| Landlocked Countries | 0 | - | 4.99 | 425,939 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,884,554 |
| Sahara Desert Countries | 0 | - | 4.98 | 166,309 |
| Himalayan Countries | 0 | - | 4.93 | 140,279 |
| Andean Countries | 0 | - | 4.94 | 85,486 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 64,630 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 127,026 |
| Coffee Producing Countries | 0 | - | 4.83 | 68,197 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 66,452 |
| Danube Countries | 0 | - | 4.97 | 72,404 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 117,604 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,850 |
| Countries with the Worst Passports | 0 | - | 4.93 | 85,143 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 150,629 |
| European Landlocked Countries | 0 | - | 4.99 | 147,614 |
| Partially Recognized Countries | 0 | - | 4.98 | 107,315 |
| Countries with the Most Species | 0 | - | 4.99 | 103,571 |
| Countries 197 to 205 | 0 | - | 4.90 | 71,427 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,777 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,889 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,842 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,583 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 58,025 |
| Countries in the Alps | 0 | - | 4.87 | 118,787 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 102,646 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 107,880 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,969 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 97,032 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,968 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 96,266 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 101,417 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,872 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,429 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 63,184 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,881 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.91 | 41,749 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,565 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,805 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,899 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 119,870 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,621 |
| Countries that Host the Most Refugees | 0 | - | 4.96 | 72,689 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 46,681 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 245,749 |
| World Countries - Blind Typing | 0 | - | 5.00 | 109,171 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,510 |
| Largest Countries By Category | 0 | - | 4.97 | 158,878 |
| Countries by Countries | 0 | - | 4.96 | 63,648 |
| Country Flags with the Most White | 0 | - | 4.85 | 139,276 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,401 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,673 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 89,110 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,804,863 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 335,456 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 376,713 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 409,732 |
| Island Countries | 0 | - | 4.99 | 712,598 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,054,824 |
| Northernmost Countries | 0 | - | 4.99 | 364,045 |
| Countries of South America | 0 | - | 5.00 | 932,778 |
| Countries of Oceania | 0 | - | 5.00 | 1,063,472 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,889,529 |
| "Land" Countries | 0 | - | 4.98 | 338,405 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 175,177 |
| Countries with Megacities | 0 | - | 4.99 | 267,151 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 200,866 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 114,137 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 139,176 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 82,251 |
| Countries by Official Language | 0 | - | 4.95 | 196,011 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 297,653 |
| Countries in their Native Language | 0 | - | 4.99 | 199,750 |
| Independence from Whom | 0 | - | 4.99 | 213,081 |
| Subdivisions by Country | 0 | - | 4.87 | 50,619 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 133,456 |
| Megadiverse Countries | 0 | - | 4.96 | 135,285 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 132,955 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 55,545 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 126,681 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,232 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 164,193 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,858 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 95,122 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 154,571 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 96,058 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,258 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 78,549 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 108,382 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,448 |
| Countries with the Highest HDI | 0 | - | 4.95 | 137,150 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,586 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,865 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,393,857 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 112,380 |
| World Map Quiz | 0 | - | 4.81 | 65,741 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 159,300 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,719 |
| Countries by Founding Story | 0 | - | 4.95 | 77,803 |
| Countries by Road Signs | 0 | - | 4.98 | 54,352 |
| Southernmost Countries of the World | 0 | - | 4.99 | 229,272 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 106,094 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 123,570 |
| Countries With the Most Languages | 0 | - | 4.90 | 203,597 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.96 | 111,443 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 94,545 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,739 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,697 |
| Tallest Countries North to South | 0 | - | 4.86 | 130,735 |
| Widest Countries East to West | 0 | - | 4.92 | 130,466 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,601 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 187,271 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,522 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 95,070 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,983 |
| Countries with the Most Desert | 0 | - | 4.93 | 128,493 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,504 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,892 |
| Countries with Double Letters | 0 | - | 4.96 | 97,095 |
| Countries that End in N | 0 | - | 4.95 | 171,965 |
| Countries with Five Letters | 0 | - | 4.96 | 283,794 |
| Countries with Six Letters | 0 | - | 4.94 | 214,502 |
| Countries with W | 0 | - | 4.96 | 160,959 |
| Countries with Z | 0 | - | 4.98 | 292,474 |
| Countries with Letters Missing | 0 | - | 4.96 | 187,295 |
| Countries That End in U | 0 | - | 4.95 | 121,198 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 135,122 |
| Countries that End in O | 0 | - | 4.92 | 160,221 |
| Countries that End in R | 0 | - | 4.87 | 119,189 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,944 |
| Countries Ending in "IA" | 0 | - | 4.99 | 209,862 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 171,163 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,841 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 142,769 |
| Countries That End in Y | 0 | - | 4.91 | 186,095 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 198,475 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 153,283 |
| Countries that End in I | 0 | - | 4.94 | 135,322 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 184,638 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 96,062 |
| Countries That End in NIA | 0 | - | 4.92 | 110,064 |
| Countries That End in BIA | 0 | - | 4.93 | 149,581 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 167,556 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,780 |
| Countries That End in RIA | 0 | - | 4.93 | 127,061 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 111,395 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 228,603 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 134,194 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 126,634 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 92,188 |
| Add A Letter - Make a Country | 0 | - | 4.81 | 74,813 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 53,336 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,542 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,915 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,655 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,738 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 54,430 |
| Countries that End in L | 0 | - | 4.94 | 157,136 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 218,065 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,348 |
| City to Country Quiz #1 | 0 | - | 4.97 | 157,520 |
| City to Country Quiz #3 | 0 | - | 4.88 | 120,009 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 79,460 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 250,459 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 201,150 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 143,440 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 164,275 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 225,989 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 153,220 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 71,242 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,834 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 63,249 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,454,230 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 382,523 |
| One Border Countries | 0 | - | 4.98 | 471,980 |
| Top Producing Countries | 0 | - | 4.63 | 116,416 |
| ISO Country Codes | 0 | - | 4.49 | 91,681 |
| Countries on the Equator | 0 | - | 4.63 | 141,240 |
| Members of the Arab League | 0 | - | 4.77 | 75,720 |
| Countries with the Oldest Median Age | 0 | - | 4.80 | 70,065 |
| Separatist Movements | 0 | - | 4.45 | 46,046 |
| Countries with the Best Passports | 0 | - | 4.73 | 85,581 |
| Prime Meridian Countries | 0 | - | 4.69 | 59,925 |
| Next Country Alphabetically | 0 | - | 4.70 | 86,442 |
| Westernmost Countries | 0 | - | 4.43 | 62,548 |
| Easternmost Countries | 0 | - | 4.74 | 63,068 |
| Countries With the Most ISIS Fighters | 0 | - | 4.54 | 39,755 |
| Top 10 Most Famous Island Countries | 0 | - | 4.69 | 109,010 |
| Indochina Countries | 0 | - | 4.74 | 66,354 |
| Atlantic Ocean Island Countries | 0 | - | 4.56 | 64,683 |
| Countries With the Most Conflict Deaths | 0 | - | 4.62 | 96,816 |
| Highest Foreign Aid Recipients | 0 | - | 4.67 | 44,028 |
| Pacific Ocean Island Countries | 0 | - | 4.49 | 57,167 |
| Countries with the Most Traffic-Related Deaths | 0 | - | 4.74 | 48,499 |
| Countries with More Sheep than People | 0 | - | 4.48 | 32,054 |
| Countries with the Lowest Obesity Rate | 0 | - | 4.47 | 53,860 |
| Countries that are the Source of Refugees | 0 | - | 4.78 | 75,676 |
| Countries 206 to 242 | 0 | - | 4.74 | 34,077 |
| Most Populous Countries By Category | 0 | - | 4.55 | 85,689 |
| Countries with the Most Turkic People | 0 | - | 4.77 | 45,877 |
| Countries Most-Mentioned by the New York Times, 1900–2018 | 0 | - | 4.74 | 61,769 |
