| Landlocked Countries Quiz | 0 | - | 4.99 | 330,036 |
| Countries of the World Quiz | 0 | - | 5.00 | 41,392,829 |
| Members of the Arab League | 0 | - | 4.85 | 64,652 |
| Sahara Desert Countries | 0 | - | 4.97 | 128,953 |
| Himalayan Countries | 0 | - | 4.95 | 106,895 |
| Andean Countries | 0 | - | 4.91 | 59,449 |
| Countries with the Oldest Median Age | 0 | - | 4.84 | 60,527 |
| Countries with the Youngest Median Age | 0 | - | 4.98 | 50,285 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 103,651 |
| Coffee Producing Countries | 0 | - | 4.82 | 54,550 |
| Countries with Shrinking Populations | 0 | - | 4.93 | 53,846 |
| Danube Countries | 0 | - | 4.96 | 56,998 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 92,013 |
| Countries With an "Ese" Demonym | 0 | - | 4.96 | 65,115 |
| Countries with the Best Passports | 0 | - | 4.87 | 72,065 |
| Countries with the Worst Passports | 0 | - | 4.88 | 49,955 |
| Countries with the Most Immigrants | 0 | - | 4.87 | 110,238 |
| European Landlocked Countries | 0 | - | 4.99 | 136,501 |
| Partially Recognized Countries | 0 | - | 4.98 | 90,370 |
| Countries with the Most Species | 0 | - | 4.99 | 89,707 |
| Countries 197 to 205 | 0 | - | 4.87 | 56,865 |
| Tropic of Cancer Countries | 0 | - | 4.96 | 44,885 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 44,180 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 48,711 |
| Countries that Use the Peso | 0 | - | 4.82 | 46,665 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.88 | 58,940 |
| Countries with a AAA Credit Rating | 0 | - | 4.87 | 49,556 |
| Countries in the Alps | 0 | - | 4.84 | 103,331 |
| Top Five Importing Partners by Country | 0 | - | 4.98 | 85,942 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 88,415 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 71,970 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 79,027 |
| Northernmost Countries by Continent | 0 | - | 4.97 | 94,495 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.91 | 87,996 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 90,156 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 46,500 |
| Biggest Country by Body of Water | 0 | - | 4.96 | 45,539 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 55,096 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.88 | 69,851 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 48,818 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 36,866 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 96,205 |
| Arctic Ocean Countries | 0 | - | 4.93 | 72,363 |
| Countries with the Most Grassland | 0 | - | 4.94 | 69,930 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 99,445 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 61,684 |
| Countries that Host the Most Refugees | 0 | - | 4.94 | 53,755 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 199,562 |
| World Countries - Blind Typing | 0 | - | 5.00 | 74,183 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 42,587 |
| Largest Countries By Category | 0 | - | 4.97 | 145,766 |
| Countries by Countries | 0 | - | 4.96 | 55,162 |
| Country Flags with the Most White | 0 | - | 4.90 | 125,431 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 58,984 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 78,984 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,126,669 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,195,266 |
| Spanish-Speaking Countries | 0 | - | 4.94 | 343,105 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 359,341 |
| Island Countries Quiz | 0 | - | 4.99 | 665,015 |
| Biggest Countries by Area | 0 | - | 5.00 | 940,692 |
| Northernmost Countries | 0 | - | 4.99 | 329,403 |
| Countries of South America | 0 | - | 5.00 | 802,701 |
| Countries of Oceania | 0 | - | 5.00 | 904,681 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,593,850 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 127,682 |
| Countries with Megacities | 0 | - | 4.99 | 199,918 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 173,483 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.97 | 99,031 |
| Countries With More than 200 Million People | 0 | - | 4.94 | 97,060 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 65,012 |
| Top 50 Countries by Population - In Order | 0 | - | 4.97 | 250,695 |
| Countries by Official Language | 0 | - | 4.96 | 174,222 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.92 | 251,346 |
| Countries in their Native Language | 0 | - | 4.98 | 179,439 |
| Independence from Whom | 0 | - | 4.99 | 187,621 |
| Subdivisions by Country | 0 | - | 4.82 | 46,703 |
| Who Controlled These Colonies? | 0 | - | 4.89 | 114,648 |
| Megadiverse Countries | 0 | - | 4.96 | 126,189 |
| Countries With the Most English Speakers | 0 | - | 4.87 | 92,546 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 107,155 |
| Most Desired Destinations for Potential Migrants | 0 | - | 4.82 | 47,642 |
| 15 Biggest Island Countries | 0 | - | 4.99 | 132,392 |
| Most Recently-Settled Countries | 0 | - | 4.92 | 49,526 |
| Countries of the World in 1938 Quiz | 0 | - | 4.96 | 78,849 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.95 | 145,698 |
| Countries with Multiple Populous Islands | 0 | - | 4.91 | 77,405 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 41,681 |
| Countries by Sports League Revenue | 0 | - | 4.88 | 44,494 |
| Landmarks of Countries #1 | 0 | - | 4.89 | 101,964 |
| Countries Furthest from the United States | 0 | - | 4.94 | 72,602 |
| Countries with the Highest HDI | 0 | - | 4.95 | 131,159 |
| Straight Shot to the Arctic Circle | 0 | - | 4.92 | 69,045 |
| Most Dispersed Island Nations | 0 | - | 4.96 | 65,668 |
| Countries of the World in Alphabetical Order | 0 | - | 4.99 | 84,493 |
| World Map Quiz | 0 | - | 4.91 | 50,493 |
| Smallest Countries with at Least One Border | 0 | - | 4.89 | 82,187 |
| Southernmost Countries of the World | 0 | - | 4.99 | 208,585 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 91,943 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.90 | 109,184 |
| Countries With the Most Languages | 0 | - | 4.91 | 175,841 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.93 | 88,083 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.86 | 72,466 |
| Countries with the Most Prisoners | 0 | - | 4.93 | 87,536 |
| Countries with the Most Domestic Camels | 0 | - | 4.93 | 54,597 |
| Tallest Countries North to South | 0 | - | 4.85 | 111,077 |
| Widest Countries East to West | 0 | - | 4.93 | 120,036 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 69,002 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 159,855 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 93,007 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 86,167 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 120,054 |
| Countries with the Most Desert | 0 | - | 4.92 | 105,773 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 66,640 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 32,257 |
| Countries with Double Letters | 0 | - | 4.96 | 70,052 |
| Countries that End in N | 0 | - | 4.94 | 134,258 |
| Countries with Five Letters Quiz | 0 | - | 4.96 | 231,625 |
| Countries with Six Letters Quiz | 0 | - | 4.94 | 188,992 |
| Countries with W | 0 | - | 4.96 | 124,208 |
| Countries with Z | 0 | - | 4.98 | 246,290 |
| Countries with Letters Missing | 0 | - | 4.97 | 168,451 |
| Countries That End in U | 0 | - | 4.95 | 108,348 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 90,860 |
| Countries that End in O | 0 | - | 4.92 | 147,623 |
| Countries that End in R | 0 | - | 4.84 | 96,863 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 147,674 |
| Countries Ending in "IA" | 0 | - | 4.99 | 172,768 |
| Countries by First and Last Letter #1 | 0 | - | 4.98 | 156,960 |
| Countries by Last Two Letters | 0 | - | 4.90 | 117,143 |
| Countries by First and Last Letter #2 | 0 | - | 4.94 | 130,084 |
| Countries That End in Y | 0 | - | 4.90 | 162,018 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 162,106 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.91 | 121,618 |
| Countries that End in I | 0 | - | 4.92 | 114,872 |
| Countries Based on First Two Letters #2 | 0 | - | 4.98 | 150,646 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 88,976 |
| Countries That End in NIA | 0 | - | 4.93 | 101,392 |
| Countries That End in BIA | 0 | - | 4.91 | 126,773 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 154,314 |
| Countries Whose Names Start with Saint | 0 | - | 4.88 | 110,418 |
| Countries That End in RIA | 0 | - | 4.90 | 101,500 |
| Most Common Words in Official Country Names | 0 | - | 4.85 | 101,142 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 203,026 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 120,774 |
| Divided Country Name Puzzle #3 | 0 | - | 4.93 | 111,823 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 4.99 | 78,437 |
| Countries with a Unique Last Letter | 0 | - | 4.91 | 93,245 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 97,484 |
| Countries that are Free from U.S.A. | 0 | - | 4.90 | 43,305 |
| Countries Containing Two or More Words | 0 | - | 4.96 | 41,673 |
| Countries that End in L | 0 | - | 4.95 | 135,275 |
| "Land" Countries | 0 | - | 4.98 | 291,305 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 190,466 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.96 | 65,307 |
| City to Country Quiz #1 | 0 | - | 4.94 | 134,868 |
| City to Country Quiz #3 | 0 | - | 4.86 | 100,685 |
| 45 European Countries, 45 Cities | 0 | - | 4.94 | 72,176 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 209,843 |
| Five Poorest Countries by Continent | 0 | - | 4.95 | 168,924 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 117,233 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 134,081 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.93 | 195,279 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 141,676 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 66,287 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.84 | 102,823 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 82,859 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.93 | 56,980 |
| Biggest Countries by Population | 0 | - | 4.99 | 1,320,765 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 351,522 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,093,723 |
| One Border Countries | 0 | - | 4.98 | 412,852 |
| Countries With One Word and Three A's | 0 | - | 4.87 | 31,408 |
| Top-Producing Countries | 0 | - | 4.71 | 100,529 |
| Country Codes Quiz | 0 | - | 4.46 | 77,810 |
| Countries on the Equator | 0 | - | 4.78 | 134,831 |
| Separatist Movements | 0 | - | 4.45 | 42,951 |
| Prime Meridian Countries | 0 | - | 4.63 | 52,038 |
| Next Country Alphabetically | 0 | - | 4.76 | 79,887 |
| Westernmost Countries | 0 | - | 4.50 | 47,741 |
| Easternmost Countries | 0 | - | 4.76 | 60,653 |
| Countries With the Most ISIS Fighters | 0 | - | 4.57 | 37,346 |
| Top 10 Most Famous Island Countries | 0 | - | 4.71 | 99,714 |
| Indochina Countries | 0 | - | 4.72 | 63,090 |
| Atlantic Ocean Island Countries | 0 | - | 4.54 | 63,249 |
| Countries With the Most Conflict Deaths | 0 | - | 4.63 | 91,570 |
| Highest Foreign Aid Recipients | 0 | - | 4.70 | 42,583 |
| Pacific Ocean Island Countries | 0 | - | 4.49 | 55,332 |
| Countries with the Most Traffic-Related Deaths | 0 | - | 4.76 | 46,168 |
| Countries with the Lowest Obesity Rate | 0 | - | 4.45 | 43,054 |
| Countries that are the Source of Refugees | 0 | - | 4.69 | 56,822 |
| Most Populous Countries By Category | 0 | - | 4.63 | 61,814 |
| Countries with the Most Turkic People | 0 | - | 4.80 | 42,375 |
| Countries Most-Mentioned by the New York Times | 0 | - | 4.66 | 45,392 |
| Flyover Countries | 0 | - | 4.65 | 47,656 |
| Top 50 Countries by Area - In Order | 0 | - | 4.76 | 67,258 |
| Countries with the Most Coral Reefs | 0 | - | 4.70 | 37,734 |
| Countries Without a U.S. Embassy | 0 | - | 4.58 | 42,752 |
| Most Recent Countries to Join the United Nations | 0 | - | 4.53 | 31,950 |
| Countries by Total Area of Bordering Countries | 0 | - | 4.79 | 49,864 |
