| Landlocked Countries | 0 | - | 4.99 | 424,206 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,761,631 |
| Sahara Desert Countries | 0 | - | 4.98 | 165,509 |
| Himalayan Countries | 0 | - | 4.94 | 139,663 |
| Andean Countries | 0 | - | 4.94 | 85,132 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 64,315 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 126,557 |
| Coffee Producing Countries | 0 | - | 4.83 | 67,887 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 66,170 |
| Danube Countries | 0 | - | 4.97 | 72,247 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 117,377 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,678 |
| Countries with the Worst Passports | 0 | - | 4.93 | 84,797 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 150,288 |
| European Landlocked Countries | 0 | - | 4.99 | 147,426 |
| Partially Recognized Countries | 0 | - | 4.98 | 107,038 |
| Countries with the Most Species | 0 | - | 4.99 | 103,454 |
| Countries 197 to 205 | 0 | - | 4.90 | 71,172 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,700 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,809 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,723 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,452 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,875 |
| Countries in the Alps | 0 | - | 4.87 | 118,536 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 102,210 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 107,545 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,840 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,849 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,774 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 96,115 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,962 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,705 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,326 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 63,041 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,780 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,644 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,421 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,663 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,749 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 119,445 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,496 |
| Countries that Host the Most Refugees | 0 | - | 4.96 | 65,437 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 46,445 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 245,090 |
| World Countries - Blind Typing | 0 | - | 5.00 | 108,767 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,408 |
| Largest Countries By Category | 0 | - | 4.97 | 158,597 |
| Countries by Countries | 0 | - | 4.96 | 63,479 |
| Country Flags with the Most White | 0 | - | 4.85 | 139,051 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,358 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,636 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 88,952 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,794,595 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 333,729 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 376,224 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 408,766 |
| Island Countries | 0 | - | 4.99 | 711,948 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,052,954 |
| Northernmost Countries | 0 | - | 4.99 | 363,288 |
| Countries of South America | 0 | - | 5.00 | 930,502 |
| Countries of Oceania | 0 | - | 5.00 | 1,060,900 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,884,607 |
| "Land" Countries | 0 | - | 4.98 | 337,992 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 174,682 |
| Countries with Megacities | 0 | - | 4.99 | 266,184 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 200,422 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,841 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 138,699 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 81,959 |
| Countries by Official Language | 0 | - | 4.95 | 195,736 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 297,236 |
| Countries in their Native Language | 0 | - | 4.99 | 199,499 |
| Independence from Whom | 0 | - | 4.99 | 212,685 |
| Subdivisions by Country | 0 | - | 4.87 | 50,550 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 133,168 |
| Megadiverse Countries | 0 | - | 4.96 | 135,175 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 132,696 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 55,469 |
| Countries with Multiple Big Islands | 0 | - | 4.92 | 126,368 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,175 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 163,412 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,731 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,849 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 154,489 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,766 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,218 |
| Countries by Sports League Revenue | 0 | - | 4.95 | 78,144 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 108,292 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,359 |
| Countries with the Highest HDI | 0 | - | 4.95 | 137,077 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,497 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,615 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,390,048 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 111,946 |
| World Map Quiz | 0 | - | 4.81 | 65,410 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 158,473 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,554 |
| Countries by Founding Story | 0 | - | 4.95 | 77,634 |
| Southernmost Countries of the World | 0 | - | 4.99 | 228,933 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 105,890 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 123,405 |
| Countries With the Most Languages | 0 | - | 4.90 | 203,146 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.96 | 111,260 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 94,382 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,579 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,610 |
| Tallest Countries North to South | 0 | - | 4.86 | 129,846 |
| Widest Countries East to West | 0 | - | 4.92 | 130,282 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,554 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 187,073 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,454 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,962 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,838 |
| Countries with the Most Desert | 0 | - | 4.93 | 128,335 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,459 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,860 |
| Countries with Double Letters | 0 | - | 4.96 | 96,757 |
| Countries that End in N | 0 | - | 4.95 | 171,648 |
| Countries with Five Letters | 0 | - | 4.96 | 283,340 |
| Countries with Six Letters | 0 | - | 4.94 | 214,105 |
| Countries with W | 0 | - | 4.96 | 160,712 |
| Countries with Z | 0 | - | 4.98 | 292,072 |
| Countries with Letters Missing | 0 | - | 4.96 | 187,067 |
| Countries That End in U | 0 | - | 4.95 | 121,059 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 134,866 |
| Countries that End in O | 0 | - | 4.92 | 159,706 |
| Countries that End in R | 0 | - | 4.87 | 119,101 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,847 |
| Countries Ending in "IA" | 0 | - | 4.99 | 209,541 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 170,978 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,694 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 142,615 |
| Countries That End in Y | 0 | - | 4.91 | 186,015 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 198,248 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 153,115 |
| Countries that End in I | 0 | - | 4.94 | 135,240 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 184,431 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,959 |
| Countries That End in NIA | 0 | - | 4.92 | 109,947 |
| Countries That End in BIA | 0 | - | 4.93 | 149,434 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 167,372 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,648 |
| Countries That End in RIA | 0 | - | 4.93 | 126,964 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 111,251 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 228,195 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 134,000 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 126,434 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 91,987 |
| Add A Letter - Make a Country | 0 | - | 4.81 | 74,721 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 53,221 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,503 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,753 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,569 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,553 |
| Countries Containing Two or More Words | 0 | - | 4.96 | 54,254 |
| Countries that End in L | 0 | - | 4.94 | 157,016 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 216,889 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,313 |
| City to Country Quiz #1 | 0 | - | 4.97 | 156,175 |
| City to Country Quiz #3 | 0 | - | 4.88 | 119,109 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 79,152 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 250,171 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 200,969 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 143,329 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 164,098 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 225,790 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 153,092 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 71,186 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,770 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 63,148 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,451,850 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 381,905 |
| One Border Countries | 0 | - | 4.98 | 471,185 |
| Top Producing Countries | 0 | - | 4.63 | 116,357 |
| ISO Country Codes | 0 | - | 4.49 | 91,550 |
| Countries on the Equator | 0 | - | 4.63 | 141,144 |
| Members of the Arab League | 0 | - | 4.77 | 75,692 |
| Countries with the Oldest Median Age | 0 | - | 4.80 | 70,002 |
| Separatist Movements | 0 | - | 4.45 | 45,976 |
| Countries with the Best Passports | 0 | - | 4.73 | 85,454 |
| Prime Meridian Countries | 0 | - | 4.69 | 59,890 |
| Next Country Alphabetically | 0 | - | 4.70 | 86,374 |
| Westernmost Countries | 0 | - | 4.43 | 62,519 |
| Easternmost Countries | 0 | - | 4.74 | 63,045 |
| Countries With the Most ISIS Fighters | 0 | - | 4.54 | 39,727 |
| Top 10 Most Famous Island Countries | 0 | - | 4.69 | 108,880 |
| Indochina Countries | 0 | - | 4.74 | 66,288 |
| Atlantic Ocean Island Countries | 0 | - | 4.56 | 64,667 |
| Countries With the Most Conflict Deaths | 0 | - | 4.62 | 96,446 |
| Highest Foreign Aid Recipients | 0 | - | 4.67 | 44,019 |
| Pacific Ocean Island Countries | 0 | - | 4.49 | 57,144 |
| Countries with the Most Traffic-Related Deaths | 0 | - | 4.74 | 48,465 |
| Countries with More Sheep than People | 0 | - | 4.48 | 31,926 |
| Countries with the Lowest Obesity Rate | 0 | - | 4.47 | 53,800 |
| Countries that are the Source of Refugees | 0 | - | 4.78 | 75,067 |
| Countries 206 to 242 | 0 | - | 4.74 | 34,029 |
| Most Populous Countries By Category | 0 | - | 4.55 | 85,613 |
| Countries with the Most Turkic People | 0 | - | 4.75 | 45,811 |
| Countries Most-Mentioned by the New York Times, 1900–2018 | 0 | - | 4.74 | 61,707 |
| Flyover Countries | 0 | - | 4.69 | 50,947 |
