| Biggest Cities in the World | 0 | - | 4.91 | 805,883 |
| 100 Biggest Cities on a World Map | 0 | - | 4.99 | 420,745 |
| Biggest Cities in the United States | 0 | - | 4.94 | 987,443 |
| Biggest Metro Areas in the USA | 0 | - | 4.98 | 368,127 |
| Biggest U.S. Cities A-Z | 0 | - | 4.68 | 139,617 |
| Biggest City by Time Zone | 0 | - | 4.88 | 68,968 |
| Biggest City in Every Country | 0 | - | 4.98 | 102,003 |
| Biggest Cities by Latitude Range | 0 | - | 4.81 | 32,826 |
| Five Most Populated Cities by Continent | 0 | - | 4.92 | 227,498 |
| Biggest Cities in the World - Extreme | 0 | - | 4.98 | 111,507 |
| Biggest Cities That Aren't World Capitals | 0 | - | 4.94 | 150,116 |
| Biggest Cities with Exceptions | 0 | - | 4.90 | 80,819 |
| Biggest Cities in the Southern Hemisphere | 0 | - | 4.87 | 85,271 |
| Ten Biggest Cities by Hemisphere | 0 | - | 4.96 | 80,993 |
| Biggest Cities in Deserts | 0 | - | 4.97 | 60,644 |
| Most Populous Cities as a Percent of Their Continent | 0 | - | 4.92 | 70,747 |
| Ten Southernmost Megacities | 0 | - | 4.84 | 65,235 |
| 100 Biggest Cities in the World with Exceptions | 0 | - | 4.98 | 68,429 |
| Biggest Cities in Germany | 0 | - | 4.95 | 295,309 |
| Cities of China (With Some Help) | 0 | - | 4.91 | 31,790 |
| Biggest Spanish-Speaking Cities | 0 | - | 4.91 | 129,632 |
| Biggest Cities by Language | 0 | - | 4.96 | 247,708 |
| Largest City by Island | 0 | - | 4.87 | 72,472 |
| Biggest Cities in Europe in 1700 | 0 | - | 4.93 | 71,438 |
| Most Populous World Capitals | 0 | - | 4.94 | 176,723 |
| Biggest European Cities by Century | 0 | - | 4.99 | 146,169 |
| Megacities on a World Map | 0 | - | 4.98 | 257,045 |
| All 1M Cities by Proximity | 0 | - | 5.00 | 582,151 |
| 2,000 Biggest World Cities Furthest from a Larger City | 0 | - | 4.98 | 67,784 |
| All 3M Cities on the World Map | 0 | - | 4.95 | 75,713 |
| Every 1,000,000+ City on a Map | 0 | - | 4.99 | 116,510 |
| 100 Biggest Cities in Italy on a Map | 0 | - | 4.89 | 97,465 |
| All Cities in China with Population of 1 Million | 0 | - | 4.82 | 46,615 |
| 100 Biggest Cities in Germany on a Map | 0 | - | 4.92 | 100,111 |
| Biggest U.S. Cities Starting with A | 0 | - | 4.43 | 110,616 |
| Biggest U.S. Cities Starting with B | 0 | - | 4.42 | 94,563 |
| Biggest City in Each U.S. State | 0 | - | 4.87 | 169,714 |
| Biggest US Cities by Decade | 0 | - | 4.95 | 169,014 |
| Biggest Cities in Asia | 0 | - | 4.95 | 118,205 |
| Biggest Cities in Asia - Extreme | 0 | - | 4.92 | 50,444 |
| 100 Biggest Cities in Europe with a Map | 0 | - | 4.97 | 348,864 |
| Megacities on an Empty Map | 0 | - | 4.97 | 119,250 |
| African Cities in the Top 200 Worldwide | 0 | - | 4.95 | 51,532 |
| Five Biggest World Cities by Letter #2 | 0 | - | 4.84 | 69,324 |
| Five Biggest World Cities by Letter #1 | 0 | - | 4.95 | 73,989 |
| 15 Largest Cities in Europe With a Map | 0 | - | 4.98 | 225,841 |
| 15 Largest Cities in Asia With a Map | 0 | - | 4.98 | 137,765 |
| 250 Biggest Cities in Europe With a Map | 0 | - | 4.91 | 116,533 |
| Biggest U.S. Cities Starting with C | 0 | - | 4.36 | 102,583 |
| Biggest U.S. Cities Starting with D | 0 | - | 4.16 | 107,805 |
| Biggest U.S. Cities Starting with M | 0 | - | 4.16 | 85,852 |
| Biggest U.S. Cities Starting with N | 0 | - | 4.17 | 80,896 |
| Biggest U.S. Cities Starting with O | 0 | - | 4.39 | 33,932 |
| Biggest U.S. Cities Starting with P | 0 | - | 4.03 | 67,692 |
| Biggest U.S. Cities Starting with L | 0 | - | 4.28 | 73,701 |
| Biggest U.S. Cities Starting with S | 0 | - | 4.35 | 81,919 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 335,681 |
| Biggest Cities in the U.S. - Extreme | 0 | - | 4.95 | 160,106 |
| 15 Largest Cities in North America With a Map | 0 | - | 4.98 | 48,069 |
| 15 Largest Cities in the Middle East With a Map | 0 | - | 4.92 | 119,359 |
| Biggest Cities in Each U.S. State - Extreme | 0 | - | 4.91 | 84,720 |
| 10 Biggest Cities by U.S. State | 0 | - | 4.95 | 42,475 |
| 500 Biggest U.S. Urban Areas | 0 | - | 4.90 | 118,251 |
| 100 Biggest Cities in North America on a Map | 0 | - | 4.84 | 62,946 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,454,527 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 382,591 |
| Countries With More Than 100 Million People | 0 | - | 4.99 | 167,026 |
| Five Most Populated Countries by Hemisphere | 0 | - | 4.97 | 125,047 |
| Biggest European Cities by Letter | 0 | - | 4.55 | 127,483 |
| Biggest Cities once in the Spanish Empire | 0 | - | 4.87 | 56,542 |
| 15 Largest Cities in South America With a Map | 0 | - | 4.95 | 127,558 |
| Biggest Cities in France - Extreme | 0 | - | 4.87 | 57,466 |
| Biggest Cities in Australia on a Map | 0 | - | 4.62 | 38,201 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 175,239 |
| Countries with Megacities | 0 | - | 4.99 | 267,288 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 200,920 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 114,180 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 139,241 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 82,291 |
| Biggest Cities in Europe | 0 | - | 4.73 | 549,268 |
| Second Biggest Cities by Country | 0 | - | 4.43 | 60,132 |
| Biggest Two-Word U.S. Cities | 0 | - | 4.50 | 102,657 |
| Biggest Cities by Trait #1 | 0 | - | 4.50 | 56,165 |
| Biggest City by Region | 0 | - | 4.50 | 36,396 |
| Most Populous 2nd Cities | 0 | - | 4.75 | 57,344 |
| Northernmost Major City by Country | 0 | - | 4.57 | 33,310 |
| Largest World Capitals with Exceptions | 0 | - | 4.64 | 52,446 |
| Two Largest Cities by First Two Letters | 0 | - | 4.52 | 83,570 |
| Ten Northernmost Megacities | 0 | - | 4.50 | 49,577 |
| Biggest Urban Areas in the UK | 0 | - | 4.43 | 176,745 |
| Biggest Cities in France | 0 | - | 4.70 | 225,370 |
| Biggest Cities in Spain | 0 | - | 4.64 | 172,224 |
| Biggest Cities in the UK | 0 | - | 4.48 | 105,854 |
| Biggest Cities in China | 0 | - | 4.53 | 159,933 |
| Biggest Cities in Sweden | 0 | - | 4.85 | 41,463 |
| All Cities in India with Population of 1 Million | 0 | - | 4.84 | 48,032 |
| Biggest Cities in Italy | 0 | - | 4.77 | 242,467 |
| Random Sequential Countries on the World Map | 0 | - | 5.00 | 526,344 |
| Capitals of the Most Populated Countries | 0 | - | 4.96 | 128,480 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.96 | 87,354 |
| Countries of Europe by Population | 0 | - | 4.98 | 183,214 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 269,226 |
| Most Populous Countries by Year | 0 | - | 4.83 | 111,451 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 122,700 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,920 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.90 | 94,246 |
| Most Populated Countries Bordering the Pacific Ocean | 0 | - | 4.97 | 95,926 |
| Most Populous Countries Bordering Each Other | 0 | - | 4.97 | 131,394 |
| Countries with the Most People Bordering Them | 0 | - | 4.98 | 108,710 |
| Populous Countries Bordering Smaller Countries | 0 | - | 4.97 | 113,778 |
| Densest Countries Bordering Each Other | 0 | - | 4.93 | 90,911 |
| Biggest English-Speaking Cities | 0 | - | 4.45 | 165,898 |
| Biggest English Cities by Century | 0 | - | 4.91 | 107,022 |
| Biggest Cities in History | 0 | - | 4.52 | 90,619 |
| Top 10 World Cities Through History | 0 | - | 4.43 | 79,062 |
| Biggest Cities Once in the Roman Empire | 0 | - | 4.81 | 76,159 |
| Biggest Axis-Controlled Cities | 0 | - | 4.44 | 49,040 |
| Biggest World Cities within 1,000 Km | 0 | - | 4.54 | 43,616 |
| Biggest World Cities in 1850 | 0 | - | 4.61 | 68,711 |
| Cities of Ireland | 0 | - | 4.51 | 50,922 |
| Biggest Cities Starting With A | 0 | - | 4.62 | 125,158 |
| Biggest Cities Starting With D | 0 | - | 4.52 | 117,184 |
| Biggest Cities Starting With H | 0 | - | 4.54 | 109,983 |
| Biggest Cities Starting With L | 0 | - | 4.44 | 123,599 |
| Biggest Cities Starting With M | 0 | - | 4.48 | 144,116 |
| Biggest Cities Starting With P | 0 | - | 4.46 | 127,771 |
| Most Populous Countries in 2050 | 0 | - | 4.91 | 223,859 |
| First Countries to Reach 5 Million People | 0 | - | 4.93 | 135,919 |
| Most Populous Modern-Day Countries in 1000 AD | 0 | - | 4.88 | 76,556 |
| Most Populous Modern-Day Countries in 1 AD | 0 | - | 4.98 | 93,217 |
| Most Populous Modern-Day Countries in 1800 AD | 0 | - | 4.93 | 67,526 |
| Most Populous Modern-Day Countries in 1500 AD | 0 | - | 4.93 | 73,869 |
| Most Populous Modern-Day Countries by Century | 0 | - | 4.98 | 97,785 |
| Countries with the Highest Population Density | 0 | - | 4.95 | 165,696 |
| Countries with the Lowest Population Density | 0 | - | 4.98 | 170,965 |
| Category Elimination - U.S. States #1 | 0 | - | 4.88 | 222,504 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 135,645 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 439,906 |
| Top 10 Most Populous European Countries | 0 | - | 4.97 | 234,601 |
| Top 10 Most Populous Asian Countries | 0 | - | 4.97 | 185,180 |
| Top 10 Most Populous African Countries | 0 | - | 4.99 | 194,938 |
| Top 10 Most Densely-Populated Countries in Asia | 0 | - | 4.92 | 104,932 |
| Top 10 Asian Countries by Population Increase | 0 | - | 4.93 | 108,890 |
| Flags of Countries With More Than 100 Million People | 0 | - | 4.98 | 160,006 |
| Five Most Populated Countries on a Multicolored World Map | 0 | - | 4.98 | 74,583 |
| Biggest Cities with a Muslim Majority | 0 | - | 4.64 | 108,159 |
| Fastest Growing U.S. Cities | 0 | - | 4.35 | 73,183 |
| Biggest Cities in Latin America | 0 | - | 4.48 | 64,997 |
| Biggest Coastal City by Country | 0 | - | 4.61 | 28,140 |
| Five Biggest Cities by Country | 0 | - | 4.70 | 167,367 |
| Biggest City by Region #2 | 0 | - | 4.43 | 24,920 |
| 25 Biggest Cities of the Soviet Union | 0 | - | 4.94 | 84,907 |
| Top 10 Most Populous U.S. State Capitals | 0 | - | 4.48 | 63,599 |
| Biggest Cities in Europe - Extreme | 0 | - | 4.74 | 73,781 |
| Biggest Mediterranean Cities | 0 | - | 4.61 | 91,502 |
| Biggest Cities by Trait #2 | 0 | - | 4.47 | 20,919 |
| Flags to Largest Cities | 0 | - | 4.54 | 51,847 |
| European Cities in the Top 200 Worldwide | 0 | - | 4.70 | 68,348 |
| Biggest World Cities A-Z | 0 | - | 4.63 | 224,200 |
| Most Populous Countries in 1900 | 0 | - | 4.91 | 174,271 |
| 20 Random Country Flags | 0 | - | 4.99 | 619,247 |
| Most Populous Country by First Two Letters | 0 | - | 4.70 | 71,032 |
| Biggest Countries by Population - Shape Quiz | 0 | - | 4.91 | 57,804 |
| Demographics Multiple Choice | 0 | - | 4.70 | 42,390 |
| Least Dense Countries Bordering Each Other | 0 | - | 4.86 | 23,823 |
| Biggest Cities in the Commonwealth of Nations | 0 | - | 4.56 | 65,587 |
| Largest World Cities With Four Letters | 0 | - | 4.39 | 64,562 |
| 100 Biggest US Cities in 1900 | 0 | - | 4.46 | 73,382 |
| Biggest Cities in Germany - Extreme | 0 | - | 4.78 | 47,087 |
| Biggest U.S. Cities Within 200 Kilometers | 0 | - | 4.41 | 49,072 |
| U.S. Cities With Population > 1 Million | 0 | - | 4.43 | 92,301 |
| Biggest U.S. Cities Within 100 Kilometers | 0 | - | 4.42 | 51,748 |
| U.S. States by Second Most Populous City | 0 | - | 4.43 | 44,176 |
| Biggest Cities Near a Border | 0 | - | 4.22 | 32,105 |
| Biggest "Saint" Cities - United States | 0 | - | 4.46 | 37,008 |
| Biggest Cities with a Tropical Climate | 0 | - | 4.38 | 32,123 |
| Fastest Shrinking U.S. Cities | 0 | - | 4.44 | 40,543 |
| 100 Biggest Cities in Spain on a Map | 0 | - | 4.61 | 44,627 |
| Largest Nordic Cities on a Map | 0 | - | 4.78 | 37,401 |
| Biggest Cities in Japan | 0 | - | 4.68 | 83,527 |
| Biggest Cities in Russia | 0 | - | 4.49 | 82,770 |
| Biggest Cities in The Netherlands | 0 | - | 4.50 | 56,288 |
| Biggest Cities in Poland | 0 | - | 4.62 | 54,299 |
| Biggest Cities in Canada | 0 | - | 4.54 | 133,531 |
| Biggest Cities in Switzerland | 0 | - | 4.52 | 47,466 |
| Biggest Cities in India | 0 | - | 4.64 | 68,071 |
| Most Populous Second Cities in the U.S. | 0 | - | 4.31 | 40,991 |
| Biggest Cities Starting With B | 0 | - | 4.34 | 163,832 |
| Biggest Cities Starting With C | 0 | - | 4.11 | 105,821 |
| Biggest Cities Starting With K | 0 | - | 4.31 | 87,517 |
| Biggest Cities Starting With S | 0 | - | 4.40 | 127,376 |
| Biggest Cities Starting With T | 0 | - | 4.29 | 128,854 |
| Name a Valid European Capital | 0 | - | 4.95 | 153,658 |
| Random European Capital to Country | 0 | - | 4.98 | 192,176 |
| Random European Country to Capital | 0 | - | 4.93 | 165,950 |
| Random Asian Country to Capital | 0 | - | 4.92 | 97,000 |
| Random Asian Capital to Country | 0 | - | 4.97 | 103,463 |
| Random African Capital to Country | 0 | - | 4.97 | 101,373 |
| Random African Country to Capital | 0 | - | 4.95 | 71,772 |
| Countries with Four Letters - Shape Quiz | 0 | - | 4.97 | 101,969 |
