| Countries of the World in 1900 | 0 | - | 4.89 | 84,608 |
| Countries of the World in 1945 with a Map | 0 | - | 5.00 | 150,427 |
| Countries of Europe in 1444 | 0 | - | 4.92 | 99,497 |
| Countries of the World in 1444 | 0 | - | 4.98 | 60,116 |
| Modern-Day Countries of the Inca Empire on a Map | 0 | - | 4.83 | 57,307 |
| Independence from Whom | 0 | - | 4.99 | 211,335 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,725 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,386 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,988 |
| Countries by Founding Story | 0 | - | 4.95 | 77,077 |
| Modern-Day Countries of the Umayyad Caliphate on a Map | 0 | - | 4.98 | 68,633 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,822,983 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,615,335 |
| Recently Independent Countries | 0 | - | 4.98 | 159,027 |
| Countries by Former Name | 0 | - | 4.99 | 124,933 |
| Historical City to Country | 0 | - | 4.84 | 78,443 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,340,086 |
| Landlocked Countries | 0 | - | 4.99 | 419,041 |
| Save Humanity by Guessing Countries | 0 | - | 4.98 | 568,244 |
| Countries of Europe in 1000 with a Map | 0 | - | 4.78 | 43,101 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,757,371 |
| Most Populous Countries by Year | 0 | - | 4.83 | 110,408 |
| First Countries to Reach 5 Million People | 0 | - | 4.92 | 135,119 |
| Most Populous Modern-Day Countries in 1000 AD | 0 | - | 4.88 | 76,096 |
| Most Populous Modern-Day Countries in 1 AD | 0 | - | 4.98 | 92,513 |
| Most Populous Modern-Day Countries in 1800 AD | 0 | - | 4.93 | 67,166 |
| Most Populous Modern-Day Countries in 1500 AD | 0 | - | 4.93 | 73,450 |
| Most Populous Modern-Day Countries by Century | 0 | - | 4.98 | 97,091 |
| Sahara Desert Countries | 0 | - | 4.98 | 163,030 |
| Himalayan Countries | 0 | - | 4.94 | 137,460 |
| Andean Countries | 0 | - | 4.95 | 83,958 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 63,239 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 124,689 |
| Coffee Producing Countries | 0 | - | 4.83 | 66,845 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,362 |
| Danube Countries | 0 | - | 4.97 | 71,673 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 116,563 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,066 |
| Countries with the Worst Passports | 0 | - | 4.94 | 83,668 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 148,744 |
| European Landlocked Countries | 0 | - | 4.99 | 146,786 |
| Partially Recognized Countries | 0 | - | 4.98 | 106,146 |
| Countries with the Most Species | 0 | - | 4.99 | 102,921 |
| Countries 197 to 205 | 0 | - | 4.89 | 70,281 |
| Countries Settled by Vikings | 0 | - | 4.93 | 121,291 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,434 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,592 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,310 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 72,996 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,370 |
| Countries in the Alps | 0 | - | 4.87 | 117,703 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 95,142 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 106,379 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,427 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,000 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,110 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 95,643 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,292 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,195 |
| Largest Country by Body of Water | 0 | - | 4.96 | 57,974 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,560 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,486 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,343 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,933 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,191 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,215 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 118,206 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,068 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,577 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 45,535 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 242,424 |
| World Countries - Blind Typing | 0 | - | 5.00 | 107,246 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,007 |
| Largest Countries By Category | 0 | - | 4.97 | 157,655 |
| Countries by Countries | 0 | - | 4.96 | 62,847 |
| Pixelated World Map | 0 | - | 5.00 | 143,173 |
| Country Flags with the Most White | 0 | - | 4.85 | 138,224 |
| Warsaw Pact Countries | 0 | - | 4.83 | 84,451 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,165 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 68,833 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,474 |
| All Countries by Population With a Map | 0 | - | 4.98 | 108,549 |
| Six Degrees of Separation - Countries #1 | 0 | - | 4.96 | 98,661 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 88,329 |
| Countries of the World with a Borderless Map | 0 | - | 4.99 | 81,961 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 329,073 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 374,628 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 405,147 |
| Island Countries | 0 | - | 4.99 | 709,800 |
| Modern-Day Countries of the Khmer Empire on a Map | 0 | - | 4.75 | 45,445 |
| Modern-Day Countries of the Mayan Civilization | 0 | - | 4.77 | 33,304 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,046,131 |
| Northernmost Countries | 0 | - | 4.99 | 360,513 |
| Countries of South America | 0 | - | 5.00 | 923,019 |
| Countries of Oceania | 0 | - | 5.00 | 1,051,161 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,866,613 |
| "Land" Countries | 0 | - | 4.98 | 335,809 |
| Most Populous Countries in 1900 | 0 | - | 4.91 | 173,602 |
| Countries by Independence Day | 0 | - | 4.61 | 52,714 |
| Former Countries by Capital | 0 | - | 4.45 | 127,371 |
| Former Countries | 0 | - | 4.75 | 133,524 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,375,863 |
| Mediterranean Countries with an Empty Map | 0 | - | 4.99 | 104,951 |
| Flags of Countries of the World in 1910 | 0 | - | 4.96 | 78,682 |
| Battle to Country | 0 | - | 4.91 | 53,167 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,923 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,730 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 173,048 |
| Countries with Megacities | 0 | - | 4.99 | 260,448 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 198,915 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,010 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 137,191 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 81,016 |
| Countries by Official Language | 0 | - | 4.95 | 194,651 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 295,554 |
| Countries in their Native Language | 0 | - | 4.99 | 198,204 |
| Subdivisions by Country | 0 | - | 4.86 | 50,289 |
| Megadiverse Countries | 0 | - | 4.96 | 134,773 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 131,555 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,187 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,760 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,018 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 162,717 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,847 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,490 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 44,992 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 77,004 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,724 |
| Countries Furthest from the United States | 0 | - | 4.94 | 88,998 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,784 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,157 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,328 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 110,215 |
| World Map Quiz | 0 | - | 4.81 | 64,538 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 155,645 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,040 |
| Countries within the Arctic Circle - Map Quiz | 0 | - | 4.85 | 63,764 |
| Countries by Road Signs | 0 | - | 4.98 | 53,657 |
| Southernmost Countries of the World | 0 | - | 4.99 | 227,518 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 104,934 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,649 |
| Countries With the Most Languages | 0 | - | 4.90 | 201,342 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,523 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,677 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,837 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,267 |
| Tallest Countries North to South | 0 | - | 4.83 | 120,290 |
| Widest Countries East to West | 0 | - | 4.92 | 129,381 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,386 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 185,968 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 97,995 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,515 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,227 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,559 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,236 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,728 |
| Countries With the Tallest People | 0 | - | 4.93 | 94,811 |
| Countries with Double Letters | 0 | - | 4.97 | 95,108 |
| Countries that End in N | 0 | - | 4.95 | 170,019 |
| Countries with Five Letters | 0 | - | 4.96 | 280,306 |
| Countries with Six Letters | 0 | - | 4.94 | 212,500 |
| Countries with W | 0 | - | 4.97 | 159,527 |
| Countries with Z | 0 | - | 4.98 | 289,827 |
| Countries with Letters Missing | 0 | - | 4.96 | 185,760 |
| Countries That End in U | 0 | - | 4.95 | 120,418 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 133,763 |
| Countries that End in O | 0 | - | 4.92 | 159,201 |
| Countries that End in R | 0 | - | 4.87 | 118,737 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,516 |
| Countries Ending in "IA" | 0 | - | 4.99 | 208,345 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 170,117 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,091 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,672 |
| Countries That End in Y | 0 | - | 4.90 | 185,651 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 197,234 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 152,436 |
| Countries that End in I | 0 | - | 4.94 | 134,874 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 183,093 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,583 |
| Countries That End in NIA | 0 | - | 4.92 | 109,520 |
| Countries That End in BIA | 0 | - | 4.93 | 148,851 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,735 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,067 |
| Countries That End in RIA | 0 | - | 4.93 | 126,545 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 110,642 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 226,728 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 133,238 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 125,601 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 91,125 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,336 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,690 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,247 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,134 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,200 |
| Countries with the Word "And" | 0 | - | 4.99 | 116,834 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 53,548 |
| Countries that End in L | 0 | - | 4.94 | 156,542 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 214,054 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,156 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,841 |
