| Biggest Cities in the World | 0 | - | 4.91 | 806,948 |
| Capitals of the Most Populated Countries | 0 | - | 4.96 | 128,573 |
| Biggest City by Time Zone | 0 | - | 4.88 | 69,092 |
| Biggest City in Every Country | 0 | - | 4.98 | 102,178 |
| Biggest Cities by Latitude Range | 0 | - | 4.81 | 32,954 |
| Five Most Populated Cities by Continent | 0 | - | 4.92 | 227,818 |
| Biggest Cities in the World - Extreme | 0 | - | 4.98 | 111,658 |
| Biggest Cities That Aren't World Capitals | 0 | - | 4.94 | 150,579 |
| Biggest Cities with Exceptions | 0 | - | 4.90 | 80,946 |
| Biggest Cities in the Southern Hemisphere | 0 | - | 4.87 | 85,380 |
| Ten Biggest Cities by Hemisphere | 0 | - | 4.96 | 81,094 |
| Biggest Cities in Deserts | 0 | - | 4.97 | 60,714 |
| Most Populous Cities as a Percent of Their Continent | 0 | - | 4.92 | 70,839 |
| Ten Southernmost Megacities | 0 | - | 4.84 | 65,304 |
| 100 Biggest Cities in the World with Exceptions | 0 | - | 4.98 | 68,559 |
| Biggest Cities in 4 Random Countries on a Map | 0 | - | 4.99 | 132,759 |
| 100 Biggest Cities on a World Map | 0 | - | 4.99 | 421,143 |
| Biggest Cities in the United States | 0 | - | 4.94 | 989,072 |
| Biggest Metro Areas in the USA | 0 | - | 4.98 | 368,501 |
| Countries With More Than 100 Million People | 0 | - | 4.99 | 167,165 |
| Five Most Populated Countries by Hemisphere | 0 | - | 4.97 | 125,190 |
| Biggest Spanish-Speaking Cities | 0 | - | 4.91 | 129,784 |
| Biggest Cities by Language | 0 | - | 4.96 | 247,849 |
| Largest City by Island | 0 | - | 4.87 | 72,570 |
| Biggest Cities in Europe in 1700 | 0 | - | 4.93 | 71,494 |
| Most Populous World Capitals | 0 | - | 4.94 | 176,863 |
| Biggest European Cities by Century | 0 | - | 4.99 | 146,244 |
| Megacities on a World Map | 0 | - | 4.98 | 257,442 |
| All 1M Cities by Proximity | 0 | - | 5.00 | 582,890 |
| 2,000 Biggest World Cities Furthest from a Larger City | 0 | - | 4.98 | 67,839 |
| All 3M Cities on the World Map | 0 | - | 4.95 | 75,835 |
| Every 1,000,000+ City on a Map | 0 | - | 4.99 | 116,772 |
| Biggest City in Each U.S. State | 0 | - | 4.87 | 169,852 |
| Most Populous Countries in 2050 | 0 | - | 4.91 | 224,024 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 336,602 |
| Biggest US Cities by Decade | 0 | - | 4.95 | 169,124 |
| Biggest Cities in Asia | 0 | - | 4.95 | 118,357 |
| Biggest Cities in Asia - Extreme | 0 | - | 4.92 | 50,481 |
| 100 Biggest Cities in Europe with a Map | 0 | - | 4.97 | 349,347 |
| Megacities on an Empty Map | 0 | - | 4.97 | 119,359 |
| African Cities in the Top 200 Worldwide | 0 | - | 4.95 | 51,602 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 175,498 |
| Countries with Megacities | 0 | - | 4.99 | 267,843 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 201,146 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 114,336 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 139,473 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 82,436 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,456,010 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 382,974 |
| Five Biggest World Cities by Letter #2 | 0 | - | 4.84 | 69,368 |
| Five Biggest World Cities by Letter #1 | 0 | - | 4.95 | 74,029 |
| 15 Largest Cities in Europe With a Map | 0 | - | 4.98 | 226,083 |
| 15 Largest Cities in Asia With a Map | 0 | - | 4.98 | 137,920 |
| 250 Biggest Cities in Europe With a Map | 0 | - | 4.90 | 116,712 |
| Second Biggest Cities by Country | 0 | - | 4.43 | 60,198 |
| Biggest Two-Word U.S. Cities | 0 | - | 4.50 | 102,678 |
| Biggest Cities by Trait #1 | 0 | - | 4.50 | 56,179 |
| Biggest City by Region | 0 | - | 4.50 | 36,416 |
| Most Populous 2nd Cities | 0 | - | 4.75 | 57,374 |
| Northernmost Major City by Country | 0 | - | 4.57 | 33,329 |
| Largest World Capitals with Exceptions | 0 | - | 4.64 | 52,460 |
| Two Largest Cities by First Two Letters | 0 | - | 4.52 | 83,608 |
| Ten Northernmost Megacities | 0 | - | 4.50 | 49,602 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.96 | 87,466 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 269,517 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 122,815 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,994 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.91 | 94,359 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 59,720 |
| Biggest Cities in the U.S. - Extreme | 0 | - | 4.95 | 160,225 |
| 15 Largest Cities in North America With a Map | 0 | - | 4.98 | 48,176 |
| 15 Largest Cities in the Middle East With a Map | 0 | - | 4.92 | 119,529 |
| Biggest Cities in Each U.S. State - Extreme | 0 | - | 4.91 | 84,968 |
| 10 Biggest Cities by U.S. State | 0 | - | 4.95 | 42,609 |
| 500 Biggest U.S. Urban Areas | 0 | - | 4.90 | 118,438 |
| 100 Biggest Cities in North America on a Map | 0 | - | 4.84 | 63,038 |
| Biggest Cities in Europe | 0 | - | 4.70 | 549,757 |
| Most Populous Country by First Two Letters | 0 | - | 4.70 | 71,062 |
| Demographics Multiple Choice | 0 | - | 4.70 | 42,414 |
| Biggest English-Speaking Cities | 0 | - | 4.45 | 166,025 |
| Fastest Growing U.S. Cities | 0 | - | 4.35 | 73,198 |
| Biggest Cities in History | 0 | - | 4.52 | 90,697 |
| Top 10 World Cities Through History | 0 | - | 4.43 | 79,201 |
| Biggest Coastal City by Country | 0 | - | 4.61 | 28,152 |
| Biggest City by Region #2 | 0 | - | 4.43 | 24,934 |
| Biggest Cities once in the Spanish Empire | 0 | - | 4.87 | 56,607 |
| 15 Largest Cities in South America With a Map | 0 | - | 4.94 | 127,795 |
| Biggest World Cities within 1,000 Km | 0 | - | 4.54 | 43,642 |
| Biggest Cities by Trait #2 | 0 | - | 4.47 | 20,963 |
| Biggest Cities in France - Extreme | 0 | - | 4.87 | 57,582 |
| Biggest World Cities in 1850 | 0 | - | 4.61 | 68,734 |
| Biggest Cities in the Blue Banana | 0 | - | 4.57 | 36,727 |
| Biggest Cities in Germany | 0 | - | 4.95 | 295,638 |
| Cities of China (With Some Help) | 0 | - | 4.91 | 31,828 |
| Biggest Cities Starting With A | 0 | - | 4.62 | 125,241 |
| Biggest Cities Starting With D | 0 | - | 4.52 | 117,239 |
| Biggest Cities Starting With H | 0 | - | 4.54 | 110,059 |
| Biggest Cities Starting With L | 0 | - | 4.44 | 123,672 |
| Biggest Cities Starting With M | 0 | - | 4.48 | 144,205 |
| Biggest Cities Starting With P | 0 | - | 4.46 | 127,848 |
| Countries of Europe by Population | 0 | - | 4.98 | 183,615 |
| Most Populous Countries by Year | 0 | - | 4.83 | 111,608 |
| Most Populated Countries Bordering the Pacific Ocean | 0 | - | 4.97 | 95,973 |
| Most Populous Countries Bordering Each Other | 0 | - | 4.97 | 131,569 |
| Countries with the Most People Bordering Them | 0 | - | 4.98 | 108,856 |
| Populous Countries Bordering Smaller Countries | 0 | - | 4.97 | 113,894 |
| Densest Countries Bordering Each Other | 0 | - | 4.93 | 91,048 |
| Countries with a Population Under 1 Million by Clue | 0 | - | 4.99 | 93,255 |
| First Countries to Reach 5 Million People | 0 | - | 4.93 | 136,015 |
| Most Populous Modern-Day Countries in 1000 AD | 0 | - | 4.88 | 76,607 |
| Most Populous Modern-Day Countries in 1 AD | 0 | - | 4.98 | 93,280 |
| Most Populous Modern-Day Countries in 1800 AD | 0 | - | 4.93 | 67,573 |
| Most Populous Modern-Day Countries in 1500 AD | 0 | - | 4.93 | 73,924 |
| Most Populous Modern-Day Countries by Century | 0 | - | 4.98 | 97,869 |
| Countries with the Highest Population Density | 0 | - | 4.94 | 165,805 |
| Countries with the Lowest Population Density | 0 | - | 4.98 | 171,179 |
| Biggest Cities in Europe - Extreme | 0 | - | 4.74 | 73,840 |
| Biggest Mediterranean Cities | 0 | - | 4.61 | 91,535 |
| European Cities in the Top 200 Worldwide | 0 | - | 4.70 | 68,613 |
| 100 Biggest Cities in Italy on a Map | 0 | - | 4.89 | 97,677 |
| All Cities in China with Population of 1 Million | 0 | - | 4.82 | 46,708 |
| Biggest Cities in Sweden | 0 | - | 4.85 | 41,511 |
| 100 Biggest Cities in Germany on a Map | 0 | - | 4.92 | 100,354 |
| All Cities in India with Population of 1 Million | 0 | - | 4.84 | 48,086 |
| Five Biggest Cities by Country - Extreme | 0 | - | 4.96 | 42,422 |
| Every 100k+ City in the United States on a Map | 0 | - | 4.98 | 119,681 |
| Boundary Waters | 0 | - | 4.92 | 88,834 |
| Countries Along the Afro-Eurasia Coast | 0 | - | 4.88 | 35,466 |
| The Same Suffixes - Geography | 0 | - | 4.98 | 96,838 |
| 100 Geography Questions of Varying Difficulty | 0 | - | 4.93 | 63,562 |
| "Second Best" Geography Edition #2 | 0 | - | 4.88 | 61,061 |
| Most Populous Islands | 0 | - | 4.80 | 123,436 |
| Islands by Largest City #1 | 0 | - | 4.47 | 94,403 |
| Islands by Largest City #2 | 0 | - | 4.74 | 35,675 |
| Top 10 Most Populous European Countries | 0 | - | 4.97 | 234,907 |
| Top 10 Most Populous Asian Countries | 0 | - | 4.97 | 185,435 |
| Top 10 Most Populous African Countries | 0 | - | 4.99 | 195,275 |
| Top 10 Most Densely-Populated Countries in Asia | 0 | - | 4.92 | 105,090 |
| Countries by Population Decrease | 0 | - | 4.46 | 50,018 |
| Top 10 Asian Countries by Population Increase | 0 | - | 4.93 | 108,970 |
| Flags of Countries With More Than 100 Million People | 0 | - | 4.98 | 160,105 |
| Countries Gaining the Most Population by 2070 | 0 | - | 4.63 | 64,544 |
| Five Most Populated Countries on a Multicolored World Map | 0 | - | 4.98 | 74,706 |
| Least Dense Countries Bordering Each Other | 0 | - | 4.86 | 23,893 |
| Biggest Cities Near a Border | 0 | - | 4.22 | 32,121 |
| Most Populous Second Cities in the U.S. | 0 | - | 4.31 | 41,002 |
| Biggest Cities Starting With B | 0 | - | 4.34 | 163,918 |
| Biggest Cities Starting With C | 0 | - | 4.12 | 105,873 |
| Biggest Cities Starting With K | 0 | - | 4.31 | 87,566 |
| Biggest Cities Starting With S | 0 | - | 4.40 | 127,455 |
| Biggest Cities Starting With T | 0 | - | 4.29 | 128,920 |
| Most Populous Countries in 1900 | 0 | - | 4.91 | 174,365 |
| Biggest Cities in the Sun Belt on a Map | 0 | - | 4.67 | 23,886 |
| Highest Fertility Countries | 0 | - | 4.90 | 27,306 |
| Biggest Cities with a Muslim Majority | 0 | - | 4.64 | 108,212 |
| Biggest Cities in Latin America | 0 | - | 4.48 | 65,028 |
| Biggest English Cities by Century | 0 | - | 4.91 | 107,091 |
| Five Biggest Cities by Country | 0 | - | 4.70 | 167,476 |
| Flags to Largest Cities | 0 | - | 4.54 | 51,915 |
| Biggest World Cities A-Z | 0 | - | 4.63 | 224,368 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,968,335 |
| Top 15 Most Populous Countries Ending in "IA" | 0 | - | 4.77 | 116,235 |
| Biggest Countries by Population - Shape Quiz | 0 | - | 4.91 | 57,863 |
| Biggest European Cities by Letter | 0 | - | 4.55 | 127,543 |
| Biggest Cities in the Commonwealth of Nations | 0 | - | 4.56 | 65,615 |
| Largest World Cities With Four Letters | 0 | - | 4.39 | 64,631 |
| Biggest Cities Once in the Roman Empire | 0 | - | 4.81 | 76,221 |
| Biggest Cities in Germany - Extreme | 0 | - | 4.78 | 47,105 |
| U.S. Cities With Population > 1 Million | 0 | - | 4.43 | 92,512 |
| U.S. States by Second Most Populous City | 0 | - | 4.43 | 44,197 |
| Biggest "Saint" Cities - United States | 0 | - | 4.46 | 37,034 |
| Biggest Cities with a Tropical Climate | 0 | - | 4.38 | 32,143 |
| Fastest Shrinking U.S. Cities | 0 | - | 4.44 | 40,560 |
| Biggest Cities in Australia on a Map | 0 | - | 4.62 | 38,242 |
| Landlocked Countries | 0 | - | 4.99 | 427,233 |
| World Geography on a Map #1 | 0 | - | 4.94 | 73,990 |
| Geography Tile Select Quiz | 0 | - | 4.98 | 96,514 |
| Countries Losing the Most Population by 2070 | 0 | - | 4.40 | 84,816 |
| Population Trivia | 0 | - | 4.32 | 27,592 |
| Cities in Squares on a Map - North America | 0 | - | 4.31 | 21,600 |
| World Capitals Quiz | 0 | - | 5.00 | 5,113,674 |
| Sahara Desert Countries | 0 | - | 4.98 | 166,905 |
| Himalayan Countries | 0 | - | 4.93 | 140,821 |
| Andean Countries | 0 | - | 4.94 | 85,798 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 64,913 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 127,484 |
| Coffee Producing Countries | 0 | - | 4.83 | 68,464 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 66,688 |
| Danube Countries | 0 | - | 4.97 | 72,553 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 117,799 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,971 |
| Countries with the Worst Passports | 0 | - | 4.93 | 85,439 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 150,914 |
| European Landlocked Countries | 0 | - | 4.99 | 147,740 |
| Partially Recognized Countries | 0 | - | 4.98 | 107,537 |
| Countries with the Most Species | 0 | - | 4.99 | 103,645 |
| Countries 197 to 205 | 0 | - | 4.90 | 71,638 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,814 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,953 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,925 |
