| Biggest Cities in the World | 0 | - | 4.91 | 798,964 |
| 100 Biggest Cities on a World Map | 0 | - | 4.99 | 417,699 |
| Biggest Cities in the United States | 0 | - | 4.94 | 978,533 |
| Biggest Metro Areas in the USA | 0 | - | 4.98 | 366,206 |
| Biggest U.S. Cities A-Z | 0 | - | 4.69 | 139,258 |
| Biggest City by Time Zone | 0 | - | 4.88 | 67,970 |
| Biggest City in Every Country | 0 | - | 4.98 | 100,576 |
| Five Most Populated Cities by Continent | 0 | - | 4.92 | 225,097 |
| Biggest Cities in the World - Extreme | 0 | - | 4.98 | 110,375 |
| Biggest Cities That Aren't World Capitals | 0 | - | 4.95 | 133,913 |
| Biggest Cities with Exceptions | 0 | - | 4.90 | 79,838 |
| Biggest Cities in the Southern Hemisphere | 0 | - | 4.87 | 84,539 |
| Ten Biggest Cities by Hemisphere | 0 | - | 4.96 | 79,932 |
| Biggest Cities in Deserts | 0 | - | 4.97 | 59,730 |
| Most Populous Cities as a Percent of Their Continent | 0 | - | 4.91 | 70,062 |
| Ten Southernmost Megacities | 0 | - | 4.87 | 64,525 |
| 100 Biggest Cities in the World with Exceptions | 0 | - | 4.98 | 67,649 |
| Biggest Cities in Germany | 0 | - | 4.95 | 293,505 |
| Biggest Spanish-Speaking Cities | 0 | - | 4.91 | 128,561 |
| Biggest Cities by Language | 0 | - | 4.96 | 246,417 |
| Largest City by Island | 0 | - | 4.87 | 71,877 |
| Biggest Cities in Europe in 1700 | 0 | - | 4.93 | 71,004 |
| Most Populous World Capitals | 0 | - | 4.94 | 175,968 |
| Biggest European Cities by Century | 0 | - | 4.99 | 145,536 |
| Megacities on a World Map | 0 | - | 4.98 | 254,574 |
| All 1M Cities by Proximity | 0 | - | 5.00 | 578,242 |
| 2,000 Biggest World Cities Furthest from a Larger City | 0 | - | 4.98 | 67,353 |
| All 3M Cities on the World Map | 0 | - | 4.95 | 74,951 |
| Every 1,000,000+ City on a Map | 0 | - | 4.99 | 114,693 |
| 100 Biggest Cities in Italy on a Map | 0 | - | 4.88 | 96,029 |
| All Cities in China with Population of 1 Million | 0 | - | 4.82 | 46,077 |
| 100 Biggest Cities in Germany on a Map | 0 | - | 4.92 | 98,745 |
| Biggest U.S. Cities Starting with A | 0 | - | 4.43 | 110,083 |
| Biggest U.S. Cities Starting with B | 0 | - | 4.42 | 94,152 |
| Biggest City in Each U.S. State | 0 | - | 4.85 | 168,401 |
| Biggest US Cities by Decade | 0 | - | 4.95 | 168,264 |
| Biggest Cities in Asia | 0 | - | 4.95 | 117,015 |
| Biggest Cities in Asia - Extreme | 0 | - | 4.92 | 50,098 |
| 100 Biggest Cities in Europe with a Map | 0 | - | 4.97 | 345,742 |
| Megacities on an Empty Map | 0 | - | 4.97 | 118,426 |
| African Cities in the Top 200 Worldwide | 0 | - | 4.95 | 50,994 |
| Cities of China (With Some Help) | 0 | - | 4.90 | 31,573 |
| Five Biggest World Cities by Letter #2 | 0 | - | 4.83 | 68,910 |
| Five Biggest World Cities by Letter #1 | 0 | - | 4.95 | 73,533 |
| 15 Largest Cities in Europe With a Map | 0 | - | 4.98 | 224,389 |
| 15 Largest Cities in Asia With a Map | 0 | - | 4.98 | 136,817 |
| 250 Biggest Cities in Europe With a Map | 0 | - | 4.91 | 115,362 |
| Biggest U.S. Cities Starting with C | 0 | - | 4.36 | 102,139 |
| Biggest U.S. Cities Starting with D | 0 | - | 4.16 | 107,359 |
| Biggest U.S. Cities Starting with M | 0 | - | 4.16 | 85,520 |
| Biggest U.S. Cities Starting with N | 0 | - | 4.17 | 80,581 |
| Biggest U.S. Cities Starting with O | 0 | - | 4.39 | 33,708 |
| Biggest U.S. Cities Starting with P | 0 | - | 4.04 | 67,504 |
| Biggest U.S. Cities Starting with L | 0 | - | 4.28 | 73,463 |
| Biggest U.S. Cities Starting with S | 0 | - | 4.37 | 81,686 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 330,350 |
| Biggest Cities in the U.S. - Extreme | 0 | - | 4.96 | 159,329 |
| 15 Largest Cities in North America With a Map | 0 | - | 4.98 | 47,309 |
| 15 Largest Cities in the Middle East With a Map | 0 | - | 4.92 | 118,438 |
| Biggest Cities in Each U.S. State - Extreme | 0 | - | 4.90 | 81,470 |
| 10 Biggest Cities by U.S. State | 0 | - | 4.95 | 41,820 |
| 500 Biggest U.S. Urban Areas | 0 | - | 4.90 | 116,880 |
| 100 Biggest Cities in North America on a Map | 0 | - | 4.84 | 62,257 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,445,829 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 380,368 |
| Countries With More Than 100 Million People | 0 | - | 4.99 | 165,975 |
| Five Most Populated Countries by Hemisphere | 0 | - | 4.97 | 124,188 |
| Biggest European Cities by Letter | 0 | - | 4.55 | 126,661 |
| Biggest Cities once in the Spanish Empire | 0 | - | 4.87 | 56,137 |
| 15 Largest Cities in South America With a Map | 0 | - | 4.95 | 126,127 |
| Biggest Cities in France - Extreme | 0 | - | 4.87 | 56,727 |
| Biggest Cities in Australia on a Map | 0 | - | 4.61 | 37,918 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 173,481 |
| Countries with Megacities | 0 | - | 4.99 | 263,477 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 199,321 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,260 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 137,616 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 81,294 |
| Biggest Cities in Europe | 0 | - | 4.73 | 546,408 |
| Second Biggest Cities by Country | 0 | - | 4.43 | 59,580 |
| Biggest Two-Word U.S. Cities | 0 | - | 4.50 | 102,088 |
| Biggest Cities by Trait #1 | 0 | - | 4.50 | 55,987 |
| Biggest City by Region | 0 | - | 4.50 | 36,225 |
| Most Populous 2nd Cities | 0 | - | 4.75 | 57,141 |
| Northernmost Major City by Country | 0 | - | 4.56 | 33,188 |
| Largest World Capitals with Exceptions | 0 | - | 4.64 | 52,352 |
| Two Largest Cities by First Two Letters | 0 | - | 4.53 | 83,264 |
| Ten Northernmost Megacities | 0 | - | 4.50 | 49,418 |
| Biggest Urban Areas in the UK | 0 | - | 4.43 | 176,316 |
| Biggest Cities in France | 0 | - | 4.70 | 224,019 |
| Biggest Cities in Spain | 0 | - | 4.63 | 171,163 |
| Biggest Cities in the UK | 0 | - | 4.48 | 105,257 |
| Biggest Cities in China | 0 | - | 4.53 | 158,619 |
| Biggest Cities in Sweden | 0 | - | 4.85 | 41,201 |
| All Cities in India with Population of 1 Million | 0 | - | 4.83 | 47,559 |
| Biggest Cities in Italy | 0 | - | 4.77 | 241,105 |
| Random Sequential Countries on the World Map | 0 | - | 5.00 | 522,381 |
| Capitals of the Most Populated Countries | 0 | - | 4.96 | 127,896 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.96 | 86,722 |
| Countries of Europe by Population | 0 | - | 4.98 | 180,829 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 267,825 |
| Most Populous Countries by Year | 0 | - | 4.83 | 110,637 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 121,915 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,395 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 93,547 |
| Most Populated Countries Bordering the Pacific Ocean | 0 | - | 4.97 | 95,613 |
| Most Populous Countries Bordering Each Other | 0 | - | 4.97 | 130,452 |
| Countries with the Most People Bordering Them | 0 | - | 4.98 | 107,904 |
| Populous Countries Bordering Smaller Countries | 0 | - | 4.97 | 113,162 |
| Densest Countries Bordering Each Other | 0 | - | 4.93 | 90,320 |
| Biggest English-Speaking Cities | 0 | - | 4.44 | 152,600 |
| Biggest English Cities by Century | 0 | - | 4.90 | 106,301 |
| Biggest Cities in History | 0 | - | 4.52 | 90,163 |
| Top 10 World Cities Through History | 0 | - | 4.42 | 77,505 |
| Biggest Axis-Controlled Cities | 0 | - | 4.44 | 48,879 |
| Biggest World Cities within 1,000 Km | 0 | - | 4.53 | 43,410 |
| Biggest World Cities in 1850 | 0 | - | 4.61 | 68,467 |
| Cities of Ireland | 0 | - | 4.51 | 50,661 |
| Biggest Cities Starting With A | 0 | - | 4.62 | 124,362 |
| Biggest Cities Starting With D | 0 | - | 4.52 | 116,656 |
| Biggest Cities Starting With H | 0 | - | 4.54 | 109,438 |
| Biggest Cities Starting With L | 0 | - | 4.44 | 123,010 |
| Biggest Cities Starting With M | 0 | - | 4.48 | 143,404 |
| Biggest Cities Starting With P | 0 | - | 4.46 | 127,128 |
| Most Populous Countries in 2050 | 0 | - | 4.91 | 223,009 |
| First Countries to Reach 5 Million People | 0 | - | 4.92 | 135,291 |
| Most Populous Modern-Day Countries in 1000 AD | 0 | - | 4.88 | 76,200 |
| Most Populous Modern-Day Countries in 1 AD | 0 | - | 4.98 | 92,758 |
| Most Populous Modern-Day Countries in 1800 AD | 0 | - | 4.93 | 67,254 |
| Most Populous Modern-Day Countries in 1500 AD | 0 | - | 4.93 | 73,545 |
| Most Populous Modern-Day Countries by Century | 0 | - | 4.98 | 97,256 |
| Random Sequential Countries on the World Map - Hard Version | 0 | - | 5.00 | 75,677 |
| Countries with the Highest Population Density | 0 | - | 4.95 | 164,977 |
| Countries with the Lowest Population Density | 0 | - | 4.98 | 170,133 |
| Category Elimination - U.S. States #1 | 0 | - | 4.88 | 220,825 |
| Category Elimination - U.S. States #2 | 0 | - | 4.83 | 134,235 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 437,193 |
| Top 10 Most Populous European Countries | 0 | - | 4.97 | 232,910 |
| Top 10 Most Populous Asian Countries | 0 | - | 4.97 | 183,867 |
| Top 10 Most Populous African Countries | 0 | - | 4.99 | 193,344 |
| Top 10 Most Densely-Populated Countries in Asia | 0 | - | 4.92 | 103,842 |
| Top 10 Asian Countries by Population Increase | 0 | - | 4.93 | 108,436 |
| Flags of Countries With More Than 100 Million People | 0 | - | 4.97 | 159,288 |
| Five Most Populated Countries on a Multicolored World Map | 0 | - | 4.98 | 73,959 |
| Biggest Cities with a Muslim Majority | 0 | - | 4.70 | 107,766 |
| Fastest Growing U.S. Cities | 0 | - | 4.35 | 73,053 |
| Biggest Cities in Latin America | 0 | - | 4.48 | 64,755 |
| Biggest Coastal City by Country | 0 | - | 4.61 | 28,066 |
| Five Biggest Cities by Country | 0 | - | 4.69 | 166,607 |
| Biggest City by Region #2 | 0 | - | 4.43 | 24,825 |
| Biggest Cities by Latitude Range | 0 | - | 4.78 | 27,553 |
| 25 Biggest Cities of the Soviet Union | 0 | - | 4.94 | 84,499 |
| Top 10 Most Populous U.S. State Capitals | 0 | - | 4.48 | 63,417 |
| Biggest Cities in Europe - Extreme | 0 | - | 4.74 | 73,495 |
| Biggest Mediterranean Cities | 0 | - | 4.61 | 91,300 |
| Biggest Cities by Trait #2 | 0 | - | 4.47 | 20,624 |
| Flags to Largest Cities | 0 | - | 4.54 | 51,393 |
| European Cities in the Top 200 Worldwide | 0 | - | 4.70 | 66,191 |
| Biggest World Cities A-Z | 0 | - | 4.63 | 223,062 |
| Most Populous Countries in 1900 | 0 | - | 4.91 | 173,748 |
| 20 Random Country Flags | 0 | - | 4.99 | 612,588 |
| Most Populous Country by First Two Letters | 0 | - | 4.70 | 70,863 |
| Biggest Countries by Population - Shape Quiz | 0 | - | 4.91 | 57,445 |
| Demographics Multiple Choice | 0 | - | 4.70 | 42,256 |
| Least Dense Countries Bordering Each Other | 0 | - | 4.85 | 23,422 |
| Biggest Cities in the Commonwealth of Nations | 0 | - | 4.56 | 65,472 |
| Largest World Cities With Four Letters | 0 | - | 4.39 | 63,745 |
| 100 Biggest US Cities in 1900 | 0 | - | 4.45 | 73,103 |
| Biggest Cities in Germany - Extreme | 0 | - | 4.78 | 46,989 |
| Biggest U.S. Cities Within 200 Kilometers | 0 | - | 4.41 | 48,826 |
| U.S. Cities With Population > 1 Million | 0 | - | 4.44 | 88,437 |
| Biggest U.S. Cities Within 100 Kilometers | 0 | - | 4.42 | 51,558 |
| U.S. States by Second Most Populous City | 0 | - | 4.42 | 43,975 |
| Biggest Cities Near a Border | 0 | - | 4.22 | 31,947 |
| Biggest "Saint" Cities - United States | 0 | - | 4.46 | 36,838 |
| Biggest Cities with a Tropical Climate | 0 | - | 4.38 | 32,026 |
| Fastest Shrinking U.S. Cities | 0 | - | 4.44 | 40,398 |
| 100 Biggest Cities in Spain on a Map | 0 | - | 4.59 | 43,999 |
| Largest Nordic Cities on a Map | 0 | - | 4.77 | 37,094 |
| Biggest Cities in Japan | 0 | - | 4.69 | 83,102 |
| Biggest Cities in Russia | 0 | - | 4.49 | 82,426 |
| Biggest Cities in The Netherlands | 0 | - | 4.50 | 56,001 |
| Biggest Cities in Poland | 0 | - | 4.63 | 53,909 |
| Biggest Cities in Canada | 0 | - | 4.54 | 132,874 |
| Biggest Cities in Switzerland | 0 | - | 4.52 | 47,218 |
| Biggest Cities in India | 0 | - | 4.64 | 67,755 |
| Most Populous Second Cities in the U.S. | 0 | - | 4.30 | 40,931 |
| Biggest Cities Starting With B | 0 | - | 4.34 | 162,774 |
| Biggest Cities Starting With C | 0 | - | 4.11 | 105,324 |
| Biggest Cities Starting With K | 0 | - | 4.31 | 87,133 |
| Biggest Cities Starting With S | 0 | - | 4.40 | 126,603 |
| Biggest Cities Starting With T | 0 | - | 4.29 | 128,279 |
| Name a Valid European Capital | 0 | - | 4.95 | 152,397 |
| Random European Capital to Country | 0 | - | 4.98 | 190,924 |
| Random European Country to Capital | 0 | - | 4.93 | 165,133 |
| Random Asian Country to Capital | 0 | - | 4.92 | 96,453 |
| Random Asian Capital to Country | 0 | - | 4.97 | 102,763 |
| Random African Capital to Country | 0 | - | 4.97 | 100,739 |
| Random African Country to Capital | 0 | - | 4.94 | 71,217 |
| Countries with Four Letters - Shape Quiz | 0 | - | 4.97 | 101,463 |
