| Landlocked Countries | 0 | - | 4.99 | 426,050 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,892,072 |
| Sahara Desert Countries | 0 | - | 4.98 | 166,368 |
| Himalayan Countries | 0 | - | 4.93 | 140,327 |
| Andean Countries | 0 | - | 4.94 | 85,511 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 64,653 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 127,064 |
| Coffee Producing Countries | 0 | - | 4.83 | 68,231 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 66,462 |
| Danube Countries | 0 | - | 4.97 | 72,426 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 117,623 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,858 |
| Countries with the Worst Passports | 0 | - | 4.93 | 85,162 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 150,647 |
| European Landlocked Countries | 0 | - | 4.99 | 147,623 |
| Partially Recognized Countries | 0 | - | 4.98 | 107,333 |
| Countries with the Most Species | 0 | - | 4.99 | 103,578 |
| Countries 197 to 205 | 0 | - | 4.90 | 71,431 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,782 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,892 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,850 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,589 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 58,033 |
| Countries in the Alps | 0 | - | 4.87 | 118,806 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 102,681 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 107,905 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,975 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 97,038 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,980 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 96,276 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 101,430 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,882 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,437 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 63,196 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,891 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.91 | 41,754 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,573 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,815 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,906 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 119,891 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,631 |
| Countries that Host the Most Refugees | 0 | - | 4.96 | 73,996 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 46,703 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 245,792 |
| World Countries - Blind Typing | 0 | - | 5.00 | 109,204 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,526 |
| Largest Countries By Category | 0 | - | 4.97 | 158,890 |
| Countries by Countries | 0 | - | 4.96 | 63,663 |
| Country Flags with the Most White | 0 | - | 4.85 | 139,284 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,407 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,677 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 89,121 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,805,505 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 335,589 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 376,734 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 409,781 |
| Island Countries | 0 | - | 4.99 | 712,627 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,054,950 |
| Northernmost Countries | 0 | - | 4.99 | 364,096 |
| Countries of South America | 0 | - | 5.00 | 932,921 |
| Countries of Oceania | 0 | - | 5.00 | 1,063,642 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,889,870 |
| "Land" Countries | 0 | - | 4.98 | 338,431 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 175,215 |
| Countries with Megacities | 0 | - | 4.99 | 267,216 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 200,892 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 114,164 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 139,211 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 82,276 |
| Countries by Official Language | 0 | - | 4.95 | 196,032 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 297,675 |
| Countries in their Native Language | 0 | - | 4.99 | 199,766 |
| Independence from Whom | 0 | - | 4.99 | 213,113 |
| Subdivisions by Country | 0 | - | 4.87 | 50,623 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 133,474 |
| Megadiverse Countries | 0 | - | 4.96 | 135,290 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 132,971 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 55,546 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 126,702 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,232 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 164,289 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,862 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 95,134 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 154,573 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 96,078 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,262 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 78,570 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 108,386 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,449 |
| Countries with the Highest HDI | 0 | - | 4.95 | 137,157 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,592 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,881 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,394,172 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 112,405 |
| World Map Quiz | 0 | - | 4.81 | 65,761 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 159,359 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,726 |
| Countries by Founding Story | 0 | - | 4.95 | 77,817 |
| Countries by Road Signs | 0 | - | 4.98 | 54,362 |
| Southernmost Countries of the World | 0 | - | 4.99 | 229,295 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 106,107 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 123,578 |
| Countries With the Most Languages | 0 | - | 4.90 | 203,632 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.96 | 111,458 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 94,557 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,758 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,708 |
| Tallest Countries North to South | 0 | - | 4.85 | 130,754 |
| Widest Countries East to West | 0 | - | 4.92 | 130,552 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,603 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 187,275 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,524 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 95,071 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,996 |
| Countries with the Most Desert | 0 | - | 4.93 | 128,499 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,509 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,896 |
| Countries with Double Letters | 0 | - | 4.96 | 97,116 |
| Countries that End in N | 0 | - | 4.95 | 171,991 |
| Countries with Five Letters | 0 | - | 4.96 | 283,889 |
| Countries with Six Letters | 0 | - | 4.94 | 214,524 |
| Countries with W | 0 | - | 4.96 | 160,982 |
| Countries with Z | 0 | - | 4.98 | 292,502 |
| Countries with Letters Missing | 0 | - | 4.96 | 187,314 |
| Countries That End in U | 0 | - | 4.95 | 121,206 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 135,137 |
| Countries that End in O | 0 | - | 4.92 | 160,228 |
| Countries that End in R | 0 | - | 4.87 | 119,194 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,952 |
| Countries Ending in "IA" | 0 | - | 4.99 | 209,890 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 171,178 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,847 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 142,778 |
| Countries That End in Y | 0 | - | 4.91 | 186,097 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 198,488 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 153,296 |
| Countries that End in I | 0 | - | 4.94 | 135,329 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 184,651 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 96,066 |
| Countries That End in NIA | 0 | - | 4.92 | 110,075 |
| Countries That End in BIA | 0 | - | 4.93 | 149,593 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 167,563 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,789 |
| Countries That End in RIA | 0 | - | 4.93 | 127,070 |
| Most Common Words in Official Country Names | 0 | - | 4.85 | 111,407 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 228,626 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 134,207 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 126,645 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 92,203 |
| Add A Letter - Make a Country | 0 | - | 4.81 | 74,817 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 53,343 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,543 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,927 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,660 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,749 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 54,443 |
| Countries that End in L | 0 | - | 4.94 | 157,146 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 218,100 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,354 |
| City to Country Quiz #1 | 0 | - | 4.97 | 157,536 |
| City to Country Quiz #3 | 0 | - | 4.88 | 120,017 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 79,469 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 250,471 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 201,159 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 143,445 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 164,289 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 225,997 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 153,230 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 71,248 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,838 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 63,260 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,454,402 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 382,557 |
| One Border Countries | 0 | - | 4.98 | 472,028 |
| Top Producing Countries | 0 | - | 4.63 | 116,420 |
| ISO Country Codes | 0 | - | 4.49 | 91,686 |
| Countries on the Equator | 0 | - | 4.63 | 141,249 |
| Members of the Arab League | 0 | - | 4.77 | 75,724 |
| Countries with the Oldest Median Age | 0 | - | 4.80 | 70,073 |
| Separatist Movements | 0 | - | 4.45 | 46,047 |
| Countries with the Best Passports | 0 | - | 4.73 | 85,592 |
| Prime Meridian Countries | 0 | - | 4.69 | 59,929 |
| Next Country Alphabetically | 0 | - | 4.70 | 86,447 |
| Westernmost Countries | 0 | - | 4.43 | 62,549 |
| Easternmost Countries | 0 | - | 4.74 | 63,069 |
| Countries With the Most ISIS Fighters | 0 | - | 4.54 | 39,760 |
| Top 10 Most Famous Island Countries | 0 | - | 4.69 | 109,018 |
| Indochina Countries | 0 | - | 4.74 | 66,363 |
| Atlantic Ocean Island Countries | 0 | - | 4.56 | 64,683 |
| Countries With the Most Conflict Deaths | 0 | - | 4.62 | 96,818 |
| Highest Foreign Aid Recipients | 0 | - | 4.67 | 44,030 |
| Pacific Ocean Island Countries | 0 | - | 4.49 | 57,168 |
| Countries with the Most Traffic-Related Deaths | 0 | - | 4.74 | 48,502 |
| Countries with More Sheep than People | 0 | - | 4.48 | 32,063 |
| Countries with the Lowest Obesity Rate | 0 | - | 4.47 | 53,863 |
| Countries that are the Source of Refugees | 0 | - | 4.78 | 75,719 |
| Countries 206 to 242 | 0 | - | 4.74 | 34,078 |
| Most Populous Countries By Category | 0 | - | 4.55 | 85,697 |
| Countries with the Most Turkic People | 0 | - | 4.77 | 45,878 |
| Countries Most-Mentioned by the New York Times, 1900–2018 | 0 | - | 4.74 | 61,770 |
