| Biggest Cities in the World | 0 | - | 4.92 | 789,853 |
| Capitals of the Most Populated Countries | 0 | - | 4.96 | 127,067 |
| Biggest City by Time Zone | 0 | - | 4.87 | 66,585 |
| Biggest City in Every Country | 0 | - | 4.98 | 98,572 |
| Five Most Populated Cities by Continent | 0 | - | 4.93 | 221,740 |
| Biggest Cities in the World - Extreme | 0 | - | 4.98 | 108,789 |
| Biggest Cities That Aren't World Capitals | 0 | - | 4.96 | 129,872 |
| Biggest Cities with Exceptions | 0 | - | 4.90 | 78,427 |
| Biggest Cities in the Southern Hemisphere | 0 | - | 4.87 | 83,473 |
| Ten Biggest Cities by Hemisphere | 0 | - | 4.96 | 78,509 |
| Biggest Cities in Deserts | 0 | - | 4.97 | 53,012 |
| Most Populous Cities as a Percent of Their Continent | 0 | - | 4.91 | 69,119 |
| Ten Southernmost Megacities | 0 | - | 4.85 | 56,696 |
| 100 Biggest Cities in the World with Exceptions | 0 | - | 4.97 | 66,626 |
| Biggest Cities in 4 Random Countries on a Map | 0 | - | 4.99 | 128,464 |
| 100 Biggest Cities on a World Map | 0 | - | 4.99 | 413,444 |
| Biggest Cities in the United States | 0 | - | 4.93 | 965,983 |
| Biggest Metro Areas in the USA | 0 | - | 4.98 | 363,650 |
| Countries With More Than 100 Million People | 0 | - | 4.99 | 164,537 |
| Five Most Populated Countries by Hemisphere | 0 | - | 4.96 | 122,890 |
| Biggest Spanish-Speaking Cities | 0 | - | 4.91 | 126,335 |
| Biggest Cities by Language | 0 | - | 4.96 | 230,783 |
| Largest City by Island | 0 | - | 4.87 | 70,999 |
| Biggest Cities in Europe in 1700 | 0 | - | 4.92 | 70,344 |
| Most Populous World Capitals | 0 | - | 4.94 | 174,474 |
| Biggest European Cities by Century | 0 | - | 4.98 | 141,843 |
| Megacities on a World Map | 0 | - | 4.98 | 250,776 |
| All 1M Cities by Proximity | 0 | - | 5.00 | 572,967 |
| 2,000 Biggest World Cities Furthest from a Larger City | 0 | - | 4.98 | 66,756 |
| All 3M Cities on the World Map | 0 | - | 4.95 | 73,808 |
| Every 1,000,000+ City on a Map | 0 | - | 4.99 | 112,601 |
| Biggest City in Each U.S. State | 0 | - | 4.84 | 167,093 |
| Most Populous Countries in 2050 | 0 | - | 4.91 | 221,389 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 323,427 |
| Biggest US Cities by Decade | 0 | - | 4.95 | 166,939 |
| Biggest Cities in Asia | 0 | - | 4.95 | 115,218 |
| Biggest Cities in Asia - Extreme | 0 | - | 4.92 | 49,534 |
| 100 Biggest Cities in Europe with a Map | 0 | - | 4.97 | 341,836 |
| Megacities on an Empty Map | 0 | - | 4.96 | 102,443 |
| African Cities in the Top 200 Worldwide | 0 | - | 4.95 | 50,264 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 170,979 |
| Countries with Megacities | 0 | - | 4.99 | 246,481 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 196,895 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 111,787 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 135,360 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 79,744 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,434,341 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 377,438 |
| Five Biggest World Cities by Letter #2 | 0 | - | 4.83 | 68,512 |
| Five Biggest World Cities by Letter #1 | 0 | - | 4.95 | 73,083 |
| 15 Largest Cities in Europe With a Map | 0 | - | 4.98 | 222,377 |
| 15 Largest Cities in Asia With a Map | 0 | - | 4.98 | 135,516 |
| 250 Biggest Cities in Europe With a Map | 0 | - | 4.91 | 113,732 |
| Second Biggest Cities by Country | 0 | - | 4.43 | 58,871 |
| Biggest Two-Word U.S. Cities | 0 | - | 4.50 | 101,890 |
| Biggest Cities by Trait #1 | 0 | - | 4.50 | 55,674 |
| Biggest City by Region | 0 | - | 4.50 | 35,984 |
| Most Populous 2nd Cities | 0 | - | 4.78 | 56,885 |
| Northernmost Major City by Country | 0 | - | 4.56 | 33,006 |
| Largest World Capitals with Exceptions | 0 | - | 4.63 | 52,215 |
| Two Largest Cities by First Two Letters | 0 | - | 4.53 | 82,902 |
| Ten Northernmost Megacities | 0 | - | 4.50 | 49,245 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.95 | 85,771 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 265,809 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 120,811 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 111,437 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 92,536 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 58,197 |
| Biggest Cities in the U.S. - Extreme | 0 | - | 4.96 | 158,202 |
| 15 Largest Cities in North America With a Map | 0 | - | 4.98 | 46,413 |
| 15 Largest Cities in the Middle East With a Map | 0 | - | 4.92 | 117,207 |
| Biggest Cities in Each U.S. State - Extreme | 0 | - | 4.93 | 78,665 |
| 10 Biggest Cities by U.S. State | 0 | - | 4.95 | 40,705 |
| 500 Biggest U.S. Urban Areas | 0 | - | 4.90 | 115,413 |
| 100 Biggest Cities in North America on a Map | 0 | - | 4.84 | 61,486 |
| Biggest Cities in Europe | 0 | - | 4.70 | 541,903 |
| Most Populous Country by First Two Letters | 0 | - | 4.70 | 70,646 |
| Demographics Multiple Choice | 0 | - | 4.69 | 42,078 |
| Biggest English-Speaking Cities | 0 | - | 4.45 | 151,330 |
| Fastest Growing U.S. Cities | 0 | - | 4.34 | 72,846 |
| Biggest Cities in History | 0 | - | 4.52 | 89,088 |
| Top 10 World Cities Through History | 0 | - | 4.43 | 72,102 |
| Biggest Coastal City by Country | 0 | - | 4.61 | 27,971 |
| Biggest City by Region #2 | 0 | - | 4.43 | 24,659 |
| Biggest Cities by Latitude Range | 0 | - | 4.78 | 27,462 |
| Biggest Cities once in the Spanish Empire | 0 | - | 4.87 | 55,631 |
| 15 Largest Cities in South America With a Map | 0 | - | 4.94 | 124,139 |
| Biggest World Cities within 1,000 Km | 0 | - | 4.53 | 43,170 |
| Biggest Cities by Trait #2 | 0 | - | 4.46 | 20,193 |
| Biggest Cities in France - Extreme | 0 | - | 4.87 | 55,789 |
| Biggest World Cities in 1850 | 0 | - | 4.61 | 68,180 |
| Biggest Cities in Germany | 0 | - | 4.95 | 291,123 |
| Biggest Cities Starting With A | 0 | - | 4.62 | 123,455 |
| Biggest Cities Starting With D | 0 | - | 4.51 | 115,926 |
| Biggest Cities Starting With H | 0 | - | 4.54 | 108,556 |
| Biggest Cities Starting With L | 0 | - | 4.44 | 121,865 |
| Biggest Cities Starting With M | 0 | - | 4.48 | 142,106 |
| Biggest Cities Starting With P | 0 | - | 4.46 | 125,953 |
| Countries of Europe by Population | 0 | - | 4.98 | 177,897 |
| Most Populous Countries by Year | 0 | - | 4.83 | 109,129 |
| Most Populated Countries Bordering the Pacific Ocean | 0 | - | 4.96 | 95,110 |
| Most Populous Countries Bordering Each Other | 0 | - | 4.97 | 129,246 |
| Countries with the Most People Bordering Them | 0 | - | 4.98 | 106,845 |
| Populous Countries Bordering Smaller Countries | 0 | - | 4.97 | 112,350 |
| Densest Countries Bordering Each Other | 0 | - | 4.93 | 89,525 |
| Countries with a Population Under 1 Million by Clue | 0 | - | 4.99 | 92,250 |
| First Countries to Reach 5 Million People | 0 | - | 4.92 | 134,230 |
| Most Populous Modern-Day Countries in 1000 AD | 0 | - | 4.87 | 75,212 |
| Most Populous Modern-Day Countries in 1 AD | 0 | - | 4.97 | 83,560 |
| Most Populous Modern-Day Countries in 1800 AD | 0 | - | 4.93 | 66,524 |
| Most Populous Modern-Day Countries in 1500 AD | 0 | - | 4.93 | 72,759 |
| Most Populous Modern-Day Countries by Century | 0 | - | 4.98 | 96,155 |
| Countries with the Highest Population Density | 0 | - | 4.94 | 164,059 |
| Countries with the Lowest Population Density | 0 | - | 4.98 | 169,033 |
| Biggest Cities in Europe - Extreme | 0 | - | 4.74 | 73,087 |
| Biggest Mediterranean Cities | 0 | - | 4.61 | 91,014 |
| European Cities in the Top 200 Worldwide | 0 | - | 4.56 | 48,865 |
| 100 Biggest Cities in Italy on a Map | 0 | - | 4.87 | 94,230 |
| Cities of China (With Some Help) | 0 | - | 4.91 | 31,270 |
| Biggest Cities in Sweden | 0 | - | 4.85 | 40,930 |
| 100 Biggest Cities in Germany on a Map | 0 | - | 4.91 | 96,953 |
| All Cities in India with Population of 1 Million | 0 | - | 4.83 | 47,031 |
| Five Biggest Cities by Country - Extreme | 0 | - | 4.96 | 40,715 |
| Boundary Waters | 0 | - | 4.92 | 88,023 |
| Countries Along the Afro-Eurasia Coast | 0 | - | 4.85 | 34,795 |
| The Same Suffixes - Geography | 0 | - | 4.98 | 95,231 |
| 100 Geography Questions of Varying Difficulty | 0 | - | 4.93 | 61,221 |
| "Second Best" Geography Edition #2 | 0 | - | 4.87 | 59,807 |
| Most Populous Islands | 0 | - | 4.78 | 121,945 |
| Islands by Largest City #1 | 0 | - | 4.47 | 94,196 |
| Islands by Largest City #2 | 0 | - | 4.74 | 35,399 |
| Top 10 Most Populous European Countries | 0 | - | 4.98 | 230,828 |
| Top 10 Most Populous Asian Countries | 0 | - | 4.96 | 181,910 |
| Top 10 Most Populous African Countries | 0 | - | 4.99 | 191,772 |
| Top 10 Most Densely-Populated Countries in Asia | 0 | - | 4.92 | 102,945 |
| Countries by Population Decrease | 0 | - | 4.45 | 49,601 |
| Top 10 Asian Countries by Population Increase | 0 | - | 4.93 | 107,794 |
| Flags of Countries With More Than 100 Million People | 0 | - | 4.97 | 158,332 |
| Countries Gaining the Most Population by 2070 | 0 | - | 4.63 | 63,831 |
| Five Most Populated Countries on a Multicolored World Map | 0 | - | 4.98 | 73,109 |
| Least Dense Countries Bordering Each Other | 0 | - | 4.85 | 22,901 |
| Biggest Cities Near a Border | 0 | - | 4.21 | 31,740 |
| Most Populous Second Cities in the U.S. | 0 | - | 4.30 | 40,837 |
| Biggest Cities Starting With B | 0 | - | 4.34 | 161,712 |
| Biggest Cities Starting With C | 0 | - | 4.11 | 104,560 |
| Biggest Cities Starting With K | 0 | - | 4.31 | 86,605 |
| Biggest Cities Starting With S | 0 | - | 4.40 | 125,717 |
| Biggest Cities Starting With T | 0 | - | 4.29 | 127,399 |
| Most Populous Countries in 1900 | 0 | - | 4.91 | 172,544 |
| Biggest Cities in the Sun Belt on a Map | 0 | - | 4.68 | 23,368 |
| Biggest Cities with a Muslim Majority | 0 | - | 4.69 | 107,280 |
| Biggest Cities in Latin America | 0 | - | 4.48 | 64,464 |
| Biggest English Cities by Century | 0 | - | 4.90 | 105,571 |
| Five Biggest Cities by Country | 0 | - | 4.70 | 165,611 |
| Flags to Largest Cities | 0 | - | 4.55 | 50,752 |
| Biggest World Cities A-Z | 0 | - | 4.63 | 221,282 |
| Countries of the World Quiz | 0 | - | 5.00 | 46,887,191 |
| Top 15 Most Populous Countries Ending in "IA" | 0 | - | 4.74 | 99,418 |
| Biggest Countries by Population - Shape Quiz | 0 | - | 4.91 | 56,923 |
| Biggest European Cities by Letter | 0 | - | 4.55 | 126,202 |
| Biggest Cities in the Commonwealth of Nations | 0 | - | 4.61 | 65,304 |
| Largest World Cities With Four Letters | 0 | - | 4.36 | 50,592 |
| Biggest Cities in Germany - Extreme | 0 | - | 4.78 | 46,846 |
| U.S. Cities With Population > 1 Million | 0 | - | 4.47 | 84,192 |
| U.S. States by Second Most Populous City | 0 | - | 4.42 | 43,678 |
| Biggest "Saint" Cities - United States | 0 | - | 4.46 | 36,596 |
| Biggest Cities with a Tropical Climate | 0 | - | 4.38 | 31,869 |
| Fastest Shrinking U.S. Cities | 0 | - | 4.43 | 40,160 |
| Biggest Cities in Australia on a Map | 0 | - | 4.61 | 37,531 |
| Landlocked Countries | 0 | - | 4.99 | 413,240 |
| World Geography on a Map #1 | 0 | - | 4.94 | 73,130 |
| Geography Tile Select Quiz | 0 | - | 4.98 | 94,956 |
| Countries Losing the Most Population by 2070 | 0 | - | 4.40 | 84,104 |
| Population Trivia | 0 | - | 4.32 | 27,417 |
| Cities in Squares on a Map - North America | 0 | - | 4.30 | 21,322 |
| World Capitals Quiz | 0 | - | 5.00 | 5,028,828 |
| Sahara Desert Countries | 0 | - | 4.98 | 160,412 |
| Himalayan Countries | 0 | - | 4.95 | 135,197 |
| Andean Countries | 0 | - | 4.94 | 82,748 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 62,162 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 123,102 |
| Coffee Producing Countries | 0 | - | 4.81 | 65,828 |
| Countries with Shrinking Populations | 0 | - | 4.93 | 64,534 |
| Danube Countries | 0 | - | 4.97 | 71,041 |
| Countries With an "Ish" Demonym | 0 | - | 4.98 | 115,704 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 85,497 |
| Countries with the Worst Passports | 0 | - | 4.94 | 82,385 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 147,308 |
| European Landlocked Countries | 0 | - | 4.99 | 145,711 |
| Partially Recognized Countries | 0 | - | 4.98 | 105,130 |
| Countries with the Most Species | 0 | - | 4.99 | 95,222 |
| Countries 197 to 205 | 0 | - | 4.89 | 69,281 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,190 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,353 |
| Countries that Use the Peso | 0 | - | 4.87 | 58,936 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.89 | 72,547 |
| Countries with a AAA Credit Rating | 0 | - | 4.85 | 56,913 |
| Countries in the Alps | 0 | - | 4.87 | 116,760 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 94,521 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 105,170 |
