| Countries That Touch the Baltic Sea | 0 | - | 4.98 | 116,094 |
| North Sea Countries | 0 | - | 4.92 | 87,523 |
| Black Sea Countries | 0 | - | 4.87 | 60,670 |
| Countries That Touch the Red Sea | 0 | - | 4.90 | 65,473 |
| Caspian Sea Countries | 0 | - | 4.91 | 63,571 |
| Seas on the World Map | 0 | - | 4.96 | 135,621 |
| Seas of the World | 0 | - | 5.00 | 157,587 |
| World's Longest Rivers | 0 | - | 4.90 | 137,172 |
| Draw All Country Borders and Borderless Countries | 0 | - | 4.99 | 164,557 |
| Countries with the Shortest Coastlines | 0 | - | 4.89 | 67,302 |
| Tectonic Plates Map Quiz | 0 | - | 4.99 | 81,796 |
| Seas that Touch the Most Countries | 0 | - | 4.63 | 96,952 |
| Natural Features of Countries #1 | 0 | - | 4.87 | 83,925 |
| Countries with Fjords | 0 | - | 4.94 | 101,089 |
| Tectonic Plates on a Map | 0 | - | 4.97 | 35,777 |
| Layers of the Earth and Atmosphere | 0 | - | 4.96 | 50,587 |
| Countries With No Rivers | 0 | - | 4.96 | 76,959 |
| Name a Valid Country on Each River | 0 | - | 4.95 | 62,358 |
| Biggest Lakes in the World | 0 | - | 4.63 | 89,771 |
| Great Lakes Quiz | 0 | - | 4.80 | 50,517 |
| Famous Rivers | 0 | - | 4.75 | 105,102 |
| City to River #1 | 0 | - | 4.59 | 35,873 |
| Most Populous River Basins | 0 | - | 4.55 | 39,759 |
| World's Longest Rivers on a Map | 0 | - | 4.90 | 88,018 |
| Rivers that Flow through the Most Countries | 0 | - | 4.53 | 40,404 |
| Rivers of Europe Quiz | 0 | - | 4.89 | 56,633 |
| Atlantic Ocean General Knowledge | 0 | - | 4.74 | 21,269 |
| Indian Ocean General Knowledge | 0 | - | 4.52 | 22,265 |
| Bodies of Water by Cities | 0 | - | 4.77 | 28,672 |
| Five Countries with the Longest Coastline by Continent | 0 | - | 4.97 | 115,705 |
| Countries Farthest From the Sea | 0 | - | 4.98 | 74,848 |
| Landforms Fill in the Blank | 0 | - | 4.41 | 91,799 |
| Largest Lakes in the United States on a Map | 0 | - | 4.90 | 30,050 |
| American Countries With No Atlantic Coastline | 0 | - | 4.94 | 92,619 |
| Megadiverse Countries | 0 | - | 4.96 | 135,080 |
| Gulfs and Bays on the World Map | 0 | - | 4.62 | 30,322 |
| Famous Lakes Quiz | 0 | - | 4.52 | 24,035 |
| Rivers by City | 0 | - | 4.38 | 31,748 |
| City to River #2 - Difficult | 0 | - | 4.64 | 26,138 |
| Largest Rivers by Discharge | 0 | - | 4.54 | 16,051 |
| Natural Features of Countries #2 | 0 | - | 4.55 | 37,559 |
| Countries Bordering the Four Color Seas | 0 | - | 4.92 | 23,169 |
| Rivers and Lakes whose Names are Countries | 0 | - | 4.95 | 45,633 |
| Geologic Time Scale | 0 | - | 4.41 | 10,044 |
| Countries with the Longest Coastline Bordering Each Other | 0 | - | 4.88 | 29,119 |
| U.S. Cities with Landforms in The Name | 0 | - | 4.27 | 70,828 |
| Cities on a Map of the Great Lakes | 0 | - | 4.41 | 44,634 |
| Countries with the Longest Coastlines | 0 | - | 4.80 | 413,518 |
| Landforms by Description Quiz | 0 | - | 4.33 | 26,027 |
| Biggest City by River | 0 | - | 4.38 | 52,907 |
| Boundary Waters | 0 | - | 4.92 | 88,614 |
| Countries Along the Afro-Eurasia Coast | 0 | - | 4.86 | 35,288 |
| The Same Suffixes - Geography | 0 | - | 4.98 | 96,363 |
| 100 Geography Questions of Varying Difficulty | 0 | - | 4.93 | 62,865 |
| "Second Best" Geography Edition #2 | 0 | - | 4.88 | 60,692 |
| "Second Best" Geography Edition #3 | 0 | - | 4.89 | 70,661 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,646,655 |
| Landlocked Countries | 0 | - | 4.99 | 422,789 |
| Save Humanity by Guessing Countries | 0 | - | 4.98 | 579,587 |
| World Geography on a Map #1 | 0 | - | 4.94 | 73,752 |
| Geography Tile Select Quiz | 0 | - | 4.98 | 96,102 |
| Countries With More Than 100 Million People | 0 | - | 4.99 | 166,521 |
| Five Most Populated Countries by Hemisphere | 0 | - | 4.97 | 124,538 |
| World Capitals Quiz | 0 | - | 5.00 | 5,088,268 |
| Sahara Desert Countries | 0 | - | 4.98 | 164,919 |
| Himalayan Countries | 0 | - | 4.95 | 139,088 |
| Andean Countries | 0 | - | 4.93 | 84,828 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 64,058 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 126,162 |
| Coffee Producing Countries | 0 | - | 4.83 | 67,635 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,953 |
| Danube Countries | 0 | - | 4.97 | 72,114 |
| Countries With an "Ish" Demonym | 0 | - | 4.98 | 117,157 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,520 |
| Countries with the Worst Passports | 0 | - | 4.93 | 84,488 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 149,985 |
| European Landlocked Countries | 0 | - | 4.99 | 147,252 |
| Partially Recognized Countries | 0 | - | 4.98 | 106,799 |
| Countries with the Most Species | 0 | - | 4.99 | 103,327 |
| Countries 197 to 205 | 0 | - | 4.90 | 70,923 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,638 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,757 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,604 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,337 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,755 |
| Countries in the Alps | 0 | - | 4.87 | 118,333 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 101,636 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 107,231 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,733 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,688 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,609 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 96,014 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,775 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,582 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,231 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,938 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,701 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,580 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,309 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,548 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,616 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 119,101 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,379 |
| Countries that Host the Most Refugees | 0 | - | 4.96 | 64,586 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 46,226 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 244,375 |
| World Countries - Blind Typing | 0 | - | 5.00 | 108,371 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,297 |
| Largest Countries By Category | 0 | - | 4.97 | 158,364 |
| Countries by Countries | 0 | - | 4.96 | 63,334 |
| Country Flags with the Most White | 0 | - | 4.85 | 138,797 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,314 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,588 |
| All Countries by Population With a Map | 0 | - | 4.99 | 109,863 |
| Six Degrees of Separation - Countries #1 | 0 | - | 4.96 | 99,105 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 88,762 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,784,404 |
| 50 Largest Countries on the World Map Quiz | 0 | - | 4.98 | 145,770 |
| Western Europe Map Quiz | 0 | - | 4.85 | 93,880 |
| Tourist Attraction by Negative Review | 0 | - | 4.85 | 82,571 |
| Who Controls It? #1 | 0 | - | 4.83 | 48,524 |
| All 10m+ First-Level Country Subdivisions | 0 | - | 4.98 | 34,969 |
| Rivers on Borders | 0 | - | 4.02 | 22,717 |
| Rivers A-Z | 0 | - | 4.35 | 32,813 |
| Border Crossings Quiz #1 | 0 | - | 4.99 | 209,211 |
| Border Crossings Quiz #2 | 0 | - | 4.99 | 128,349 |
| Longest International Borders | 0 | - | 4.99 | 265,342 |
| Countries with Three Borders | 0 | - | 4.96 | 36,645 |
| Country Connect by Northernmost Point | 0 | - | 4.96 | 42,167 |
| Largest Cities for each Latitude Degree | 0 | - | 4.99 | 48,282 |
| Countries with the Lowest Maximum Elevation | 0 | - | 4.85 | 37,093 |
| Demonym of Every Country | 0 | - | 4.91 | 60,882 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 332,338 |
| Europe Capitals Quiz | 0 | - | 5.00 | 1,592,650 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 375,753 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 407,832 |
| Island Countries | 0 | - | 4.99 | 711,327 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,385,697 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,050,908 |
| Northernmost Countries | 0 | - | 4.99 | 362,356 |
| Countries of South America | 0 | - | 5.00 | 928,511 |
| Countries of Oceania | 0 | - | 5.00 | 1,058,363 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,879,758 |
| "Land" Countries | 0 | - | 4.98 | 337,570 |
| Europe Map Quiz | 0 | - | 5.00 | 4,774,307 |
| All Country Flags of the World | 0 | - | 5.00 | 3,686,343 |
| Top World Languages | 0 | - | 4.92 | 825,554 |
| Analogies of Countries #1 | 0 | - | 4.89 | 68,586 |
| Name a Valid Answer - Geography | 0 | - | 4.95 | 104,645 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,449,510 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 381,295 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 174,139 |
| Countries with Megacities | 0 | - | 4.99 | 265,151 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 199,955 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,603 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 138,219 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 81,675 |
| Biggest Cities in the World | 0 | - | 4.91 | 802,070 |
| Global Cities on a World Map | 0 | - | 4.93 | 136,700 |
| Northernmost Capital Cities | 0 | - | 4.98 | 110,658 |
| Most Remote Capital Cities | 0 | - | 4.92 | 53,628 |
| Capital Cities: Ports and Saints | 0 | - | 4.96 | 45,769 |
| Capitals with the Shortest Names | 0 | - | 4.97 | 109,626 |
| Same Letter Country and Capital | 0 | - | 4.99 | 157,479 |
| Countries by Capital City | 0 | - | 5.00 | 68,769 |
| Capital Cities Based on First Two Letters | 0 | - | 4.85 | 77,452 |
| Capitals of the Largest Countries by Area | 0 | - | 4.97 | 114,890 |
| World Capitals by Proximity | 0 | - | 4.90 | 332,465 |
| Divided Capital Name Puzzle #1 | 0 | - | 4.99 | 84,482 |
| Moved Capital Cities | 0 | - | 4.96 | 74,403 |
| World Capitals with a Unique First Letter | 0 | - | 4.82 | 75,673 |
| Countries by Official Language | 0 | - | 4.95 | 195,419 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 296,607 |
| Countries in their Native Language | 0 | - | 4.99 | 199,201 |
| Independence from Whom | 0 | - | 4.99 | 212,292 |
| Subdivisions by Country | 0 | - | 4.87 | 50,469 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 132,870 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 132,229 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,399 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 126,277 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,135 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 163,234 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,644 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,577 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 154,397 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,700 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,174 |
| Countries by Sports League Revenue | 0 | - | 4.95 | 77,858 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,934 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,250 |
| Countries with the Highest HDI | 0 | - | 4.95 | 137,005 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,402 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,536 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 111,457 |
| World Map Quiz | 0 | - | 4.81 | 65,208 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 157,715 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,429 |
| Countries within the Arctic Circle - Map Quiz | 0 | - | 4.84 | 64,228 |
| Countries by Sports in 60 Seconds | 0 | - | 4.92 | 146,540 |
| Countries by Founding Story | 0 | - | 4.95 | 77,441 |
