - | 4.42 | 136,207 |
| Biggest City by Island | 0 | - | 4.57 | 45,771 |
| Biggest Cities in History | 0 | - | 4.50 | 80,228 |
| Top 10 World Cities Through History | 0 | - | 4.43 | 67,965 |
| Biggest Cities once in the Spanish Empire | 0 | - | 4.88 | 50,933 |
| 15 Largest Cities in South America With a Map | 0 | - | 4.94 | 91,080 |
| Biggest World Cities within 1,000 Km | 0 | - | 4.49 | 40,131 |
| Biggest Cities in France - Extreme | 0 | - | 4.89 | 43,775 |
| Biggest World Cities in 1850 | 0 | - | 4.58 | 64,586 |
| Biggest Cities in Germany | 0 | - | 4.95 | 263,066 |
| Biggest Cities Starting With A | 0 | - | 4.55 | 112,218 |
| Biggest Cities Starting With D | 0 | - | 4.49 | 106,875 |
| Biggest Cities Starting With H | 0 | - | 4.55 | 97,661 |
| Biggest Cities Starting With L | 0 | - | 4.45 | 110,498 |
| Biggest Cities Starting With M | 0 | - | 4.50 | 128,833 |
| Biggest Cities Starting With P | 0 | - | 4.47 | 114,712 |
| Fastest Growing U.S. Cities | 0 | - | 4.36 | 70,191 |
| Second Biggest Cities Quiz | 0 | - | 4.25 | 38,982 |
| Biggest Coastal City by Country | 0 | - | 4.59 | 27,032 |
| Biggest City by Region #2 | 0 | - | 4.46 | 23,113 |
| Biggest Cities by Latitude | 0 | - | 4.76 | 26,246 |
| Northernmost Major City by Country | 0 | - | 4.56 | 30,870 |
| 10 Biggest Cities by U.S. State | 0 | - | 4.91 | 29,058 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 125,782 |
| Countries with Megacities | 0 | - | 4.99 | 197,055 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 171,409 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.97 | 97,859 |
| Countries With More than 200 Million People | 0 | - | 4.93 | 95,266 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 63,828 |
| Top 50 Countries by Population - In Order | 0 | - | 4.97 | 247,759 |
| Biggest Cities in Sweden | 0 | - | 4.82 | 37,240 |
| 100 Biggest Cities in Germany on a Map | 0 | - | 4.89 | 76,174 |
| Biggest Countries by Population | 0 | - | 4.99 | 1,311,120 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 349,567 |
| Largest World Cities With Four Letters | 0 | - | 4.41 | 43,241 |
| Biggest Cities in Europe - Extreme | 0 | - | 4.79 | 68,786 |
| Biggest Mediterranean Cities | 0 | - | 4.57 | 86,581 |
| European Cities in the Top 200 Worldwide | 0 | - | 4.63 | 36,863 |
| Cities of China (With Some Help) | 0 | - | 4.86 | 28,210 |
| Biggest Cities in the World - 2100 | 0 | - | 4.29 | 81,181 |
| Most Populous Second Cities in the U.S. | 0 | - | 4.30 | 39,814 |
| Biggest Cities Starting With B | 0 | - | 4.35 | 148,043 |
| Biggest Cities Starting With C | 0 | - | 4.07 | 96,998 |
| Biggest Cities Starting With K | 0 | - | 4.30 | 78,786 |
| Biggest Cities Starting With S | 0 | - | 4.39 | 114,671 |
| Biggest Cities Starting With T | 0 | - | 4.30 | 116,252 |
| Capitals of the Most Populated Countries | 0 | - | 4.96 | 116,973 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.94 | 66,092 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 244,994 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 109,000 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 89,933 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.93 | 69,546 |
| Biggest Cities with a Muslim Majority | 0 | - | 4.79 | 99,127 |
| Biggest Cities in Latin America Quiz | 0 | - | 4.44 | 60,377 |
| Biggest English Cities by Century | 0 | - | 4.90 | 99,581 |
| Five Biggest Cities by Country | 0 | - | 4.67 | 152,472 |
| Biggest Cities by Trait #2 | 0 | - | 4.38 | 14,177 |
| Flags to Largest Cities | 0 | - | 4.54 | 31,956 |
| Biggest World Cities A-Z | 0 | - | 4.55 | 193,925 |
| Most Populous Country by First Two Letters | 0 | - | 4.75 | 66,925 |
| Demographics Multiple Choice | 0 | - | 4.66 | 39,774 |
| Biggest European Cities by Letter | 0 | - | 4.66 | 118,970 |
| Biggest Cities in the Commonwealth of Nations | 0 | - | 4.65 | 62,931 |
| U.S. Cities With Population > 1 Million | 0 | - | 4.50 | 59,503 |
| U.S. States by Second Most Populous City | 0 | - | 4.42 | 40,330 |
| Biggest "Saint" Cities - United States | 0 | - | 4.46 | 33,980 |
| Biggest Cities in Australia on a Map | 0 | - | 4.61 | 32,948 |
| Countries of Europe by Population | 0 | - | 4.98 | 126,674 |
| Most Populated Countries Bordering the Pacific Ocean | 0 | - | 4.97 | 78,642 |
| Most Populous Countries Bordering Each Other | 0 | - | 4.96 | 96,552 |
| Countries with the Most People Bordering Them | 0 | - | 4.95 | 75,257 |
| Populous Countries Bordering Smaller Countries | 0 | - | 4.97 | 93,441 |
| Densest Countries Bordering Each Other | 0 | - | 4.93 | 69,899 |
| Jewish Cities Quiz | 0 | - | 4.31 | 59,261 |
| 100 Biggest US Cities in 1900 | 0 | - | 4.44 | 61,555 |
| Biggest U.S. Cities Within 100 Kilometers | 0 | - | 4.46 | 37,782 |
| Biggest Cities Near a Border | 0 | - | 4.22 | 28,447 |
| 100 Biggest Cities in Spain on a Map | 0 | - | 4.57 | 36,059 |
| Cities in Squares on a Map - North America | 0 | - | 4.36 | 19,371 |
| Biggest Cities in Japan | 0 | - | 4.66 | 75,598 |
| Biggest Cities in Russia | 0 | - | 4.49 | 76,404 |
| Biggest Cities in France | 0 | - | 4.76 | 199,562 |
| Biggest Cities in Spain | 0 | - | 4.50 | 153,545 |
| Biggest Cities in The Netherlands | 0 | - | 4.50 | 50,176 |
| Biggest Cities in Poland | 0 | - | 4.57 | 48,088 |
| Biggest Cities in the UK | 0 | - | 4.46 | 93,462 |
| Biggest Cities in China | 0 | - | 4.64 | 138,630 |
| Cities of Ireland | 0 | - | 4.43 | 39,733 |
| Biggest Cities in Canada | 0 | - | 4.66 | 120,438 |
| Biggest Cities in Switzerland | 0 | - | 4.52 | 43,574 |
| Biggest Cities in India | 0 | - | 4.72 | 62,395 |
| Biggest Cities in Italy | 0 | - | 4.65 | 217,176 |
| Biggest U.S. Cities Starting with A | 0 | - | 4.38 | 86,221 |
| Biggest U.S. Cities Starting with B | 0 | - | 4.38 | 72,457 |
| Biggest U.S. Cities Starting with C | 0 | - | 4.31 | 80,766 |
| Biggest U.S. Cities Starting with D | 0 | - | 4.11 | 86,162 |
| Biggest U.S. Cities Starting with M | 0 | - | 4.17 | 67,510 |
| Biggest U.S. Cities Starting with N | 0 | - | 4.25 | 63,178 |
| Biggest U.S. Cities Starting with L | 0 | - | 4.23 | 60,227 |
| Biggest U.S. Cities Starting with S | 0 | - | 4.27 | 67,631 |
| Biggest U.S. Cities A-Z | 0 | - | 4.63 | 122,127 |
| Most Populous Countries in 2050 | 0 | - | 4.91 | 205,225 |
| First Countries to Reach 5 Million People | 0 | - | 4.90 | 109,576 |
| Most Populous Modern-Day Countries in 1000 AD | 0 | - | 4.86 | 68,600 |
| Most Populous Modern-Day Countries in 1 AD | 0 | - | 4.97 | 76,121 |
| Most Populous Modern-Day Countries in 1800 AD | 0 | - | 4.91 | 53,664 |
| Most Populous Modern-Day Countries in 1500 AD | 0 | - | 4.92 | 66,932 |
| Most Populous Modern-Day Countries by Century | 0 | - | 4.98 | 86,927 |
| Countries with the Highest Population Density | 0 | - | 4.93 | 143,743 |
| Countries with the Lowest Population Density | 0 | - | 4.97 | 144,767 |
| 25 Biggest Cities of the Soviet Union | 0 | - | 4.97 | 77,967 |
| Boundary Waters | 0 | - | 4.93 | 81,107 |
| The Same Suffixes - Geography | 0 | - | 4.98 | 74,735 |
| Most Populous Islands | 0 | - | 4.71 | 112,716 |
| Islands by Largest City #1 | 0 | - | 4.48 | 82,052 |
| Top 10 Most Populous European Countries | 0 | - | 4.97 | 205,212 |
| Top 10 Most Populous Asian Countries | 0 | - | 4.96 | 160,862 |
| Top 10 Most Populous African Countries | 0 | - | 4.98 | 157,335 |
| Top 10 Most Densely-Populated Countries in Asia | 0 | - | 4.91 | 80,837 |
| Countries by Population Decrease | 0 | - | 4.43 | 46,538 |
| Top 10 Asian Countries by Population Increase | 0 | - | 4.90 | 84,735 |
| Flags of Countries With More Than 100 Million People | 0 | - | 4.97 | 145,864 |
| Countries Gaining the Most Population by 2070 | 0 | - | 4.55 | 49,467 |
| Five Most Populated Countries on a Multicolored World Map | 0 | - | 4.97 | 64,372 |
| Least Dense Countries Bordering Each Other | 0 | - | 4.97 | 5,809 |
| Biggest Nordic Cities | 0 | - | 4.38 | 59,667 |
| First U.S. Cities to Reach 100,000 People | 0 | - | 4.67 | 56,307 |
| First U.S. States to Reach 1 Million People | 0 | - | 4.71 | 74,529 |
| Biggest Cities with a Tropical Climate | 0 | - | 4.38 | 30,016 |
| Biggest Cities once in the Ottoman Empire | 0 | - | 4.79 | 42,470 |
| Fastest Shrinking U.S. Cities | 0 | - | 4.46 | 28,714 |
| 100 Biggest Cities in New Zealand with a Map | 0 | - | 4.47 | 20,715 |
| Biggest Cities in Brazil | 0 | - | 4.55 | 48,391 |
| 100 Biggest Cities in Italy on a Map | 0 | - | 4.76 | 64,533 |
| All Cities in China with Population of 1 Million | 0 | - | 4.79 | 38,635 |
| All Cities in India with Population of 1 Million | 0 | - | 4.79 | 40,979 |
| Biggest Cities in New Zealand | 0 | - | 4.56 | 22,765 |
| Most Populous Countries in 1900 | 0 | - | 4.92 | 162,056 |
| Biggest Cities in North Carolina | 0 | - | 4.66 | 31,951 |
| Countries of the World Quiz | 0 | - | 5.00 | 40,909,330 |
| Countries Along the Afro-Eurasia Coast | 0 | - | 4.82 | 30,108 |
| Top 15 Most Populous Countries Ending in "IA" | 0 | - | 4.75 | 93,098 |
| Biggest Countries by Population - Shape Quiz | 0 | - | 4.89 | 50,739 |
| Largest Cities in Alexander's Empire | 0 | - | 4.56 | 38,619 |
| Biggest U.S. Cities Within 200 Kilometers | 0 | - | 4.37 | 37,224 |
| 100 Biggest U.S. Cities on a Map | 0 | - | 4.25 | 91,300 |
| Top 10 Most Populous U.S. State Capitals | 0 | - | 4.47 | 52,608 |
