| Landlocked Countries | 0 | - | 4.99 | 424,918 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,817,502 |
| Sahara Desert Countries | 0 | - | 4.98 | 165,831 |
| Himalayan Countries | 0 | - | 4.93 | 139,919 |
| Andean Countries | 0 | - | 4.94 | 85,260 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 64,427 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 126,766 |
| Coffee Producing Countries | 0 | - | 4.83 | 67,994 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 66,296 |
| Danube Countries | 0 | - | 4.97 | 72,302 |
| Countries With an "Ish" Demonym | 0 | - | 4.98 | 117,464 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,747 |
| Countries with the Worst Passports | 0 | - | 4.93 | 84,935 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 150,435 |
| European Landlocked Countries | 0 | - | 4.99 | 147,505 |
| Partially Recognized Countries | 0 | - | 4.98 | 107,159 |
| Countries with the Most Species | 0 | - | 4.99 | 103,510 |
| Countries 197 to 205 | 0 | - | 4.90 | 71,295 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,727 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,839 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,775 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,509 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,939 |
| Countries in the Alps | 0 | - | 4.87 | 118,657 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 102,434 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 107,691 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,907 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,937 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,861 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 96,175 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 101,298 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,798 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,363 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 63,100 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,810 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.91 | 41,686 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,481 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,716 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,813 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 119,620 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,548 |
| Countries that Host the Most Refugees | 0 | - | 4.96 | 65,647 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 46,542 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 245,372 |
| World Countries - Blind Typing | 0 | - | 5.00 | 108,941 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,460 |
| Largest Countries By Category | 0 | - | 4.97 | 158,734 |
| Countries by Countries | 0 | - | 4.96 | 63,553 |
| Country Flags with the Most White | 0 | - | 4.85 | 139,163 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,377 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,653 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 89,022 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,799,036 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 334,805 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 376,446 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 409,238 |
| Island Countries | 0 | - | 4.99 | 712,243 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,053,795 |
| Northernmost Countries | 0 | - | 4.99 | 363,622 |
| Countries of South America | 0 | - | 5.00 | 931,546 |
| Countries of Oceania | 0 | - | 5.00 | 1,061,909 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,886,647 |
| "Land" Countries | 0 | - | 4.98 | 338,202 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 174,940 |
| Countries with Megacities | 0 | - | 4.99 | 266,692 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 200,642 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,995 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 138,948 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 82,113 |
| Countries by Official Language | 0 | - | 4.95 | 195,855 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 297,447 |
| Countries in their Native Language | 0 | - | 4.99 | 199,625 |
| Independence from Whom | 0 | - | 4.99 | 212,886 |
| Subdivisions by Country | 0 | - | 4.87 | 50,583 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 133,307 |
| Megadiverse Countries | 0 | - | 4.96 | 135,221 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 132,836 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 55,500 |
| Countries with Multiple Big Islands | 0 | - | 4.92 | 126,407 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,202 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 163,503 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,796 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 95,007 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 154,527 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,789 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,236 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 78,342 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 108,334 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,402 |
| Countries with the Highest HDI | 0 | - | 4.95 | 137,116 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,546 |
| Most Dispersed Island Nations | 0 | - | 4.96 | 71,657 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,391,816 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 112,142 |
| World Map Quiz | 0 | - | 4.81 | 65,565 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 158,856 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,630 |
| Countries by Founding Story | 0 | - | 4.95 | 77,728 |
| Southernmost Countries of the World | 0 | - | 4.99 | 229,087 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 105,988 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 123,476 |
| Countries With the Most Languages | 0 | - | 4.90 | 203,364 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.96 | 111,332 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 94,456 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,657 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,644 |
| Tallest Countries North to South | 0 | - | 4.86 | 130,445 |
| Widest Countries East to West | 0 | - | 4.92 | 130,372 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,576 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 187,167 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,486 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 95,005 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,906 |
| Countries with the Most Desert | 0 | - | 4.93 | 128,401 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,475 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,876 |
| Countries with Double Letters | 0 | - | 4.96 | 96,912 |
| Countries that End in N | 0 | - | 4.94 | 171,788 |
| Countries with Five Letters | 0 | - | 4.96 | 283,547 |
| Countries with Six Letters | 0 | - | 4.94 | 214,273 |
| Countries with W | 0 | - | 4.96 | 160,829 |
| Countries with Z | 0 | - | 4.98 | 292,259 |
| Countries with Letters Missing | 0 | - | 4.96 | 187,177 |
| Countries That End in U | 0 | - | 4.95 | 121,115 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 134,984 |
| Countries that End in O | 0 | - | 4.92 | 159,814 |
| Countries that End in R | 0 | - | 4.87 | 119,134 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,893 |
| Countries Ending in "IA" | 0 | - | 4.99 | 209,703 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 171,062 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,761 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 142,691 |
| Countries That End in Y | 0 | - | 4.91 | 186,051 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 198,359 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 153,189 |
| Countries that End in I | 0 | - | 4.94 | 135,271 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 184,524 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 96,009 |
| Countries That End in NIA | 0 | - | 4.92 | 109,998 |
| Countries That End in BIA | 0 | - | 4.93 | 149,518 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 167,443 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,706 |
| Countries That End in RIA | 0 | - | 4.93 | 127,016 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 111,312 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 228,413 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 134,081 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 126,524 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 92,096 |
| Add A Letter - Make a Country | 0 | - | 4.81 | 74,765 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 53,269 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,520 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,829 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,609 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,638 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 54,327 |
| Countries that End in L | 0 | - | 4.94 | 157,070 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 217,699 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,330 |
| City to Country Quiz #1 | 0 | - | 4.97 | 157,283 |
| City to Country Quiz #3 | 0 | - | 4.88 | 119,836 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 79,383 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 250,309 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 201,065 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 143,386 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 164,184 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 225,884 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 153,150 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 71,211 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,804 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 63,191 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,452,934 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 382,182 |
| One Border Countries | 0 | - | 4.98 | 471,584 |
| Top Producing Countries | 0 | - | 4.63 | 116,391 |
| ISO Country Codes | 0 | - | 4.49 | 91,593 |
| Countries on the Equator | 0 | - | 4.63 | 141,190 |
| Members of the Arab League | 0 | - | 4.77 | 75,704 |
| Countries with the Oldest Median Age | 0 | - | 4.80 | 70,032 |
| Separatist Movements | 0 | - | 4.45 | 46,012 |
| Countries with the Best Passports | 0 | - | 4.73 | 85,518 |
| Prime Meridian Countries | 0 | - | 4.69 | 59,906 |
| Next Country Alphabetically | 0 | - | 4.70 | 86,405 |
| Westernmost Countries | 0 | - | 4.43 | 62,533 |
| Easternmost Countries | 0 | - | 4.74 | 63,057 |
| Countries With the Most ISIS Fighters | 0 | - | 4.54 | 39,747 |
| Top 10 Most Famous Island Countries | 0 | - | 4.69 | 108,942 |
| Indochina Countries | 0 | - | 4.74 | 66,319 |
| Atlantic Ocean Island Countries | 0 | - | 4.56 | 64,674 |
| Countries With the Most Conflict Deaths | 0 | - | 4.62 | 96,788 |
| Highest Foreign Aid Recipients | 0 | - | 4.67 | 44,023 |
| Pacific Ocean Island Countries | 0 | - | 4.49 | 57,156 |
| Countries with the Most Traffic-Related Deaths | 0 | - | 4.74 | 48,480 |
| Countries with More Sheep than People | 0 | - | 4.48 | 31,990 |
| Countries with the Lowest Obesity Rate | 0 | - | 4.47 | 53,829 |
| Countries that are the Source of Refugees | 0 | - | 4.78 | 75,381 |
| Countries 206 to 242 | 0 | - | 4.74 | 34,053 |
| Most Populous Countries By Category | 0 | - | 4.55 | 85,641 |
| Countries with the Most Turkic People | 0 | - | 4.77 | 45,846 |
| Countries Most-Mentioned by the New York Times, 1900–2018 | 0 | - | 4.74 | 61,731 |
| Flyover Countries | 0 | - | 4.69 | 50,976 |
