| Landlocked Countries | 0 | - | 4.99 | 413,025 |
| Countries of the World Quiz | 0 | - | 5.00 | 46,866,318 |
| Sahara Desert Countries | 0 | - | 4.98 | 160,326 |
| Himalayan Countries | 0 | - | 4.95 | 135,121 |
| Andean Countries | 0 | - | 4.94 | 82,699 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 62,119 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 123,041 |
| Coffee Producing Countries | 0 | - | 4.81 | 65,797 |
| Countries with Shrinking Populations | 0 | - | 4.93 | 64,501 |
| Danube Countries | 0 | - | 4.97 | 71,015 |
| Countries With an "Ish" Demonym | 0 | - | 4.98 | 115,671 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 85,473 |
| Countries with the Worst Passports | 0 | - | 4.93 | 82,329 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 147,243 |
| European Landlocked Countries | 0 | - | 4.99 | 145,685 |
| Partially Recognized Countries | 0 | - | 4.98 | 105,081 |
| Countries with the Most Species | 0 | - | 4.99 | 95,205 |
| Countries 197 to 205 | 0 | - | 4.89 | 69,237 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,181 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,340 |
| Countries that Use the Peso | 0 | - | 4.87 | 58,916 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.89 | 72,532 |
| Countries with a AAA Credit Rating | 0 | - | 4.85 | 56,890 |
| Countries in the Alps | 0 | - | 4.87 | 116,716 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 94,497 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 105,121 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 77,958 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 95,344 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 115,079 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.91 | 94,944 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 99,494 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 52,700 |
| Largest Country by Body of Water | 0 | - | 4.95 | 56,613 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 61,991 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,172 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,006 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,389 |
| Arctic Ocean Countries | 0 | - | 4.95 | 78,694 |
| Countries with the Most Grassland | 0 | - | 4.93 | 76,695 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 116,924 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 67,582 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,210 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 44,705 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 238,929 |
| World Countries - Blind Typing | 0 | - | 5.00 | 105,425 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 47,554 |
| Largest Countries By Category | 0 | - | 4.97 | 156,654 |
| Countries by Countries | 0 | - | 4.96 | 62,189 |
| Country Flags with the Most White | 0 | - | 4.87 | 137,261 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 61,939 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,309 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 87,681 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,711,123 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 323,217 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 371,888 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 401,089 |
| Island Countries | 0 | - | 4.99 | 707,324 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,038,589 |
| Northernmost Countries | 0 | - | 4.99 | 357,351 |
| Countries of South America | 0 | - | 5.00 | 913,663 |
| Countries of Oceania | 0 | - | 5.00 | 1,039,020 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,845,819 |
| "Land" Countries | 0 | - | 4.98 | 333,469 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 170,908 |
| Countries with Megacities | 0 | - | 4.99 | 246,304 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 196,831 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 111,755 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 135,290 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 79,696 |
| Countries by Official Language | 0 | - | 4.95 | 192,624 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 292,931 |
| Countries in their Native Language | 0 | - | 4.99 | 196,503 |
| Independence from Whom | 0 | - | 4.99 | 209,525 |
| Subdivisions by Country | 0 | - | 4.86 | 50,038 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 130,607 |
| Megadiverse Countries | 0 | - | 4.97 | 133,841 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 129,677 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 54,883 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,381 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 74,844 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 161,567 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 61,946 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 92,619 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,076 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,186 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 44,722 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 75,429 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,374 |
| Countries Furthest from the United States | 0 | - | 4.94 | 88,448 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,462 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 74,621 |
| Most Dispersed Island Nations | 0 | - | 4.96 | 70,987 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,360,550 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 108,394 |
| World Map Quiz | 0 | - | 4.81 | 63,396 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 152,321 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 106,240 |
| Countries by Founding Story | 0 | - | 4.95 | 76,463 |
| Southernmost Countries of the World | 0 | - | 4.99 | 226,198 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 103,902 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 121,872 |
| Countries With the Most Languages | 0 | - | 4.90 | 199,551 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 109,788 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.89 | 92,987 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,192 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 60,892 |
| Tallest Countries North to South | 0 | - | 4.83 | 119,279 |
| Widest Countries East to West | 0 | - | 4.92 | 128,543 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,196 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 185,109 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 97,531 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 93,636 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 147,535 |
| Countries with the Most Desert | 0 | - | 4.93 | 126,965 |
| Countries by Contribution to UN Budget | 0 | - | 4.86 | 69,036 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.84 | 34,554 |
| Countries with Double Letters | 0 | - | 4.97 | 93,251 |
| Countries that End in N | 0 | - | 4.94 | 156,321 |
| Countries with Five Letters Quiz | 0 | - | 4.96 | 258,530 |
| Countries with Six Letters | 0 | - | 4.93 | 210,230 |
| Countries with W | 0 | - | 4.97 | 158,131 |
| Countries with Z | 0 | - | 4.98 | 287,659 |
| Countries with Letters Missing | 0 | - | 4.97 | 184,450 |
| Countries That End in U | 0 | - | 4.95 | 119,460 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 132,392 |
| Countries that End in O | 0 | - | 4.92 | 158,493 |
| Countries that End in R | 0 | - | 4.86 | 118,215 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 154,819 |
| Countries Ending in "IA" | 0 | - | 4.99 | 206,896 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 169,199 |
| Countries by Last Two Letters | 0 | - | 4.85 | 134,405 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 140,589 |
| Countries That End in Y | 0 | - | 4.90 | 185,164 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 196,205 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 151,577 |
| Countries that End in I | 0 | - | 4.94 | 134,326 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 182,047 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,152 |
| Countries That End in NIA | 0 | - | 4.92 | 108,944 |
| Countries That End in BIA | 0 | - | 4.92 | 147,631 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 165,997 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 118,424 |
| Countries That End in RIA | 0 | - | 4.93 | 126,029 |
| Most Common Words in Official Country Names | 0 | - | 4.85 | 109,933 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 225,024 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 132,459 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 124,839 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 90,278 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 73,880 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,052 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 102,573 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 124,421 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 48,776 |
| Countries with the Word "And" | 0 | - | 4.99 | 116,036 |
| Countries Containing Two or More Words | 0 | - | 4.96 | 52,715 |
| Countries that End in L | 0 | - | 4.94 | 155,655 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 210,785 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 84,968 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,472 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,235 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,377 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 246,408 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 198,980 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 125,848 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 162,088 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.93 | 223,274 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 151,454 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 70,574 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.81 | 108,152 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,396 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,269 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,433,821 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 377,296 |
| One Border Countries | 0 | - | 4.98 | 463,705 |
| Top Producing Countries | 0 | - | 4.63 | 115,874 |
| ISO Country Codes | 0 | - | 4.45 | 82,093 |
| Countries on the Equator | 0 | - | 4.63 | 140,261 |
| Members of the Arab League | 0 | - | 4.77 | 75,451 |
| Countries with the Oldest Median Age | 0 | - | 4.80 | 69,538 |
| Separatist Movements | 0 | - | 4.44 | 45,610 |
| Countries with the Best Passports | 0 | - | 4.73 | 84,530 |
| Prime Meridian Countries | 0 | - | 4.69 | 59,621 |
| Next Country Alphabetically | 0 | - | 4.70 | 85,531 |
| Westernmost Countries | 0 | - | 4.50 | 49,411 |
| Easternmost Countries | 0 | - | 4.75 | 62,664 |
| Countries With the Most ISIS Fighters | 0 | - | 4.54 | 39,445 |
| Top 10 Most Famous Island Countries | 0 | - | 4.69 | 107,812 |
| Indochina Countries | 0 | - | 4.74 | 65,895 |
| Atlantic Ocean Island Countries | 0 | - | 4.56 | 64,511 |
| Countries With the Most Conflict Deaths | 0 | - | 4.61 | 95,737 |
| Highest Foreign Aid Recipients | 0 | - | 4.67 | 43,864 |
| Pacific Ocean Island Countries | 0 | - | 4.49 | 56,944 |
| Countries with the Most Traffic-Related Deaths | 0 | - | 4.74 | 48,166 |
| Countries with the Lowest Obesity Rate | 0 | - | 4.47 | 53,387 |
| Countries that are the Source of Refugees | 0 | - | 4.68 | 60,547 |
| Countries 206 to 242 | 0 | - | 4.74 | 33,708 |
| Most Populous Countries By Category | 0 | - | 4.55 | 84,945 |
| Countries with the Most Turkic People | 0 | - | 4.75 | 45,370 |
| Countries Most-Mentioned by the New York Times, 1900–2018 | 0 | - | 4.74 | 61,216 |
| Flyover Countries | 0 | - | 4.64 | 50,528 |
