| Biggest Cities in the World | 0 | - | 4.91 | 802,236 |
| Capitals of the Most Populated Countries | 0 | - | 4.96 | 128,158 |
| Biggest City by Time Zone | 0 | - | 4.88 | 68,484 |
| Biggest City in Every Country | 0 | - | 4.98 | 101,350 |
| Five Most Populated Cities by Continent | 0 | - | 4.92 | 226,324 |
| Biggest Cities in the World - Extreme | 0 | - | 4.98 | 110,961 |
| Biggest Cities That Aren't World Capitals | 0 | - | 4.94 | 147,056 |
| Biggest Cities with Exceptions | 0 | - | 4.90 | 80,351 |
| Biggest Cities in the Southern Hemisphere | 0 | - | 4.87 | 84,921 |
| 100 Biggest Cities on a World Map | 0 | - | 4.99 | 419,261 |
| Ten Biggest Cities by Hemisphere | 0 | - | 4.96 | 80,521 |
| Biggest Cities in Deserts | 0 | - | 4.97 | 60,303 |
| Most Populous Cities as a Percent of Their Continent | 0 | - | 4.91 | 70,404 |
| Ten Southernmost Megacities | 0 | - | 4.87 | 64,926 |
| 100 Biggest Cities in the World with Exceptions | 0 | - | 4.98 | 68,041 |
| Biggest Cities in 4 Random Countries on a Map | 0 | - | 4.99 | 131,486 |
| Biggest Cities in the United States | 0 | - | 4.94 | 982,358 |
| Biggest Metro Areas in the USA | 0 | - | 4.98 | 367,056 |
| Countries of Europe by Population | 0 | - | 4.98 | 181,870 |
| Biggest Spanish-Speaking Cities | 0 | - | 4.91 | 129,217 |
| Biggest Cities by Language | 0 | - | 4.96 | 247,171 |
| Largest City by Island | 0 | - | 4.87 | 72,155 |
| Biggest Cities in Europe in 1700 | 0 | - | 4.93 | 71,243 |
| Most Populous World Capitals | 0 | - | 4.94 | 176,339 |
| Biggest European Cities by Century | 0 | - | 4.99 | 145,875 |
| Megacities on a World Map | 0 | - | 4.98 | 255,729 |
| All 1M Cities by Proximity | 0 | - | 5.00 | 580,082 |
| 2,000 Biggest World Cities Furthest from a Larger City | 0 | - | 4.98 | 67,575 |
| All 3M Cities on the World Map | 0 | - | 4.95 | 75,302 |
| Every 1,000,000+ City on a Map | 0 | - | 4.99 | 115,471 |
| Biggest City in Each U.S. State | 0 | - | 4.87 | 168,860 |
| Countries With More Than 100 Million People | 0 | - | 4.99 | 166,545 |
| Five Most Populated Countries by Hemisphere | 0 | - | 4.97 | 124,568 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 332,454 |
| 100 Biggest Cities in Europe with a Map | 0 | - | 4.97 | 347,252 |
| Top 10 Most Populous European Countries | 0 | - | 4.97 | 233,593 |
| Top 10 Most Populous Asian Countries | 0 | - | 4.97 | 184,440 |
| Top 10 Most Populous African Countries | 0 | - | 4.99 | 193,986 |
| Top 10 Most Densely-Populated Countries in Asia | 0 | - | 4.92 | 104,493 |
| Top 10 Asian Countries by Population Increase | 0 | - | 4.93 | 108,641 |
| Biggest US Cities by Decade | 0 | - | 4.95 | 168,669 |
| Biggest Cities in Asia | 0 | - | 4.95 | 117,524 |
| Biggest Cities in Asia - Extreme | 0 | - | 4.92 | 50,264 |
| Megacities on an Empty Map | 0 | - | 4.97 | 118,856 |
| African Cities in the Top 200 Worldwide | 0 | - | 4.95 | 51,269 |
| Five Biggest Cities by Country - Extreme | 0 | - | 4.96 | 41,885 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 174,176 |
| Countries with Megacities | 0 | - | 4.99 | 265,262 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 200,005 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,626 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 138,260 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 81,699 |
| Five Biggest World Cities by Letter #2 | 0 | - | 4.84 | 69,146 |
| Five Biggest World Cities by Letter #1 | 0 | - | 4.95 | 73,802 |
| 15 Largest Cities in Europe With a Map | 0 | - | 4.98 | 225,035 |
| 15 Largest Cities in Asia With a Map | 0 | - | 4.98 | 137,238 |
| 250 Biggest Cities in Europe With a Map | 0 | - | 4.91 | 115,890 |
| Colour in the Flag Map by Guessing Cities | 0 | - | 4.92 | 64,799 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,449,763 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 381,353 |
| Second Biggest Cities by Country | 0 | - | 4.43 | 59,829 |
| Biggest Two-Word U.S. Cities | 0 | - | 4.50 | 102,588 |
| Biggest Cities by Trait #1 | 0 | - | 4.50 | 56,068 |
| Biggest City by Region | 0 | - | 4.50 | 36,305 |
| Most Populous 2nd Cities | 0 | - | 4.75 | 57,221 |
| Biggest Cities in the U.S. - Extreme | 0 | - | 4.95 | 159,676 |
| 15 Largest Cities in North America With a Map | 0 | - | 4.98 | 47,662 |
| 15 Largest Cities in the Middle East With a Map | 0 | - | 4.92 | 118,853 |
| Northernmost Major City by Country | 0 | - | 4.57 | 33,245 |
| Largest World Capitals with Exceptions | 0 | - | 4.64 | 52,390 |
| Two Largest Cities by First Two Letters | 0 | - | 4.52 | 83,408 |
| Biggest Cities in Each U.S. State - Extreme | 0 | - | 4.90 | 83,493 |
| 10 Biggest Cities by U.S. State | 0 | - | 4.95 | 42,144 |
| 500 Biggest U.S. Urban Areas | 0 | - | 4.90 | 117,650 |
| 100 Biggest Cities in North America on a Map | 0 | - | 4.84 | 62,615 |
| Ten Northernmost Megacities | 0 | - | 4.50 | 49,484 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.96 | 87,033 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 268,412 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 122,296 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,655 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.90 | 93,851 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 59,309 |
| Biggest Cities in Europe | 0 | - | 4.73 | 547,675 |
| Biggest English-Speaking Cities | 0 | - | 4.44 | 165,273 |
| Biggest Cities in History | 0 | - | 4.52 | 90,367 |
| Top 10 World Cities Through History | 0 | - | 4.43 | 78,504 |
| Biggest Cities once in the Spanish Empire | 0 | - | 4.87 | 56,352 |
| 15 Largest Cities in South America With a Map | 0 | - | 4.95 | 126,751 |
| Biggest World Cities within 1,000 Km | 0 | - | 4.54 | 43,514 |
| Biggest Cities in France - Extreme | 0 | - | 4.87 | 57,092 |
| Biggest World Cities in 1850 | 0 | - | 4.61 | 68,581 |
| Biggest Cities in the Blue Banana | 0 | - | 4.57 | 36,535 |
| Biggest Cities in Germany | 0 | - | 4.95 | 294,302 |
| Cities of China (With Some Help) | 0 | - | 4.91 | 31,674 |
| Biggest Cities Starting With A | 0 | - | 4.62 | 124,612 |
| Biggest Cities Starting With D | 0 | - | 4.52 | 116,856 |
| Biggest Cities Starting With H | 0 | - | 4.54 | 109,661 |
| Biggest Cities Starting With L | 0 | - | 4.44 | 123,267 |
| Biggest Cities Starting With M | 0 | - | 4.48 | 143,712 |
| Biggest Cities Starting With P | 0 | - | 4.46 | 127,386 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 146,809 |
| Most Populous Countries by Year | 0 | - | 4.83 | 110,996 |
| Most Populous Country by First Two Letters | 0 | - | 4.70 | 70,929 |
| Demographics Multiple Choice | 0 | - | 4.70 | 42,316 |
| Most Populated Countries Bordering the Pacific Ocean | 0 | - | 4.97 | 95,748 |
| Most Populous Countries Bordering Each Other | 0 | - | 4.97 | 130,864 |
| Countries with the Most People Bordering Them | 0 | - | 4.98 | 108,271 |
| Populous Countries Bordering Smaller Countries | 0 | - | 4.97 | 113,432 |
| Densest Countries Bordering Each Other | 0 | - | 4.93 | 90,571 |
| Countries with a Population Under 1 Million by Clue | 0 | - | 4.99 | 93,030 |
| Fastest Growing U.S. Cities | 0 | - | 4.35 | 73,110 |
| Biggest Coastal City by Country | 0 | - | 4.61 | 28,101 |
| Biggest City by Region #2 | 0 | - | 4.43 | 24,868 |
| Biggest Cities by Latitude Range | 0 | - | 4.78 | 27,581 |
| Biggest Cities by Trait #2 | 0 | - | 4.47 | 20,763 |
| 100 Biggest Cities in Italy on a Map | 0 | - | 4.88 | 96,743 |
| All Cities in China with Population of 1 Million | 0 | - | 4.82 | 46,319 |
| Biggest Cities in Sweden | 0 | - | 4.85 | 41,325 |
| 100 Biggest Cities in Germany on a Map | 0 | - | 4.92 | 99,387 |
| All Cities in India with Population of 1 Million | 0 | - | 4.84 | 47,717 |
| Every 100k+ City in the United States on a Map | 0 | - | 4.97 | 114,873 |
| Most Populous Countries in 2050 | 0 | - | 4.91 | 223,397 |
| First Countries to Reach 5 Million People | 0 | - | 4.93 | 135,592 |
| Most Populous Modern-Day Countries in 1000 AD | 0 | - | 4.88 | 76,345 |
| Most Populous Modern-Day Countries in 1 AD | 0 | - | 4.98 | 92,991 |
| Most Populous Modern-Day Countries in 1800 AD | 0 | - | 4.93 | 67,378 |
| Most Populous Modern-Day Countries in 1500 AD | 0 | - | 4.93 | 73,684 |
| Most Populous Modern-Day Countries by Century | 0 | - | 4.98 | 97,491 |
| Countries with the Highest Population Density | 0 | - | 4.95 | 165,307 |
| Countries with the Lowest Population Density | 0 | - | 4.98 | 170,485 |
| Five Top Olympic Medal-Winning Countries by Continent | 0 | - | 4.96 | 144,773 |
| Countries with Most Nobel Prizes by Continent | 0 | - | 4.93 | 60,017 |
| Five Coldest Countries by Continent | 0 | - | 4.97 | 76,757 |
| Biggest Cities in Europe - Extreme | 0 | - | 4.74 | 73,627 |
| Biggest Mediterranean Cities | 0 | - | 4.61 | 91,393 |
| European Cities in the Top 200 Worldwide | 0 | - | 4.70 | 67,261 |
| Most Populous Islands | 0 | - | 4.80 | 123,110 |
| Islands by Largest City #1 | 0 | - | 4.47 | 94,336 |
| Islands by Largest City #2 | 0 | - | 4.74 | 35,587 |
| Countries by Population Decrease | 0 | - | 4.46 | 49,904 |
| Flags of Countries With More Than 100 Million People | 0 | - | 4.97 | 159,617 |
| Countries Gaining the Most Population by 2070 | 0 | - | 4.63 | 64,349 |
| Five Most Populated Countries on a Multicolored World Map | 0 | - | 4.98 | 74,223 |
| Least Dense Countries Bordering Each Other | 0 | - | 4.85 | 23,585 |
| Biggest Cities with a Muslim Majority | 0 | - | 4.64 | 107,955 |
| Biggest Cities in Latin America | 0 | - | 4.48 | 64,863 |
| Biggest English Cities by Century | 0 | - | 4.90 | 106,539 |
| Five Biggest Cities by Country | 0 | - | 4.70 | 166,968 |
| Biggest Cities Near a Border | 0 | - | 4.22 | 32,022 |
| Flags to Largest Cities | 0 | - | 4.54 | 51,590 |
| Most Populous Second Cities in the U.S. | 0 | - | 4.30 | 40,956 |
| Biggest World Cities A-Z | 0 | - | 4.63 | 223,582 |
| Biggest Cities Starting With B | 0 | - | 4.34 | 163,068 |
| Biggest Cities Starting With C | 0 | - | 4.11 | 105,500 |
| Biggest Cities Starting With K | 0 | - | 4.31 | 87,276 |
| Biggest Cities Starting With S | 0 | - | 4.40 | 127,018 |
| Biggest Cities Starting With T | 0 | - | 4.29 | 128,524 |
| Most Populous Countries in 1900 | 0 | - | 4.91 | 173,984 |
| Five Most Inland Capital Cities by Continent | 0 | - | 4.92 | 13,425 |
| Five Countries by a Single Word by Continent | 0 | - | 4.91 | 78,439 |
| Five Countries with Most Christians by Continent | 0 | - | 4.99 | 112,128 |
| Five Biggest Economies by Continent | 0 | - | 4.98 | 195,650 |
| Biggest Cities in the Sun Belt on a Map | 0 | - | 4.68 | 23,758 |
| Boundary Waters | 0 | - | 4.92 | 88,625 |
| Countries Along the Afro-Eurasia Coast | 0 | - | 4.86 | 35,297 |
| The Same Suffixes - Geography | 0 | - | 4.98 | 96,377 |
| 100 Geography Questions of Varying Difficulty | 0 | - | 4.93 | 62,892 |
| "Second Best" Geography Edition #2 | 0 | - | 4.88 | 60,710 |
| Biggest Countries by Population - Shape Quiz | 0 | - | 4.91 | 57,654 |
| Biggest Cities Once in the Roman Empire | 0 | - | 4.81 | 75,883 |
| Total United States Immigration by Country | 0 | - | 4.91 | 111,978 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 245,223 |
| Five Countries with the Longest Coastline by Continent | 0 | - | 4.97 | 115,721 |
| Top 15 Most Populous Countries Ending in "IA" | 0 | - | 4.77 | 115,916 |
| Biggest European Cities by Letter | 0 | - | 4.55 | 126,848 |
| Biggest Cities in the Commonwealth of Nations | 0 | - | 4.56 | 65,525 |
| Largest World Cities With Four Letters | 0 | - | 4.39 | 64,247 |
| Biggest Cities in Germany - Extreme | 0 | - | 4.78 | 47,041 |
| U.S. Cities With Population > 1 Million | 0 | - | 4.43 | 91,029 |
| U.S. States by Second Most Populous City | 0 | - | 4.42 | 44,078 |
| Biggest "Saint" Cities - United States | 0 | - | 4.46 | 36,918 |
| Biggest Cities with a Tropical Climate | 0 | - | 4.38 | 32,070 |
| Fastest Shrinking U.S. Cities | 0 | - | 4.44 | 40,458 |
| Most Populous U.S. Cities as a Percent of Their State | 0 | - | 4.78 | 55,295 |
| Cities in European Economic Areas on a Map | 0 | - | 4.70 | 17,871 |
| Biggest Cities in Australia on a Map | 0 | - | 4.62 | 38,062 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,658,285 |
| Landlocked Countries | 0 | - | 4.99 | 422,943 |
| Countries Losing the Most Population by 2070 | 0 | - | 4.40 | 84,637 |
| Jewish Cities Quiz | 0 | - | 4.34 | 61,895 |
| 25 Biggest Cities of the Soviet Union | 0 | - | 4.94 | 84,712 |
| 100 Biggest US Cities in 1900 | 0 | - | 4.46 | 73,226 |
| Biggest U.S. Cities Within 200 Kilometers | 0 | - | 4.41 | 48,942 |
| Biggest U.S. Cities Within 100 Kilometers | 0 | - | 4.42 | 51,651 |
| 100 Biggest Cities in Spain on a Map | 0 | - | 4.59 | 44,375 |
| Cities in Squares on a Map - North America | 0 | - | 4.30 | 21,517 |
| Largest Nordic Cities on a Map | 0 | - | 4.78 | 37,249 |
| Cities on Interstate 90 on a Map | 0 | - | 4.45 | 32,282 |
| Biggest Urban Areas in the UK | 0 | - | 4.43 | 176,506 |
| Biggest Cities in Japan | 0 | - | 4.68 | 83,304 |
