| Biggest Cities in the U.S. - Extreme | 0 | - | 4.93 | 130,356 |
| Biggest Cities in Each U.S. State - Extreme | 0 | - | 4.91 | 68,732 |
| 500 Biggest US Cities | 0 | - | 4.84 | 95,994 |
| 15 Largest Cities in South America With a Map | 0 | - | 4.94 | 90,272 |
| Biggest Cities in Asia | 0 | - | 4.94 | 94,819 |
| 100 Biggest US Cities in 1900 | 0 | - | 4.43 | 61,221 |
| Biggest Cities in Asia - Extreme | 0 | - | 4.91 | 42,852 |
| Biggest U.S. Cities Within 100 Kilometers | 0 | - | 4.46 | 37,608 |
| African Cities in the Top 200 Worldwide | 0 | - | 4.93 | 41,005 |
| First U.S. Cities to Reach 100,000 People | 0 | - | 4.70 | 55,961 |
| First U.S. States to Reach 1 Million People | 0 | - | 4.71 | 74,080 |
| 10 Biggest Cities by U.S. State | 0 | - | 4.90 | 28,271 |
| Biggest Cities in the World | 0 | - | 4.89 | 677,162 |
| 15 Largest Cities in Europe With a Map | 0 | - | 4.97 | 197,171 |
| 15 Largest Cities in Asia With a Map | 0 | - | 4.97 | 108,132 |
| 100 Biggest Cities in Europe with a Map | 0 | - | 4.97 | 300,951 |
| 250 Biggest Cities in Europe With a Map | 0 | - | 4.89 | 95,913 |
| Biggest Cities in Germany - Extreme | 0 | - | 4.82 | 43,627 |
| 15 Largest Cities in the Middle East With a Map | 0 | - | 4.92 | 90,525 |
| 100 Biggest Cities on a World Map | 0 | - | 4.99 | 366,693 |
| Biggest Cities in the United States | 0 | - | 4.92 | 807,024 |
| Biggest Metro Areas in the USA | 0 | - | 4.98 | 320,436 |
| Capitals of the Most Populated Countries | 0 | - | 4.96 | 116,177 |
| Biggest City by Time Zone | 0 | - | 4.82 | 53,183 |
| Biggest City in Every Country | 0 | - | 4.97 | 77,318 |
| Five Most Populated Cities by Continent | 0 | - | 4.95 | 166,865 |
| Biggest Cities in the World - Extreme | 0 | - | 4.98 | 90,651 |
| 10 Biggest Cities That Aren't World Capitals | 0 | - | 4.94 | 94,201 |
| Biggest Cities with Exceptions | 0 | - | 4.87 | 53,485 |
| Biggest Cities in the Southern Hemisphere | 0 | - | 4.85 | 69,925 |
| Biggest U.S. Cities Within 200 Kilometers | 0 | - | 4.37 | 36,753 |
| 100 Biggest U.S. Cities on a Map | 0 | - | 4.24 | 88,808 |
| Ten Biggest Cities by Hemisphere | 0 | - | 4.94 | 64,016 |
| Biggest Cities in Deserts | 0 | - | 4.93 | 41,926 |
| Most Populous Cities as a Percent of Their Continent | 0 | - | 4.91 | 58,937 |
| 100 Biggest Cities in the World with Exceptions | 0 | - | 4.97 | 54,267 |
| Biggest Cities in Canada | 0 | - | 4.67 | 119,431 |
| U.S. State Capitals Quiz | 0 | - | 5.00 | 1,513,698 |
| Biggest Cities once in the Spanish Empire | 0 | - | 4.87 | 50,478 |
| All 1M Cities by Proximity | 0 | - | 5.00 | 508,032 |
| Biggest Cities in France - Extreme | 0 | - | 4.88 | 42,838 |
| Biggest Cities in Germany | 0 | - | 4.94 | 260,481 |
| Biggest Spanish-Speaking Cities | 0 | - | 4.87 | 108,051 |
| Biggest Cities by Language | 0 | - | 4.95 | 212,247 |
| Biggest Cities in Europe | 0 | - | 4.76 | 455,149 |
| Biggest Cities in Europe, 1700 A.D. | 0 | - | 4.95 | 64,415 |
| Most Populous World Capitals | 0 | - | 4.92 | 146,324 |
| Biggest European Cities by Century | 0 | - | 4.97 | 117,580 |
| Megacities on a World Map | 0 | - | 4.98 | 218,882 |
| U.S. Cities With Population > 1 Million | 0 | - | 4.49 | 55,437 |
| 2,000 Biggest World Cities Furthest from a Larger City | 0 | - | 4.98 | 59,328 |
| All 3M Cities on the World Map | 0 | - | 4.95 | 62,612 |
| U.S. States by Second Most Populous City | 0 | - | 4.44 | 39,999 |
| Biggest "Saint" Cities - United States | 0 | - | 4.46 | 33,752 |
| Every 1,000,000+ City on a Map | 0 | - | 4.99 | 82,723 |
| Biggest Cities in Sweden | 0 | - | 4.83 | 36,954 |
| 100 Biggest Cities in Germany on a Map | 0 | - | 4.89 | 74,456 |
| Biggest City in Each U.S. State | 0 | - | 4.84 | 149,821 |
| Biggest US Cities by Decade | 0 | - | 4.95 | 153,556 |
| Megacities on an Empty Map | 0 | - | 4.96 | 86,678 |
| Canadian Metro Areas over 100,000 People | 0 | - | 4.45 | 28,339 |
| Cities of China (With Some Help) | 0 | - | 4.85 | 27,963 |
| Hawaiian Islands | 0 | - | 4.85 | 38,210 |
| Biggest English Cities by Century | 0 | - | 4.89 | 98,710 |
| Five Biggest World Cities by Letter #2 | 0 | - | 4.82 | 63,022 |
| Five Biggest World Cities by Letter #1 | 0 | - | 4.94 | 67,019 |
| Biggest Cities in Europe - Extreme | 0 | - | 4.79 | 68,262 |
| Biggest Mediterranean Cities | 0 | - | 4.57 | 86,132 |
| European Cities in the Top 200 Worldwide | 0 | - | 4.64 | 36,418 |
| Biggest Cities in Mexico | 0 | - | 4.54 | 28,675 |
| US States and State Capitals Quiz | 0 | - | 5.00 | 115,706 |
| Countries With More Than 100 Million People | 0 | - | 4.98 | 136,001 |
| Five Most Populated Countries by Hemisphere | 0 | - | 4.95 | 108,687 |
| Biggest Cities in Latin America Quiz | 0 | - | 4.46 | 59,938 |
| Fastest Shrinking U.S. Cities | 0 | - | 4.45 | 28,562 |
| Biggest Cities in Brazil | 0 | - | 4.55 | 47,990 |
| Saint Lucia Country Quiz | 0 | - | 4.65 | 16,118 |
| Biggest Cities in North Carolina | 0 | - | 4.66 | 31,696 |
| Biggest Countries by Population | 0 | - | 4.99 | 1,300,362 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 347,191 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 123,896 |
| Countries with Megacities | 0 | - | 4.99 | 194,333 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 169,092 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.97 | 96,671 |
| Countries With More than 200 Million People | 0 | - | 4.93 | 93,440 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.97 | 62,539 |
| Top 50 Countries by Population - In Order | 0 | - | 4.97 | 244,611 |
| 25 Biggest Cities of the Soviet Union | 0 | - | 4.96 | 70,199 |
| Top 10 Most Populous U.S. State Capitals | 0 | - | 4.47 | 52,330 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 455,437 |
| Six Flags Over Texas | 0 | - | 4.84 | 58,359 |
| Biggest Two-Word U.S. Cities | 0 | - | 4.48 | 97,265 |
| Biggest European Cities by Letter | 0 | - | 4.64 | 117,998 |
| Biggest Cities by Trait #1 | 0 | - | 4.44 | 42,849 |
| Biggest Cities in the Commonwealth of Nations | 0 | - | 4.59 | 62,688 |
| Biggest City by Region | 0 | - | 4.48 | 33,181 |
| Most Populous 2nd Cities | 0 | - | 4.72 | 52,942 |
| Largest World Capitals with Exceptions | 0 | - | 4.71 | 50,190 |
| Two Largest Cities by First Two Letters | 0 | - | 4.58 | 67,571 |
| 100 Biggest Cities in Spain on a Map | 0 | - | 4.57 | 35,395 |
| 100 Biggest Cities in North America on a Map | 0 | - | 4.79 | 51,671 |
| Ten Northernmost Megacities | 0 | - | 4.49 | 46,783 |
| Ten Southernmost Megacities | 0 | - | 4.80 | 45,960 |
| Biggest Cities in Japan | 0 | - | 4.65 | 74,818 |
| Biggest Cities in Russia | 0 | - | 4.49 | 75,845 |
| Biggest Cities in France | 0 | - | 4.76 | 197,118 |
| Biggest Cities in Spain | 0 | - | 4.50 | 152,036 |
| Biggest Cities in The Netherlands | 0 | - | 4.50 | 49,607 |
| Biggest Cities in Poland | 0 | - | 4.56 | 47,552 |
| Biggest Cities in Colombia Quiz | 0 | - | 4.41 | 12,877 |
| Biggest Cities in the UK | 0 | - | 4.45 | 92,426 |
| Biggest Cities in Australia on a Map | 0 | - | 4.61 | 32,464 |
| Biggest Cities in China | 0 | - | 4.64 | 136,496 |
| Cities of Ireland | 0 | - | 4.43 | 39,399 |
| Biggest Cities in Switzerland | 0 | - | 4.52 | 43,219 |
| Biggest Cities in India | 0 | - | 4.72 | 61,865 |
| Biggest Cities in Italy | 0 | - | 4.65 | 215,118 |
| Countries Closest to Alaska | 0 | - | 4.92 | 97,931 |
| Countries Closest to Maine | 0 | - | 4.84 | 58,203 |
| California Cities Map Quiz | 0 | - | 4.48 | 81,613 |
| Florida Cities Map Quiz | 0 | - | 4.49 | 57,164 |
| New York Cities Map Quiz | 0 | - | 4.54 | 39,458 |
| Great Plains States and Provinces on a Map | 0 | - | 4.94 | 37,091 |
| Rivers of the United States | 0 | - | 4.93 | 48,929 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.95 | 65,220 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 243,131 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 108,097 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 89,409 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.93 | 64,298 |
| Biggest English-Speaking Cities | 0 | - | 4.42 | 135,617 |
| Biggest City by Island | 0 | - | 4.57 | 45,581 |
| Biggest Cities in History | 0 | - | 4.49 | 79,341 |
| Top 10 World Cities Through History | 0 | - | 4.42 | 67,614 |
| U.S. Cities by Hispanic Population | 0 | - | 4.26 | 24,429 |
| Biggest World Cities within 1,000 Km | 0 | - | 4.50 | 39,814 |
| Biggest Cities once in the Ottoman Empire | 0 | - | 4.79 | 42,347 |
| Biggest World Cities in 1850 | 0 | - | 4.58 | 64,258 |
| 100 Biggest Cities in Italy on a Map | 0 | - | 4.74 | 63,298 |
| All Cities in China with Population of 1 Million | 0 | - | 4.77 | 37,752 |
| All Cities in India with Population of 1 Million | 0 | - | 4.79 | 40,349 |
| Biggest Cities in Washington State | 0 | - | 4.43 | 27,731 |
| Biggest Cities in California | 0 | - | 4.35 | 129,654 |
| Biggest Cities in Florida | 0 | - | 4.19 | 66,994 |
| Biggest Cities in New York State | 0 | - | 4.29 | 55,511 |
| Biggest Cities in Pennsylvania | 0 | - | 4.14 | 42,483 |
| Biggest Cities in Ohio | 0 | - | 4.36 | 45,467 |
| Biggest Cities in Texas | 0 | - | 4.26 | 110,782 |
| Biggest Cities in Wisconsin | 0 | - | 4.45 | 23,219 |
| Biggest Cities Starting With A | 0 | - | 4.55 | 110,944 |
| Biggest Cities Starting With D | 0 | - | 4.48 | 106,057 |
| Biggest Cities Starting With H | 0 | - | 4.53 | 96,609 |
| Biggest Cities Starting With L | 0 | - | 4.44 | 109,443 |
| Biggest Cities Starting With M | 0 | - | 4.50 | 127,362 |
| Biggest Cities Starting With P | 0 | - | 4.46 | 113,383 |
| Random State Capital to U.S. State | 0 | - | 4.85 | 73,374 |
| Which City in Canada? | 0 | - | 4.89 | 44,866 |
| Countries that Visit Florida the Most | 0 | - | 4.58 | 49,230 |
| Countries Closest to United States A-Z | 0 | - | 4.86 | 106,145 |
| U.S. State Shapes Quiz #2 | 0 | - | 4.82 | 90,217 |
| U.S. States that Start with M - Shape Quiz | 0 | - | 4.93 | 51,451 |
| U.S. State Flags | 0 | - | 4.87 | 133,775 |
| U.S. States that Border Canada | 0 | - | 4.90 | 164,783 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 57,587 |
| State Quiz - Florida | 0 | - | 4.43 | 55,165 |
| State Quiz - Texas | 0 | - | 4.44 | 55,606 |
| State Quiz - New York | 0 | - | 4.46 | 36,034 |
| State Quiz - California | 0 | - | 4.66 | 55,873 |
| Countries of Europe by Population | 0 | - | 4.98 | 124,231 |
| Most Populated Countries Bordering the Pacific Ocean | 0 | - | 4.97 | 78,180 |
| Most Populous Countries Bordering Each Other | 0 | - | 4.96 | 95,461 |
| Countries with the Most People Bordering Them | 0 | - | 4.95 | 74,321 |
| Populous Countries Bordering Smaller Countries | 0 | - | 4.97 | 92,458 |
| Densest Countries Bordering Each Other | 0 | - | 4.93 | 64,325 |
| Fastest Growing U.S. Cities | 0 | - | 4.36 | 69,885 |
| Second Biggest Cities Quiz | 0 | - | 4.25 | 38,828 |
| Biggest Nordic Cities | 0 | - | 4.37 | 59,503 |
| Biggest Coastal City by Country | 0 | - | 4.59 | 26,947 |
| Biggest City by Region #2 | 0 | - | 4.45 | 22,828 |
| Biggest Cities by Latitude | 0 | - | 4.76 | 26,113 |
| Largest World Cities With Four Letters | 0 | - | 4.43 | 43,027 |
| Northernmost Major City by Country | 0 | - | 4.55 | 30,648 |
| 100 Biggest Cities in New Zealand with a Map | 0 | - | 4.47 | 20,504 |
| Biggest Cities in New Zealand | 0 | - | 4.56 | 22,642 |
| Most Populous Countries in 2050 | 0 | - | 4.91 | 203,808 |
| First Countries to Reach 5 Million People | 0 | - | 4.90 | 108,719 |
| Most Populous Modern-Day Countries in 1000 AD | 0 | - | 4.85 | 68,129 |
| Most Populous Modern-Day Countries in 1 AD | 0 | - | 4.98 | 75,559 |
| Most Populous Modern-Day Countries in 1800 AD | 0 | - | 4.91 | 53,275 |
| Most Populous Modern-Day Countries in 1500 AD | 0 | - | 4.92 | 66,493 |
| Most Populous Modern-Day Countries by Century | 0 | - | 4.98 | 86,185 |
| Random U.S. State Capitals on a Map | 0 | - | 4.94 | 81,114 |
| Countries with the Highest Population Density | 0 | - | 4.93 | 142,668 |
| Countries with the Lowest Population Density | 0 | - | 4.97 | 139,033 |
| New York Counties Quiz | 0 | - | 4.59 | 39,250 |
| North Carolina Counties | 0 | - | 4.48 | 43,567 |
| Georgia Counties | 0 | - | 4.47 | 40,575 |
| Texas Counties | 0 | - | 4.50 | 62,861 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 67,493 |
| Fifty US States in One Minute | 0 | - | 4.55 | 3,211,095 |
| Category Elimination - U.S. States #1 | 0 | - | 4.91 | 192,825 |
