| World's Longest Rivers | 0 | - | 4.89 | 133,015 |
| Countries With No Rivers | 0 | - | 4.96 | 76,553 |
| Name a Valid Country on Each River | 0 | - | 4.96 | 61,796 |
| World's Longest Rivers on a Map | 0 | - | 4.91 | 87,468 |
| Rivers of Europe Quiz | 0 | - | 4.89 | 56,120 |
| Countries That Touch the Baltic Sea | 0 | - | 4.98 | 115,938 |
| North Sea Countries | 0 | - | 4.92 | 86,915 |
| Black Sea Countries | 0 | - | 4.87 | 60,529 |
| Countries That Touch the Red Sea | 0 | - | 4.90 | 65,247 |
| Caspian Sea Countries | 0 | - | 4.90 | 63,347 |
| Countries with the Shortest Coastlines | 0 | - | 4.89 | 67,122 |
| Tectonic Plates Map Quiz | 0 | - | 4.99 | 81,066 |
| Seas on the World Map | 0 | - | 4.96 | 134,970 |
| Seas of the World | 0 | - | 5.00 | 155,974 |
| Famous Rivers | 0 | - | 4.74 | 104,792 |
| City to River #1 | 0 | - | 4.59 | 35,812 |
| Most Populous River Basins | 0 | - | 4.55 | 39,649 |
| Rivers that Flow through the Most Countries | 0 | - | 4.53 | 40,272 |
| Five Countries with the Longest Coastline by Continent | 0 | - | 4.97 | 115,224 |
| Countries Farthest From the Sea | 0 | - | 4.98 | 74,548 |
| American Countries With No Atlantic Coastline | 0 | - | 4.94 | 92,241 |
| Natural Features of Countries #1 | 0 | - | 4.87 | 83,709 |
| Countries with Fjords | 0 | - | 4.93 | 100,666 |
| Tectonic Plates on a Map | 0 | - | 4.97 | 35,548 |
| Layers of the Earth and Atmosphere | 0 | - | 4.96 | 50,364 |
| Largest Lakes in the United States on a Map | 0 | - | 4.90 | 29,850 |
| Biggest City by River | 0 | - | 4.41 | 52,798 |
| Rivers and Lakes whose Names are Countries | 0 | - | 4.95 | 45,379 |
| Countries Bordering the Four Color Seas | 0 | - | 4.92 | 22,979 |
| Rivers by City | 0 | - | 4.38 | 31,686 |
| City to River #2 - Difficult | 0 | - | 4.64 | 25,946 |
| Largest Rivers by Discharge | 0 | - | 4.54 | 15,991 |
| Draw All Country Borders and Borderless Countries | 0 | - | 4.99 | 163,046 |
| Countries with the Longest Coastline Bordering Each Other | 0 | - | 4.89 | 28,624 |
| Countries with the Longest Coastlines | 0 | - | 4.80 | 412,169 |
| Biggest Lakes in the World | 0 | - | 4.63 | 89,241 |
| Great Lakes Quiz | 0 | - | 4.78 | 50,289 |
| Cities on a Map of the Great Lakes | 0 | - | 4.41 | 44,455 |
| Landforms Fill in the Blank | 0 | - | 4.41 | 91,629 |
| Megadiverse Countries | 0 | - | 4.96 | 134,674 |
| Gulfs and Bays on the World Map | 0 | - | 4.61 | 30,165 |
| Famous Lakes Quiz | 0 | - | 4.52 | 23,977 |
| Natural Features of Countries #2 | 0 | - | 4.55 | 37,452 |
| Rivers on Borders | 0 | - | 4.02 | 22,673 |
| Geologic Time Scale | 0 | - | 4.46 | 9,987 |
| Seas that Touch the Most Countries | 0 | - | 4.63 | 96,628 |
| U.S. Cities with Landforms in The Name | 0 | - | 4.26 | 70,779 |
| Atlantic Ocean General Knowledge | 0 | - | 4.74 | 21,206 |
| Indian Ocean General Knowledge | 0 | - | 4.52 | 22,194 |
| Bodies of Water by Cities | 0 | - | 4.77 | 28,551 |
| Capital Cities by Body of Water | 0 | - | 4.85 | 57,538 |
| Landforms by Description Quiz | 0 | - | 4.33 | 26,002 |
| Boundary Waters | 0 | - | 4.92 | 88,317 |
| Countries Along the Afro-Eurasia Coast | 0 | - | 4.85 | 35,033 |
| The Same Suffixes - Geography | 0 | - | 4.98 | 95,767 |
| 100 Geography Questions of Varying Difficulty | 0 | - | 4.94 | 61,979 |
| "Second Best" Geography Edition #2 | 0 | - | 4.88 | 60,238 |
| "Second Best" Geography Edition #3 | 0 | - | 4.90 | 70,156 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,240,009 |
| Landlocked Countries | 0 | - | 4.99 | 417,568 |
| Save Humanity by Guessing Countries | 0 | - | 4.98 | 564,662 |
| World Geography on a Map #1 | 0 | - | 4.94 | 73,442 |
| Geography Tile Select Quiz | 0 | - | 4.98 | 95,481 |
| Countries With More Than 100 Million People | 0 | - | 4.99 | 165,466 |
| Five Most Populated Countries by Hemisphere | 0 | - | 4.97 | 123,701 |
| World Capitals Quiz | 0 | - | 5.00 | 5,056,439 |
| Sahara Desert Countries | 0 | - | 4.98 | 162,352 |
| Himalayan Countries | 0 | - | 4.94 | 136,874 |
| Andean Countries | 0 | - | 4.95 | 83,655 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 62,918 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 124,243 |
| Coffee Producing Countries | 0 | - | 4.83 | 66,586 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,172 |
| Danube Countries | 0 | - | 4.97 | 71,519 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 116,353 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 85,936 |
| Countries with the Worst Passports | 0 | - | 4.94 | 83,381 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 148,439 |
| European Landlocked Countries | 0 | - | 4.99 | 146,241 |
| Partially Recognized Countries | 0 | - | 4.98 | 105,938 |
| Countries with the Most Species | 0 | - | 4.99 | 102,589 |
| Countries 197 to 205 | 0 | - | 4.89 | 70,061 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,374 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,546 |
| Countries that Use the Peso | 0 | - | 4.88 | 59,222 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 72,881 |
| Countries with a AAA Credit Rating | 0 | - | 4.85 | 57,264 |
| Countries in the Alps | 0 | - | 4.86 | 117,480 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 94,998 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 106,107 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,334 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 95,836 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 115,938 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 95,357 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,113 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,074 |
| Largest Country by Body of Water | 0 | - | 4.96 | 57,882 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,423 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,416 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,264 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,823 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,086 |
| Countries with the Most Grassland | 0 | - | 4.93 | 77,097 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 117,930 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 67,967 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,492 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 45,357 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 241,599 |
| World Countries - Blind Typing | 0 | - | 5.00 | 106,873 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 47,901 |
| Largest Countries By Category | 0 | - | 4.97 | 157,429 |
| Countries by Countries | 0 | - | 4.96 | 62,709 |
| Country Flags with the Most White | 0 | - | 4.87 | 138,006 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,118 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,438 |
| All Countries by Population With a Map | 0 | - | 4.98 | 108,076 |
| Six Degrees of Separation - Countries #1 | 0 | - | 4.96 | 98,513 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 88,195 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,748,073 |
| Name a Valid Country Bordering Each Sea | 0 | - | 4.90 | 115,328 |
| 50 Largest Countries on the World Map Quiz | 0 | - | 4.98 | 145,237 |
| Western Europe Map Quiz | 0 | - | 4.86 | 93,698 |
| Tourist Attraction by Negative Review | 0 | - | 4.86 | 82,118 |
| Who Controls It? #1 | 0 | - | 4.83 | 48,359 |
| Rivers A-Z | 0 | - | 4.35 | 32,751 |
| Border Crossings Quiz #1 | 0 | - | 4.99 | 207,779 |
| Border Crossings Quiz #2 | 0 | - | 4.99 | 127,977 |
| Longest International Borders | 0 | - | 4.99 | 264,473 |
| Countries with Three Borders | 0 | - | 4.96 | 36,396 |
| Country Connect by Northernmost Point | 0 | - | 4.96 | 41,838 |
| Largest Cities for each Latitude Degree | 0 | - | 4.99 | 47,937 |
| Countries with the Lowest Maximum Elevation | 0 | - | 4.85 | 36,975 |
| Demonym of Every Country | 0 | - | 4.91 | 59,025 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 327,875 |
| Europe Capitals Quiz | 0 | - | 5.00 | 1,580,143 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 374,239 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 404,413 |
| Island Countries | 0 | - | 4.99 | 709,234 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,372,821 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,044,623 |
| Northernmost Countries | 0 | - | 4.99 | 359,902 |
| Countries of South America | 0 | - | 5.00 | 921,187 |
| Countries of Oceania | 0 | - | 5.00 | 1,048,872 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,862,212 |
| "Land" Countries | 0 | - | 4.98 | 335,408 |
| Europe Map Quiz | 0 | - | 5.00 | 4,750,247 |
| All Country Flags of the World | 0 | - | 5.00 | 3,638,663 |
| Top World Languages | 0 | - | 4.92 | 818,745 |
| Bodies of Water around the Arabian Peninsula | 0 | - | 4.74 | 36,008 |
| Analogies of Countries #1 | 0 | - | 4.88 | 68,298 |
| Name a Valid Answer - Geography | 0 | - | 4.95 | 104,004 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,441,451 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 379,248 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 172,598 |
| Countries with Megacities | 0 | - | 4.99 | 249,613 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 198,440 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 112,737 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 136,783 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 80,700 |
| Biggest Cities in the World | 0 | - | 4.91 | 795,230 |
| Global Cities on a World Map | 0 | - | 4.93 | 135,644 |
| Northernmost Capital Cities | 0 | - | 4.98 | 109,744 |
| Most Remote Capital Cities | 0 | - | 4.92 | 53,138 |
| Capital Cities: Ports and Saints | 0 | - | 4.96 | 45,163 |
| Capitals with the Shortest Names | 0 | - | 4.97 | 108,760 |
| Same Letter Country and Capital | 0 | - | 4.99 | 156,356 |
| Countries by Capital City | 0 | - | 5.00 | 67,684 |
| Capital Cities Based on First Two Letters | 0 | - | 4.85 | 76,853 |
| Capitals of the Largest Countries by Area | 0 | - | 4.97 | 114,344 |
| World Capitals by Proximity | 0 | - | 4.91 | 330,174 |
| Divided Capital Name Puzzle #1 | 0 | - | 4.99 | 83,823 |
| Moved Capital Cities | 0 | - | 4.96 | 73,957 |
| World Capitals with a Unique First Letter | 0 | - | 4.82 | 75,279 |
| Countries by Official Language | 0 | - | 4.95 | 194,390 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 295,208 |
| Countries in their Native Language | 0 | - | 4.99 | 197,958 |
| Independence from Whom | 0 | - | 4.99 | 211,056 |
| Subdivisions by Country | 0 | - | 4.86 | 50,239 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,509 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 131,093 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,132 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,688 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 74,976 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 162,557 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,293 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,771 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,693 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,431 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 44,826 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 76,573 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,640 |
| Countries Furthest from the United States | 0 | - | 4.94 | 88,740 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,703 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 74,918 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,266 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 109,838 |
| World Map Quiz | 0 | - | 4.81 | 64,295 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 154,907 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 106,872 |
| Countries within the Arctic Circle - Map Quiz | 0 | - | 4.85 | 63,637 |
