| Biggest Cities in the World | 0 | - | 4.91 | 796,369 |
| Capitals of the Most Populated Countries | 0 | - | 4.96 | 127,694 |
| Biggest City by Time Zone | 0 | - | 4.88 | 67,428 |
| Biggest City in Every Country | 0 | - | 4.98 | 99,843 |
| Five Most Populated Cities by Continent | 0 | - | 4.92 | 224,019 |
| Biggest Cities in the World - Extreme | 0 | - | 4.98 | 109,836 |
| Biggest Cities That Aren't World Capitals | 0 | - | 4.95 | 132,682 |
| Biggest Cities with Exceptions | 0 | - | 4.90 | 79,324 |
| Biggest Cities in the Southern Hemisphere | 0 | - | 4.87 | 84,166 |
| 100 Biggest Cities on a World Map | 0 | - | 4.99 | 416,366 |
| Ten Biggest Cities by Hemisphere | 0 | - | 4.96 | 79,404 |
| Biggest Cities in Deserts | 0 | - | 4.97 | 53,638 |
| Most Populous Cities as a Percent of Their Continent | 0 | - | 4.91 | 69,739 |
| Ten Southernmost Megacities | 0 | - | 4.85 | 57,198 |
| 100 Biggest Cities in the World with Exceptions | 0 | - | 4.98 | 67,330 |
| Biggest Cities in 4 Random Countries on a Map | 0 | - | 4.99 | 129,778 |
| Biggest Cities in the United States | 0 | - | 4.93 | 975,179 |
| Biggest Metro Areas in the USA | 0 | - | 4.98 | 365,465 |
| Countries of Europe by Population | 0 | - | 4.98 | 180,055 |
| Biggest Spanish-Speaking Cities | 0 | - | 4.91 | 127,990 |
| Biggest Cities by Language | 0 | - | 4.96 | 245,936 |
| Largest City by Island | 0 | - | 4.87 | 71,636 |
| Biggest Cities in Europe in 1700 | 0 | - | 4.93 | 70,757 |
| Most Populous World Capitals | 0 | - | 4.94 | 175,621 |
| Biggest European Cities by Century | 0 | - | 4.99 | 145,210 |
| Megacities on a World Map | 0 | - | 4.98 | 253,218 |
| All 1M Cities by Proximity | 0 | - | 5.00 | 576,851 |
| 2,000 Biggest World Cities Furthest from a Larger City | 0 | - | 4.98 | 67,187 |
| All 3M Cities on the World Map | 0 | - | 4.95 | 74,649 |
| Every 1,000,000+ City on a Map | 0 | - | 4.99 | 114,141 |
| Biggest City in Each U.S. State | 0 | - | 4.85 | 168,036 |
| Countries With More Than 100 Million People | 0 | - | 4.99 | 165,621 |
| Five Most Populated Countries by Hemisphere | 0 | - | 4.97 | 123,847 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 328,681 |
| 100 Biggest Cities in Europe with a Map | 0 | - | 4.97 | 344,634 |
| Top 10 Most Populous European Countries | 0 | - | 4.97 | 232,383 |
| Top 10 Most Populous Asian Countries | 0 | - | 4.96 | 183,462 |
| Top 10 Most Populous African Countries | 0 | - | 4.99 | 192,981 |
| Top 10 Most Densely-Populated Countries in Asia | 0 | - | 4.92 | 103,597 |
| Top 10 Asian Countries by Population Increase | 0 | - | 4.93 | 108,325 |
| Biggest US Cities by Decade | 0 | - | 4.95 | 167,705 |
| Biggest Cities in Asia | 0 | - | 4.95 | 116,591 |
| Biggest Cities in Asia - Extreme | 0 | - | 4.92 | 49,875 |
| Megacities on an Empty Map | 0 | - | 4.97 | 118,049 |
| African Cities in the Top 200 Worldwide | 0 | - | 4.95 | 50,774 |
| Five Biggest Cities by Country - Extreme | 0 | - | 4.96 | 41,334 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 172,906 |
| Countries with Megacities | 0 | - | 4.99 | 257,150 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 198,768 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 112,922 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 137,065 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 80,929 |
| Five Biggest World Cities by Letter #2 | 0 | - | 4.83 | 68,782 |
| Five Biggest World Cities by Letter #1 | 0 | - | 4.95 | 73,378 |
| 15 Largest Cities in Europe With a Map | 0 | - | 4.98 | 223,818 |
| 15 Largest Cities in Asia With a Map | 0 | - | 4.98 | 136,466 |
| 250 Biggest Cities in Europe With a Map | 0 | - | 4.91 | 114,892 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,442,831 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 379,604 |
| Second Biggest Cities by Country | 0 | - | 4.43 | 59,378 |
| Biggest Two-Word U.S. Cities | 0 | - | 4.50 | 102,041 |
| Biggest Cities by Trait #1 | 0 | - | 4.50 | 55,910 |
| Biggest City by Region | 0 | - | 4.50 | 36,117 |
| Most Populous 2nd Cities | 0 | - | 4.75 | 57,047 |
| Biggest Cities in the U.S. - Extreme | 0 | - | 4.96 | 158,995 |
| 15 Largest Cities in North America With a Map | 0 | - | 4.98 | 47,028 |
| 15 Largest Cities in the Middle East With a Map | 0 | - | 4.92 | 118,092 |
| Northernmost Major City by Country | 0 | - | 4.56 | 33,145 |
| Largest World Capitals with Exceptions | 0 | - | 4.63 | 52,318 |
| Two Largest Cities by First Two Letters | 0 | - | 4.53 | 83,154 |
| Biggest Cities in Each U.S. State - Extreme | 0 | - | 4.93 | 79,209 |
| 10 Biggest Cities by U.S. State | 0 | - | 4.95 | 41,540 |
| 500 Biggest U.S. Urban Areas | 0 | - | 4.90 | 116,433 |
| 100 Biggest Cities in North America on a Map | 0 | - | 4.84 | 62,015 |
| Ten Northernmost Megacities | 0 | - | 4.50 | 49,356 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.95 | 86,517 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 267,338 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 121,647 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,244 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 93,333 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 58,890 |
| Biggest Cities in Europe | 0 | - | 4.72 | 545,213 |
| Biggest English-Speaking Cities | 0 | - | 4.44 | 152,023 |
| Biggest Cities in History | 0 | - | 4.52 | 89,987 |
| Top 10 World Cities Through History | 0 | - | 4.43 | 75,336 |
| Biggest Cities once in the Spanish Empire | 0 | - | 4.87 | 55,942 |
| 15 Largest Cities in South America With a Map | 0 | - | 4.95 | 125,597 |
| Biggest World Cities within 1,000 Km | 0 | - | 4.53 | 43,349 |
| Biggest Cities in France - Extreme | 0 | - | 4.87 | 56,485 |
| Biggest World Cities in 1850 | 0 | - | 4.61 | 68,378 |
| Biggest Cities in the Blue Banana | 0 | - | 4.56 | 36,290 |
| Biggest Cities in Germany | 0 | - | 4.95 | 292,905 |
| Biggest Cities Starting With A | 0 | - | 4.62 | 124,095 |
| Biggest Cities Starting With D | 0 | - | 4.52 | 116,435 |
| Biggest Cities Starting With H | 0 | - | 4.54 | 109,174 |
| Biggest Cities Starting With L | 0 | - | 4.44 | 122,494 |
| Biggest Cities Starting With M | 0 | - | 4.48 | 143,082 |
| Biggest Cities Starting With P | 0 | - | 4.46 | 126,847 |
| Most Populous Countries by Year | 0 | - | 4.83 | 110,344 |
| Most Populous Country by First Two Letters | 0 | - | 4.70 | 70,790 |
| Demographics Multiple Choice | 0 | - | 4.70 | 42,205 |
| Most Populated Countries Bordering the Pacific Ocean | 0 | - | 4.97 | 95,488 |
| Most Populous Countries Bordering Each Other | 0 | - | 4.97 | 130,178 |
| Countries with the Most People Bordering Them | 0 | - | 4.98 | 107,672 |
| Populous Countries Bordering Smaller Countries | 0 | - | 4.97 | 112,950 |
| Densest Countries Bordering Each Other | 0 | - | 4.93 | 90,130 |
| Countries with a Population Under 1 Million by Clue | 0 | - | 4.99 | 92,811 |
| Fastest Growing U.S. Cities | 0 | - | 4.35 | 72,998 |
| Biggest Coastal City by Country | 0 | - | 4.61 | 28,027 |
| Biggest City by Region #2 | 0 | - | 4.43 | 24,752 |
| Biggest Cities by Latitude Range | 0 | - | 4.78 | 27,531 |
| Biggest Cities by Trait #2 | 0 | - | 4.46 | 20,513 |
| 100 Biggest Cities in Italy on a Map | 0 | - | 4.88 | 95,572 |
| All Cities in China with Population of 1 Million | 0 | - | 4.81 | 45,924 |
| Biggest Cities in Sweden | 0 | - | 4.85 | 41,129 |
| 100 Biggest Cities in Germany on a Map | 0 | - | 4.92 | 98,284 |
| All Cities in India with Population of 1 Million | 0 | - | 4.83 | 47,457 |
| Every 100k+ City in the United States on a Map | 0 | - | 4.97 | 113,803 |
| Most Populous Countries in 2050 | 0 | - | 4.91 | 222,700 |
| First Countries to Reach 5 Million People | 0 | - | 4.92 | 135,073 |
| Most Populous Modern-Day Countries in 1000 AD | 0 | - | 4.88 | 76,050 |
| Most Populous Modern-Day Countries in 1 AD | 0 | - | 4.98 | 92,353 |
| Most Populous Modern-Day Countries in 1800 AD | 0 | - | 4.93 | 67,145 |
| Most Populous Modern-Day Countries in 1500 AD | 0 | - | 4.93 | 73,422 |
| Most Populous Modern-Day Countries by Century | 0 | - | 4.98 | 97,052 |
| Countries with the Highest Population Density | 0 | - | 4.95 | 164,753 |
| Countries with the Lowest Population Density | 0 | - | 4.98 | 169,871 |
| Biggest Cities in Europe - Extreme | 0 | - | 4.73 | 73,377 |
| Biggest Mediterranean Cities | 0 | - | 4.61 | 91,229 |
| European Cities in the Top 200 Worldwide | 0 | - | 4.68 | 63,155 |
| Cities of China (With Some Help) | 0 | - | 4.90 | 31,488 |
| Most Populous Islands | 0 | - | 4.80 | 122,764 |
| Islands by Largest City #1 | 0 | - | 4.47 | 94,273 |
| Islands by Largest City #2 | 0 | - | 4.74 | 35,496 |
| Countries by Population Decrease | 0 | - | 4.46 | 49,757 |
| Flags of Countries With More Than 100 Million People | 0 | - | 4.97 | 159,011 |
| Countries Gaining the Most Population by 2070 | 0 | - | 4.63 | 64,113 |
| Five Most Populated Countries on a Multicolored World Map | 0 | - | 4.98 | 73,642 |
| Least Dense Countries Bordering Each Other | 0 | - | 4.84 | 23,290 |
| Biggest Cities with a Muslim Majority | 0 | - | 4.70 | 107,629 |
| Biggest Cities in Latin America | 0 | - | 4.47 | 64,659 |
| Biggest English Cities by Century | 0 | - | 4.90 | 106,148 |
| Five Biggest Cities by Country | 0 | - | 4.69 | 166,324 |
| Biggest Cities Near a Border | 0 | - | 4.22 | 31,862 |
| Flags to Largest Cities | 0 | - | 4.54 | 51,229 |
| Most Populous Second Cities in the U.S. | 0 | - | 4.30 | 40,910 |
| Biggest World Cities A-Z | 0 | - | 4.63 | 222,677 |
| Biggest Cities Starting With B | 0 | - | 4.34 | 162,472 |
| Biggest Cities Starting With C | 0 | - | 4.11 | 105,149 |
| Biggest Cities Starting With K | 0 | - | 4.31 | 86,967 |
| Biggest Cities Starting With S | 0 | - | 4.40 | 126,334 |
| Biggest Cities Starting With T | 0 | - | 4.29 | 128,025 |
| Most Populous Countries in 1900 | 0 | - | 4.91 | 173,559 |
| Biggest Cities in the Sun Belt on a Map | 0 | - | 4.68 | 23,579 |
| Boundary Waters | 0 | - | 4.92 | 88,364 |
| Countries Along the Afro-Eurasia Coast | 0 | - | 4.85 | 35,062 |
| The Same Suffixes - Geography | 0 | - | 4.98 | 95,884 |
| 100 Geography Questions of Varying Difficulty | 0 | - | 4.94 | 62,128 |
| "Second Best" Geography Edition #2 | 0 | - | 4.88 | 60,307 |
| Biggest Countries by Population - Shape Quiz | 0 | - | 4.91 | 57,304 |
| Total United States Immigration by Country | 0 | - | 4.91 | 111,298 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 243,142 |
| Top 15 Most Populous Countries Ending in "IA" | 0 | - | 4.77 | 115,484 |
| Biggest European Cities by Letter | 0 | - | 4.54 | 126,534 |
| Biggest Cities in the Commonwealth of Nations | 0 | - | 4.56 | 65,442 |
| Largest World Cities With Four Letters | 0 | - | 4.36 | 51,158 |
| Biggest Cities in Germany - Extreme | 0 | - | 4.78 | 46,952 |
| U.S. Cities With Population > 1 Million | 0 | - | 4.47 | 84,792 |
| U.S. States by Second Most Populous City | 0 | - | 4.42 | 43,903 |
| Biggest "Saint" Cities - United States | 0 | - | 4.46 | 36,770 |
| Biggest Cities with a Tropical Climate | 0 | - | 4.38 | 31,982 |
| Fastest Shrinking U.S. Cities | 0 | - | 4.44 | 40,334 |
| Most Populous U.S. Cities as a Percent of Their State | 0 | - | 4.78 | 55,104 |
| Cities in European Economic Areas on a Map | 0 | - | 4.69 | 17,460 |
| Biggest Cities in Australia on a Map | 0 | - | 4.61 | 37,821 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,311,129 |
| Landlocked Countries | 0 | - | 4.99 | 418,546 |
| Countries Losing the Most Population by 2070 | 0 | - | 4.40 | 84,404 |
| Jewish Cities Quiz | 0 | - | 4.34 | 61,771 |
| 25 Biggest Cities of the Soviet Union | 0 | - | 4.94 | 84,336 |
| 100 Biggest US Cities in 1900 | 0 | - | 4.45 | 73,005 |
| Biggest U.S. Cities Within 200 Kilometers | 0 | - | 4.41 | 48,727 |
| Biggest U.S. Cities Within 100 Kilometers | 0 | - | 4.42 | 51,465 |
| 100 Biggest Cities in Spain on a Map | 0 | - | 4.59 | 43,817 |
| Cities in Squares on a Map - North America | 0 | - | 4.30 | 21,429 |
| Largest Nordic Cities on a Map | 0 | - | 4.77 | 37,003 |
| Cities on Interstate 90 on a Map | 0 | - | 4.45 | 32,107 |
| Biggest Urban Areas in the UK | 0 | - | 4.42 | 176,177 |
| Biggest Cities in Japan | 0 | - | 4.69 | 82,899 |
| Biggest Cities in Russia | 0 | - | 4.49 | 82,290 |
| Biggest Cities in France | 0 | - | 4.70 | 223,538 |
| Biggest Cities in Spain | 0 | - | 4.63 | 170,799 |
| Biggest Cities in The Netherlands | 0 | - | 4.50 | 55,888 |
| Biggest Cities in Poland | 0 | - | 4.63 | 53,778 |
| Biggest Cities in the UK | 0 | - | 4.48 | 105,053 |
| Biggest Cities in China | 0 | - | 4.52 | 158,181 |
| Biggest Cities in Canada | 0 | - | 4.54 | 132,650 |
| Biggest Cities in Switzerland | 0 | - | 4.52 | 47,156 |
| Biggest Cities in India | 0 | - | 4.63 | 67,642 |
| Biggest Cities in Italy | 0 | - | 4.77 | 240,696 |
