| Landlocked Countries | 0 | - | 4.99 | 419,375 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,365,189 |
| Sahara Desert Countries | 0 | - | 4.98 | 163,169 |
| Himalayan Countries | 0 | - | 4.95 | 137,602 |
| Andean Countries | 0 | - | 4.95 | 84,035 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 63,291 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 124,774 |
| Coffee Producing Countries | 0 | - | 4.83 | 66,901 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,402 |
| Danube Countries | 0 | - | 4.97 | 71,708 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 116,617 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,107 |
| Countries with the Worst Passports | 0 | - | 4.94 | 83,727 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 148,804 |
| European Landlocked Countries | 0 | - | 4.99 | 146,816 |
| Partially Recognized Countries | 0 | - | 4.98 | 106,191 |
| Countries with the Most Species | 0 | - | 4.99 | 102,965 |
| Countries 197 to 205 | 0 | - | 4.89 | 70,337 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,441 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,603 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,337 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,016 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,403 |
| Countries in the Alps | 0 | - | 4.87 | 117,757 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 95,185 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 106,460 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,449 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,046 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,154 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 95,748 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,333 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,232 |
| Largest Country by Body of Water | 0 | - | 4.96 | 57,994 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,592 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,509 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,358 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,964 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,226 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,251 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 118,272 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,089 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,591 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 45,600 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 242,562 |
| World Countries - Blind Typing | 0 | - | 5.00 | 107,335 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,020 |
| Largest Countries By Category | 0 | - | 4.97 | 157,716 |
| Countries by Countries | 0 | - | 4.96 | 62,880 |
| Country Flags with the Most White | 0 | - | 4.85 | 138,273 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,173 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,479 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 88,372 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,759,475 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 329,378 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 374,712 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 405,348 |
| Island Countries | 0 | - | 4.99 | 709,944 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,046,521 |
| Northernmost Countries | 0 | - | 4.99 | 360,673 |
| Countries of South America | 0 | - | 5.00 | 923,519 |
| Countries of Oceania | 0 | - | 5.00 | 1,051,881 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,867,838 |
| "Land" Countries | 0 | - | 4.98 | 335,901 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 173,145 |
| Countries with Megacities | 0 | - | 4.99 | 261,591 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 199,011 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,063 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 137,293 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 81,094 |
| Countries by Official Language | 0 | - | 4.95 | 194,717 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 295,645 |
| Countries in their Native Language | 0 | - | 4.99 | 198,263 |
| Independence from Whom | 0 | - | 4.99 | 211,426 |
| Subdivisions by Country | 0 | - | 4.86 | 50,302 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,788 |
| Megadiverse Countries | 0 | - | 4.96 | 134,796 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 131,602 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,206 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,775 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,030 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 162,756 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,407 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,039 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,866 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,509 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,001 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 77,089 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,741 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,015 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,803 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,177 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,347 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,376,681 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 110,312 |
| World Map Quiz | 0 | - | 4.81 | 64,660 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 155,804 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,070 |
| Southernmost Countries of the World | 0 | - | 4.99 | 227,603 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 104,979 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,700 |
| Countries With the Most Languages | 0 | - | 4.90 | 201,454 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,573 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,721 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,866 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,297 |
| Tallest Countries North to South | 0 | - | 4.83 | 120,327 |
| Widest Countries East to West | 0 | - | 4.92 | 129,415 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,392 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 186,004 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,011 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,550 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,273 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,591 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,254 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,732 |
| Countries with Double Letters | 0 | - | 4.97 | 95,158 |
| Countries that End in N | 0 | - | 4.95 | 170,130 |
| Countries with Five Letters | 0 | - | 4.96 | 280,674 |
| Countries with Six Letters | 0 | - | 4.94 | 212,578 |
| Countries with W | 0 | - | 4.97 | 159,562 |
| Countries with Z | 0 | - | 4.98 | 289,908 |
| Countries with Letters Missing | 0 | - | 4.96 | 185,808 |
| Countries That End in U | 0 | - | 4.95 | 120,432 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 133,818 |
| Countries that End in O | 0 | - | 4.92 | 159,219 |
| Countries that End in R | 0 | - | 4.87 | 118,750 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,530 |
| Countries Ending in "IA" | 0 | - | 4.99 | 208,402 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 170,156 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,114 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,705 |
| Countries That End in Y | 0 | - | 4.91 | 185,659 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 197,302 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 152,473 |
| Countries that End in I | 0 | - | 4.94 | 134,895 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 183,153 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,597 |
| Countries That End in NIA | 0 | - | 4.92 | 109,540 |
| Countries That End in BIA | 0 | - | 4.93 | 148,878 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,769 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,096 |
| Countries That End in RIA | 0 | - | 4.93 | 126,563 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 110,671 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 226,816 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 133,281 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 125,658 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 91,195 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,355 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,712 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,279 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,172 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,216 |
| Countries with the Word "And" | 0 | - | 4.99 | 116,883 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 53,585 |
| Countries that End in L | 0 | - | 4.94 | 156,566 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 214,213 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,161 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,861 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,745 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,801 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 248,869 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 200,234 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 142,678 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 163,176 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 224,679 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 152,612 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 70,969 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,609 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,697 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,443,914 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 379,883 |
| One Border Countries | 0 | - | 4.98 | 467,917 |
| Top Producing Countries | 0 | - | 4.63 | 116,146 |
| ISO Country Codes | 0 | - | 4.45 | 82,369 |
| Countries on the Equator | 0 | - | 4.63 | 140,661 |
| Members of the Arab League | 0 | - | 4.77 | 75,585 |
| Countries with the Oldest Median Age | 0 | - | 4.80 | 69,802 |
| Separatist Movements | 0 | - | 4.44 | 45,829 |
| Countries with the Best Passports | 0 | - | 4.73 | 85,073 |
| Prime Meridian Countries | 0 | - | 4.69 | 59,763 |
| Next Country Alphabetically | 0 | - | 4.70 | 86,167 |
| Westernmost Countries | 0 | - | 4.42 | 61,335 |
| Easternmost Countries | 0 | - | 4.75 | 62,837 |
| Countries With the Most ISIS Fighters | 0 | - | 4.54 | 39,600 |
| Top 10 Most Famous Island Countries | 0 | - | 4.69 | 108,449 |
| Indochina Countries | 0 | - | 4.74 | 66,112 |
| Atlantic Ocean Island Countries | 0 | - | 4.56 | 64,591 |
| Countries With the Most Conflict Deaths | 0 | - | 4.61 | 96,267 |
| Highest Foreign Aid Recipients | 0 | - | 4.67 | 43,956 |
| Pacific Ocean Island Countries | 0 | - | 4.49 | 57,062 |
| Countries with the Most Traffic-Related Deaths | 0 | - | 4.74 | 48,338 |
| Countries with the Lowest Obesity Rate | 0 | - | 4.47 | 53,614 |
| Countries that are the Source of Refugees | 0 | - | 4.68 | 60,805 |
| Countries 206 to 242 | 0 | - | 4.74 | 33,869 |
| Most Populous Countries By Category | 0 | - | 4.55 | 85,306 |
| Countries with the Most Turkic People | 0 | - | 4.75 | 45,614 |
| Countries Most-Mentioned by the New York Times, 1900–2018 | 0 | - | 4.74 | 61,487 |
| Flyover Countries | 0 | - | 4.68 | 50,747 |
| Top 50 Countries by Area - In Order | 0 | - | 4.73 | 73,758 |
| Countries with the Most Coral Reefs | 0 | - | 4.77 | 48,467 |
