| Countries That Touch the Baltic Sea | 0 | - | 4.98 | 115,838 |
| North Sea Countries | 0 | - | 4.92 | 86,785 |
| Black Sea Countries | 0 | - | 4.87 | 60,439 |
| Countries That Touch the Red Sea | 0 | - | 4.90 | 65,146 |
| Caspian Sea Countries | 0 | - | 4.90 | 63,245 |
| Countries Bordering the Four Color Seas | 0 | - | 4.92 | 22,884 |
| Capital Cities by Body of Water | 0 | - | 4.85 | 57,447 |
| Countries With No Rivers | 0 | - | 4.96 | 76,217 |
| Countries with the Shortest Coastlines | 0 | - | 4.89 | 67,039 |
| Name a Valid Country on Each River | 0 | - | 4.96 | 61,511 |
| Name a Valid Country Bordering Each Sea | 0 | - | 4.90 | 115,148 |
| Five Countries with the Longest Coastline by Continent | 0 | - | 4.97 | 115,017 |
| Countries Farthest From the Sea | 0 | - | 4.98 | 74,418 |
| American Countries With No Atlantic Coastline | 0 | - | 4.94 | 92,131 |
| Natural Features of Countries #1 | 0 | - | 4.86 | 83,537 |
| Countries with Fjords | 0 | - | 4.93 | 100,465 |
| Countries with the Longest Coastline Bordering Each Other | 0 | - | 4.89 | 28,495 |
| Countries with the Longest Coastlines | 0 | - | 4.80 | 411,886 |
| Seas on the World Map | 0 | - | 4.96 | 134,729 |
| Seas of the World | 0 | - | 5.00 | 155,425 |
| Biggest City by River | 0 | - | 4.41 | 52,751 |
| Cities on a Map of the Great Lakes | 0 | - | 4.41 | 44,412 |
| Bodies of Water around the Arabian Peninsula | 0 | - | 4.74 | 35,987 |
| African Great Lakes | 0 | - | 4.82 | 65,697 |
| Seas of Europe | 0 | - | 4.37 | 84,483 |
| Independence from Whom | 0 | - | 4.99 | 210,805 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,325 |
| Megadiverse Countries | 0 | - | 4.96 | 134,537 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,211 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,581 |
| Countries by Founding Story | 0 | - | 4.95 | 76,871 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,425 |
| Natural Features of Countries #2 | 0 | - | 4.55 | 37,388 |
| Top 10 American Countries by Coastline | 0 | - | 4.96 | 88,195 |
| Rivers and Lakes whose Names are Countries | 0 | - | 4.95 | 45,290 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,127 |
| Nile River Basin Countries on a Map | 0 | - | 4.95 | 50,427 |
| Cities by Former Name | 0 | - | 4.84 | 91,259 |
| Recently Independent Countries | 0 | - | 4.98 | 158,374 |
| Countries with Wild Tigers | 0 | - | 4.96 | 136,023 |
| Countries with Wild Penguins | 0 | - | 4.94 | 99,646 |
| Countries with the Most Venomous Animal Species | 0 | - | 4.87 | 86,693 |
| Countries of the World in 1900 | 0 | - | 4.89 | 84,146 |
| Countries of the World in 1914 with a Map | 0 | - | 4.99 | 194,120 |
| Countries of the World in 1945 with a Map | 0 | - | 5.00 | 149,821 |
| Countries by Coastline Per Capita | 0 | - | 4.59 | 23,147 |
| Countries by Former Name | 0 | - | 4.99 | 124,667 |
| Historical City to Country | 0 | - | 4.84 | 78,323 |
| African Great Lake Countries with an Empty Map | 0 | - | 4.97 | 60,585 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 38,943 |
| Asian Physical Geography | 0 | - | 4.61 | 35,443 |
| Rivers of the United States | 0 | - | 4.93 | 65,825 |
| U.S. Cities with Landforms in The Name | 0 | - | 4.26 | 70,763 |
| Countries Settled by Vikings | 0 | - | 4.93 | 121,099 |
| Warsaw Pact Countries | 0 | - | 4.83 | 84,366 |
| Countries of Europe in 1444 | 0 | - | 4.92 | 99,180 |
| Countries of the World in 1444 | 0 | - | 4.98 | 59,892 |
| Modern-Day Countries of the Inca Empire on a Map | 0 | - | 4.83 | 57,125 |
| Countries of Europe before World War II with a Map | 0 | - | 4.95 | 52,777 |
| Landforms by Country | 0 | - | 4.52 | 51,939 |
| Countries with the Most Sheep | 0 | - | 4.92 | 102,744 |
| Former Flags | 0 | - | 4.97 | 107,172 |
| World's Longest Rivers | 0 | - | 4.88 | 121,809 |
| Flags of Countries of the World in 1910 | 0 | - | 4.96 | 78,420 |
| Battle to Country | 0 | - | 4.91 | 52,909 |
| Modern-Day Countries of the Umayyad Caliphate on a Map | 0 | - | 4.98 | 68,465 |
| Countries that Catch the Most Fish | 0 | - | 4.90 | 111,851 |
| Countries with the Most Wolves | 0 | - | 4.92 | 107,458 |
| World's Longest Rivers on a Map | 0 | - | 4.91 | 87,169 |
| Rivers of Europe Quiz | 0 | - | 4.89 | 55,880 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,533 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,863 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,956 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,489 |
| Ancient City to Country | 0 | - | 4.70 | 107,793 |
| City-States | 0 | - | 4.53 | 37,180 |
| Damaged and Destroyed Cities | 0 | - | 4.44 | 44,581 |
| City Where It Happened #2 | 0 | - | 4.42 | 53,040 |
| Capitals by River | 0 | - | 4.55 | 48,270 |
| Countries by Independence Day | 0 | - | 4.61 | 52,671 |
| Former Countries by Capital | 0 | - | 4.45 | 127,243 |
| Former Countries | 0 | - | 4.75 | 132,967 |
| Geological Extremes | 0 | - | 4.34 | 39,980 |
| African Physical Geography | 0 | - | 4.51 | 31,618 |
| European Physical Geography | 0 | - | 4.26 | 33,423 |
| Countries With Two or More Bear Species | 0 | - | 4.90 | 22,593 |
| Largest Lakes in the United States on a Map | 0 | - | 4.90 | 29,777 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,309 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,856 |
| Boundary Waters | 0 | - | 4.92 | 88,231 |
| Countries Along the Afro-Eurasia Coast | 0 | - | 4.85 | 34,967 |
| WWII Geography | 0 | - | 4.81 | 119,872 |
| The Same Suffixes - Geography | 0 | - | 4.98 | 95,651 |
| 100 Geography Questions of Varying Difficulty | 0 | - | 4.94 | 61,806 |
| "Second Best" Geography Edition #2 | 0 | - | 4.87 | 60,118 |
| "Second Best" Geography Edition #3 | 0 | - | 4.90 | 70,036 |
| Cities Where Famous People Died | 0 | - | 4.47 | 33,081 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,163,146 |
| Landlocked Countries | 0 | - | 4.99 | 416,645 |
| Countries with the Most Wild Elephants | 0 | - | 4.63 | 54,770 |
| Animal Populations of Countries | 0 | - | 4.52 | 43,732 |
| Save Humanity by Guessing Countries | 0 | - | 4.98 | 561,861 |
| Countries of Europe in 1000 with a Map | 0 | - | 4.78 | 42,928 |
| Top 15 Countries with the Most Cows | 0 | - | 4.64 | 92,859 |
| Oceania Physical Geography | 0 | - | 4.30 | 12,656 |
| South American Physical Geography | 0 | - | 4.58 | 18,308 |
| Roman Provinces on a Map | 0 | - | 4.54 | 36,747 |
| World Geography on a Map #1 | 0 | - | 4.94 | 73,367 |
| Geography Tile Select Quiz | 0 | - | 4.98 | 95,344 |
| Countries With More Than 100 Million People | 0 | - | 4.99 | 165,280 |
| Five Most Populated Countries by Hemisphere | 0 | - | 4.96 | 123,532 |
| Cities by Founder and Date | 0 | - | 4.56 | 29,065 |
| City Where It Happened #1 | 0 | - | 4.24 | 106,223 |
| World Capitals Quiz | 0 | - | 5.00 | 5,050,532 |
| Sahara Desert Countries | 0 | - | 4.98 | 161,931 |
| Himalayan Countries | 0 | - | 4.95 | 136,497 |
| Andean Countries | 0 | - | 4.95 | 83,489 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 62,751 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 123,996 |
| Coffee Producing Countries | 0 | - | 4.83 | 66,419 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,025 |
| Countries in World War I | 0 | - | 4.88 | 227,415 |
| Danube Countries | 0 | - | 4.97 | 71,430 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 116,216 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 85,848 |
| Countries with the Worst Passports | 0 | - | 4.94 | 83,152 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 148,119 |
| European Landlocked Countries | 0 | - | 4.99 | 146,129 |
| Partially Recognized Countries | 0 | - | 4.98 | 105,760 |
| Countries with the Most Species | 0 | - | 4.99 | 101,514 |
| Axis Occupied Countries of WWII | 0 | - | 4.99 | 228,269 |
| Countries Unconquered since 1850 | 0 | - | 4.32 | 64,721 |
| Countries 197 to 205 | 0 | - | 4.89 | 69,898 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,328 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,510 |
| Countries that Use the Peso | 0 | - | 4.88 | 59,158 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 72,809 |
| Countries with a AAA Credit Rating | 0 | - | 4.85 | 57,190 |
| Countries in the Alps | 0 | - | 4.86 | 117,324 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 94,901 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 105,891 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,253 |
| Guerrillas by Country | 0 | - | 4.40 | 41,029 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 95,740 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 115,820 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.91 | 95,254 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 99,982 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 52,993 |
| Largest Country by Body of Water | 0 | - | 4.96 | 57,802 |
| Longest Uninterrupted Democracies | 0 | - | 4.04 | 33,141 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,328 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,365 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,203 |
| Most Recent Country To ... | 0 | - | 4.33 | 55,525 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,729 |
| Arctic Ocean Countries | 0 | - | 4.95 | 78,994 |
| Countries with the Most Grassland | 0 | - | 4.93 | 77,003 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 117,711 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 67,895 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,429 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 45,245 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 241,005 |
| World Countries - Blind Typing | 0 | - | 5.00 | 106,564 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 47,826 |
| Countries with NO Snakes | 0 | - | 4.51 | 63,544 |
| Largest Countries By Category | 0 | - | 4.97 | 157,253 |
| Countries by Countries | 0 | - | 4.96 | 62,592 |
| Country Flags with the Most White | 0 | - | 4.87 | 137,870 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,080 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,409 |
| Modern-Day Countries of the Khmer Empire on a Map | 0 | - | 4.74 | 45,314 |
| Modern-Day Countries of the Mayan Civilization | 0 | - | 4.77 | 33,174 |
| All Countries by Population With a Map | 0 | - | 4.98 | 107,742 |
| Six Degrees of Separation - Countries #1 | 0 | - | 4.96 | 98,394 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 88,085 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,740,552 |
| Countries with More Cows than People | 0 | - | 4.45 | 60,995 |
| 50 Largest Countries on the World Map Quiz | 0 | - | 4.98 | 145,065 |
| Western Europe Map Quiz | 0 | - | 4.86 | 93,635 |
| Tourist Attraction by Negative Review | 0 | - | 4.86 | 81,928 |
| Who Controls It? #1 | 0 | - | 4.83 | 48,324 |
| All 10m+ First-Level Country Subdivisions | 0 | - | 4.97 | 34,614 |
| Biggest Lakes in the World | 0 | - | 4.63 | 89,166 |
| Great Lakes Quiz | 0 | - | 4.78 | 50,232 |
| Famous Rivers | 0 | - | 4.74 | 104,686 |
| City to River #1 | 0 | - | 4.59 | 35,782 |
| Rivers A-Z | 0 | - | 4.35 | 32,737 |
| Most Populous River Basins | 0 | - | 4.55 | 39,600 |
| Rivers that Flow through the Most Countries | 0 | - | 4.53 | 40,211 |
| Mekong River Countries Empty Map Quiz | 0 | - | 4.80 | 53,112 |
| Sea in the Answers | 0 | - | 4.10 | 48,692 |
| Border Crossings Quiz #1 | 0 | - | 4.99 | 207,246 |
| Border Crossings Quiz #2 | 0 | - | 4.99 | 127,844 |
| Longest International Borders | 0 | - | 4.99 | 264,298 |
| Countries with Three Borders | 0 | - | 4.96 | 36,345 |
| Country Connect by Northernmost Point | 0 | - | 4.96 | 41,778 |
| Largest Cities for each Latitude Degree | 0 | - | 4.99 | 47,872 |
| Famous Immigrants and Exiles | 0 | - | 4.45 | 23,119 |
| Colonies of Africa with a Map | 0 | - | 4.78 | 54,196 |
| Countries with the Lowest Maximum Elevation | 0 | - | 4.85 | 36,949 |
