| Countries of the World in 1900 | 0 | - | 4.89 | 85,696 |
| Countries of the World in 1945 with a Map | 0 | - | 5.00 | 151,838 |
| Countries of Europe in 1444 | 0 | - | 4.92 | 100,387 |
| Countries of the World in 1444 | 0 | - | 4.98 | 60,642 |
| Modern-Day Countries of the Inca Empire on a Map | 0 | - | 4.83 | 57,775 |
| Independence from Whom | 0 | - | 4.99 | 212,703 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 133,179 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,738 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,860 |
| Countries by Founding Story | 0 | - | 4.95 | 77,646 |
| Modern-Day Countries of the Umayyad Caliphate on a Map | 0 | - | 4.98 | 69,093 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,843,606 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,645,832 |
| Recently Independent Countries | 0 | - | 4.98 | 159,768 |
| Countries by Former Name | 0 | - | 4.99 | 125,637 |
| Historical City to Country | 0 | - | 4.85 | 78,812 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,766,938 |
| Landlocked Countries | 0 | - | 4.99 | 424,279 |
| Save Humanity by Guessing Countries | 0 | - | 4.98 | 584,655 |
| Countries of Europe in 1000 with a Map | 0 | - | 4.78 | 43,534 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,794,991 |
| Most Populous Countries by Year | 0 | - | 4.83 | 111,199 |
| First Countries to Reach 5 Million People | 0 | - | 4.93 | 135,750 |
| Most Populous Modern-Day Countries in 1000 AD | 0 | - | 4.88 | 76,430 |
| Most Populous Modern-Day Countries in 1 AD | 0 | - | 4.98 | 93,106 |
| Most Populous Modern-Day Countries in 1800 AD | 0 | - | 4.93 | 67,443 |
| Most Populous Modern-Day Countries in 1500 AD | 0 | - | 4.93 | 73,777 |
| Most Populous Modern-Day Countries by Century | 0 | - | 4.98 | 97,635 |
| Sahara Desert Countries | 0 | - | 4.98 | 165,536 |
| Himalayan Countries | 0 | - | 4.94 | 139,694 |
| Andean Countries | 0 | - | 4.94 | 85,146 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 64,321 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 126,574 |
| Coffee Producing Countries | 0 | - | 4.83 | 67,897 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 66,179 |
| Danube Countries | 0 | - | 4.97 | 72,254 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 117,389 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,684 |
| Countries with the Worst Passports | 0 | - | 4.93 | 84,811 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 150,300 |
| European Landlocked Countries | 0 | - | 4.99 | 147,432 |
| Partially Recognized Countries | 0 | - | 4.98 | 107,048 |
| Countries with the Most Species | 0 | - | 4.99 | 103,458 |
| Countries 197 to 205 | 0 | - | 4.90 | 71,179 |
| Countries Settled by Vikings | 0 | - | 4.92 | 121,946 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,701 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,813 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,729 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,458 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,882 |
| Countries in the Alps | 0 | - | 4.87 | 118,550 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 102,229 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 107,559 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,844 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,855 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,777 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 96,117 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,998 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,714 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,330 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 63,048 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,782 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,650 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,429 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,666 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,757 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 119,455 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,505 |
| Countries that Host the Most Refugees | 0 | - | 4.96 | 65,467 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 46,460 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 245,115 |
| World Countries - Blind Typing | 0 | - | 5.00 | 108,782 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,412 |
| Largest Countries By Category | 0 | - | 4.97 | 158,605 |
| Countries by Countries | 0 | - | 4.96 | 63,485 |
| Pixelated World Map | 0 | - | 5.00 | 143,917 |
| Country Flags with the Most White | 0 | - | 4.85 | 139,059 |
| Warsaw Pact Countries | 0 | - | 4.83 | 84,636 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,359 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 70,114 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,638 |
| All Countries by Population With a Map | 0 | - | 4.98 | 110,466 |
| Six Degrees of Separation - Countries #1 | 0 | - | 4.96 | 99,249 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 88,958 |
| Countries of the World with a Borderless Map | 0 | - | 4.99 | 82,630 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 333,859 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 376,245 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 408,813 |
| Island Countries | 0 | - | 4.99 | 711,978 |
| Modern-Day Countries of the Khmer Empire on a Map | 0 | - | 4.77 | 45,753 |
| Modern-Day Countries of the Mayan Civilization | 0 | - | 4.78 | 33,611 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,053,019 |
| Northernmost Countries | 0 | - | 4.99 | 363,322 |
| Countries of South America | 0 | - | 5.00 | 930,589 |
| Countries of Oceania | 0 | - | 5.00 | 1,060,994 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,884,831 |
| "Land" Countries | 0 | - | 4.98 | 338,009 |
| Most Populous Countries in 1900 | 0 | - | 4.91 | 174,121 |
| Countries by Independence Day | 0 | - | 4.62 | 52,840 |
| Former Countries by Capital | 0 | - | 4.45 | 127,739 |
| Former Countries | 0 | - | 4.77 | 134,109 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,390,209 |
| Mediterranean Countries with an Empty Map | 0 | - | 4.99 | 105,396 |
| Flags of Countries of the World in 1910 | 0 | - | 4.96 | 79,346 |
| Battle to Country | 0 | - | 4.91 | 53,784 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,116 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,652 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 174,727 |
| Countries with Megacities | 0 | - | 4.99 | 266,250 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 200,452 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,867 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 138,744 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 81,979 |
| Countries by Official Language | 0 | - | 4.95 | 195,747 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 297,261 |
| Countries in their Native Language | 0 | - | 4.99 | 199,518 |
| Subdivisions by Country | 0 | - | 4.87 | 50,553 |
| Megadiverse Countries | 0 | - | 4.96 | 135,181 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 132,738 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 55,474 |
| Countries with Multiple Big Islands | 0 | - | 4.92 | 126,371 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,178 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 163,417 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 154,497 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,769 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,219 |
| Countries by Sports League Revenue | 0 | - | 4.95 | 78,153 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 108,296 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,361 |
| Countries with the Highest HDI | 0 | - | 4.95 | 137,084 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,506 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,618 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 111,962 |
| World Map Quiz | 0 | - | 4.81 | 65,417 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 158,512 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,561 |
| Countries within the Arctic Circle - Map Quiz | 0 | - | 4.84 | 64,424 |
| Countries by Road Signs | 0 | - | 4.98 | 54,237 |
| Southernmost Countries of the World | 0 | - | 4.99 | 228,945 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 105,926 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 123,414 |
| Countries With the Most Languages | 0 | - | 4.90 | 203,176 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.96 | 111,269 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 94,389 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,585 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,612 |
| Tallest Countries North to South | 0 | - | 4.86 | 129,935 |
| Widest Countries East to West | 0 | - | 4.92 | 130,291 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,555 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 187,083 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,455 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,967 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,845 |
| Countries with the Most Desert | 0 | - | 4.93 | 128,346 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,460 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,860 |
| Countries With the Tallest People | 0 | - | 4.93 | 95,126 |
| Countries with Double Letters | 0 | - | 4.96 | 96,771 |
| Countries that End in N | 0 | - | 4.95 | 171,657 |
| Countries with Five Letters | 0 | - | 4.96 | 283,351 |
| Countries with Six Letters | 0 | - | 4.94 | 214,115 |
| Countries with W | 0 | - | 4.96 | 160,724 |
| Countries with Z | 0 | - | 4.98 | 292,091 |
| Countries with Letters Missing | 0 | - | 4.96 | 187,070 |
| Countries That End in U | 0 | - | 4.95 | 121,065 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 134,870 |
| Countries that End in O | 0 | - | 4.92 | 159,715 |
| Countries that End in R | 0 | - | 4.87 | 119,101 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,849 |
| Countries Ending in "IA" | 0 | - | 4.99 | 209,554 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 170,984 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,697 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 142,628 |
| Countries That End in Y | 0 | - | 4.91 | 186,018 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 198,262 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 153,121 |
| Countries that End in I | 0 | - | 4.94 | 135,245 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 184,439 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,965 |
| Countries That End in NIA | 0 | - | 4.92 | 109,951 |
| Countries That End in BIA | 0 | - | 4.93 | 149,441 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 167,375 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,648 |
| Countries That End in RIA | 0 | - | 4.93 | 126,969 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 111,259 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 228,219 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 134,011 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 126,443 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 92,007 |
| Add A Letter - Make a Country | 0 | - | 4.81 | 74,724 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 53,223 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,505 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,763 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,571 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,563 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 54,257 |
| Countries that End in L | 0 | - | 4.94 | 157,021 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 216,920 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,314 |
| City to Country Quiz #1 | 0 | - | 4.97 | 156,302 |
