| Landlocked Countries Quiz | 0 | - | 4.99 | 373,534 |
| Countries of the World Quiz | 0 | - | 5.00 | 43,627,524 |
| Sahara Desert Countries | 0 | - | 4.98 | 141,322 |
| Himalayan Countries | 0 | - | 4.95 | 118,469 |
| Andean Countries | 0 | - | 4.92 | 66,350 |
| Countries with the Oldest Median Age | 0 | - | 4.83 | 67,441 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 55,044 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 110,260 |
| Coffee Producing Countries | 0 | - | 4.81 | 58,115 |
| Countries with Shrinking Populations | 0 | - | 4.93 | 57,799 |
| Danube Countries | 0 | - | 4.97 | 59,825 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 95,504 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 80,878 |
| Countries with the Best Passports | 0 | - | 4.81 | 78,196 |
| Countries with the Worst Passports | 0 | - | 4.91 | 60,401 |
| Countries with the Most Immigrants | 0 | - | 4.89 | 134,275 |
| European Landlocked Countries | 0 | - | 4.99 | 139,772 |
| Partially Recognized Countries | 0 | - | 4.98 | 96,276 |
| Countries with the Most Species | 0 | - | 4.99 | 91,682 |
| Countries 197 to 205 | 0 | - | 4.87 | 61,760 |
| Tropic of Cancer Countries | 0 | - | 4.96 | 46,276 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 45,400 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 51,708 |
| Countries that Use the Peso | 0 | - | 4.83 | 48,867 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.87 | 69,305 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 52,735 |
| Countries in the Alps | 0 | - | 4.86 | 108,595 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 89,657 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 95,778 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 74,600 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 82,514 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 109,413 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.90 | 91,075 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 93,938 |
| Five Biggest Countries by Longitude | 0 | - | 4.90 | 49,027 |
| Biggest Country by Body of Water | 0 | - | 4.95 | 47,358 |
| Countries with the Most Container Port Traffic | 0 | - | 4.91 | 57,931 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.88 | 72,095 |
| Bridge and Tunnel Borders | 0 | - | 4.95 | 50,694 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.89 | 38,565 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 99,337 |
| Arctic Ocean Countries | 0 | - | 4.94 | 75,049 |
| Countries with the Most Grassland | 0 | - | 4.93 | 72,675 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 106,931 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 64,110 |
| Countries that Host the Most Refugees | 0 | - | 4.94 | 56,058 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 217,801 |
| World Countries - Blind Typing | 0 | - | 5.00 | 82,596 |
| Countries in Their Own Alphabet | 0 | - | 4.96 | 44,406 |
| Largest Countries By Category | 0 | - | 4.97 | 149,968 |
| Countries by Countries | 0 | - | 4.96 | 57,716 |
| Country Flags with the Most White | 0 | - | 4.87 | 130,158 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 60,315 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 82,818 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,333,807 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,406,675 |
| Spanish-Speaking Countries | 0 | - | 4.94 | 356,675 |
| Countries with the Most Tourists Quiz | 0 | - | 4.91 | 377,557 |
| Island Countries Quiz | 0 | - | 4.99 | 685,399 |
| Biggest Countries by Area | 0 | - | 5.00 | 979,256 |
| Northernmost Countries | 0 | - | 4.99 | 339,851 |
| Countries of South America | 0 | - | 5.00 | 848,306 |
| Countries of Oceania | 0 | - | 5.00 | 958,956 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,697,457 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 155,198 |
| Countries with Megacities | 0 | - | 4.99 | 213,875 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 184,106 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.97 | 104,823 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 105,316 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.97 | 71,530 |
| Top 50 Countries by Population - In Order | 0 | - | 4.97 | 266,000 |
| Countries by Official Language | 0 | - | 4.95 | 181,969 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.90 | 278,937 |
| Countries in their Native Language | 0 | - | 4.98 | 186,919 |
| Independence from Whom | 0 | - | 4.99 | 197,357 |
| Subdivisions by Country | 0 | - | 4.86 | 48,143 |
| Who Controlled These Colonies? | 0 | - | 4.89 | 121,825 |
| Megadiverse Countries | 0 | - | 4.96 | 129,795 |
| Countries With the Most English Speakers | 0 | - | 4.89 | 118,746 |
| Countries with Multiple Big Islands | 0 | - | 4.92 | 110,133 |
| Most Desired Destinations for Potential Migrants | 0 | - | 4.83 | 49,075 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 153,907 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 58,789 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 84,852 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.94 | 148,294 |
| Countries with Multiple Populous Islands | 0 | - | 4.91 | 79,552 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 43,089 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 64,594 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 104,119 |
| Countries Furthest from the United States | 0 | - | 4.95 | 85,282 |
| Countries with the Highest HDI | 0 | - | 4.95 | 133,638 |
| Straight Shot to the Arctic Circle | 0 | - | 4.90 | 71,528 |
| Most Dispersed Island Nations | 0 | - | 4.96 | 67,923 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,225,022 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 95,488 |
| World Map Quiz | 0 | - | 4.88 | 56,202 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 130,950 |
| Smallest Countries with at Least One Border | 0 | - | 4.90 | 85,726 |
| Southernmost Countries of the World | 0 | - | 4.99 | 216,507 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 97,289 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 114,885 |
| Countries With the Most Languages | 0 | - | 4.88 | 186,668 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.93 | 91,766 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.89 | 87,436 |
| Countries with the Most Prisoners | 0 | - | 4.93 | 92,152 |
| Countries with the Most Domestic Camels | 0 | - | 4.93 | 57,627 |
| Tallest Countries North to South | 0 | - | 4.85 | 114,754 |
| Widest Countries East to West | 0 | - | 4.92 | 123,668 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 69,927 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 164,241 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 95,019 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 89,507 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 123,974 |
| Countries with the Most Desert | 0 | - | 4.93 | 122,490 |
| Countries by Contribution to UN Budget | 0 | - | 4.85 | 67,749 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.84 | 33,291 |
| Countries with Double Letters | 0 | - | 4.96 | 79,827 |
| Countries that End in N | 0 | - | 4.93 | 144,083 |
| Countries with Five Letters Quiz | 0 | - | 4.96 | 242,889 |
| Countries with Six Letters Quiz | 0 | - | 4.94 | 198,284 |
| Countries with W | 0 | - | 4.97 | 131,773 |
| Countries with Z | 0 | - | 4.98 | 273,383 |
| Countries with Letters Missing | 0 | - | 4.97 | 175,087 |
| Countries That End in U | 0 | - | 4.95 | 113,182 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 98,566 |
| Countries that End in O | 0 | - | 4.92 | 152,884 |
| Countries that End in R | 0 | - | 4.84 | 99,368 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 151,008 |
| Countries Ending in "IA" | 0 | - | 4.99 | 196,126 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 162,182 |
| Countries by Last Two Letters | 0 | - | 4.89 | 120,959 |
| Countries by First and Last Letter #2 | 0 | - | 4.95 | 134,479 |
| Countries That End in Y | 0 | - | 4.91 | 181,131 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 187,598 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.91 | 126,432 |
| Countries that End in I | 0 | - | 4.92 | 116,951 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 157,055 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 91,443 |
| Countries That End in NIA | 0 | - | 4.92 | 104,455 |
| Countries That End in BIA | 0 | - | 4.92 | 141,484 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 159,989 |
| Countries Whose Names Start with Saint | 0 | - | 4.86 | 113,886 |
| Countries That End in RIA | 0 | - | 4.89 | 104,811 |
| Most Common Words in Official Country Names | 0 | - | 4.85 | 104,952 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 212,819 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 125,966 |
| Divided Country Name Puzzle #3 | 0 | - | 4.91 | 117,631 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 4.99 | 83,641 |
| Add A Letter - Make a Country | 0 | - | 4.81 | 70,644 |
| Countries With One Word and Three A's | 0 | - | 4.93 | 47,771 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 96,837 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.97 | 118,967 |
| Countries that are Free from U.S.A. | 0 | - | 4.87 | 45,669 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 46,561 |
| Countries that End in L | 0 | - | 4.94 | 150,916 |
| "Land" Countries | 0 | - | 4.98 | 298,297 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 195,674 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 83,710 |
| City to Country Quiz #1 | 0 | - | 4.95 | 138,114 |
| City to Country Quiz #3 | 0 | - | 4.87 | 103,016 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 74,763 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 217,595 |
| Five Poorest Countries by Continent | 0 | - | 4.95 | 191,158 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 121,387 |
| Five Smallest Countries by Continent | 0 | - | 4.97 | 139,368 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.92 | 214,183 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 146,087 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.88 | 68,386 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.83 | 105,362 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 84,538 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 59,243 |
| Biggest Countries by Population | 0 | - | 4.99 | 1,368,923 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 361,896 |
| One Border Countries | 0 | - | 4.97 | 427,077 |
| Top-Producing Countries | 0 | - | 4.69 | 102,256 |
| Country Codes Quiz | 0 | - | 4.45 | 80,223 |
| Countries on the Equator | 0 | - | 4.74 | 136,942 |
| Members of the Arab League | 0 | - | 4.78 | 74,436 |
| Separatist Movements | 0 | - | 4.46 | 44,147 |
| Prime Meridian Countries | 0 | - | 4.69 | 58,430 |
| Next Country Alphabetically | 0 | - | 4.73 | 83,084 |
| Westernmost Countries | 0 | - | 4.49 | 48,564 |
| Easternmost Countries | 0 | - | 4.71 | 61,556 |
| Countries With the Most ISIS Fighters | 0 | - | 4.53 | 38,373 |
| Top 10 Most Famous Island Countries | 0 | - | 4.68 | 103,148 |
| Indochina Countries | 0 | - | 4.70 | 64,379 |
| Atlantic Ocean Island Countries | 0 | - | 4.55 | 63,894 |
| Countries With the Most Conflict Deaths | 0 | - | 4.65 | 93,774 |
| Highest Foreign Aid Recipients | 0 | - | 4.64 | 43,242 |
| Pacific Ocean Island Countries | 0 | - | 4.49 | 56,121 |
| Countries with the Most Traffic-Related Deaths | 0 | - | 4.74 | 47,085 |
| Countries with the Lowest Obesity Rate | 0 | - | 4.45 | 44,295 |
| Countries that are the Source of Refugees | 0 | - | 4.65 | 58,619 |
| Countries 206 to 242 | 0 | - | 4.71 | 32,324 |
| Most Populous Countries By Category | 0 | - | 4.55 | 63,494 |
| Countries with the Most Turkic People | 0 | - | 4.78 | 43,776 |
| Countries Most-Mentioned by the New York Times, 1900–2018 | 0 | - | 4.78 | 59,293 |
| Flyover Countries | 0 | - | 4.64 | 49,015 |
| Top 50 Countries by Area - In Order | 0 | - | 4.75 | 70,082 |
| Countries with the Most Coral Reefs | 0 | - | 4.70 | 38,704 |
