| Landlocked Countries Quiz | 0 | - | 4.99 | 373,192 |
| Countries of the World Quiz | 0 | - | 5.00 | 43,606,193 |
| Sahara Desert Countries | 0 | - | 4.98 | 141,175 |
| Himalayan Countries | 0 | - | 4.95 | 118,341 |
| Andean Countries | 0 | - | 4.92 | 66,262 |
| Countries with the Oldest Median Age | 0 | - | 4.83 | 67,361 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 54,984 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 110,171 |
| Coffee Producing Countries | 0 | - | 4.81 | 58,046 |
| Countries with Shrinking Populations | 0 | - | 4.93 | 57,738 |
| Danube Countries | 0 | - | 4.97 | 59,785 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 95,458 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 80,858 |
| Countries with the Best Passports | 0 | - | 4.81 | 78,094 |
| Countries with the Worst Passports | 0 | - | 4.91 | 60,161 |
| Countries with the Most Immigrants | 0 | - | 4.89 | 134,152 |
| European Landlocked Countries | 0 | - | 4.99 | 139,739 |
| Partially Recognized Countries | 0 | - | 4.98 | 96,211 |
| Countries with the Most Species | 0 | - | 4.99 | 91,641 |
| Countries 197 to 205 | 0 | - | 4.87 | 61,698 |
| Tropic of Cancer Countries | 0 | - | 4.96 | 46,257 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 45,386 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 51,675 |
| Countries that Use the Peso | 0 | - | 4.83 | 48,838 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.87 | 69,278 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 52,700 |
| Countries in the Alps | 0 | - | 4.86 | 108,545 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 89,613 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 95,714 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 74,571 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 82,487 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.90 | 91,042 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 93,906 |
| Five Biggest Countries by Longitude | 0 | - | 4.90 | 49,008 |
| Biggest Country by Body of Water | 0 | - | 4.95 | 47,334 |
| Countries with the Most Container Port Traffic | 0 | - | 4.91 | 57,895 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.88 | 72,069 |
| Bridge and Tunnel Borders | 0 | - | 4.95 | 50,679 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.89 | 38,547 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 99,310 |
| Arctic Ocean Countries | 0 | - | 4.94 | 75,026 |
| Countries with the Most Grassland | 0 | - | 4.93 | 72,647 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 106,873 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 64,092 |
| Countries that Host the Most Refugees | 0 | - | 4.94 | 56,027 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 217,665 |
| World Countries - Blind Typing | 0 | - | 5.00 | 82,528 |
| Countries in Their Own Alphabet | 0 | - | 4.96 | 44,384 |
| Largest Countries By Category | 0 | - | 4.97 | 149,935 |
| Countries by Countries | 0 | - | 4.96 | 57,699 |
| Country Flags with the Most White | 0 | - | 4.87 | 130,127 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 60,304 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.86 | 46,005 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 82,788 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,331,694 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,404,692 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 356,562 |
| Countries with the Most Tourists Quiz | 0 | - | 4.91 | 377,424 |
| Island Countries Quiz | 0 | - | 4.99 | 685,236 |
| Biggest Countries by Area | 0 | - | 5.00 | 978,966 |
| Northernmost Countries | 0 | - | 4.99 | 339,784 |
| Countries of South America | 0 | - | 5.00 | 847,828 |
| Countries of Oceania | 0 | - | 5.00 | 958,403 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,696,497 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 155,098 |
| Countries with Megacities | 0 | - | 4.99 | 213,791 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 184,036 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.97 | 104,782 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 105,264 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.97 | 71,489 |
| Top 50 Countries by Population - In Order | 0 | - | 4.97 | 265,871 |
| Countries by Official Language | 0 | - | 4.95 | 181,882 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.90 | 278,825 |
| Countries in their Native Language | 0 | - | 4.98 | 186,837 |
| Independence from Whom | 0 | - | 4.99 | 197,300 |
| Subdivisions by Country | 0 | - | 4.86 | 48,130 |
| Who Controlled These Colonies? | 0 | - | 4.89 | 121,785 |
| Megadiverse Countries | 0 | - | 4.96 | 129,766 |
| Countries With the Most English Speakers | 0 | - | 4.90 | 117,716 |
| Countries with Multiple Big Islands | 0 | - | 4.92 | 110,118 |
| Most Desired Destinations for Potential Migrants | 0 | - | 4.83 | 49,062 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 153,841 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 58,765 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 84,819 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.94 | 148,272 |
| Countries with Multiple Populous Islands | 0 | - | 4.91 | 79,538 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 43,078 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 64,513 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 104,109 |
| Countries Furthest from the United States | 0 | - | 4.95 | 85,267 |
| Countries with the Highest HDI | 0 | - | 4.95 | 133,620 |
| Straight Shot to the Arctic Circle | 0 | - | 4.90 | 71,506 |
| Most Dispersed Island Nations | 0 | - | 4.96 | 67,905 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,223,877 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 95,392 |
| World Map Quiz | 0 | - | 4.88 | 56,150 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 130,761 |
| Smallest Countries with at Least One Border | 0 | - | 4.90 | 85,690 |
| Southernmost Countries of the World | 0 | - | 4.99 | 216,461 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 97,201 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 114,829 |
| Countries With the Most Languages | 0 | - | 4.88 | 186,595 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.93 | 91,744 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.89 | 87,399 |
| Countries with the Most Prisoners | 0 | - | 4.93 | 92,116 |
| Countries with the Most Domestic Camels | 0 | - | 4.93 | 57,610 |
| Tallest Countries North to South | 0 | - | 4.85 | 114,725 |
| Widest Countries East to West | 0 | - | 4.93 | 123,640 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 69,914 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 164,213 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 95,008 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 89,488 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 123,956 |
| Countries with the Most Desert | 0 | - | 4.93 | 122,455 |
| Countries by Contribution to UN Budget | 0 | - | 4.85 | 67,741 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.84 | 33,288 |
| Countries with Double Letters | 0 | - | 4.96 | 79,768 |
| Countries that End in N | 0 | - | 4.93 | 144,034 |
| Countries with Five Letters Quiz | 0 | - | 4.96 | 242,833 |
| Countries with Six Letters Quiz | 0 | - | 4.94 | 198,227 |
| Countries with W | 0 | - | 4.97 | 131,724 |
| Countries with Z | 0 | - | 4.98 | 273,308 |
| Countries with Letters Missing | 0 | - | 4.97 | 175,045 |
| Countries That End in U | 0 | - | 4.95 | 113,148 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 98,521 |
| Countries that End in O | 0 | - | 4.92 | 152,857 |
| Countries that End in R | 0 | - | 4.84 | 99,352 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 150,991 |
| Countries Ending in "IA" | 0 | - | 4.99 | 196,061 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 162,147 |
| Countries by Last Two Letters | 0 | - | 4.89 | 120,926 |
| Countries by First and Last Letter #2 | 0 | - | 4.95 | 134,448 |
| Countries That End in Y | 0 | - | 4.91 | 181,109 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 187,554 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.91 | 126,396 |
| Countries that End in I | 0 | - | 4.92 | 116,935 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 157,025 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 91,431 |
| Countries That End in NIA | 0 | - | 4.92 | 104,437 |
| Countries That End in BIA | 0 | - | 4.92 | 141,458 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 159,964 |
| Countries Whose Names Start with Saint | 0 | - | 4.86 | 113,861 |
| Countries That End in RIA | 0 | - | 4.89 | 104,785 |
| Most Common Words in Official Country Names | 0 | - | 4.85 | 104,933 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 212,727 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 125,928 |
| Divided Country Name Puzzle #3 | 0 | - | 4.91 | 117,582 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 4.99 | 83,593 |
| Countries With One Word and Three A's | 0 | - | 4.93 | 47,745 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 96,810 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.97 | 118,927 |
| Countries that are Free from U.S.A. | 0 | - | 4.87 | 45,654 |
| Countries with the Word "And" | 0 | - | 4.98 | 88,769 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 46,511 |
| Countries that End in L | 0 | - | 4.94 | 150,887 |
| "Land" Countries | 0 | - | 4.98 | 298,248 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 195,640 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 83,704 |
| City to Country Quiz #1 | 0 | - | 4.95 | 138,100 |
| City to Country Quiz #3 | 0 | - | 4.86 | 102,999 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 74,745 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 217,556 |
| Five Poorest Countries by Continent | 0 | - | 4.95 | 191,122 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 121,367 |
| Five Smallest Countries by Continent | 0 | - | 4.97 | 139,343 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.92 | 214,141 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 146,063 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.88 | 68,368 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.83 | 105,345 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 84,528 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 59,234 |
| Biggest Countries by Population | 0 | - | 4.99 | 1,368,554 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 361,833 |
| One Border Countries | 0 | - | 4.97 | 426,965 |
| Top-Producing Countries | 0 | - | 4.69 | 102,245 |
| Country Codes Quiz | 0 | - | 4.45 | 80,210 |
| Countries on the Equator | 0 | - | 4.74 | 136,927 |
| Members of the Arab League | 0 | - | 4.78 | 74,430 |
| Separatist Movements | 0 | - | 4.46 | 44,140 |
| Prime Meridian Countries | 0 | - | 4.69 | 58,378 |
| Next Country Alphabetically | 0 | - | 4.73 | 83,074 |
| Westernmost Countries | 0 | - | 4.49 | 48,559 |
| Easternmost Countries | 0 | - | 4.71 | 61,548 |
| Countries With the Most ISIS Fighters | 0 | - | 4.53 | 38,369 |
| Top 10 Most Famous Island Countries | 0 | - | 4.68 | 103,126 |
| Indochina Countries | 0 | - | 4.70 | 64,366 |
| Atlantic Ocean Island Countries | 0 | - | 4.55 | 63,889 |
| Countries With the Most Conflict Deaths | 0 | - | 4.65 | 93,758 |
| Highest Foreign Aid Recipients | 0 | - | 4.64 | 43,241 |
| Pacific Ocean Island Countries | 0 | - | 4.49 | 56,113 |
| Countries with the Most Traffic-Related Deaths | 0 | - | 4.74 | 47,077 |
| Countries with the Lowest Obesity Rate | 0 | - | 4.45 | 44,289 |
| Countries that are the Source of Refugees | 0 | - | 4.65 | 58,608 |
| Countries 206 to 242 | 0 | - | 4.71 | 32,313 |
| Most Populous Countries By Category | 0 | - | 4.55 | 63,479 |
| Countries with the Most Turkic People | 0 | - | 4.78 | 43,762 |
| Countries Most-Mentioned by the New York Times, 1900–2018 | 0 | - | 4.78 | 59,276 |
| Flyover Countries | 0 | - | 4.64 | 49,005 |
| Top 50 Countries by Area - In Order | 0 | - | 4.75 | 70,058 |
| Countries with the Most Coral Reefs | 0 | - | 4.70 | 38,692 |
