| Landlocked Countries | 0 | - | 4.99 | 414,469 |
| Countries of the World Quiz | 0 | - | 5.00 | 46,990,867 |
| Sahara Desert Countries | 0 | - | 4.98 | 160,950 |
| Himalayan Countries | 0 | - | 4.95 | 135,653 |
| Andean Countries | 0 | - | 4.94 | 83,004 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 62,355 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 123,407 |
| Coffee Producing Countries | 0 | - | 4.81 | 66,051 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 64,722 |
| Danube Countries | 0 | - | 4.97 | 71,162 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 115,884 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 85,625 |
| Countries with the Worst Passports | 0 | - | 4.94 | 82,674 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 147,577 |
| European Landlocked Countries | 0 | - | 4.99 | 145,871 |
| Partially Recognized Countries | 0 | - | 4.98 | 105,345 |
| Countries with the Most Species | 0 | - | 4.99 | 95,296 |
| Countries 197 to 205 | 0 | - | 4.89 | 69,500 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,230 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,401 |
| Countries that Use the Peso | 0 | - | 4.88 | 59,009 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.89 | 72,649 |
| Countries with a AAA Credit Rating | 0 | - | 4.85 | 57,016 |
| Countries in the Alps | 0 | - | 4.86 | 116,959 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 94,667 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 105,431 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,088 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 95,501 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 115,278 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.91 | 95,078 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 99,680 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 52,830 |
| Largest Country by Body of Water | 0 | - | 4.96 | 57,569 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,136 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,228 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,094 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,521 |
| Arctic Ocean Countries | 0 | - | 4.95 | 78,819 |
| Countries with the Most Grassland | 0 | - | 4.93 | 76,819 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 117,260 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 67,726 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,304 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 44,887 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 239,776 |
| World Countries - Blind Typing | 0 | - | 5.00 | 105,953 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 47,677 |
| Largest Countries By Category | 0 | - | 4.97 | 156,894 |
| Countries by Countries | 0 | - | 4.96 | 62,348 |
| Country Flags with the Most White | 0 | - | 4.87 | 137,533 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 61,996 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,355 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 87,844 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,723,833 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 325,010 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 372,438 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 402,264 |
| Island Countries | 0 | - | 4.99 | 707,953 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,040,628 |
| Northernmost Countries | 0 | - | 4.99 | 358,188 |
| Countries of South America | 0 | - | 5.00 | 916,247 |
| Countries of Oceania | 0 | - | 5.00 | 1,042,373 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,851,371 |
| "Land" Countries | 0 | - | 4.98 | 333,891 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 171,662 |
| Countries with Megacities | 0 | - | 4.99 | 247,654 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 197,512 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 112,221 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 135,906 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 80,150 |
| Countries by Official Language | 0 | - | 4.95 | 192,956 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 293,387 |
| Countries in their Native Language | 0 | - | 4.99 | 196,812 |
| Independence from Whom | 0 | - | 4.99 | 209,921 |
| Subdivisions by Country | 0 | - | 4.86 | 50,107 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 130,910 |
| Megadiverse Countries | 0 | - | 4.97 | 133,967 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 129,974 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 54,961 |
| Countries with Multiple Big Islands | 0 | - | 4.92 | 125,472 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 74,881 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 161,774 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,063 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,197 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,223 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,255 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 44,761 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 75,751 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,458 |
| Countries Furthest from the United States | 0 | - | 4.94 | 88,560 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,543 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 74,734 |
| Most Dispersed Island Nations | 0 | - | 4.96 | 71,067 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,364,775 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 108,839 |
| World Map Quiz | 0 | - | 4.81 | 63,660 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 153,172 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 106,419 |
| Southernmost Countries of the World | 0 | - | 4.99 | 226,576 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 104,362 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,092 |
| Countries With the Most Languages | 0 | - | 4.90 | 200,042 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,003 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,189 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,393 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,012 |
| Tallest Countries North to South | 0 | - | 4.83 | 119,439 |
| Widest Countries East to West | 0 | - | 4.92 | 128,942 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,254 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 185,348 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 97,608 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 93,767 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 147,709 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,140 |
| Countries by Contribution to UN Budget | 0 | - | 4.89 | 73,442 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.84 | 34,621 |
| Countries with Double Letters | 0 | - | 4.96 | 93,558 |
| Countries that End in N | 0 | - | 4.94 | 157,039 |
| Countries with Five Letters Quiz | 0 | - | 4.96 | 258,870 |
| Countries with Six Letters | 0 | - | 4.93 | 210,542 |
| Countries with W | 0 | - | 4.97 | 158,343 |
| Countries with Z | 0 | - | 4.98 | 288,069 |
| Countries with Letters Missing | 0 | - | 4.97 | 184,659 |
| Countries That End in U | 0 | - | 4.95 | 119,581 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 132,746 |
| Countries that End in O | 0 | - | 4.92 | 158,613 |
| Countries that End in R | 0 | - | 4.87 | 118,329 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 154,897 |
| Countries Ending in "IA" | 0 | - | 4.99 | 207,271 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 169,457 |
| Countries by Last Two Letters | 0 | - | 4.85 | 134,578 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,124 |
| Countries That End in Y | 0 | - | 4.90 | 185,251 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 196,505 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 151,801 |
| Countries that End in I | 0 | - | 4.94 | 134,491 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 182,339 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,252 |
| Countries That End in NIA | 0 | - | 4.92 | 109,070 |
| Countries That End in BIA | 0 | - | 4.92 | 147,786 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,164 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 118,578 |
| Countries That End in RIA | 0 | - | 4.93 | 126,144 |
| Most Common Words in Official Country Names | 0 | - | 4.85 | 110,102 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 225,517 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 132,606 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 124,970 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 90,462 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 73,974 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,204 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 102,727 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 124,599 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 48,854 |
| Countries with the Word "And" | 0 | - | 4.99 | 116,243 |
| Countries Containing Two or More Words | 0 | - | 4.96 | 52,912 |
| Countries that End in L | 0 | - | 4.94 | 156,098 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 211,710 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,007 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,568 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,367 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,478 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 247,667 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 199,463 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 139,923 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 162,509 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 223,863 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 151,819 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 70,764 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.81 | 108,212 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,444 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,376 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,436,524 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 378,010 |
| One Border Countries | 0 | - | 4.98 | 464,985 |
| Top Producing Countries | 0 | - | 4.63 | 115,952 |
| ISO Country Codes | 0 | - | 4.45 | 82,157 |
| Countries on the Equator | 0 | - | 4.63 | 140,357 |
| Members of the Arab League | 0 | - | 4.77 | 75,489 |
| Countries with the Oldest Median Age | 0 | - | 4.80 | 69,597 |
| Separatist Movements | 0 | - | 4.44 | 45,663 |
| Countries with the Best Passports | 0 | - | 4.73 | 84,660 |
| Prime Meridian Countries | 0 | - | 4.69 | 59,647 |
| Next Country Alphabetically | 0 | - | 4.70 | 85,592 |
| Westernmost Countries | 0 | - | 4.50 | 49,437 |
| Easternmost Countries | 0 | - | 4.75 | 62,695 |
| Countries With the Most ISIS Fighters | 0 | - | 4.54 | 39,487 |
| Top 10 Most Famous Island Countries | 0 | - | 4.69 | 107,947 |
| Indochina Countries | 0 | - | 4.74 | 65,961 |
| Atlantic Ocean Island Countries | 0 | - | 4.56 | 64,532 |
| Countries With the Most Conflict Deaths | 0 | - | 4.61 | 95,802 |
| Highest Foreign Aid Recipients | 0 | - | 4.67 | 43,888 |
| Pacific Ocean Island Countries | 0 | - | 4.49 | 56,967 |
| Countries with the Most Traffic-Related Deaths | 0 | - | 4.74 | 48,215 |
| Countries with the Lowest Obesity Rate | 0 | - | 4.47 | 53,444 |
| Countries that are the Source of Refugees | 0 | - | 4.68 | 60,623 |
| Countries 206 to 242 | 0 | - | 4.74 | 33,740 |
| Most Populous Countries By Category | 0 | - | 4.55 | 85,033 |
| Countries with the Most Turkic People | 0 | - | 4.75 | 45,434 |
| Countries Most-Mentioned by the New York Times, 1900–2018 | 0 | - | 4.74 | 61,291 |
| Flyover Countries | 0 | - | 4.67 | 50,583 |
| Top 50 Countries by Area - In Order | 0 | - | 4.70 | 73,455 |
