| Independence from Whom | 0 | - | 4.99 | 209,896 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 130,896 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,055 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,183 |
| Countries by Founding Story | 0 | - | 4.95 | 76,616 |
| Recently Independent Countries | 0 | - | 4.98 | 158,083 |
| Countries of the World in 1900 | 0 | - | 4.89 | 83,660 |
| Countries of the World in 1914 with a Map | 0 | - | 4.99 | 193,394 |
| Countries of the World in 1945 with a Map | 0 | - | 5.00 | 149,127 |
| Countries by Former Name | 0 | - | 4.99 | 124,402 |
| Countries of the World Quiz | 0 | - | 5.00 | 46,983,529 |
| Landlocked Countries | 0 | - | 4.99 | 414,387 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,723,141 |
| Most Populous Countries by Year | 0 | - | 4.83 | 109,404 |
| First Countries to Reach 5 Million People | 0 | - | 4.92 | 134,426 |
| Most Populous Modern-Day Countries in 1000 AD | 0 | - | 4.87 | 75,368 |
| Most Populous Modern-Day Countries in 1 AD | 0 | - | 4.97 | 83,711 |
| Most Populous Modern-Day Countries in 1800 AD | 0 | - | 4.93 | 66,645 |
| Most Populous Modern-Day Countries in 1500 AD | 0 | - | 4.93 | 72,902 |
| Most Populous Modern-Day Countries by Century | 0 | - | 4.98 | 96,325 |
| Sahara Desert Countries | 0 | - | 4.98 | 160,913 |
| Himalayan Countries | 0 | - | 4.95 | 135,631 |
| Andean Countries | 0 | - | 4.94 | 82,978 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 62,336 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 123,385 |
| Coffee Producing Countries | 0 | - | 4.81 | 66,038 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 64,715 |
| Danube Countries | 0 | - | 4.97 | 71,156 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 115,863 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 85,615 |
| Countries with the Worst Passports | 0 | - | 4.94 | 82,645 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 147,556 |
| European Landlocked Countries | 0 | - | 4.99 | 145,855 |
| Partially Recognized Countries | 0 | - | 4.98 | 105,319 |
| Countries with the Most Species | 0 | - | 4.99 | 95,288 |
| Countries 197 to 205 | 0 | - | 4.89 | 69,474 |
| Countries Settled by Vikings | 0 | - | 4.93 | 120,922 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,225 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,396 |
| Countries that Use the Peso | 0 | - | 4.88 | 59,005 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.89 | 72,642 |
| Countries with a AAA Credit Rating | 0 | - | 4.85 | 57,008 |
| Countries in the Alps | 0 | - | 4.86 | 116,951 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 94,656 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 105,412 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,078 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 95,487 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 115,266 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.91 | 95,070 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 99,669 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 52,823 |
| Largest Country by Body of Water | 0 | - | 4.96 | 57,558 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,129 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,223 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,088 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,515 |
| Arctic Ocean Countries | 0 | - | 4.95 | 78,808 |
| Countries with the Most Grassland | 0 | - | 4.93 | 76,809 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 117,233 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 67,721 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,300 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 44,875 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 239,711 |
| World Countries - Blind Typing | 0 | - | 5.00 | 105,925 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 47,667 |
| Largest Countries By Category | 0 | - | 4.97 | 156,886 |
| Countries by Countries | 0 | - | 4.96 | 62,339 |
| Country Flags with the Most White | 0 | - | 4.87 | 137,526 |
| Warsaw Pact Countries | 0 | - | 4.83 | 84,299 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 61,993 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 67,775 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,352 |
| Countries of Europe in 1444 | 0 | - | 4.92 | 98,827 |
| Modern-Day Countries of the Inca Empire on a Map | 0 | - | 4.83 | 56,942 |
| Six Degrees of Separation - Countries #1 | 0 | - | 4.96 | 98,192 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 87,843 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 324,913 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 372,406 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 402,220 |
| Island Countries | 0 | - | 4.99 | 707,915 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,040,515 |
| Northernmost Countries | 0 | - | 4.99 | 358,140 |
| Countries of South America | 0 | - | 5.00 | 916,105 |
| Countries of Oceania | 0 | - | 5.00 | 1,042,220 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,851,019 |
| "Land" Countries | 0 | - | 4.98 | 333,859 |
| Most Populous Countries in 1900 | 0 | - | 4.91 | 172,692 |
| Countries by Independence Day | 0 | - | 4.56 | 52,630 |
| Former Countries by Capital | 0 | - | 4.45 | 127,098 |
| Former Countries | 0 | - | 4.75 | 132,772 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,364,519 |
| Flags of Countries of the World in 1910 | 0 | - | 4.96 | 78,175 |
| Battle to Country | 0 | - | 4.91 | 52,601 |
| Modern-Day Countries of the Umayyad Caliphate on a Map | 0 | - | 4.98 | 68,276 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 171,632 |
| Countries with Megacities | 0 | - | 4.99 | 247,586 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 197,471 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 112,209 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 135,885 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 80,132 |
| Countries by Official Language | 0 | - | 4.95 | 192,941 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 293,360 |
| Countries in their Native Language | 0 | - | 4.99 | 196,789 |
| Subdivisions by Country | 0 | - | 4.86 | 50,103 |
| Megadiverse Countries | 0 | - | 4.97 | 133,965 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 129,953 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 54,955 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,468 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 74,877 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 161,760 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,220 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,251 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 44,761 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 75,739 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,455 |
| Countries Furthest from the United States | 0 | - | 4.94 | 88,551 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,537 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 74,729 |
| Most Dispersed Island Nations | 0 | - | 4.96 | 71,063 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 108,812 |
| World Map Quiz | 0 | - | 4.81 | 63,642 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 153,133 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 106,414 |
| Countries by Road Signs | 0 | - | 4.98 | 53,187 |
| Southernmost Countries of the World | 0 | - | 4.99 | 226,552 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 104,328 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,071 |
| Countries With the Most Languages | 0 | - | 4.90 | 200,006 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 109,985 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.89 | 93,170 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,375 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,003 |
| Tallest Countries North to South | 0 | - | 4.83 | 119,419 |
| Widest Countries East to West | 0 | - | 4.92 | 128,891 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,248 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 185,331 |
| 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 | 93,752 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 147,700 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,127 |
| Countries by Contribution to UN Budget | 0 | - | 4.86 | 72,651 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.84 | 34,612 |
| Countries with Double Letters | 0 | - | 4.96 | 93,540 |
| Countries that End in N | 0 | - | 4.94 | 157,025 |
| Countries with Five Letters Quiz | 0 | - | 4.96 | 258,848 |
| Countries with Six Letters | 0 | - | 4.93 | 210,524 |
| Countries with W | 0 | - | 4.97 | 158,327 |
| Countries with Z | 0 | - | 4.98 | 288,054 |
| Countries with Letters Missing | 0 | - | 4.97 | 184,647 |
| Countries That End in U | 0 | - | 4.95 | 119,576 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 132,727 |
| Countries that End in O | 0 | - | 4.92 | 158,608 |
| Countries that End in R | 0 | - | 4.87 | 118,324 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 154,891 |
| Countries Ending in "IA" | 0 | - | 4.99 | 207,252 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 169,441 |
| Countries by Last Two Letters | 0 | - | 4.85 | 134,569 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,111 |
| Countries That End in Y | 0 | - | 4.90 | 185,248 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 196,493 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 151,792 |
| Countries that End in I | 0 | - | 4.94 | 134,485 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 182,324 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,243 |
| Countries That End in NIA | 0 | - | 4.92 | 109,061 |
| Countries That End in BIA | 0 | - | 4.92 | 147,777 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,159 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 118,564 |
| Countries That End in RIA | 0 | - | 4.93 | 126,140 |
| Most Common Words in Official Country Names | 0 | - | 4.85 | 110,097 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 225,467 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 132,593 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 124,962 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 90,451 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 73,968 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,197 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 102,719 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 124,585 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 48,851 |
| Countries with the Word "And" | 0 | - | 4.99 | 116,230 |
| Countries Containing Two or More Words | 0 | - | 4.96 | 52,898 |
| Countries that End in L | 0 | - | 4.94 | 156,060 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 211,655 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,005 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,563 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,359 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,473 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 247,620 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 199,433 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 139,429 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 162,484 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 223,828 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 151,802 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 70,756 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.81 | 108,205 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,438 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,366 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,436,378 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 377,963 |
| One Border Countries | 0 | - | 4.98 | 464,938 |
