| Biggest Cities in the World | 0 | - | 4.91 | 791,666 |
| 100 Biggest Cities on a World Map | 0 | - | 4.99 | 414,169 |
| Biggest Cities in the United States | 0 | - | 4.93 | 968,246 |
| Biggest Metro Areas in the USA | 0 | - | 4.98 | 364,168 |
| Biggest U.S. Cities A-Z | 0 | - | 4.69 | 138,827 |
| Biggest City by Time Zone | 0 | - | 4.88 | 66,856 |
| Biggest City in Every Country | 0 | - | 4.98 | 98,934 |
| Five Most Populated Cities by Continent | 0 | - | 4.93 | 222,416 |
| Biggest Cities in the World - Extreme | 0 | - | 4.98 | 109,087 |
| Biggest Cities That Aren't World Capitals | 0 | - | 4.96 | 130,710 |
| Biggest Cities with Exceptions | 0 | - | 4.90 | 78,717 |
| Biggest Cities in the Southern Hemisphere | 0 | - | 4.87 | 83,663 |
| Ten Biggest Cities by Hemisphere | 0 | - | 4.96 | 78,759 |
| Biggest Cities in Deserts | 0 | - | 4.97 | 53,186 |
| Most Populous Cities as a Percent of Their Continent | 0 | - | 4.91 | 69,283 |
| Ten Southernmost Megacities | 0 | - | 4.85 | 56,839 |
| Biggest Cities in Germany | 0 | - | 4.95 | 291,634 |
| Biggest Spanish-Speaking Cities | 0 | - | 4.91 | 126,847 |
| Biggest Cities by Language | 0 | - | 4.96 | 240,828 |
| Largest City by Island | 0 | - | 4.87 | 71,157 |
| Biggest Cities in Europe in 1700 | 0 | - | 4.92 | 70,464 |
| Most Populous World Capitals | 0 | - | 4.94 | 174,691 |
| Biggest European Cities by Century | 0 | - | 4.99 | 144,457 |
| Megacities on a World Map | 0 | - | 4.98 | 251,389 |
| All 1M Cities by Proximity | 0 | - | 5.00 | 573,939 |
| 2,000 Biggest World Cities Furthest from a Larger City | 0 | - | 4.98 | 66,891 |
| All 3M Cities on the World Map | 0 | - | 4.95 | 73,984 |
| Every 1,000,000+ City on a Map | 0 | - | 4.99 | 113,026 |
| 100 Biggest Cities in Italy on a Map | 0 | - | 4.88 | 94,628 |
| 100 Biggest Cities in Germany on a Map | 0 | - | 4.91 | 97,287 |
| Biggest U.S. Cities Starting with A | 0 | - | 4.43 | 109,389 |
| Biggest U.S. Cities Starting with B | 0 | - | 4.42 | 93,574 |
| Biggest City in Each U.S. State | 0 | - | 4.84 | 167,325 |
| Biggest US Cities by Decade | 0 | - | 4.95 | 167,177 |
| Biggest Cities in Asia | 0 | - | 4.95 | 115,666 |
| Biggest Cities in Asia - Extreme | 0 | - | 4.92 | 49,620 |
| 100 Biggest Cities in Europe with a Map | 0 | - | 4.97 | 342,551 |
| Megacities on an Empty Map | 0 | - | 4.96 | 102,673 |
| African Cities in the Top 200 Worldwide | 0 | - | 4.95 | 50,392 |
| Cities of China (With Some Help) | 0 | - | 4.90 | 31,315 |
| Five Biggest World Cities by Letter #2 | 0 | - | 4.83 | 68,586 |
| Five Biggest World Cities by Letter #1 | 0 | - | 4.95 | 73,169 |
| 15 Largest Cities in Europe With a Map | 0 | - | 4.98 | 222,724 |
| 15 Largest Cities in Asia With a Map | 0 | - | 4.98 | 135,750 |
| 250 Biggest Cities in Europe With a Map | 0 | - | 4.91 | 113,975 |
| Biggest U.S. Cities Starting with C | 0 | - | 4.36 | 101,568 |
| Biggest U.S. Cities Starting with D | 0 | - | 4.16 | 106,581 |
| Biggest U.S. Cities Starting with M | 0 | - | 4.16 | 85,117 |
| Biggest U.S. Cities Starting with N | 0 | - | 4.17 | 80,165 |
| Biggest U.S. Cities Starting with O | 0 | - | 4.39 | 33,424 |
| Biggest U.S. Cities Starting with P | 0 | - | 4.04 | 67,247 |
| Biggest U.S. Cities Starting with L | 0 | - | 4.28 | 73,158 |
| Biggest U.S. Cities Starting with S | 0 | - | 4.37 | 81,384 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 325,095 |
| Biggest Cities in the U.S. - Extreme | 0 | - | 4.96 | 158,425 |
| 15 Largest Cities in North America With a Map | 0 | - | 4.98 | 46,553 |
| 15 Largest Cities in the Middle East With a Map | 0 | - | 4.92 | 117,470 |
| Biggest Cities in Each U.S. State - Extreme | 0 | - | 4.93 | 78,822 |
| 10 Biggest Cities by U.S. State | 0 | - | 4.95 | 40,939 |
| 500 Biggest U.S. Urban Areas | 0 | - | 4.90 | 115,684 |
| 100 Biggest Cities in North America on a Map | 0 | - | 4.84 | 61,621 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,436,655 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 378,034 |
| Countries With More Than 100 Million People | 0 | - | 4.99 | 164,980 |
| Five Most Populated Countries by Hemisphere | 0 | - | 4.96 | 123,207 |
| Biggest European Cities by Letter | 0 | - | 4.55 | 126,286 |
| Biggest Cities once in the Spanish Empire | 0 | - | 4.87 | 55,700 |
| 15 Largest Cities in South America With a Map | 0 | - | 4.95 | 124,509 |
| Biggest Cities in France - Extreme | 0 | - | 4.87 | 55,946 |
| Biggest Cities in Australia on a Map | 0 | - | 4.61 | 37,606 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 171,684 |
| Countries with Megacities | 0 | - | 4.99 | 247,701 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 197,535 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 112,227 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 135,926 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 80,167 |
| Biggest Cities in Europe | 0 | - | 4.70 | 542,658 |
| Second Biggest Cities by Country | 0 | - | 4.43 | 59,014 |
| Biggest Two-Word U.S. Cities | 0 | - | 4.50 | 101,926 |
| Biggest Cities by Trait #1 | 0 | - | 4.50 | 55,759 |
| Biggest City by Region | 0 | - | 4.50 | 36,024 |
| Most Populous 2nd Cities | 0 | - | 4.78 | 56,930 |
| Northernmost Major City by Country | 0 | - | 4.56 | 33,053 |
| Largest World Capitals with Exceptions | 0 | - | 4.63 | 52,244 |
| Two Largest Cities by First Two Letters | 0 | - | 4.53 | 82,960 |
| Ten Northernmost Megacities | 0 | - | 4.50 | 49,277 |
| Biggest Urban Areas in the UK | 0 | - | 4.42 | 175,873 |
| Biggest Cities in France | 0 | - | 4.69 | 222,634 |
| Biggest Cities in Spain | 0 | - | 4.63 | 170,063 |
| Biggest Cities in the UK | 0 | - | 4.47 | 104,273 |
| Biggest Cities in China | 0 | - | 4.53 | 157,259 |
| Biggest Cities in Sweden | 0 | - | 4.85 | 40,984 |
| All Cities in India with Population of 1 Million | 0 | - | 4.83 | 47,120 |
| Biggest Cities in Italy | 0 | - | 4.75 | 239,738 |
| Random Sequential Countries on the World Map | 0 | - | 5.00 | 518,999 |
| Capitals of the Most Populated Countries | 0 | - | 4.96 | 127,216 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.95 | 86,054 |
| Countries of Europe by Population | 0 | - | 4.98 | 178,411 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 266,320 |
| Most Populous Countries by Year | 0 | - | 4.83 | 109,430 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 121,061 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 111,574 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 92,845 |
| Most Populated Countries Bordering the Pacific Ocean | 0 | - | 4.96 | 95,214 |
| Most Populous Countries Bordering Each Other | 0 | - | 4.97 | 129,521 |
| Countries with the Most People Bordering Them | 0 | - | 4.98 | 107,098 |
| Populous Countries Bordering Smaller Countries | 0 | - | 4.97 | 112,520 |
| Densest Countries Bordering Each Other | 0 | - | 4.93 | 89,714 |
| Biggest English-Speaking Cities | 0 | - | 4.45 | 151,537 |
| Biggest English Cities by Century | 0 | - | 4.90 | 105,660 |
| Biggest Cities in History | 0 | - | 4.52 | 89,211 |
| Top 10 World Cities Through History | 0 | - | 4.43 | 72,161 |
| Biggest Axis-Controlled Cities | 0 | - | 4.43 | 48,649 |
| Biggest World Cities within 1,000 Km | 0 | - | 4.53 | 43,227 |
| Biggest World Cities in 1850 | 0 | - | 4.61 | 68,223 |
| All Cities in China with Population of 1 Million | 0 | - | 4.80 | 45,390 |
| Cities of Ireland | 0 | - | 4.51 | 50,378 |
| Biggest Cities Starting With A | 0 | - | 4.62 | 123,620 |
| Biggest Cities Starting With D | 0 | - | 4.51 | 116,068 |
| Biggest Cities Starting With H | 0 | - | 4.54 | 108,708 |
| Biggest Cities Starting With L | 0 | - | 4.44 | 122,018 |
| Biggest Cities Starting With M | 0 | - | 4.48 | 142,306 |
| Biggest Cities Starting With P | 0 | - | 4.46 | 126,095 |
| Most Populous Countries in 2050 | 0 | - | 4.91 | 221,641 |
| First Countries to Reach 5 Million People | 0 | - | 4.92 | 134,438 |
| Most Populous Modern-Day Countries in 1000 AD | 0 | - | 4.87 | 75,375 |
| Most Populous Modern-Day Countries in 1 AD | 0 | - | 4.97 | 83,728 |
| Most Populous Modern-Day Countries in 1800 AD | 0 | - | 4.92 | 66,649 |
| Most Populous Modern-Day Countries in 1500 AD | 0 | - | 4.93 | 72,911 |
| Most Populous Modern-Day Countries by Century | 0 | - | 4.98 | 96,337 |
| Countries with the Highest Population Density | 0 | - | 4.95 | 164,260 |
| Countries with the Lowest Population Density | 0 | - | 4.98 | 169,274 |
| Category Elimination - U.S. States #1 | 0 | - | 4.88 | 218,802 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 132,720 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 434,095 |
| Top 10 Most Populous European Countries | 0 | - | 4.97 | 231,203 |
| Top 10 Most Populous Asian Countries | 0 | - | 4.96 | 182,190 |
| Top 10 Most Populous African Countries | 0 | - | 4.99 | 192,021 |
| Top 10 Most Densely-Populated Countries in Asia | 0 | - | 4.92 | 103,096 |
| Top 10 Asian Countries by Population Increase | 0 | - | 4.93 | 107,882 |
| Flags of Countries With More Than 100 Million People | 0 | - | 4.97 | 158,536 |
| Five Most Populated Countries on a Multicolored World Map | 0 | - | 4.98 | 73,236 |
| Biggest Cities with a Muslim Majority | 0 | - | 4.69 | 107,382 |
| Fastest Growing U.S. Cities | 0 | - | 4.34 | 72,883 |
| Biggest Cities in Latin America | 0 | - | 4.48 | 64,512 |
| Biggest Coastal City by Country | 0 | - | 4.61 | 27,987 |
| Five Biggest Cities by Country | 0 | - | 4.70 | 165,804 |
| Biggest City by Region #2 | 0 | - | 4.43 | 24,686 |
| Biggest Cities by Latitude Range | 0 | - | 4.78 | 27,481 |
| 25 Biggest Cities of the Soviet Union | 0 | - | 4.95 | 84,073 |
| Top 10 Most Populous U.S. State Capitals | 0 | - | 4.48 | 63,244 |
| Biggest Cities in Europe - Extreme | 0 | - | 4.74 | 73,157 |
| Biggest Mediterranean Cities | 0 | - | 4.61 | 91,070 |
| Biggest Cities by Trait #2 | 0 | - | 4.46 | 20,278 |
| Flags to Largest Cities | 0 | - | 4.55 | 50,878 |
| European Cities in the Top 200 Worldwide | 0 | - | 4.56 | 49,050 |
| Biggest World Cities A-Z | 0 | - | 4.63 | 221,555 |
| Most Populous Countries in 1900 | 0 | - | 4.91 | 172,703 |
| 20 Random Country Flags | 0 | - | 4.99 | 605,692 |
| Most Populous Country by First Two Letters | 0 | - | 4.70 | 70,687 |
| Biggest Countries by Population - Shape Quiz | 0 | - | 4.91 | 57,020 |
| Demographics Multiple Choice | 0 | - | 4.69 | 42,120 |
| Least Dense Countries Bordering Each Other | 0 | - | 4.85 | 23,012 |
| Biggest Cities in the Commonwealth of Nations | 0 | - | 4.56 | 65,334 |
| Largest World Cities With Four Letters | 0 | - | 4.36 | 50,791 |
| 100 Biggest US Cities in 1900 | 0 | - | 4.45 | 72,804 |
| Biggest Cities in Germany - Extreme | 0 | - | 4.78 | 46,876 |
| Biggest U.S. Cities Within 200 Kilometers | 0 | - | 4.41 | 48,538 |
| U.S. Cities With Population > 1 Million | 0 | - | 4.47 | 84,352 |
| Biggest U.S. Cities Within 100 Kilometers | 0 | - | 4.42 | 51,292 |
| U.S. States by Second Most Populous City | 0 | - | 4.42 | 43,737 |
| Biggest Cities Near a Border | 0 | - | 4.22 | 31,777 |
| Biggest "Saint" Cities - United States | 0 | - | 4.46 | 36,648 |
| Biggest Cities with a Tropical Climate | 0 | - | 4.38 | 31,899 |
| Fastest Shrinking U.S. Cities | 0 | - | 4.44 | 40,195 |
| 100 Biggest Cities in Spain on a Map | 0 | - | 4.59 | 43,534 |
| Largest Nordic Cities on a Map | 0 | - | 4.77 | 36,830 |
| Biggest Cities in Japan | 0 | - | 4.68 | 82,616 |
| Biggest Cities in Russia | 0 | - | 4.49 | 82,076 |
| Biggest Cities in The Netherlands | 0 | - | 4.50 | 55,708 |
| Biggest Cities in Poland | 0 | - | 4.62 | 53,519 |
| Biggest Cities in Canada | 0 | - | 4.54 | 131,952 |
| Biggest Cities in Switzerland | 0 | - | 4.52 | 47,002 |
| Biggest Cities in India | 0 | - | 4.70 | 67,390 |
| Most Populous Second Cities in the U.S. | 0 | - | 4.30 | 40,859 |
| Biggest Cities Starting With B | 0 | - | 4.34 | 161,922 |
| Biggest Cities Starting With C | 0 | - | 4.11 | 104,812 |
| Biggest Cities Starting With K | 0 | - | 4.31 | 86,698 |
| Biggest Cities Starting With S | 0 | - | 4.40 | 125,874 |
| Biggest Cities Starting With T | 0 | - | 4.29 | 127,547 |
| Name a Valid European Capital | 0 | - | 4.95 | 151,163 |
| Random European Capital to Country | 0 | - | 4.98 | 189,406 |
| Random European Country to Capital | 0 | - | 4.92 | 147,603 |
| Random Asian Country to Capital | 0 | - | 4.92 | 95,477 |
| Random Asian Capital to Country | 0 | - | 4.97 | 101,547 |
| Random African Capital to Country | 0 | - | 4.97 | 99,802 |
| Random African Country to Capital | 0 | - | 4.94 | 70,310 |
| Countries with Four Letters - Shape Quiz | 0 | - | 4.97 | 100,937 |
| Asian Countries with the Most Christians | 0 | - | 4.85 | 96,398 |
| African Countries with the Most Christians | 0 | - | 4.94 | 74,947 |
