| Countries That Touch the Baltic Sea | 0 | - | 4.98 | 116,086 |
| North Sea Countries | 0 | - | 4.92 | 87,509 |
| Black Sea Countries | 0 | - | 4.87 | 60,662 |
| Countries That Touch the Red Sea | 0 | - | 4.90 | 65,461 |
| Caspian Sea Countries | 0 | - | 4.91 | 63,562 |
| Countries Bordering the Four Color Seas | 0 | - | 4.92 | 23,156 |
| Capital Cities by Body of Water | 0 | - | 4.85 | 57,739 |
| Countries With No Rivers | 0 | - | 4.96 | 76,937 |
| Countries with the Shortest Coastlines | 0 | - | 4.89 | 67,288 |
| Name a Valid Country on Each River | 0 | - | 4.95 | 62,315 |
| Name a Valid Country Bordering Each Sea | 0 | - | 4.91 | 116,004 |
| Five Countries with the Longest Coastline by Continent | 0 | - | 4.97 | 115,670 |
| Countries Farthest From the Sea | 0 | - | 4.98 | 74,825 |
| American Countries With No Atlantic Coastline | 0 | - | 4.94 | 92,593 |
| Natural Features of Countries #1 | 0 | - | 4.87 | 83,911 |
| Countries with Fjords | 0 | - | 4.94 | 101,068 |
| Countries with the Longest Coastline Bordering Each Other | 0 | - | 4.89 | 29,081 |
| Countries with the Longest Coastlines | 0 | - | 4.80 | 413,440 |
| Seas on the World Map | 0 | - | 4.96 | 135,572 |
| Seas of the World | 0 | - | 5.00 | 157,501 |
| Cities on a Map of the Great Lakes | 0 | - | 4.41 | 44,624 |
| Bodies of Water around the Arabian Peninsula | 0 | - | 4.74 | 36,121 |
| African Great Lakes | 0 | - | 4.82 | 66,544 |
| Seas of Europe | 0 | - | 4.37 | 84,733 |
| Independence from Whom | 0 | - | 4.99 | 212,200 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 132,804 |
| Megadiverse Countries | 0 | - | 4.96 | 135,054 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,618 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,530 |
| Countries by Founding Story | 0 | - | 4.95 | 77,411 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,890 |
| Natural Features of Countries #2 | 0 | - | 4.55 | 37,544 |
| Top 10 American Countries by Coastline | 0 | - | 4.96 | 88,478 |
| Rivers and Lakes whose Names are Countries | 0 | - | 4.95 | 45,611 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,660 |
| Nile River Basin Countries on a Map | 0 | - | 4.95 | 50,777 |
| Biggest City by River | 0 | - | 4.38 | 52,892 |
| Cities by Former Name | 0 | - | 4.83 | 91,754 |
| Recently Independent Countries | 0 | - | 4.98 | 159,516 |
| Countries with Wild Tigers | 0 | - | 4.96 | 136,996 |
| Countries with Wild Penguins | 0 | - | 4.94 | 100,313 |
| Countries with the Most Venomous Animal Species | 0 | - | 4.87 | 87,323 |
| Countries of the World in 1900 | 0 | - | 4.89 | 85,316 |
| Countries of the World in 1914 with a Map | 0 | - | 4.99 | 195,857 |
| Countries of the World in 1945 with a Map | 0 | - | 5.00 | 151,395 |
| Countries by Coastline Per Capita | 0 | - | 4.59 | 23,467 |
| Countries by Former Name | 0 | - | 4.99 | 125,387 |
| Historical City to Country | 0 | - | 4.84 | 78,658 |
| African Great Lake Countries with an Empty Map | 0 | - | 4.97 | 60,831 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,250 |
| African Physical Geography | 0 | - | 4.51 | 31,749 |
| Asian Physical Geography | 0 | - | 4.61 | 35,567 |
| Rivers of the United States | 0 | - | 4.93 | 66,370 |
| U.S. Cities with Landforms in The Name | 0 | - | 4.27 | 70,822 |
| Countries Settled by Vikings | 0 | - | 4.93 | 121,791 |
| Warsaw Pact Countries | 0 | - | 4.83 | 84,573 |
| Countries of Europe in 1444 | 0 | - | 4.92 | 100,088 |
| Countries of the World in 1444 | 0 | - | 4.98 | 60,460 |
| Modern-Day Countries of the Inca Empire on a Map | 0 | - | 4.83 | 57,598 |
| Countries of Europe before World War II with a Map | 0 | - | 4.95 | 53,668 |
| Landforms by Country | 0 | - | 4.52 | 51,989 |
| Countries with the Most Sheep | 0 | - | 4.92 | 103,406 |
| Former Flags | 0 | - | 4.97 | 108,011 |
| World's Longest Rivers | 0 | - | 4.90 | 137,086 |
| Flags of Countries of the World in 1910 | 0 | - | 4.96 | 79,084 |
| Battle to Country | 0 | - | 4.91 | 53,564 |
| Modern-Day Countries of the Umayyad Caliphate on a Map | 0 | - | 4.98 | 68,946 |
| Countries that Catch the Most Fish | 0 | - | 4.90 | 112,683 |
| Countries with the Most Wolves | 0 | - | 4.92 | 108,285 |
| World's Longest Rivers on a Map | 0 | - | 4.91 | 87,985 |
| Rivers of Europe Quiz | 0 | - | 4.89 | 56,604 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,791 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 83,619 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,143 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,360 |
| Ancient City to Country | 0 | - | 4.70 | 108,158 |
| City-States | 0 | - | 4.53 | 37,313 |
| Damaged and Destroyed Cities | 0 | - | 4.44 | 44,725 |
| City Where It Happened #2 | 0 | - | 4.42 | 53,158 |
| Capitals by River | 0 | - | 4.55 | 48,347 |
| Countries by Independence Day | 0 | - | 4.61 | 52,785 |
| Former Countries by Capital | 0 | - | 4.45 | 127,619 |
| Former Countries | 0 | - | 4.75 | 133,957 |
| Geological Extremes | 0 | - | 4.34 | 40,065 |
| European Physical Geography | 0 | - | 4.26 | 33,542 |
| Countries With Two or More Bear Species | 0 | - | 4.90 | 22,798 |
| Largest Lakes in the United States on a Map | 0 | - | 4.90 | 30,038 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,121 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,047 |
| Boundary Waters | 0 | - | 4.92 | 88,598 |
| Countries Along the Afro-Eurasia Coast | 0 | - | 4.86 | 35,269 |
| WWII Geography | 0 | - | 4.81 | 120,596 |
| The Same Suffixes - Geography | 0 | - | 4.98 | 96,319 |
| 100 Geography Questions of Varying Difficulty | 0 | - | 4.93 | 62,791 |
| "Second Best" Geography Edition #2 | 0 | - | 4.88 | 60,656 |
| "Second Best" Geography Edition #3 | 0 | - | 4.89 | 70,615 |
| Cities Where Famous People Died | 0 | - | 4.47 | 33,194 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,616,358 |
| Landlocked Countries | 0 | - | 4.99 | 422,403 |
| Countries with the Most Wild Elephants | 0 | - | 4.63 | 55,043 |
| Animal Populations of Countries | 0 | - | 4.52 | 43,942 |
| Save Humanity by Guessing Countries | 0 | - | 4.98 | 578,216 |
| Countries of Europe in 1000 with a Map | 0 | - | 4.78 | 43,395 |
| Top 15 Countries with the Most Cows | 0 | - | 4.73 | 107,328 |
| Oceania Physical Geography | 0 | - | 4.30 | 12,701 |
| South American Physical Geography | 0 | - | 4.58 | 18,369 |
| Roman Provinces on a Map | 0 | - | 4.54 | 37,076 |
| World Geography on a Map #1 | 0 | - | 4.94 | 73,726 |
| Geography Tile Select Quiz | 0 | - | 4.98 | 96,062 |
| Countries With More Than 100 Million People | 0 | - | 4.99 | 166,466 |
| Five Most Populated Countries by Hemisphere | 0 | - | 4.96 | 124,480 |
| Cities by Founder and Date | 0 | - | 4.56 | 29,130 |
| City Where It Happened #1 | 0 | - | 4.23 | 106,398 |
| World Capitals Quiz | 0 | - | 5.00 | 5,085,802 |
| Sahara Desert Countries | 0 | - | 4.98 | 164,730 |
| Himalayan Countries | 0 | - | 4.95 | 138,924 |
| Andean Countries | 0 | - | 4.93 | 84,738 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 63,942 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 126,006 |
| Coffee Producing Countries | 0 | - | 4.83 | 67,553 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,889 |
| Countries in World War I | 0 | - | 4.88 | 228,520 |
| Danube Countries | 0 | - | 4.97 | 72,074 |
| Countries With an "Ish" Demonym | 0 | - | 4.98 | 117,093 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,476 |
| Countries with the Worst Passports | 0 | - | 4.93 | 84,405 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 149,889 |
| European Landlocked Countries | 0 | - | 4.99 | 147,197 |
| Partially Recognized Countries | 0 | - | 4.98 | 106,730 |
| Countries with the Most Species | 0 | - | 4.99 | 103,280 |
| Axis Occupied Countries of WWII | 0 | - | 4.99 | 229,445 |
| Countries Unconquered since 1850 | 0 | - | 4.32 | 64,882 |
| Countries 197 to 205 | 0 | - | 4.90 | 70,848 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,620 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,741 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,578 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,272 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,713 |
| Countries in the Alps | 0 | - | 4.87 | 118,279 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 101,387 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 107,124 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,696 |
| Guerrillas by Country | 0 | - | 4.40 | 41,165 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,639 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,565 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 95,985 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,724 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,547 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,204 |
| Longest Uninterrupted Democracies | 0 | - | 4.04 | 33,229 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,899 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,681 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,553 |
| Most Recent Country To ... | 0 | - | 4.33 | 55,766 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,263 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,519 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,574 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 119,005 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,351 |
| Countries that Host the Most Refugees | 0 | - | 4.96 | 64,288 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 46,149 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 244,152 |
| World Countries - Blind Typing | 0 | - | 5.00 | 108,251 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,269 |
| Countries with NO Snakes | 0 | - | 4.51 | 63,619 |
| Largest Countries By Category | 0 | - | 4.97 | 158,292 |
| Countries by Countries | 0 | - | 4.96 | 63,289 |
| Country Flags with the Most White | 0 | - | 4.85 | 138,749 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,304 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,577 |
| Modern-Day Countries of the Khmer Empire on a Map | 0 | - | 4.77 | 45,641 |
| Modern-Day Countries of the Mayan Civilization | 0 | - | 4.78 | 33,492 |
| All Countries by Population With a Map | 0 | - | 4.98 | 109,729 |
| Six Degrees of Separation - Countries #1 | 0 | - | 4.96 | 99,066 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 88,715 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,781,837 |
| Countries with More Cows than People | 0 | - | 4.45 | 61,467 |
| 50 Largest Countries on the World Map Quiz | 0 | - | 4.98 | 145,746 |
| Western Europe Map Quiz | 0 | - | 4.86 | 93,868 |
| Tourist Attraction by Negative Review | 0 | - | 4.85 | 82,543 |
| Who Controls It? #1 | 0 | - | 4.83 | 48,510 |
| All 10m+ First-Level Country Subdivisions | 0 | - | 4.98 | 34,948 |
| Biggest Lakes in the World | 0 | - | 4.63 | 89,749 |
| Great Lakes Quiz | 0 | - | 4.80 | 50,507 |
| Famous Rivers | 0 | - | 4.75 | 105,085 |
| City to River #1 | 0 | - | 4.59 | 35,868 |
| Rivers A-Z | 0 | - | 4.35 | 32,805 |
| Most Populous River Basins | 0 | - | 4.55 | 39,751 |
| Rivers that Flow through the Most Countries | 0 | - | 4.53 | 40,394 |
| Mekong River Countries Empty Map Quiz | 0 | - | 4.80 | 53,340 |
| Sea in the Answers | 0 | - | 4.08 | 49,036 |
| Border Crossings Quiz #1 | 0 | - | 4.99 | 209,106 |
| Border Crossings Quiz #2 | 0 | - | 4.99 | 128,328 |
| Longest International Borders | 0 | - | 4.99 | 265,264 |
| Countries with Three Borders | 0 | - | 4.96 | 36,627 |
| Country Connect by Northernmost Point | 0 | - | 4.96 | 42,147 |
| Largest Cities for each Latitude Degree | 0 | - | 4.99 | 48,250 |
| Famous Immigrants and Exiles | 0 | - | 4.46 | 23,564 |
| Colonies of Africa with a Map | 0 | - | 4.79 | 54,561 |
| Countries with the Lowest Maximum Elevation | 0 | - | 4.85 | 37,083 |
