| Biggest Cities in the World | 0 | - | 4.91 | 794,848 |
| Capitals of the Most Populated Countries | 0 | - | 4.96 | 127,491 |
| Biggest City by Time Zone | 0 | - | 4.88 | 67,262 |
| Biggest City in Every Country | 0 | - | 4.98 | 99,562 |
| Five Most Populated Cities by Continent | 0 | - | 4.92 | 223,550 |
| Biggest Cities in the World - Extreme | 0 | - | 4.98 | 109,598 |
| Biggest Cities That Aren't World Capitals | 0 | - | 4.95 | 132,090 |
| Biggest Cities with Exceptions | 0 | - | 4.90 | 79,139 |
| Biggest Cities in the Southern Hemisphere | 0 | - | 4.87 | 84,022 |
| 100 Biggest Cities on a World Map | 0 | - | 4.99 | 415,707 |
| Ten Biggest Cities by Hemisphere | 0 | - | 4.96 | 79,217 |
| Biggest Cities in Deserts | 0 | - | 4.97 | 53,511 |
| Most Populous Cities as a Percent of Their Continent | 0 | - | 4.91 | 69,574 |
| Ten Southernmost Megacities | 0 | - | 4.85 | 57,091 |
| 100 Biggest Cities in the World with Exceptions | 0 | - | 4.98 | 67,175 |
| Biggest Cities in 4 Random Countries on a Map | 0 | - | 4.99 | 129,446 |
| Biggest Cities in the United States | 0 | - | 4.93 | 973,114 |
| Biggest Metro Areas in the USA | 0 | - | 4.98 | 365,046 |
| Biggest Spanish-Speaking Cities | 0 | - | 4.91 | 127,708 |
| Biggest Cities by Language | 0 | - | 4.96 | 245,652 |
| Largest City by Island | 0 | - | 4.87 | 71,496 |
| Biggest Cities in Europe in 1700 | 0 | - | 4.93 | 70,650 |
| Most Populous World Capitals | 0 | - | 4.94 | 175,430 |
| Biggest European Cities by Century | 0 | - | 4.99 | 145,062 |
| Megacities on a World Map | 0 | - | 4.98 | 252,580 |
| All 1M Cities by Proximity | 0 | - | 5.00 | 575,924 |
| 2,000 Biggest World Cities Furthest from a Larger City | 0 | - | 4.98 | 67,075 |
| All 3M Cities on the World Map | 0 | - | 4.95 | 74,477 |
| Every 1,000,000+ City on a Map | 0 | - | 4.99 | 113,796 |
| Biggest City in Each U.S. State | 0 | - | 4.85 | 167,858 |
| Countries With More Than 100 Million People | 0 | - | 4.99 | 165,396 |
| Five Most Populated Countries by Hemisphere | 0 | - | 4.97 | 123,656 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 327,583 |
| 100 Biggest Cities in Europe with a Map | 0 | - | 4.97 | 343,922 |
| Biggest US Cities by Decade | 0 | - | 4.95 | 167,517 |
| Biggest Cities in Asia | 0 | - | 4.95 | 116,295 |
| Biggest Cities in Asia - Extreme | 0 | - | 4.92 | 49,786 |
| Megacities on an Empty Map | 0 | - | 4.97 | 117,709 |
| African Cities in the Top 200 Worldwide | 0 | - | 4.95 | 50,632 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 172,499 |
| Countries with Megacities | 0 | - | 4.99 | 249,444 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 198,350 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 112,674 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 136,683 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 80,644 |
| Five Biggest World Cities by Letter #2 | 0 | - | 4.83 | 68,724 |
| Five Biggest World Cities by Letter #1 | 0 | - | 4.95 | 73,321 |
| 15 Largest Cities in Europe With a Map | 0 | - | 4.98 | 223,387 |
| 15 Largest Cities in Asia With a Map | 0 | - | 4.98 | 136,242 |
| 250 Biggest Cities in Europe With a Map | 0 | - | 4.91 | 114,534 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,440,956 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 379,116 |
| Second Biggest Cities by Country | 0 | - | 4.43 | 59,278 |
| Biggest Two-Word U.S. Cities | 0 | - | 4.50 | 102,009 |
| Biggest Cities by Trait #1 | 0 | - | 4.50 | 55,869 |
| Biggest City by Region | 0 | - | 4.50 | 36,084 |
| Most Populous 2nd Cities | 0 | - | 4.77 | 57,017 |
| Biggest Cities in the U.S. - Extreme | 0 | - | 4.96 | 158,824 |
| 15 Largest Cities in North America With a Map | 0 | - | 4.98 | 46,888 |
| 15 Largest Cities in the Middle East With a Map | 0 | - | 4.92 | 117,884 |
| Northernmost Major City by Country | 0 | - | 4.56 | 33,122 |
| Largest World Capitals with Exceptions | 0 | - | 4.63 | 52,300 |
| Two Largest Cities by First Two Letters | 0 | - | 4.53 | 83,108 |
| Biggest Cities in Each U.S. State - Extreme | 0 | - | 4.93 | 79,086 |
| 10 Biggest Cities by U.S. State | 0 | - | 4.95 | 41,380 |
| 500 Biggest U.S. Urban Areas | 0 | - | 4.90 | 116,222 |
| 100 Biggest Cities in North America on a Map | 0 | - | 4.84 | 61,910 |
| Ten Northernmost Megacities | 0 | - | 4.50 | 49,330 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.95 | 86,360 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 267,053 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 121,437 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,136 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 93,179 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 58,723 |
| Biggest Cities in Europe | 0 | - | 4.72 | 544,356 |
| Biggest English-Speaking Cities | 0 | - | 4.44 | 151,899 |
| Biggest Cities in History | 0 | - | 4.52 | 89,890 |
| Top 10 World Cities Through History | 0 | - | 4.43 | 72,240 |
| Biggest Cities once in the Spanish Empire | 0 | - | 4.87 | 55,849 |
| 15 Largest Cities in South America With a Map | 0 | - | 4.95 | 125,294 |
| Biggest World Cities within 1,000 Km | 0 | - | 4.53 | 43,307 |
| Biggest Cities in France - Extreme | 0 | - | 4.87 | 56,294 |
| Biggest World Cities in 1850 | 0 | - | 4.61 | 68,338 |
| Biggest Cities in the Blue Banana | 0 | - | 4.56 | 36,220 |
| Biggest Cities in Germany | 0 | - | 4.95 | 292,530 |
| Biggest Cities Starting With A | 0 | - | 4.62 | 123,913 |
| Biggest Cities Starting With D | 0 | - | 4.52 | 116,301 |
| Biggest Cities Starting With H | 0 | - | 4.54 | 109,010 |
| Biggest Cities Starting With L | 0 | - | 4.44 | 122,328 |
| Biggest Cities Starting With M | 0 | - | 4.48 | 142,883 |
| Biggest Cities Starting With P | 0 | - | 4.46 | 126,385 |
| Countries of Europe by Population | 0 | - | 4.98 | 179,552 |
| Most Populous Countries by Year | 0 | - | 4.83 | 110,067 |
| Most Populous Country by First Two Letters | 0 | - | 4.70 | 70,750 |
| Demographics Multiple Choice | 0 | - | 4.69 | 42,181 |
| Most Populated Countries Bordering the Pacific Ocean | 0 | - | 4.97 | 95,380 |
| Most Populous Countries Bordering Each Other | 0 | - | 4.97 | 129,972 |
| Countries with the Most People Bordering Them | 0 | - | 4.98 | 107,493 |
| Populous Countries Bordering Smaller Countries | 0 | - | 4.97 | 112,813 |
| Densest Countries Bordering Each Other | 0 | - | 4.93 | 89,972 |
| Countries with a Population Under 1 Million by Clue | 0 | - | 4.99 | 92,667 |
| Fastest Growing U.S. Cities | 0 | - | 4.35 | 72,961 |
| Biggest Coastal City by Country | 0 | - | 4.61 | 28,013 |
| Biggest City by Region #2 | 0 | - | 4.43 | 24,729 |
| Biggest Cities by Latitude Range | 0 | - | 4.78 | 27,515 |
| Biggest Cities by Trait #2 | 0 | - | 4.46 | 20,446 |
| 100 Biggest Cities in Italy on a Map | 0 | - | 4.88 | 95,259 |
| All Cities in China with Population of 1 Million | 0 | - | 4.81 | 45,794 |
| Biggest Cities in Sweden | 0 | - | 4.85 | 41,070 |
| 100 Biggest Cities in Germany on a Map | 0 | - | 4.92 | 97,968 |
| All Cities in India with Population of 1 Million | 0 | - | 4.84 | 47,388 |
| Five Biggest Cities by Country - Extreme | 0 | - | 4.96 | 41,190 |
| Every 100k+ City in the United States on a Map | 0 | - | 4.97 | 113,519 |
| Most Populous Countries in 2050 | 0 | - | 4.91 | 222,140 |
| First Countries to Reach 5 Million People | 0 | - | 4.92 | 134,916 |
| Most Populous Modern-Day Countries in 1000 AD | 0 | - | 4.88 | 75,922 |
| Most Populous Modern-Day Countries in 1 AD | 0 | - | 4.97 | 91,154 |
| Most Populous Modern-Day Countries in 1800 AD | 0 | - | 4.93 | 67,029 |
| Most Populous Modern-Day Countries in 1500 AD | 0 | - | 4.93 | 73,298 |
| Most Populous Modern-Day Countries by Century | 0 | - | 4.98 | 96,894 |
| Countries with the Highest Population Density | 0 | - | 4.95 | 164,591 |
| Countries with the Lowest Population Density | 0 | - | 4.98 | 169,686 |
| Biggest Cities in Europe - Extreme | 0 | - | 4.73 | 73,293 |
| Biggest Mediterranean Cities | 0 | - | 4.61 | 91,191 |
| European Cities in the Top 200 Worldwide | 0 | - | 4.56 | 49,393 |
| Cities of China (With Some Help) | 0 | - | 4.90 | 31,438 |
| Most Populous Islands | 0 | - | 4.80 | 122,665 |
| Islands by Largest City #1 | 0 | - | 4.47 | 94,257 |
| Islands by Largest City #2 | 0 | - | 4.74 | 35,474 |
| Top 10 Most Populous European Countries | 0 | - | 4.97 | 231,948 |
| Top 10 Most Populous Asian Countries | 0 | - | 4.96 | 182,780 |
| Top 10 Most Populous African Countries | 0 | - | 4.99 | 192,606 |
| Top 10 Most Densely-Populated Countries in Asia | 0 | - | 4.92 | 103,435 |
| Countries by Population Decrease | 0 | - | 4.46 | 49,720 |
| Top 10 Asian Countries by Population Increase | 0 | - | 4.93 | 108,071 |
| Flags of Countries With More Than 100 Million People | 0 | - | 4.97 | 158,874 |
| Countries Gaining the Most Population by 2070 | 0 | - | 4.63 | 64,054 |
| Five Most Populated Countries on a Multicolored World Map | 0 | - | 4.98 | 73,509 |
| Least Dense Countries Bordering Each Other | 0 | - | 4.84 | 23,213 |
| Biggest Cities with a Muslim Majority | 0 | - | 4.70 | 107,555 |
| Biggest Cities in Latin America | 0 | - | 4.47 | 64,609 |
| Biggest English Cities by Century | 0 | - | 4.90 | 106,070 |
| Five Biggest Cities by Country | 0 | - | 4.69 | 166,148 |
| Biggest Cities Near a Border | 0 | - | 4.22 | 31,835 |
| Flags to Largest Cities | 0 | - | 4.54 | 51,127 |
| Most Populous Second Cities in the U.S. | 0 | - | 4.30 | 40,884 |
| Biggest World Cities A-Z | 0 | - | 4.63 | 222,423 |
| Biggest Cities Starting With B | 0 | - | 4.34 | 162,277 |
| Biggest Cities Starting With C | 0 | - | 4.11 | 105,028 |
| Biggest Cities Starting With K | 0 | - | 4.31 | 86,870 |
| Biggest Cities Starting With S | 0 | - | 4.40 | 126,166 |
| Biggest Cities Starting With T | 0 | - | 4.29 | 127,856 |
| Most Populous Countries in 1900 | 0 | - | 4.91 | 173,416 |
| Biggest Cities in the Sun Belt on a Map | 0 | - | 4.68 | 23,531 |
| Boundary Waters | 0 | - | 4.92 | 88,290 |
| Countries Along the Afro-Eurasia Coast | 0 | - | 4.85 | 35,007 |
| The Same Suffixes - Geography | 0 | - | 4.98 | 95,716 |
| 100 Geography Questions of Varying Difficulty | 0 | - | 4.94 | 61,935 |
| "Second Best" Geography Edition #2 | 0 | - | 4.88 | 60,196 |
| Biggest Countries by Population - Shape Quiz | 0 | - | 4.91 | 57,227 |
| Countries with the Most Ascents of Mount Everest | 0 | - | 4.95 | 58,024 |
| Top 15 Most Populous Countries Ending in "IA" | 0 | - | 4.77 | 115,347 |
| Biggest European Cities by Letter | 0 | - | 4.54 | 126,457 |
| Biggest Cities in the Commonwealth of Nations | 0 | - | 4.56 | 65,415 |
| Largest World Cities With Four Letters | 0 | - | 4.36 | 51,044 |
| Biggest Cities in Germany - Extreme | 0 | - | 4.78 | 46,924 |
| U.S. Cities With Population > 1 Million | 0 | - | 4.47 | 84,675 |
| U.S. States by Second Most Populous City | 0 | - | 4.42 | 43,864 |
| Biggest "Saint" Cities - United States | 0 | - | 4.46 | 36,739 |
| Biggest Cities with a Tropical Climate | 0 | - | 4.38 | 31,961 |
| Fastest Shrinking U.S. Cities | 0 | - | 4.44 | 40,297 |
| Cities in European Economic Areas on a Map | 0 | - | 4.69 | 17,353 |
| Biggest Cities in Australia on a Map | 0 | - | 4.61 | 37,764 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,214,733 |
| Landlocked Countries | 0 | - | 4.99 | 417,297 |
| Countries Losing the Most Population by 2070 | 0 | - | 4.40 | 84,350 |
| Jewish Cities Quiz | 0 | - | 4.34 | 61,749 |
| 25 Biggest Cities of the Soviet Union | 0 | - | 4.94 | 84,264 |
| 100 Biggest US Cities in 1900 | 0 | - | 4.45 | 72,925 |
| Biggest U.S. Cities Within 200 Kilometers | 0 | - | 4.41 | 48,681 |
| Biggest U.S. Cities Within 100 Kilometers | 0 | - | 4.42 | 51,410 |
| 100 Biggest Cities in Spain on a Map | 0 | - | 4.59 | 43,727 |
| Cities in Squares on a Map - North America | 0 | - | 4.30 | 21,396 |
| Largest Nordic Cities on a Map | 0 | - | 4.77 | 36,955 |
| Cities on Interstate 90 on a Map | 0 | - | 4.45 | 32,061 |
| Biggest Urban Areas in the UK | 0 | - | 4.42 | 176,090 |
| Biggest Cities in Japan | 0 | - | 4.69 | 82,817 |
| Biggest Cities in Russia | 0 | - | 4.49 | 82,222 |
| Biggest Cities in France | 0 | - | 4.70 | 223,217 |
| Biggest Cities in Spain | 0 | - | 4.64 | 170,568 |
| Biggest Cities in The Netherlands | 0 | - | 4.50 | 55,831 |
| Biggest Cities in Poland | 0 | - | 4.63 | 53,694 |
| Biggest Cities in the UK | 0 | - | 4.48 | 104,924 |
| Biggest Cities in China | 0 | - | 4.52 | 157,887 |
| Biggest Cities in Canada | 0 | - | 4.54 | 132,520 |
| Biggest Cities in Switzerland | 0 | - | 4.52 | 47,107 |
| Biggest Cities in India | 0 | - | 4.70 | 67,554 |
| Biggest Cities in Italy | 0 | - | 4.77 | 240,411 |
| U.S. State Capitals Quiz | 0 | - | 5.00 | 1,684,128 |
| World Capitals Quiz | 0 | - | 5.00 | 5,054,406 |
