| Landlocked Countries | 0 | - | 4.99 | 420,422 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,451,868 |
| Sahara Desert Countries | 0 | - | 4.98 | 163,670 |
| Himalayan Countries | 0 | - | 4.95 | 138,060 |
| Andean Countries | 0 | - | 4.95 | 84,247 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 63,474 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 125,299 |
| Coffee Producing Countries | 0 | - | 4.83 | 67,108 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,550 |
| Danube Countries | 0 | - | 4.97 | 71,823 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 116,774 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,220 |
| Countries with the Worst Passports | 0 | - | 4.94 | 83,951 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 149,394 |
| European Landlocked Countries | 0 | - | 4.99 | 146,955 |
| Partially Recognized Countries | 0 | - | 4.98 | 106,363 |
| Countries with the Most Species | 0 | - | 4.99 | 103,080 |
| Countries 197 to 205 | 0 | - | 4.89 | 70,525 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,497 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,657 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,436 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,112 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,499 |
| Countries in the Alps | 0 | - | 4.87 | 117,949 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 99,228 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 106,681 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,545 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,441 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,295 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 95,828 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,460 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,331 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,069 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,698 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,561 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,417 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,063 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,342 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,359 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 118,508 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,174 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,684 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 45,800 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 243,126 |
| World Countries - Blind Typing | 0 | - | 5.00 | 107,643 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,102 |
| Largest Countries By Category | 0 | - | 4.97 | 157,911 |
| Countries by Countries | 0 | - | 4.97 | 63,004 |
| Country Flags with the Most White | 0 | - | 4.85 | 138,452 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,213 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,506 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 88,493 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,766,989 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 330,215 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 375,017 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 406,173 |
| Island Countries | 0 | - | 4.99 | 710,354 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,047,755 |
| Northernmost Countries | 0 | - | 4.99 | 361,186 |
| Countries of South America | 0 | - | 5.00 | 924,960 |
| Countries of Oceania | 0 | - | 5.00 | 1,053,866 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,871,641 |
| "Land" Countries | 0 | - | 4.98 | 336,237 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 173,441 |
| Countries with Megacities | 0 | - | 4.99 | 263,318 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 199,282 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,233 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 137,578 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 81,273 |
| Countries by Official Language | 0 | - | 4.95 | 194,920 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 295,932 |
| Countries in their Native Language | 0 | - | 4.99 | 198,444 |
| Independence from Whom | 0 | - | 4.99 | 211,691 |
| Subdivisions by Country | 0 | - | 4.86 | 50,358 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,970 |
| Megadiverse Countries | 0 | - | 4.96 | 134,873 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 131,779 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,252 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,843 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,058 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 162,901 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,473 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,206 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,933 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,560 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,039 |
| Countries by Sports League Revenue | 0 | - | 4.95 | 77,327 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,790 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,090 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,864 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,253 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,411 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,379,426 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 110,639 |
| World Map Quiz | 0 | - | 4.81 | 64,853 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 156,373 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,185 |
| Southernmost Countries of the World | 0 | - | 4.99 | 227,770 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 105,082 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,822 |
| Countries With the Most Languages | 0 | - | 4.90 | 201,755 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,708 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,842 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,011 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,349 |
| Tallest Countries North to South | 0 | - | 4.83 | 120,427 |
| Widest Countries East to West | 0 | - | 4.92 | 129,493 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,415 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 186,158 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,060 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,635 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,403 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,697 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,307 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,763 |
| Countries with Double Letters | 0 | - | 4.97 | 95,381 |
| Countries that End in N | 0 | - | 4.95 | 170,417 |
| Countries with Five Letters | 0 | - | 4.96 | 281,339 |
| Countries with Six Letters | 0 | - | 4.94 | 212,831 |
| Countries with W | 0 | - | 4.97 | 159,724 |
| Countries with Z | 0 | - | 4.98 | 290,637 |
| Countries with Letters Missing | 0 | - | 4.96 | 185,987 |
| Countries That End in U | 0 | - | 4.95 | 120,523 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 134,004 |
| Countries that End in O | 0 | - | 4.92 | 159,291 |
| Countries that End in R | 0 | - | 4.87 | 118,809 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,576 |
| Countries Ending in "IA" | 0 | - | 4.99 | 208,609 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 170,330 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,222 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,835 |
| Countries That End in Y | 0 | - | 4.91 | 185,728 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 197,537 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 152,617 |
| Countries that End in I | 0 | - | 4.94 | 134,958 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 183,732 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,671 |
| Countries That End in NIA | 0 | - | 4.92 | 109,631 |
| Countries That End in BIA | 0 | - | 4.93 | 148,983 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,882 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,208 |
| Countries That End in RIA | 0 | - | 4.93 | 126,651 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 110,778 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 227,099 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 133,416 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 125,808 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 91,342 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,415 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,801 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,359 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,300 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,288 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,005 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 53,718 |
| Countries that End in L | 0 | - | 4.94 | 156,660 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 214,785 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,191 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,910 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,824 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,876 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 249,419 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 200,399 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 142,808 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 163,332 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 224,838 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 152,712 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 71,017 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,642 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,760 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,445,560 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 380,309 |
| One Border Countries | 0 | - | 4.98 | 468,566 |
| Top Producing Countries | 0 | - | 4.63 | 116,193 |
| ISO Country Codes | 0 | - | 4.47 | 88,554 |
| Countries on the Equator | 0 | - | 4.63 | 140,729 |
| Members of the Arab League | 0 | - | 4.77 | 75,610 |
| Countries with the Oldest Median Age | 0 | - | 4.80 | 69,848 |
| Separatist Movements | 0 | - | 4.44 | 45,865 |
| Countries with the Best Passports | 0 | - | 4.73 | 85,149 |
| Prime Meridian Countries | 0 | - | 4.69 | 59,790 |
| Next Country Alphabetically | 0 | - | 4.70 | 86,221 |
| Westernmost Countries | 0 | - | 4.42 | 62,184 |
| Easternmost Countries | 0 | - | 4.75 | 62,869 |
| Countries With the Most ISIS Fighters | 0 | - | 4.54 | 39,625 |
| Top 10 Most Famous Island Countries | 0 | - | 4.69 | 108,522 |
| Indochina Countries | 0 | - | 4.74 | 66,134 |
| Atlantic Ocean Island Countries | 0 | - | 4.56 | 64,608 |
| Countries With the Most Conflict Deaths | 0 | - | 4.61 | 96,305 |
| Highest Foreign Aid Recipients | 0 | - | 4.67 | 43,970 |
| Pacific Ocean Island Countries | 0 | - | 4.49 | 57,077 |
| Countries with the Most Traffic-Related Deaths | 0 | - | 4.74 | 48,365 |
| Countries with the Lowest Obesity Rate | 0 | - | 4.47 | 53,648 |
| Countries that are the Source of Refugees | 0 | - | 4.68 | 60,859 |
| Countries 206 to 242 | 0 | - | 4.74 | 33,906 |
| Most Populous Countries By Category | 0 | - | 4.55 | 85,380 |
| Countries with the Most Turkic People | 0 | - | 4.75 | 45,652 |
| Countries Most-Mentioned by the New York Times, 1900–2018 | 0 | - | 4.74 | 61,537 |
| Flyover Countries | 0 | - | 4.69 | 50,777 |
| Top 50 Countries by Area - In Order | 0 | - | 4.73 | 73,843 |
| Countries with the Most Coral Reefs | 0 | - | 4.77 | 48,509 |
