| World's Longest Rivers | 0 | - | 4.90 | 137,102 |
| Countries With No Rivers | 0 | - | 4.96 | 76,940 |
| Name a Valid Country on Each River | 0 | - | 4.95 | 62,319 |
| World's Longest Rivers on a Map | 0 | - | 4.91 | 87,989 |
| Rivers of Europe Quiz | 0 | - | 4.89 | 56,608 |
| Countries That Touch the Baltic Sea | 0 | - | 4.98 | 116,089 |
| North Sea Countries | 0 | - | 4.92 | 87,509 |
| Black Sea Countries | 0 | - | 4.87 | 60,664 |
| Countries That Touch the Red Sea | 0 | - | 4.90 | 65,462 |
| Caspian Sea Countries | 0 | - | 4.91 | 63,563 |
| Countries with the Shortest Coastlines | 0 | - | 4.89 | 67,289 |
| Tectonic Plates Map Quiz | 0 | - | 4.99 | 81,750 |
| Seas on the World Map | 0 | - | 4.96 | 135,577 |
| Seas of the World | 0 | - | 5.00 | 157,508 |
| Famous Rivers | 0 | - | 4.75 | 105,091 |
| City to River #1 | 0 | - | 4.59 | 35,868 |
| Most Populous River Basins | 0 | - | 4.55 | 39,754 |
| Rivers that Flow through the Most Countries | 0 | - | 4.53 | 40,395 |
| Five Countries with the Longest Coastline by Continent | 0 | - | 4.97 | 115,672 |
| Countries Farthest From the Sea | 0 | - | 4.98 | 74,826 |
| American Countries With No Atlantic Coastline | 0 | - | 4.94 | 92,594 |
| Natural Features of Countries #1 | 0 | - | 4.87 | 83,914 |
| Countries with Fjords | 0 | - | 4.94 | 101,070 |
| Tectonic Plates on a Map | 0 | - | 4.97 | 35,762 |
| Layers of the Earth and Atmosphere | 0 | - | 4.96 | 50,578 |
| Largest Lakes in the United States on a Map | 0 | - | 4.90 | 30,038 |
| Rivers and Lakes whose Names are Countries | 0 | - | 4.95 | 45,613 |
| Countries Bordering the Four Color Seas | 0 | - | 4.92 | 23,156 |
| Rivers by City | 0 | - | 4.38 | 31,744 |
| City to River #2 - Difficult | 0 | - | 4.64 | 26,128 |
| Largest Rivers by Discharge | 0 | - | 4.54 | 16,045 |
| Draw All Country Borders and Borderless Countries | 0 | - | 4.99 | 164,453 |
| Countries with the Longest Coastline Bordering Each Other | 0 | - | 4.89 | 29,088 |
| Biggest City by River | 0 | - | 4.38 | 52,892 |
| Countries with the Longest Coastlines | 0 | - | 4.80 | 413,449 |
| Biggest Lakes in the World | 0 | - | 4.63 | 89,752 |
| Great Lakes Quiz | 0 | - | 4.80 | 50,507 |
| Cities on a Map of the Great Lakes | 0 | - | 4.41 | 44,624 |
| Landforms Fill in the Blank | 0 | - | 4.41 | 91,785 |
| Megadiverse Countries | 0 | - | 4.96 | 135,056 |
| Gulfs and Bays on the World Map | 0 | - | 4.62 | 30,311 |
| Famous Lakes Quiz | 0 | - | 4.52 | 24,031 |
| Natural Features of Countries #2 | 0 | - | 4.55 | 37,545 |
| Rivers on Borders | 0 | - | 4.02 | 22,713 |
| Geologic Time Scale | 0 | - | 4.41 | 10,040 |
| Seas that Touch the Most Countries | 0 | - | 4.63 | 96,929 |
| U.S. Cities with Landforms in The Name | 0 | - | 4.27 | 70,822 |
| Atlantic Ocean General Knowledge | 0 | - | 4.74 | 21,260 |
| Indian Ocean General Knowledge | 0 | - | 4.52 | 22,259 |
| Bodies of Water by Cities | 0 | - | 4.77 | 28,664 |
| Capital Cities by Body of Water | 0 | - | 4.85 | 57,742 |
| Landforms by Description Quiz | 0 | - | 4.33 | 26,026 |
| Boundary Waters | 0 | - | 4.92 | 88,600 |
| Countries Along the Afro-Eurasia Coast | 0 | - | 4.86 | 35,270 |
| The Same Suffixes - Geography | 0 | - | 4.98 | 96,324 |
| 100 Geography Questions of Varying Difficulty | 0 | - | 4.93 | 62,794 |
| "Second Best" Geography Edition #2 | 0 | - | 4.88 | 60,659 |
| "Second Best" Geography Edition #3 | 0 | - | 4.89 | 70,619 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,619,162 |
| Landlocked Countries | 0 | - | 4.99 | 422,438 |
| Save Humanity by Guessing Countries | 0 | - | 4.98 | 578,370 |
| World Geography on a Map #1 | 0 | - | 4.94 | 73,729 |
| Geography Tile Select Quiz | 0 | - | 4.98 | 96,064 |
| Countries With More Than 100 Million People | 0 | - | 4.99 | 166,474 |
| Five Most Populated Countries by Hemisphere | 0 | - | 4.96 | 124,487 |
| World Capitals Quiz | 0 | - | 5.00 | 5,086,048 |
| Sahara Desert Countries | 0 | - | 4.98 | 164,750 |
| Himalayan Countries | 0 | - | 4.95 | 138,953 |
| Andean Countries | 0 | - | 4.93 | 84,749 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 63,954 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 126,023 |
| Coffee Producing Countries | 0 | - | 4.83 | 67,565 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,898 |
| Danube Countries | 0 | - | 4.97 | 72,078 |
| Countries With an "Ish" Demonym | 0 | - | 4.98 | 117,095 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,476 |
| Countries with the Worst Passports | 0 | - | 4.93 | 84,415 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 149,896 |
| European Landlocked Countries | 0 | - | 4.99 | 147,205 |
| Partially Recognized Countries | 0 | - | 4.98 | 106,736 |
| Countries with the Most Species | 0 | - | 4.99 | 103,286 |
| Countries 197 to 205 | 0 | - | 4.90 | 70,855 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,625 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,742 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,579 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,279 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,716 |
| Countries in the Alps | 0 | - | 4.87 | 118,283 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 101,412 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 107,138 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,700 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,642 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,571 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 95,989 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,730 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,552 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,205 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,908 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,683 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,556 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,268 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,524 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,582 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 119,015 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,355 |
| Countries that Host the Most Refugees | 0 | - | 4.96 | 64,335 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 46,155 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 244,176 |
| World Countries - Blind Typing | 0 | - | 5.00 | 108,266 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,271 |
| Largest Countries By Category | 0 | - | 4.97 | 158,301 |
| Countries by Countries | 0 | - | 4.96 | 63,298 |
| Country Flags with the Most White | 0 | - | 4.85 | 138,753 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,304 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,577 |
| All Countries by Population With a Map | 0 | - | 4.98 | 109,747 |
| Six Degrees of Separation - Countries #1 | 0 | - | 4.96 | 99,071 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 88,724 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,782,101 |
| Name a Valid Country Bordering Each Sea | 0 | - | 4.91 | 116,010 |
| 50 Largest Countries on the World Map Quiz | 0 | - | 4.98 | 145,747 |
| Western Europe Map Quiz | 0 | - | 4.86 | 93,869 |
| Tourist Attraction by Negative Review | 0 | - | 4.85 | 82,545 |
| Who Controls It? #1 | 0 | - | 4.83 | 48,510 |
| Rivers A-Z | 0 | - | 4.35 | 32,805 |
| Border Crossings Quiz #1 | 0 | - | 4.99 | 209,119 |
| Border Crossings Quiz #2 | 0 | - | 4.99 | 128,330 |
| Longest International Borders | 0 | - | 4.99 | 265,271 |
| Countries with Three Borders | 0 | - | 4.96 | 36,629 |
| Country Connect by Northernmost Point | 0 | - | 4.96 | 42,147 |
| Largest Cities for each Latitude Degree | 0 | - | 4.99 | 48,253 |
| Countries with the Lowest Maximum Elevation | 0 | - | 4.85 | 37,085 |
| Demonym of Every Country | 0 | - | 4.91 | 60,819 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 331,944 |
| Europe Capitals Quiz | 0 | - | 5.00 | 1,591,692 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 375,635 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 407,634 |
| Island Countries | 0 | - | 4.99 | 711,201 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,384,817 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,050,430 |
| Northernmost Countries | 0 | - | 4.99 | 362,177 |
| Countries of South America | 0 | - | 5.00 | 928,018 |
| Countries of Oceania | 0 | - | 5.00 | 1,057,767 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,878,739 |
| "Land" Countries | 0 | - | 4.98 | 337,468 |
| Europe Map Quiz | 0 | - | 5.00 | 4,772,777 |
| All Country Flags of the World | 0 | - | 5.00 | 3,683,155 |
| Top World Languages | 0 | - | 4.92 | 824,933 |
| Bodies of Water around the Arabian Peninsula | 0 | - | 4.74 | 36,122 |
| Analogies of Countries #1 | 0 | - | 4.89 | 68,554 |
| Name a Valid Answer - Geography | 0 | - | 4.95 | 104,610 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,448,916 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 381,147 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 174,020 |
| Countries with Megacities | 0 | - | 4.99 | 264,869 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 199,854 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,541 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 138,113 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 81,616 |
| Biggest Cities in the World | 0 | - | 4.91 | 801,464 |
| Global Cities on a World Map | 0 | - | 4.93 | 136,632 |
| Northernmost Capital Cities | 0 | - | 4.98 | 110,597 |
| Most Remote Capital Cities | 0 | - | 4.92 | 53,590 |
| Capital Cities: Ports and Saints | 0 | - | 4.96 | 45,727 |
| Capitals with the Shortest Names | 0 | - | 4.97 | 109,550 |
| Same Letter Country and Capital | 0 | - | 4.99 | 157,411 |
| Countries by Capital City | 0 | - | 5.00 | 68,704 |
| Capital Cities Based on First Two Letters | 0 | - | 4.85 | 77,410 |
| Capitals of the Largest Countries by Area | 0 | - | 4.96 | 114,854 |
| World Capitals by Proximity | 0 | - | 4.90 | 332,318 |
| Divided Capital Name Puzzle #1 | 0 | - | 4.99 | 84,447 |
| Moved Capital Cities | 0 | - | 4.96 | 74,382 |
| World Capitals with a Unique First Letter | 0 | - | 4.82 | 75,662 |
| Countries by Official Language | 0 | - | 4.95 | 195,341 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 296,502 |
| Countries in their Native Language | 0 | - | 4.99 | 199,132 |
| Independence from Whom | 0 | - | 4.99 | 212,210 |
| Subdivisions by Country | 0 | - | 4.87 | 50,448 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 132,805 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 132,181 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,385 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 126,262 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,123 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 163,193 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,623 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,535 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 154,063 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,683 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,161 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 77,766 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,916 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,230 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,990 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,378 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,515 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 111,320 |
| World Map Quiz | 0 | - | 4.81 | 65,156 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 157,523 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,394 |
| Countries within the Arctic Circle - Map Quiz | 0 | - | 4.84 | 64,184 |
