| Independence from Whom | 0 | - | 4.99 | 211,027 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,491 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,286 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,743 |
| Countries by Founding Story | 0 | - | 4.95 | 76,952 |
| Cities by Former Name | 0 | - | 4.84 | 91,327 |
| Recently Independent Countries | 0 | - | 4.98 | 158,491 |
| Countries of the World in 1900 | 0 | - | 4.89 | 84,311 |
| Countries of the World in 1914 with a Map | 0 | - | 4.99 | 194,379 |
| Countries of the World in 1945 with a Map | 0 | - | 5.00 | 150,062 |
| Historical City to Country | 0 | - | 4.84 | 78,369 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,229,919 |
| Landlocked Countries | 0 | - | 4.99 | 417,463 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,747,144 |
| Most Populous Countries by Year | 0 | - | 4.83 | 110,107 |
| First Countries to Reach 5 Million People | 0 | - | 4.92 | 134,949 |
| Most Populous Modern-Day Countries in 1000 AD | 0 | - | 4.88 | 75,953 |
| Most Populous Modern-Day Countries in 1 AD | 0 | - | 4.97 | 91,488 |
| Most Populous Modern-Day Countries in 1800 AD | 0 | - | 4.93 | 67,051 |
| Most Populous Modern-Day Countries in 1500 AD | 0 | - | 4.93 | 73,329 |
| Most Populous Modern-Day Countries by Century | 0 | - | 4.98 | 96,932 |
| Sahara Desert Countries | 0 | - | 4.98 | 162,305 |
| Himalayan Countries | 0 | - | 4.95 | 136,825 |
| Andean Countries | 0 | - | 4.95 | 83,640 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 62,893 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 124,216 |
| Coffee Producing Countries | 0 | - | 4.83 | 66,564 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,157 |
| Danube Countries | 0 | - | 4.97 | 71,509 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 116,341 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 85,924 |
| Countries with the Worst Passports | 0 | - | 4.94 | 83,346 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 148,387 |
| European Landlocked Countries | 0 | - | 4.99 | 146,221 |
| Partially Recognized Countries | 0 | - | 4.98 | 105,914 |
| Countries with the Most Species | 0 | - | 4.99 | 102,530 |
| Countries 197 to 205 | 0 | - | 4.89 | 70,039 |
| Countries Settled by Vikings | 0 | - | 4.93 | 121,168 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,364 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,541 |
| Countries that Use the Peso | 0 | - | 4.88 | 59,213 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 72,872 |
| Countries with a AAA Credit Rating | 0 | - | 4.85 | 57,254 |
| Countries in the Alps | 0 | - | 4.86 | 117,464 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 94,987 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 106,086 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,326 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 95,830 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 115,926 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.91 | 95,338 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,098 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,060 |
| Largest Country by Body of Water | 0 | - | 4.96 | 57,875 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,414 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,413 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,257 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,808 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,073 |
| Countries with the Most Grassland | 0 | - | 4.93 | 77,085 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 117,889 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 67,955 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,486 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 45,335 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 241,529 |
| World Countries - Blind Typing | 0 | - | 5.00 | 106,832 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 47,888 |
| Largest Countries By Category | 0 | - | 4.97 | 157,401 |
| Countries by Countries | 0 | - | 4.96 | 62,695 |
| Country Flags with the Most White | 0 | - | 4.87 | 137,991 |
| Warsaw Pact Countries | 0 | - | 4.83 | 84,416 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,114 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 68,528 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,433 |
| Countries of Europe in 1444 | 0 | - | 4.92 | 99,311 |
| Modern-Day Countries of the Inca Empire on a Map | 0 | - | 4.83 | 57,198 |
| All Countries by Population With a Map | 0 | - | 4.98 | 108,038 |
| Six Degrees of Separation - Countries #1 | 0 | - | 4.96 | 98,497 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 88,179 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 327,759 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 374,194 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 404,357 |
| Island Countries | 0 | - | 4.99 | 709,183 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,044,442 |
| Northernmost Countries | 0 | - | 4.99 | 359,833 |
| Countries of South America | 0 | - | 5.00 | 920,896 |
| Countries of Oceania | 0 | - | 5.00 | 1,048,639 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,861,733 |
| "Land" Countries | 0 | - | 4.98 | 335,332 |
| Most Populous Countries in 1900 | 0 | - | 4.91 | 173,438 |
| Countries by Independence Day | 0 | - | 4.61 | 52,694 |
| Former Countries by Capital | 0 | - | 4.45 | 127,297 |
| Former Countries | 0 | - | 4.75 | 133,043 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,372,553 |
| Flags of Countries of the World in 1910 | 0 | - | 4.96 | 78,507 |
| Battle to Country | 0 | - | 4.91 | 53,016 |
| Modern-Day Countries of the Umayyad Caliphate on a Map | 0 | - | 4.98 | 68,529 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 172,557 |
| Countries with Megacities | 0 | - | 4.99 | 249,543 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 198,405 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 112,717 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 136,748 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 80,678 |
| Countries by Official Language | 0 | - | 4.95 | 194,343 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 295,155 |
| Countries in their Native Language | 0 | - | 4.99 | 197,921 |
| Subdivisions by Country | 0 | - | 4.86 | 50,235 |
| Megadiverse Countries | 0 | - | 4.96 | 134,651 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 131,066 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,123 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,680 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 74,971 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 162,540 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,665 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,419 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 44,824 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 76,545 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,633 |
| Countries Furthest from the United States | 0 | - | 4.94 | 88,733 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,694 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 74,912 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,255 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 109,810 |
| World Map Quiz | 0 | - | 4.81 | 64,259 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 154,843 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 106,832 |
| Countries within the Arctic Circle - Map Quiz | 0 | - | 4.85 | 63,616 |
| Countries by Road Signs | 0 | - | 4.98 | 53,511 |
| Southernmost Countries of the World | 0 | - | 4.99 | 227,231 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 104,768 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,497 |
| Countries With the Most Languages | 0 | - | 4.90 | 200,961 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,377 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,549 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,707 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,192 |
| Tallest Countries North to South | 0 | - | 4.83 | 120,179 |
| Widest Countries East to West | 0 | - | 4.92 | 129,245 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,346 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 185,771 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 97,955 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,282 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,067 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,437 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,168 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.84 | 34,697 |
| Countries with Double Letters | 0 | - | 4.97 | 94,718 |
| Countries that End in N | 0 | - | 4.95 | 169,033 |
| Countries with Five Letters | 0 | - | 4.96 | 275,590 |
| Countries with Six Letters | 0 | - | 4.94 | 212,010 |
| Countries with W | 0 | - | 4.97 | 159,241 |
| Countries with Z | 0 | - | 4.98 | 289,384 |
| Countries with Letters Missing | 0 | - | 4.96 | 185,447 |
| Countries That End in U | 0 | - | 4.95 | 120,253 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 133,467 |
| Countries that End in O | 0 | - | 4.92 | 159,072 |
| Countries that End in R | 0 | - | 4.87 | 118,637 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,406 |
| Countries Ending in "IA" | 0 | - | 4.99 | 208,031 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 169,923 |
| Countries by Last Two Letters | 0 | - | 4.85 | 134,945 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,530 |
| Countries That End in Y | 0 | - | 4.90 | 185,548 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 197,020 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 152,241 |
| Countries that End in I | 0 | - | 4.94 | 134,756 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 182,844 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,481 |
| Countries That End in NIA | 0 | - | 4.92 | 109,396 |
| Countries That End in BIA | 0 | - | 4.93 | 148,684 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,553 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 118,905 |
| Countries That End in RIA | 0 | - | 4.93 | 126,420 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 110,485 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 226,326 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 133,005 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 125,336 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 90,956 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,228 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,560 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,087 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 124,968 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,110 |
| Countries with the Word "And" | 0 | - | 4.99 | 116,662 |
| Countries Containing Two or More Words | 0 | - | 4.96 | 53,350 |
| Countries that End in L | 0 | - | 4.94 | 156,414 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 213,416 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,124 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,764 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,632 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,683 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 248,480 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 199,926 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 142,465 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 162,918 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 224,382 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 152,114 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 70,895 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.81 | 108,317 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,550 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,569 |
