| Landlocked Countries | 0 | - | 4.99 | 426,297 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,907,383 |
| Sahara Desert Countries | 0 | - | 4.98 | 166,460 |
| Himalayan Countries | 0 | - | 4.93 | 140,412 |
| Andean Countries | 0 | - | 4.94 | 85,558 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 64,707 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 127,155 |
| Coffee Producing Countries | 0 | - | 4.83 | 68,275 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 66,511 |
| Danube Countries | 0 | - | 4.97 | 72,449 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 117,661 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,883 |
| Countries with the Worst Passports | 0 | - | 4.93 | 85,224 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 150,697 |
| European Landlocked Countries | 0 | - | 4.99 | 147,646 |
| Partially Recognized Countries | 0 | - | 4.98 | 107,362 |
| Countries with the Most Species | 0 | - | 4.99 | 103,592 |
| Countries 197 to 205 | 0 | - | 4.90 | 71,468 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,787 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,903 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,866 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,602 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 58,050 |
| Countries in the Alps | 0 | - | 4.87 | 118,831 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 102,735 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 107,950 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,992 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 97,067 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 117,004 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 96,295 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 101,453 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,899 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,451 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 63,215 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,904 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.91 | 41,766 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,587 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,831 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,923 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 119,935 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,643 |
| Countries that Host the Most Refugees | 0 | - | 4.96 | 74,915 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 46,721 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 245,873 |
| World Countries - Blind Typing | 0 | - | 5.00 | 109,245 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,541 |
| Largest Countries By Category | 0 | - | 4.97 | 158,920 |
| Countries by Countries | 0 | - | 4.96 | 63,684 |
| Country Flags with the Most White | 0 | - | 4.85 | 139,307 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,420 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,685 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 89,131 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,806,797 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 335,767 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 376,790 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 409,906 |
| Island Countries | 0 | - | 4.99 | 712,701 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,055,169 |
| Northernmost Countries | 0 | - | 4.99 | 364,199 |
| Countries of South America | 0 | - | 5.00 | 933,187 |
| Countries of Oceania | 0 | - | 5.00 | 1,064,122 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,890,466 |
| "Land" Countries | 0 | - | 4.98 | 338,492 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 175,272 |
| Countries with Megacities | 0 | - | 4.99 | 267,345 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 200,945 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 114,201 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 139,264 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 82,309 |
| Countries by Official Language | 0 | - | 4.95 | 196,074 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 297,729 |
| Countries in their Native Language | 0 | - | 4.99 | 199,802 |
| Independence from Whom | 0 | - | 4.99 | 213,172 |
| Subdivisions by Country | 0 | - | 4.87 | 50,635 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 133,526 |
| Megadiverse Countries | 0 | - | 4.96 | 137,994 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 133,000 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 55,552 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 126,733 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,234 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 164,324 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,875 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 95,159 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 154,583 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 96,100 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,267 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 78,611 |
| Landmarks of Countries #1 | 0 | - | 4.89 | 108,402 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,457 |
| Countries with the Highest HDI | 0 | - | 4.95 | 137,165 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,598 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,900 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,394,830 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 112,459 |
| World Map Quiz | 0 | - | 4.81 | 65,793 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 159,461 |
| Smallest Countries with at Least One Border | 0 | - | 4.88 | 107,741 |
| Countries by Founding Story | 0 | - | 4.95 | 77,840 |
| Countries by Road Signs | 0 | - | 4.98 | 54,380 |
| Southernmost Countries of the World | 0 | - | 4.99 | 229,342 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 106,143 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 123,604 |
| Countries With the Most Languages | 0 | - | 4.90 | 203,679 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.96 | 111,474 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 94,587 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,780 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,715 |
| Tallest Countries North to South | 0 | - | 4.85 | 130,810 |
| Widest Countries East to West | 0 | - | 4.92 | 130,759 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,610 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 187,289 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,527 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 95,086 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 149,020 |
| Countries with the Most Desert | 0 | - | 4.93 | 128,511 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,513 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,902 |
| Countries with Double Letters | 0 | - | 4.96 | 97,170 |
| Countries that End in N | 0 | - | 4.95 | 172,081 |
| Countries with Five Letters | 0 | - | 4.96 | 284,119 |
| Countries with Six Letters | 0 | - | 4.94 | 214,586 |
| Countries with W | 0 | - | 4.96 | 161,019 |
| Countries with Z | 0 | - | 4.98 | 292,558 |
| Countries with Letters Missing | 0 | - | 4.96 | 187,358 |
| Countries That End in U | 0 | - | 4.95 | 121,228 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 135,176 |
| Countries that End in O | 0 | - | 4.92 | 160,252 |
| Countries that End in R | 0 | - | 4.87 | 119,207 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,974 |
| Countries Ending in "IA" | 0 | - | 4.99 | 209,929 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 171,205 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,867 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 142,791 |
| Countries That End in Y | 0 | - | 4.91 | 186,105 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 198,512 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 153,312 |
| Countries that End in I | 0 | - | 4.94 | 135,344 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 184,677 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 96,084 |
| Countries That End in NIA | 0 | - | 4.92 | 110,089 |
| Countries That End in BIA | 0 | - | 4.93 | 149,614 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 167,632 |
| Countries Whose Names Start with Saint | 0 | - | 4.88 | 119,798 |
| Countries That End in RIA | 0 | - | 4.93 | 127,079 |
| Most Common Words in Official Country Names | 0 | - | 4.85 | 111,431 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 228,682 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 134,238 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 126,683 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 92,236 |
| Add A Letter - Make a Country | 0 | - | 4.81 | 74,830 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 53,356 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,548 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,946 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,666 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,774 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 54,474 |
| Countries that End in L | 0 | - | 4.94 | 157,167 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 218,166 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,357 |
| City to Country Quiz #1 | 0 | - | 4.97 | 157,561 |
| City to Country Quiz #3 | 0 | - | 4.88 | 120,036 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 79,479 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 250,499 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 201,191 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 143,460 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 164,319 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 226,027 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 153,249 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 71,256 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,845 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 63,278 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,454,709 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 382,641 |
| One Border Countries | 0 | - | 4.98 | 472,134 |
| Top Producing Countries | 0 | - | 4.63 | 116,429 |
| ISO Country Codes | 0 | - | 4.49 | 91,703 |
| Countries on the Equator | 0 | - | 4.63 | 141,259 |
| Members of the Arab League | 0 | - | 4.77 | 75,731 |
| Countries with the Oldest Median Age | 0 | - | 4.80 | 70,084 |
| Separatist Movements | 0 | - | 4.45 | 46,049 |
| Countries with the Best Passports | 0 | - | 4.73 | 85,610 |
| Prime Meridian Countries | 0 | - | 4.69 | 59,933 |
| Next Country Alphabetically | 0 | - | 4.70 | 86,453 |
| Westernmost Countries | 0 | - | 4.43 | 62,555 |
| Easternmost Countries | 0 | - | 4.74 | 63,075 |
| Countries With the Most ISIS Fighters | 0 | - | 4.54 | 39,763 |
| Top 10 Most Famous Island Countries | 0 | - | 4.69 | 109,034 |
| Indochina Countries | 0 | - | 4.74 | 66,369 |
| Atlantic Ocean Island Countries | 0 | - | 4.56 | 64,689 |
| Countries With the Most Conflict Deaths | 0 | - | 4.62 | 96,829 |
| Highest Foreign Aid Recipients | 0 | - | 4.67 | 44,033 |
| Pacific Ocean Island Countries | 0 | - | 4.49 | 57,170 |
| Countries with the Most Traffic-Related Deaths | 0 | - | 4.74 | 48,508 |
| Countries with More Sheep than People | 0 | - | 4.48 | 32,075 |
| Countries with the Lowest Obesity Rate | 0 | - | 4.47 | 53,874 |
| Countries that are the Source of Refugees | 0 | - | 4.78 | 75,799 |
| Countries 206 to 242 | 0 | - | 4.74 | 34,084 |
| Most Populous Countries By Category | 0 | - | 4.55 | 85,707 |
| Countries with the Most Turkic People | 0 | - | 4.77 | 45,883 |
| Countries Most-Mentioned by the New York Times, 1900–2018 | 0 | - | 4.74 | 61,775 |
