| Landlocked Countries | 0 | - | 4.99 | 425,133 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,838,189 |
| Sahara Desert Countries | 0 | - | 4.98 | 165,955 |
| Himalayan Countries | 0 | - | 4.93 | 139,998 |
| Andean Countries | 0 | - | 4.94 | 85,303 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 64,464 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 126,815 |
| Coffee Producing Countries | 0 | - | 4.83 | 68,035 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 66,325 |
| Danube Countries | 0 | - | 4.97 | 72,318 |
| Countries With an "Ish" Demonym | 0 | - | 4.98 | 117,488 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,762 |
| Countries with the Worst Passports | 0 | - | 4.93 | 84,986 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 150,482 |
| European Landlocked Countries | 0 | - | 4.99 | 147,536 |
| Partially Recognized Countries | 0 | - | 4.98 | 107,197 |
| Countries with the Most Species | 0 | - | 4.99 | 103,520 |
| Countries 197 to 205 | 0 | - | 4.90 | 71,327 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,744 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,854 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,791 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,525 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,960 |
| Countries in the Alps | 0 | - | 4.87 | 118,688 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 102,489 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 107,752 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,920 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,968 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,883 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 96,192 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 101,326 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,811 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,376 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 63,126 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,822 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.91 | 41,696 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,504 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,736 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,832 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 119,694 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,563 |
| Countries that Host the Most Refugees | 0 | - | 4.96 | 65,702 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 46,597 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 245,470 |
| World Countries - Blind Typing | 0 | - | 5.00 | 109,006 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,475 |
| Largest Countries By Category | 0 | - | 4.97 | 158,772 |
| Countries by Countries | 0 | - | 4.96 | 63,581 |
| Country Flags with the Most White | 0 | - | 4.85 | 139,187 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,380 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,653 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 89,043 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,800,810 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 334,978 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 376,512 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 409,390 |
| Island Countries | 0 | - | 4.99 | 712,336 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,054,123 |
| Northernmost Countries | 0 | - | 4.99 | 363,733 |
| Countries of South America | 0 | - | 5.00 | 931,853 |
| Countries of Oceania | 0 | - | 5.00 | 1,062,378 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,887,449 |
| "Land" Countries | 0 | - | 4.98 | 338,269 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 175,000 |
| Countries with Megacities | 0 | - | 4.99 | 266,823 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 200,713 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 114,029 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 139,027 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 82,152 |
| Countries by Official Language | 0 | - | 4.95 | 195,895 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 297,495 |
| Countries in their Native Language | 0 | - | 4.99 | 199,655 |
| Independence from Whom | 0 | - | 4.99 | 212,949 |
| Subdivisions by Country | 0 | - | 4.87 | 50,591 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 133,351 |
| Megadiverse Countries | 0 | - | 4.96 | 135,244 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 132,865 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 55,511 |
| Countries with Multiple Big Islands | 0 | - | 4.92 | 126,420 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,209 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 163,520 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,811 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 95,040 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 154,542 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,794 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,243 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 78,418 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 108,349 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,414 |
| Countries with the Highest HDI | 0 | - | 4.95 | 137,128 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,556 |
| Most Dispersed Island Nations | 0 | - | 4.96 | 71,665 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,392,402 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 112,204 |
| World Map Quiz | 0 | - | 4.81 | 65,599 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 158,979 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,658 |
| Countries by Founding Story | 0 | - | 4.95 | 77,755 |
| Countries by Road Signs | 0 | - | 4.98 | 54,307 |
| Southernmost Countries of the World | 0 | - | 4.99 | 229,142 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 106,003 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 123,493 |
| Countries With the Most Languages | 0 | - | 4.90 | 203,419 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.96 | 111,367 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 94,475 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,673 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,655 |
| Tallest Countries North to South | 0 | - | 4.86 | 130,536 |
| Widest Countries East to West | 0 | - | 4.92 | 130,396 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,581 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 187,189 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,496 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 95,023 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,937 |
| Countries with the Most Desert | 0 | - | 4.93 | 128,424 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,479 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,883 |
| Countries with Double Letters | 0 | - | 4.96 | 96,976 |
| Countries that End in N | 0 | - | 4.94 | 171,839 |
| Countries with Five Letters | 0 | - | 4.96 | 283,625 |
| Countries with Six Letters | 0 | - | 4.94 | 214,354 |
| Countries with W | 0 | - | 4.96 | 160,873 |
| Countries with Z | 0 | - | 4.98 | 292,326 |
| Countries with Letters Missing | 0 | - | 4.96 | 187,226 |
| Countries That End in U | 0 | - | 4.95 | 121,149 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 135,028 |
| Countries that End in O | 0 | - | 4.92 | 160,132 |
| Countries that End in R | 0 | - | 4.87 | 119,154 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,905 |
| Countries Ending in "IA" | 0 | - | 4.99 | 209,750 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 171,096 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,777 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 142,712 |
| Countries That End in Y | 0 | - | 4.91 | 186,072 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 198,392 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 153,219 |
| Countries that End in I | 0 | - | 4.94 | 135,287 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 184,557 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 96,030 |
| Countries That End in NIA | 0 | - | 4.92 | 110,019 |
| Countries That End in BIA | 0 | - | 4.93 | 149,542 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 167,475 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,734 |
| Countries That End in RIA | 0 | - | 4.93 | 127,029 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 111,341 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 228,469 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 134,111 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 126,552 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 92,120 |
| Add A Letter - Make a Country | 0 | - | 4.81 | 74,778 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 53,297 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,526 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,859 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,633 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,665 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 54,362 |
| Countries that End in L | 0 | - | 4.94 | 157,085 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 217,804 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,336 |
| City to Country Quiz #1 | 0 | - | 4.97 | 157,381 |
| City to Country Quiz #3 | 0 | - | 4.88 | 119,913 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 79,402 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 250,347 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 201,089 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 143,397 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 164,200 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 225,910 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 153,174 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 71,220 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,811 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 63,204 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,453,326 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 382,290 |
| One Border Countries | 0 | - | 4.98 | 471,710 |
| Top Producing Countries | 0 | - | 4.63 | 116,395 |
| ISO Country Codes | 0 | - | 4.49 | 91,607 |
| Countries on the Equator | 0 | - | 4.63 | 141,206 |
| Members of the Arab League | 0 | - | 4.77 | 75,710 |
| Countries with the Oldest Median Age | 0 | - | 4.80 | 70,044 |
| Separatist Movements | 0 | - | 4.45 | 46,026 |
| Countries with the Best Passports | 0 | - | 4.73 | 85,530 |
| Prime Meridian Countries | 0 | - | 4.69 | 59,908 |
| Next Country Alphabetically | 0 | - | 4.70 | 86,418 |
| Westernmost Countries | 0 | - | 4.43 | 62,537 |
| Easternmost Countries | 0 | - | 4.74 | 63,060 |
| Countries With the Most ISIS Fighters | 0 | - | 4.54 | 39,749 |
| Top 10 Most Famous Island Countries | 0 | - | 4.69 | 108,961 |
| Indochina Countries | 0 | - | 4.74 | 66,329 |
| Atlantic Ocean Island Countries | 0 | - | 4.56 | 64,675 |
| Countries With the Most Conflict Deaths | 0 | - | 4.62 | 96,799 |
| Highest Foreign Aid Recipients | 0 | - | 4.67 | 44,025 |
| Pacific Ocean Island Countries | 0 | - | 4.49 | 57,157 |
| Countries with the Most Traffic-Related Deaths | 0 | - | 4.74 | 48,484 |
| Countries with More Sheep than People | 0 | - | 4.48 | 32,013 |
| Countries with the Lowest Obesity Rate | 0 | - | 4.47 | 53,839 |
| Countries that are the Source of Refugees | 0 | - | 4.78 | 75,448 |
| Most Populous Countries By Category | 0 | - | 4.55 | 85,654 |
| Countries with the Most Turkic People | 0 | - | 4.77 | 45,852 |
| Countries Most-Mentioned by the New York Times, 1900–2018 | 0 | - | 4.74 | 61,743 |
| Flyover Countries | 0 | - | 4.69 | 50,983 |
