| Countries With No Rivers | 0 | - | 4.96 | 76,003 |
| Name a Valid Country on Each River | 0 | - | 4.96 | 61,203 |
| Capital Cities by Body of Water | 0 | - | 4.85 | 57,271 |
| Five Countries with the Longest Coastline by Continent | 0 | - | 4.97 | 114,659 |
| Countries Farthest From the Sea | 0 | - | 4.98 | 74,200 |
| African Great Lakes | 0 | - | 4.82 | 65,078 |
| American Countries With No Atlantic Coastline | 0 | - | 4.94 | 91,861 |
| Natural Features of Countries #1 | 0 | - | 4.86 | 83,351 |
| Countries with Fjords | 0 | - | 4.93 | 100,172 |
| Biggest City by River | 0 | - | 4.41 | 52,688 |
| Top 10 American Countries by Coastline | 0 | - | 4.96 | 88,056 |
| Rivers and Lakes whose Names are Countries | 0 | - | 4.95 | 45,145 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 64,768 |
| Nile River Basin Countries on a Map | 0 | - | 4.95 | 50,191 |
| Countries Bordering the Four Color Seas | 0 | - | 4.92 | 22,734 |
| Capitals by River | 0 | - | 4.55 | 48,223 |
| Name a Valid Country Bordering Each Sea | 0 | - | 4.90 | 114,695 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 38,782 |
| Countries with the Longest Coastline Bordering Each Other | 0 | - | 4.89 | 28,155 |
| Countries That Touch the Baltic Sea | 0 | - | 4.98 | 115,731 |
| North Sea Countries | 0 | - | 4.92 | 86,579 |
| Black Sea Countries | 0 | - | 4.87 | 60,317 |
| Countries That Touch the Red Sea | 0 | - | 4.90 | 65,000 |
| Caspian Sea Countries | 0 | - | 4.90 | 63,089 |
| Countries with the Shortest Coastlines | 0 | - | 4.89 | 66,938 |
| Countries with the Longest Coastlines | 0 | - | 4.81 | 411,082 |
| Rivers of the United States | 0 | - | 4.93 | 65,452 |
| Cities on a Map of the Great Lakes | 0 | - | 4.41 | 44,301 |
| Bodies of Water around the Arabian Peninsula | 0 | - | 4.74 | 35,884 |
| Independence from Whom | 0 | - | 4.99 | 209,562 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 130,648 |
| Megadiverse Countries | 0 | - | 4.97 | 133,852 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 61,965 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 92,673 |
| Countries by Founding Story | 0 | - | 4.95 | 76,478 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,116 |
| Natural Features of Countries #2 | 0 | - | 4.55 | 37,326 |
| Cities by Former Name | 0 | - | 4.84 | 90,911 |
| Recently Independent Countries | 0 | - | 4.98 | 157,918 |
| Countries with Wild Tigers | 0 | - | 4.96 | 135,565 |
| Countries with Wild Penguins | 0 | - | 4.94 | 99,281 |
| Countries with the Most Venomous Animal Species | 0 | - | 4.88 | 86,388 |
| Countries of the World in 1900 | 0 | - | 4.89 | 83,389 |
| Countries of the World in 1914 with a Map | 0 | - | 4.99 | 193,013 |
| Countries of the World in 1945 with a Map | 0 | - | 5.00 | 148,690 |
| Countries by Former Name | 0 | - | 4.99 | 124,207 |
| Historical City to Country | 0 | - | 4.84 | 78,105 |
| African Great Lake Countries with an Empty Map | 0 | - | 4.97 | 60,437 |
| Asian Physical Geography | 0 | - | 4.61 | 35,364 |
| U.S. Cities with Landforms in The Name | 0 | - | 4.26 | 70,730 |
| Countries Settled by Vikings | 0 | - | 4.93 | 120,795 |
| Warsaw Pact Countries | 0 | - | 4.83 | 84,251 |
| Countries of Europe in 1444 | 0 | - | 4.92 | 98,650 |
| Countries of the World in 1444 | 0 | - | 4.98 | 59,455 |
| Modern-Day Countries of the Inca Empire on a Map | 0 | - | 4.83 | 56,835 |
| Countries of Europe before World War II with a Map | 0 | - | 4.94 | 52,222 |
| Landforms by Country | 0 | - | 4.52 | 51,911 |
| Countries with the Most Sheep | 0 | - | 4.92 | 102,359 |
| Former Flags | 0 | - | 4.97 | 106,583 |
| Mekong River Countries Empty Map Quiz | 0 | - | 4.80 | 52,961 |
| Seas of Europe | 0 | - | 4.37 | 83,795 |
| Flags of Countries of the World in 1910 | 0 | - | 4.96 | 77,971 |
| Battle to Country | 0 | - | 4.91 | 52,472 |
| Modern-Day Countries of the Umayyad Caliphate on a Map | 0 | - | 4.99 | 68,160 |
| Countries that Catch the Most Fish | 0 | - | 4.90 | 111,444 |
| Countries with the Most Wolves | 0 | - | 4.92 | 106,985 |
| Rivers A-Z | 0 | - | 4.35 | 32,672 |
| World's Longest Rivers on a Map | 0 | - | 4.91 | 86,813 |
| Rivers of Europe Quiz | 0 | - | 4.89 | 55,572 |
| Sea in the Answers | 0 | - | 4.10 | 48,522 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 148,843 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,342 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,303 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,040 |
| Ancient City to Country | 0 | - | 4.70 | 107,582 |
| City-States | 0 | - | 4.53 | 37,083 |
| Damaged and Destroyed Cities | 0 | - | 4.44 | 44,469 |
| City Where It Happened #2 | 0 | - | 4.42 | 52,949 |
| City Where It Happened #3 | 0 | - | 4.53 | 40,217 |
| Countries by Independence Day | 0 | - | 4.56 | 52,591 |
| Former Countries by Capital | 0 | - | 4.45 | 127,000 |
| Former Countries | 0 | - | 4.75 | 132,634 |
| Geological Extremes | 0 | - | 4.34 | 39,925 |
| African Physical Geography | 0 | - | 4.51 | 31,560 |
| European Physical Geography | 0 | - | 4.26 | 33,369 |
| Countries With Two or More Bear Species | 0 | - | 4.90 | 22,466 |
| Countries by Coastline Per Capita | 0 | - | 4.59 | 22,996 |
| Largest Lakes in the United States on a Map | 0 | - | 4.90 | 29,667 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 105,767 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,168 |
| Boundary Waters | 0 | - | 4.92 | 88,020 |
| Countries Along the Afro-Eurasia Coast | 0 | - | 4.85 | 34,794 |
| WWII Geography | 0 | - | 4.81 | 119,296 |
| The Same Suffixes - Geography | 0 | - | 4.98 | 95,218 |
| 100 Geography Questions of Varying Difficulty | 0 | - | 4.93 | 61,201 |
| "Second Best" Geography Edition #2 | 0 | - | 4.87 | 59,800 |
| "Second Best" Geography Edition #3 | 0 | - | 4.90 | 69,688 |
| Cities Where Famous People Died | 0 | - | 4.47 | 33,006 |
| Countries of the World Quiz | 0 | - | 5.00 | 46,879,913 |
| Landlocked Countries | 0 | - | 4.99 | 413,169 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 70,771 |
| Countries with the Most Wild Elephants | 0 | - | 4.63 | 54,599 |
| Animal Populations of Countries | 0 | - | 4.51 | 43,588 |
| Top 10 European Countries by Coastline | 0 | - | 4.89 | 137,799 |
| Top 10 Asian Countries by Coastline | 0 | - | 4.92 | 96,123 |
| Save Humanity by Guessing Countries | 0 | - | 4.98 | 551,602 |
| Countries of Europe in 1000 with a Map | 0 | - | 4.78 | 42,658 |
| Top 15 Countries with the Most Cows | 0 | - | 4.64 | 92,764 |
| Oceania Physical Geography | 0 | - | 4.30 | 12,631 |
| South American Physical Geography | 0 | - | 4.58 | 18,264 |
| Roman Provinces on a Map | 0 | - | 4.54 | 36,532 |
| World Geography on a Map #1 | 0 | - | 4.94 | 73,128 |
| Geography Tile Select Quiz | 0 | - | 4.98 | 94,948 |
| Countries With More Than 100 Million People | 0 | - | 4.99 | 164,523 |
| Five Most Populated Countries by Hemisphere | 0 | - | 4.96 | 122,883 |
| Cities by Founder and Date | 0 | - | 4.56 | 29,004 |
| City Where It Happened #1 | 0 | - | 4.24 | 106,113 |
| World Capitals Quiz | 0 | - | 5.00 | 5,028,288 |
| Sahara Desert Countries | 0 | - | 4.98 | 160,386 |
| Himalayan Countries | 0 | - | 4.95 | 135,160 |
| Andean Countries | 0 | - | 4.94 | 82,733 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 62,149 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 123,082 |
| Coffee Producing Countries | 0 | - | 4.81 | 65,820 |
| Countries with Shrinking Populations | 0 | - | 4.93 | 64,514 |
| Countries in World War I | 0 | - | 4.88 | 226,510 |
| Danube Countries | 0 | - | 4.97 | 71,033 |
| Countries With an "Ish" Demonym | 0 | - | 4.98 | 115,696 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 85,488 |
| Countries with the Worst Passports | 0 | - | 4.94 | 82,366 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 147,284 |
| European Landlocked Countries | 0 | - | 4.99 | 145,701 |
| Partially Recognized Countries | 0 | - | 4.98 | 105,112 |
| Countries with the Most Species | 0 | - | 4.99 | 95,216 |
| Axis Occupied Countries of WWII | 0 | - | 4.99 | 227,314 |
| Countries Unconquered since 1850 | 0 | - | 4.32 | 64,634 |
| Countries 197 to 205 | 0 | - | 4.89 | 69,261 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,190 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,351 |
| Countries that Use the Peso | 0 | - | 4.87 | 58,928 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.89 | 72,541 |
| Countries with a AAA Credit Rating | 0 | - | 4.85 | 56,901 |
| Countries in the Alps | 0 | - | 4.87 | 116,745 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 94,513 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 105,161 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 77,973 |
| Guerrillas by Country | 0 | - | 4.40 | 40,942 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 95,366 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 115,098 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.91 | 94,959 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 99,511 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 52,713 |
| Largest Country by Body of Water | 0 | - | 4.96 | 56,898 |
| Longest Uninterrupted Democracies | 0 | - | 4.04 | 33,091 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,008 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,179 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,014 |
| Most Recent Country To ... | 0 | - | 4.33 | 55,377 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,398 |
| Arctic Ocean Countries | 0 | - | 4.95 | 78,703 |
| Countries with the Most Grassland | 0 | - | 4.93 | 76,709 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 116,964 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 67,595 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,221 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 44,722 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 239,010 |
| World Countries - Blind Typing | 0 | - | 5.00 | 105,475 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 47,567 |
| Countries with NO Snakes | 0 | - | 4.51 | 63,503 |
| Largest Countries By Category | 0 | - | 4.97 | 156,677 |
| Countries by Countries | 0 | - | 4.96 | 62,212 |
| Country Flags with the Most White | 0 | - | 4.87 | 137,300 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 61,948 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,311 |
| Modern-Day Countries of the Khmer Empire on a Map | 0 | - | 4.74 | 45,115 |
| Modern-Day Countries of the Mayan Civilization | 0 | - | 4.77 | 32,915 |
| All Countries by Population With a Map | 0 | - | 4.98 | 106,514 |
| Six Degrees of Separation - Countries #1 | 0 | - | 4.96 | 98,044 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 87,708 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,712,553 |
| Countries with More Cows than People | 0 | - | 4.43 | 54,604 |
| 50 Largest Countries on the World Map Quiz | 0 | - | 4.98 | 144,661 |
| Western Europe Map Quiz | 0 | - | 4.87 | 93,471 |
| Tourist Attraction by Negative Review | 0 | - | 4.86 | 81,505 |
| Who Controls It? #1 | 0 | - | 4.83 | 48,222 |
| All 10m+ First-Level Country Subdivisions | 0 | - | 4.97 | 34,419 |
| Border Crossings Quiz #1 | 0 | - | 4.99 | 206,263 |
| Border Crossings Quiz #2 | 0 | - | 4.99 | 127,581 |
| Longest International Borders | 0 | - | 4.99 | 263,444 |
| Countries with Three Borders | 0 | - | 4.96 | 36,155 |
| Country Connect by Northernmost Point | 0 | - | 4.96 | 41,580 |
| Largest Cities for each Latitude Degree | 0 | - | 4.99 | 47,630 |
| Famous Immigrants and Exiles | 0 | - | 4.48 | 20,432 |
| Colonies of Africa with a Map | 0 | - | 4.77 | 53,907 |
| Countries with the Lowest Maximum Elevation | 0 | - | 4.85 | 36,846 |
| Demonym of Every Country | 0 | - | 4.91 | 58,600 |
| People Born on Islands | 0 | - | 4.39 | 52,735 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 323,354 |
| Europe Capitals Quiz | 0 | - | 5.00 | 1,569,951 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 371,964 |
