| Independence from Whom | 0 | - | 4.99 | 209,882 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 130,892 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,053 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,181 |
| Countries by Founding Story | 0 | - | 4.95 | 76,613 |
| Recently Independent Countries | 0 | - | 4.98 | 158,080 |
| Countries of the World in 1900 | 0 | - | 4.89 | 83,654 |
| Countries of the World in 1914 with a Map | 0 | - | 4.99 | 193,374 |
| Countries of the World in 1945 with a Map | 0 | - | 5.00 | 149,115 |
| Countries by Former Name | 0 | - | 4.99 | 124,398 |
| Countries of the World Quiz | 0 | - | 5.00 | 46,980,134 |
| Landlocked Countries | 0 | - | 4.99 | 414,361 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,722,885 |
| Most Populous Countries by Year | 0 | - | 4.83 | 109,396 |
| First Countries to Reach 5 Million People | 0 | - | 4.92 | 134,418 |
| Most Populous Modern-Day Countries in 1000 AD | 0 | - | 4.87 | 75,362 |
| Most Populous Modern-Day Countries in 1 AD | 0 | - | 4.97 | 83,705 |
| Most Populous Modern-Day Countries in 1800 AD | 0 | - | 4.93 | 66,644 |
| Most Populous Modern-Day Countries in 1500 AD | 0 | - | 4.93 | 72,899 |
| Most Populous Modern-Day Countries by Century | 0 | - | 4.98 | 96,318 |
| Sahara Desert Countries | 0 | - | 4.98 | 160,891 |
| Himalayan Countries | 0 | - | 4.95 | 135,616 |
| Andean Countries | 0 | - | 4.94 | 82,968 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 62,330 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 123,377 |
| Coffee Producing Countries | 0 | - | 4.81 | 66,032 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 64,708 |
| Danube Countries | 0 | - | 4.97 | 71,152 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 115,856 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 85,610 |
| Countries with the Worst Passports | 0 | - | 4.94 | 82,638 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 147,552 |
| European Landlocked Countries | 0 | - | 4.99 | 145,853 |
| Partially Recognized Countries | 0 | - | 4.98 | 105,314 |
| Countries with the Most Species | 0 | - | 4.99 | 95,287 |
| Countries 197 to 205 | 0 | - | 4.89 | 69,468 |
| Countries Settled by Vikings | 0 | - | 4.93 | 120,919 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,225 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,395 |
| Countries that Use the Peso | 0 | - | 4.88 | 58,998 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.89 | 72,639 |
| Countries with a AAA Credit Rating | 0 | - | 4.85 | 57,007 |
| Countries in the Alps | 0 | - | 4.86 | 116,944 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 94,651 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 105,397 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,076 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 95,484 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 115,265 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.91 | 95,067 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 99,667 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 52,821 |
| Largest Country by Body of Water | 0 | - | 4.96 | 57,547 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,127 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,222 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,086 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,508 |
| Arctic Ocean Countries | 0 | - | 4.95 | 78,807 |
| Countries with the Most Grassland | 0 | - | 4.93 | 76,803 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 117,223 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 67,717 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,296 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 44,872 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 239,677 |
| World Countries - Blind Typing | 0 | - | 5.00 | 105,919 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 47,662 |
| Largest Countries By Category | 0 | - | 4.97 | 156,881 |
| Countries by Countries | 0 | - | 4.96 | 62,332 |
| Country Flags with the Most White | 0 | - | 4.87 | 137,521 |
| Warsaw Pact Countries | 0 | - | 4.83 | 84,298 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 61,991 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 67,764 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,351 |
| Countries of Europe in 1444 | 0 | - | 4.92 | 98,824 |
| Modern-Day Countries of the Inca Empire on a Map | 0 | - | 4.83 | 56,939 |
| Six Degrees of Separation - Countries #1 | 0 | - | 4.96 | 98,188 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 87,839 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 324,875 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 372,396 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 402,209 |
| Island Countries | 0 | - | 4.99 | 707,900 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,040,472 |
| Northernmost Countries | 0 | - | 4.99 | 358,122 |
| Countries of South America | 0 | - | 5.00 | 916,055 |
| Countries of Oceania | 0 | - | 5.00 | 1,042,158 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,850,902 |
| "Land" Countries | 0 | - | 4.98 | 333,846 |
| Most Populous Countries in 1900 | 0 | - | 4.91 | 172,688 |
| Countries by Independence Day | 0 | - | 4.56 | 52,629 |
| Former Countries by Capital | 0 | - | 4.45 | 127,096 |
| Former Countries | 0 | - | 4.75 | 132,771 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,364,411 |
| Flags of Countries of the World in 1910 | 0 | - | 4.96 | 78,172 |
| Battle to Country | 0 | - | 4.91 | 52,598 |
| Modern-Day Countries of the Umayyad Caliphate on a Map | 0 | - | 4.98 | 68,274 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 171,626 |
| Countries with Megacities | 0 | - | 4.99 | 247,565 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 197,462 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 112,203 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 135,878 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 80,129 |
| Countries by Official Language | 0 | - | 4.95 | 192,933 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 293,351 |
| Countries in their Native Language | 0 | - | 4.99 | 196,783 |
| Subdivisions by Country | 0 | - | 4.86 | 50,103 |
| Megadiverse Countries | 0 | - | 4.97 | 133,962 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 129,948 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 54,952 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,464 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 74,877 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 161,754 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,218 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,249 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 44,761 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 75,736 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,455 |
| Countries Furthest from the United States | 0 | - | 4.94 | 88,547 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,536 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 74,729 |
| Most Dispersed Island Nations | 0 | - | 4.96 | 71,059 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 108,800 |
| World Map Quiz | 0 | - | 4.81 | 63,641 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 153,108 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 106,409 |
| Countries by Road Signs | 0 | - | 4.98 | 53,185 |
| Southernmost Countries of the World | 0 | - | 4.99 | 226,534 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 104,318 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,056 |
| Countries With the Most Languages | 0 | - | 4.90 | 199,988 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 109,974 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.89 | 93,161 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,373 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 60,998 |
| Tallest Countries North to South | 0 | - | 4.83 | 119,409 |
| Widest Countries East to West | 0 | - | 4.92 | 128,848 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,243 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 185,323 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 97,603 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 93,749 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 147,700 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,123 |
| Countries by Contribution to UN Budget | 0 | - | 4.86 | 72,114 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.84 | 34,611 |
| Countries with Double Letters | 0 | - | 4.96 | 93,529 |
| Countries that End in N | 0 | - | 4.94 | 157,013 |
| Countries with Five Letters Quiz | 0 | - | 4.96 | 258,838 |
| Countries with Six Letters | 0 | - | 4.93 | 210,512 |
| Countries with W | 0 | - | 4.97 | 158,324 |
| Countries with Z | 0 | - | 4.98 | 288,050 |
| Countries with Letters Missing | 0 | - | 4.97 | 184,639 |
| Countries That End in U | 0 | - | 4.95 | 119,566 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 132,720 |
| Countries that End in O | 0 | - | 4.92 | 158,599 |
| Countries that End in R | 0 | - | 4.87 | 118,319 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 154,887 |
| Countries Ending in "IA" | 0 | - | 4.99 | 207,240 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 169,433 |
| Countries by Last Two Letters | 0 | - | 4.85 | 134,563 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,104 |
| Countries That End in Y | 0 | - | 4.90 | 185,242 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 196,487 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 151,788 |
| Countries that End in I | 0 | - | 4.94 | 134,482 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 182,317 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,242 |
| Countries That End in NIA | 0 | - | 4.92 | 109,058 |
| Countries That End in BIA | 0 | - | 4.92 | 147,774 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,153 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 118,563 |
| Countries That End in RIA | 0 | - | 4.93 | 126,131 |
| Most Common Words in Official Country Names | 0 | - | 4.85 | 110,092 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 225,434 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 132,585 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 124,958 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 90,448 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 73,966 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,192 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 102,718 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 124,582 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 48,849 |
| Countries with the Word "And" | 0 | - | 4.99 | 116,225 |
| Countries Containing Two or More Words | 0 | - | 4.96 | 52,891 |
| Countries that End in L | 0 | - | 4.94 | 156,006 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 211,635 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,004 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,561 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,356 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,472 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 247,603 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 199,419 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 139,203 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 162,480 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 223,815 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 151,796 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 70,755 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.81 | 108,198 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,438 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,364 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,436,306 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 377,955 |
| One Border Countries | 0 | - | 4.98 | 464,918 |
