| Countries of the World in 1900 | 0 | - | 4.89 | 84,762 |
| Countries of the World in 1914 with a Map | 0 | - | 4.99 | 195,012 |
| Countries of the World in 1945 with a Map | 0 | - | 5.00 | 150,637 |
| Countries of Europe in 1444 | 0 | - | 4.92 | 99,632 |
| Countries of the World in 1444 | 0 | - | 4.98 | 60,194 |
| Modern-Day Countries of the Inca Empire on a Map | 0 | - | 4.83 | 57,382 |
| Independence from Whom | 0 | - | 4.99 | 211,537 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,855 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,433 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,090 |
| Countries by Founding Story | 0 | - | 4.95 | 77,137 |
| Modern-Day Countries of the Umayyad Caliphate on a Map | 0 | - | 4.98 | 68,709 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,825,825 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,619,194 |
| Recently Independent Countries | 0 | - | 4.98 | 159,135 |
| Countries by Former Name | 0 | - | 4.99 | 125,022 |
| Historical City to Country | 0 | - | 4.84 | 78,485 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,396,918 |
| Landlocked Countries | 0 | - | 4.99 | 419,721 |
| Save Humanity by Guessing Countries | 0 | - | 4.98 | 570,210 |
| Countries of Europe in 1000 with a Map | 0 | - | 4.78 | 43,174 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,762,120 |
| Most Populous Countries by Year | 0 | - | 4.83 | 110,507 |
| First Countries to Reach 5 Million People | 0 | - | 4.92 | 135,189 |
| Most Populous Modern-Day Countries in 1000 AD | 0 | - | 4.88 | 76,144 |
| Most Populous Modern-Day Countries in 1 AD | 0 | - | 4.98 | 92,648 |
| Most Populous Modern-Day Countries in 1800 AD | 0 | - | 4.93 | 67,218 |
| Most Populous Modern-Day Countries in 1500 AD | 0 | - | 4.93 | 73,498 |
| Most Populous Modern-Day Countries by Century | 0 | - | 4.98 | 97,172 |
| Sahara Desert Countries | 0 | - | 4.98 | 163,320 |
| Himalayan Countries | 0 | - | 4.95 | 137,760 |
| Andean Countries | 0 | - | 4.95 | 84,100 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 63,339 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 124,871 |
| Coffee Producing Countries | 0 | - | 4.83 | 66,968 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,446 |
| Danube Countries | 0 | - | 4.97 | 71,740 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 116,665 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,141 |
| Countries with the Worst Passports | 0 | - | 4.94 | 83,805 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 148,881 |
| European Landlocked Countries | 0 | - | 4.99 | 146,864 |
| Partially Recognized Countries | 0 | - | 4.98 | 106,242 |
| Countries with the Most Species | 0 | - | 4.99 | 103,007 |
| Countries 197 to 205 | 0 | - | 4.89 | 70,401 |
| Countries Settled by Vikings | 0 | - | 4.93 | 121,352 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,458 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,621 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,372 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,045 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,440 |
| Countries in the Alps | 0 | - | 4.87 | 117,823 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 95,217 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 106,547 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,472 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,318 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,211 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 95,781 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,375 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,262 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,024 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,627 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,524 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,373 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,994 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,262 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,283 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 118,357 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,118 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,624 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 45,661 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 242,752 |
| World Countries - Blind Typing | 0 | - | 5.00 | 107,447 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,043 |
| Largest Countries By Category | 0 | - | 4.97 | 157,789 |
| Countries by Countries | 0 | - | 4.96 | 62,925 |
| Pixelated World Map | 0 | - | 5.00 | 143,299 |
| Country Flags with the Most White | 0 | - | 4.85 | 138,328 |
| Warsaw Pact Countries | 0 | - | 4.83 | 84,485 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,182 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 69,008 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,487 |
| All Countries by Population With a Map | 0 | - | 4.98 | 108,813 |
| Six Degrees of Separation - Countries #1 | 0 | - | 4.96 | 98,722 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 88,415 |
| Countries of the World with a Borderless Map | 0 | - | 4.99 | 82,071 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 329,689 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 374,826 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 405,767 |
| Island Countries | 0 | - | 4.99 | 710,091 |
| Modern-Day Countries of the Khmer Empire on a Map | 0 | - | 4.75 | 45,502 |
| Modern-Day Countries of the Mayan Civilization | 0 | - | 4.77 | 33,353 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,046,963 |
| Northernmost Countries | 0 | - | 4.99 | 360,870 |
| Countries of South America | 0 | - | 5.00 | 924,051 |
| Countries of Oceania | 0 | - | 5.00 | 1,052,696 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,869,284 |
| "Land" Countries | 0 | - | 4.98 | 335,994 |
| Most Populous Countries in 1900 | 0 | - | 4.91 | 173,663 |
| Countries by Independence Day | 0 | - | 4.61 | 52,726 |
| Former Countries by Capital | 0 | - | 4.45 | 127,421 |
| Former Countries | 0 | - | 4.75 | 133,732 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,377,644 |
| Mediterranean Countries with an Empty Map | 0 | - | 4.99 | 105,024 |
| Flags of Countries of the World in 1910 | 0 | - | 4.96 | 78,777 |
| Battle to Country | 0 | - | 4.91 | 53,248 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,084 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 173,262 |
| Countries with Megacities | 0 | - | 4.99 | 262,442 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 199,093 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,117 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 137,396 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 81,168 |
| Countries by Official Language | 0 | - | 4.95 | 194,802 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 295,754 |
| Countries in their Native Language | 0 | - | 4.99 | 198,341 |
| Subdivisions by Country | 0 | - | 4.86 | 50,328 |
| Megadiverse Countries | 0 | - | 4.96 | 134,824 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 131,670 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,222 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,794 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,036 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 162,815 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,895 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,531 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,019 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 77,179 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,762 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,039 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,828 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,206 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,374 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 110,427 |
| World Map Quiz | 0 | - | 4.81 | 64,733 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 155,981 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,119 |
| Countries within the Arctic Circle - Map Quiz | 0 | - | 4.85 | 63,868 |
| Countries by Road Signs | 0 | - | 4.98 | 53,733 |
| Southernmost Countries of the World | 0 | - | 4.99 | 227,660 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 105,018 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,750 |
| Countries With the Most Languages | 0 | - | 4.90 | 201,585 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,620 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,768 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,905 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,317 |
| Tallest Countries North to South | 0 | - | 4.83 | 120,356 |
| Widest Countries East to West | 0 | - | 4.92 | 129,444 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,405 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 186,060 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,030 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,582 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,321 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,636 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,278 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,742 |
| Countries With the Tallest People | 0 | - | 4.93 | 94,863 |
| Countries with Double Letters | 0 | - | 4.97 | 95,249 |
| Countries that End in N | 0 | - | 4.95 | 170,253 |
| Countries with Five Letters | 0 | - | 4.96 | 280,987 |
| Countries with Six Letters | 0 | - | 4.94 | 212,687 |
| Countries with W | 0 | - | 4.97 | 159,634 |
| Countries with Z | 0 | - | 4.98 | 290,417 |
| Countries with Letters Missing | 0 | - | 4.96 | 185,877 |
| Countries That End in U | 0 | - | 4.95 | 120,471 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 133,891 |
| Countries that End in O | 0 | - | 4.92 | 159,250 |
| Countries that End in R | 0 | - | 4.87 | 118,770 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,546 |
| Countries Ending in "IA" | 0 | - | 4.99 | 208,487 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 170,239 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,159 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,764 |
| Countries That End in Y | 0 | - | 4.91 | 185,685 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 197,420 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 152,521 |
| Countries that End in I | 0 | - | 4.94 | 134,911 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 183,560 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,621 |
| Countries That End in NIA | 0 | - | 4.92 | 109,571 |
| Countries That End in BIA | 0 | - | 4.93 | 148,919 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,819 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,140 |
| Countries That End in RIA | 0 | - | 4.93 | 126,592 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 110,728 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 226,926 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 133,334 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 125,714 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 91,242 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,385 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,738 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,317 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,233 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,241 |
| Countries with the Word "And" | 0 | - | 4.99 | 116,918 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 53,647 |
| Countries that End in L | 0 | - | 4.94 | 156,603 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 214,430 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,169 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,881 |
