| Independence from Whom | 0 | - | 4.99 | 189,246 |
| Who Controlled These Colonies? | 0 | - | 4.89 | 115,546 |
| Most Recently-Settled Countries | 0 | - | 4.92 | 49,867 |
| Countries of the World in 1938 Quiz | 0 | - | 4.96 | 79,572 |
| Recently Independent Countries Quiz | 0 | - | 4.98 | 146,418 |
| Countries of the World in 1900 | 0 | - | 4.88 | 68,413 |
| Countries of the World in 1914 with a Map | 0 | - | 4.99 | 173,499 |
| Countries of the World in 1945 with a Map | 0 | - | 5.00 | 130,657 |
| Countries by Former Name | 0 | - | 4.99 | 115,520 |
| Historical City to Country | 0 | - | 4.82 | 73,051 |
| Countries of the World Quiz | 0 | - | 5.00 | 41,729,621 |
| Most Populous Countries by Year | 0 | - | 4.81 | 95,709 |
| First Countries to Reach 5 Million People | 0 | - | 4.90 | 110,867 |
| Most Populous Modern-Day Countries in 1000 AD | 0 | - | 4.85 | 69,335 |
| Most Populous Modern-Day Countries in 1 AD | 0 | - | 4.97 | 76,962 |
| Most Populous Modern-Day Countries in 1800 AD | 0 | - | 4.92 | 54,224 |
| Most Populous Modern-Day Countries in 1500 AD | 0 | - | 4.93 | 67,611 |
| Most Populous Modern-Day Countries by Century | 0 | - | 4.98 | 88,143 |
| Countries Settled by Vikings | 0 | - | 4.93 | 112,971 |
| Warsaw Pact Countries | 0 | - | 4.83 | 80,895 |
| Countries of Europe in 1444 | 0 | - | 4.93 | 88,604 |
| Landlocked Countries Quiz | 0 | - | 4.99 | 333,988 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,167,269 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,225,920 |
| Most Populous Countries in 1900 | 0 | - | 4.92 | 163,469 |
| Flags of Countries of the World in 1910 | 0 | - | 4.95 | 70,129 |
| Battle to Country | 0 | - | 4.92 | 36,698 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 344,874 |
| Countries with the Most Tourists Quiz | 0 | - | 4.91 | 362,367 |
| Members of the Arab League | 0 | - | 4.86 | 66,173 |
| Island Countries Quiz | 0 | - | 4.99 | 668,349 |
| Sahara Desert Countries | 0 | - | 4.97 | 130,386 |
| Himalayan Countries | 0 | - | 4.94 | 108,324 |
| Andean Countries | 0 | - | 4.91 | 60,130 |
| Countries with the Oldest Median Age | 0 | - | 4.82 | 61,318 |
| Countries with the Youngest Median Age | 0 | - | 4.98 | 50,808 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 104,404 |
| Coffee Producing Countries | 0 | - | 4.82 | 54,826 |
| Countries with Shrinking Populations | 0 | - | 4.93 | 54,225 |
| Danube Countries | 0 | - | 4.96 | 57,208 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 92,220 |
| Countries With an "Ese" Demonym | 0 | - | 4.96 | 65,286 |
| Countries with the Best Passports | 0 | - | 4.86 | 72,671 |
| Countries with the Worst Passports | 0 | - | 4.89 | 50,369 |
| Countries with the Most Immigrants | 0 | - | 4.87 | 110,979 |
| European Landlocked Countries | 0 | - | 4.99 | 137,019 |
| Partially Recognized Countries | 0 | - | 4.98 | 90,783 |
| Countries with the Most Species | 0 | - | 4.99 | 89,851 |
| Countries 197 to 205 | 0 | - | 4.87 | 57,323 |
| Tropic of Cancer Countries | 0 | - | 4.96 | 45,008 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 44,311 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 49,039 |
| Countries that Use the Peso | 0 | - | 4.82 | 46,872 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.88 | 59,112 |
| Countries with a AAA Credit Rating | 0 | - | 4.87 | 49,896 |
| Countries in the Alps | 0 | - | 4.84 | 103,825 |
| Top Five Importing Partners by Country | 0 | - | 4.98 | 86,412 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 89,451 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 72,267 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 79,352 |
| Northernmost Countries by Continent | 0 | - | 4.97 | 94,880 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.91 | 88,330 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 90,521 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 46,762 |
| Biggest Country by Body of Water | 0 | - | 4.96 | 45,683 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 55,396 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.88 | 70,157 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 49,016 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 37,020 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 96,553 |
| Arctic Ocean Countries | 0 | - | 4.93 | 72,646 |
| Countries with the Most Grassland | 0 | - | 4.94 | 70,222 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 100,487 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 61,944 |
| Countries that Host the Most Refugees | 0 | - | 4.94 | 54,014 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 202,313 |
| World Countries - Blind Typing | 0 | - | 5.00 | 75,307 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 42,817 |
| Largest Countries By Category | 0 | - | 4.97 | 146,387 |
| Countries by Countries | 0 | - | 4.95 | 55,573 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 59,193 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 79,584 |
| Biggest Countries by Area | 0 | - | 5.00 | 946,894 |
| Northernmost Countries | 0 | - | 4.99 | 330,804 |
| Countries of South America | 0 | - | 5.00 | 809,359 |
| Countries of Oceania | 0 | - | 5.00 | 912,822 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,609,730 |
| Countries by Independence Day | 0 | - | 4.66 | 44,731 |
| Former Countries by Capital | 0 | - | 4.43 | 104,870 |
| Former Countries | 0 | - | 4.72 | 125,957 |
| Guerrillas by Country | 0 | - | 4.45 | 38,900 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 95,334 |
| Biggest Countries by Population | 0 | - | 4.99 | 1,328,067 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 353,198 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 128,920 |
| Countries with Megacities | 0 | - | 4.99 | 201,683 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 175,207 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.97 | 99,877 |
| Countries With More than 200 Million People | 0 | - | 4.93 | 98,130 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.97 | 65,791 |
| Top 50 Countries by Population - In Order | 0 | - | 4.97 | 252,788 |
| Countries by Official Language | 0 | - | 4.96 | 175,138 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.92 | 253,062 |
| Countries in their Native Language | 0 | - | 4.98 | 180,466 |
| Subdivisions by Country | 0 | - | 4.84 | 46,876 |
| Megadiverse Countries | 0 | - | 4.96 | 126,767 |
| Countries With the Most English Speakers | 0 | - | 4.87 | 93,809 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 107,549 |
| Most Desired Destinations for Potential Migrants | 0 | - | 4.82 | 47,791 |
| 15 Biggest Island Countries | 0 | - | 4.99 | 133,267 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.95 | 146,007 |
| Countries with Multiple Populous Islands | 0 | - | 4.91 | 77,688 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 41,839 |
| Countries by Sports League Revenue | 0 | - | 4.89 | 45,014 |
| Landmarks of Countries #1 | 0 | - | 4.89 | 102,232 |
| Countries Furthest from the United States | 0 | - | 4.94 | 72,910 |
| Countries with the Highest HDI | 0 | - | 4.95 | 131,431 |
| Straight Shot to the Arctic Circle | 0 | - | 4.92 | 69,374 |
| Most Dispersed Island Nations | 0 | - | 4.96 | 65,994 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,114,755 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 86,256 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 67,726 |
| World Map Quiz | 0 | - | 4.90 | 51,309 |
| Smallest Countries with at Least One Border | 0 | - | 4.90 | 82,670 |
| Southernmost Countries of the World | 0 | - | 4.99 | 209,619 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 92,554 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 109,872 |
| Countries With the Most Languages | 0 | - | 4.90 | 177,580 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.93 | 88,649 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.86 | 73,008 |
| Countries with the Most Prisoners | 0 | - | 4.93 | 88,192 |
| Countries with the Most Domestic Camels | 0 | - | 4.93 | 55,038 |
| Tallest Countries North to South | 0 | - | 4.85 | 111,519 |
| Widest Countries East to West | 0 | - | 4.93 | 120,484 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 69,107 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 160,460 |
| Countries with the Longest Perimeter | 0 | - | 4.81 | 72,795 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 93,383 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 86,585 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 120,585 |
| Countries with the Most Desert | 0 | - | 4.92 | 106,428 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 66,788 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 32,398 |
| Countries with Double Letters | 0 | - | 4.96 | 71,710 |
| Countries that End in N | 0 | - | 4.94 | 135,879 |
| Countries with Five Letters Quiz | 0 | - | 4.96 | 233,718 |
| Countries with Six Letters Quiz | 0 | - | 4.95 | 190,433 |
| Countries with W | 0 | - | 4.96 | 125,574 |
| Countries with Z | 0 | - | 4.98 | 264,507 |
| Countries with Letters Missing | 0 | - | 4.97 | 169,619 |
| Countries That End in U | 0 | - | 4.95 | 109,293 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 92,280 |
| Countries that End in O | 0 | - | 4.92 | 148,597 |
| Countries that End in R | 0 | - | 4.85 | 97,285 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 148,053 |
| Countries Ending in "IA" | 0 | - | 4.99 | 174,036 |
| Countries by First and Last Letter #1 | 0 | - | 4.98 | 157,620 |
| Countries by Last Two Letters | 0 | - | 4.90 | 117,642 |
| Countries by First and Last Letter #2 | 0 | - | 4.95 | 130,580 |
| Countries That End in Y | 0 | - | 4.90 | 162,372 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 162,900 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.91 | 122,318 |
| Countries that End in I | 0 | - | 4.92 | 115,181 |
| Countries Based on First Two Letters #2 | 0 | - | 4.98 | 151,552 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 89,343 |
| Countries That End in NIA | 0 | - | 4.92 | 101,771 |
| Countries That End in BIA | 0 | - | 4.91 | 127,248 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 155,066 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 110,915 |
| Countries That End in RIA | 0 | - | 4.90 | 101,859 |
| Most Common Words in Official Country Names | 0 | - | 4.85 | 101,684 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 204,400 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 121,522 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 112,642 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 4.99 | 79,210 |
| Countries With One Word and Three A's | 0 | - | 4.87 | 31,856 |
| Countries with a Unique Last Letter | 0 | - | 4.91 | 93,784 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 98,093 |
| Countries that are Free from U.S.A. | 0 | - | 4.90 | 43,646 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 42,407 |
| Countries that End in L | 0 | - | 4.95 | 135,781 |
| "Land" Countries | 0 | - | 4.98 | 292,195 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 191,186 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 82,850 |
| City to Country Quiz #1 | 0 | - | 4.95 | 135,304 |
| City to Country Quiz #3 | 0 | - | 4.87 | 101,022 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 72,564 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 210,951 |
| Five Poorest Countries by Continent | 0 | - | 4.94 | 170,762 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 117,748 |
| Five Smallest Countries by Continent | 0 | - | 4.97 | 134,825 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.93 | 196,279 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 142,504 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 66,589 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.84 | 103,268 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 83,234 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.93 | 57,338 |
| Biggest Mongol Empire Countries | 0 | - | 4.91 | 68,137 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,466,111 |
| One Border Countries | 0 | - | 4.98 | 415,542 |
