| Countries of the World in 1900 | 0 | - | 4.89 | 85,821 |
| Countries of the World in 1914 with a Map | 0 | - | 4.99 | 196,546 |
| Countries of the World in 1945 with a Map | 0 | - | 5.00 | 151,979 |
| Countries of Europe in 1444 | 0 | - | 4.92 | 100,458 |
| Countries of the World in 1444 | 0 | - | 4.98 | 60,689 |
| Modern-Day Countries of the Inca Empire on a Map | 0 | - | 4.83 | 57,813 |
| Independence from Whom | 0 | - | 4.99 | 212,868 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 133,296 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,789 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,999 |
| Countries by Founding Story | 0 | - | 4.95 | 77,721 |
| Modern-Day Countries of the Umayyad Caliphate on a Map | 0 | - | 4.98 | 69,122 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,845,601 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,648,770 |
| Recently Independent Countries | 0 | - | 4.98 | 159,877 |
| Countries by Former Name | 0 | - | 4.99 | 125,718 |
| Historical City to Country | 0 | - | 4.85 | 78,954 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,811,288 |
| Landlocked Countries | 0 | - | 4.99 | 424,855 |
| Save Humanity by Guessing Countries | 0 | - | 4.98 | 585,961 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,798,585 |
| Most Populous Countries by Year | 0 | - | 4.83 | 111,297 |
| First Countries to Reach 5 Million People | 0 | - | 4.93 | 135,820 |
| Most Populous Modern-Day Countries in 1000 AD | 0 | - | 4.88 | 76,473 |
| Most Populous Modern-Day Countries in 1 AD | 0 | - | 4.98 | 93,135 |
| Most Populous Modern-Day Countries in 1800 AD | 0 | - | 4.93 | 67,479 |
| Most Populous Modern-Day Countries in 1500 AD | 0 | - | 4.93 | 73,819 |
| Most Populous Modern-Day Countries by Century | 0 | - | 4.98 | 97,682 |
| Sahara Desert Countries | 0 | - | 4.98 | 165,796 |
| Himalayan Countries | 0 | - | 4.93 | 139,888 |
| Andean Countries | 0 | - | 4.94 | 85,240 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 64,418 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 126,747 |
| Coffee Producing Countries | 0 | - | 4.83 | 67,984 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 66,287 |
| Danube Countries | 0 | - | 4.97 | 72,298 |
| Countries With an "Ish" Demonym | 0 | - | 4.98 | 117,453 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,742 |
| Countries with the Worst Passports | 0 | - | 4.93 | 84,921 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 150,421 |
| European Landlocked Countries | 0 | - | 4.99 | 147,496 |
| Partially Recognized Countries | 0 | - | 4.98 | 107,142 |
| Countries with the Most Species | 0 | - | 4.99 | 103,508 |
| Countries 197 to 205 | 0 | - | 4.90 | 71,287 |
| Countries Settled by Vikings | 0 | - | 4.92 | 122,005 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,724 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,837 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,770 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,507 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,936 |
| Countries in the Alps | 0 | - | 4.87 | 118,648 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 102,419 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 107,677 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,902 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,931 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,853 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 96,169 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 101,293 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,794 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,360 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 63,098 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,808 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.91 | 41,678 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,479 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,713 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,806 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 119,592 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,542 |
| Countries that Host the Most Refugees | 0 | - | 4.96 | 65,633 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 46,530 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 245,346 |
| World Countries - Blind Typing | 0 | - | 5.00 | 108,922 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,457 |
| Largest Countries By Category | 0 | - | 4.97 | 158,723 |
| Countries by Countries | 0 | - | 4.96 | 63,544 |
| Pixelated World Map | 0 | - | 5.00 | 143,993 |
| Country Flags with the Most White | 0 | - | 4.85 | 139,150 |
| Warsaw Pact Countries | 0 | - | 4.83 | 84,648 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,374 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 70,217 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,650 |
| All Countries by Population With a Map | 0 | - | 4.98 | 110,685 |
| Six Degrees of Separation - Countries #1 | 0 | - | 4.96 | 99,309 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 89,014 |
| Countries of the World with a Borderless Map | 0 | - | 4.99 | 82,697 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 334,728 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 376,422 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 409,197 |
| Island Countries | 0 | - | 4.99 | 712,220 |
| Modern-Day Countries of the Khmer Empire on a Map | 0 | - | 4.77 | 45,785 |
| Modern-Day Countries of the Mayan Civilization | 0 | - | 4.78 | 33,643 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,053,701 |
| Northernmost Countries | 0 | - | 4.99 | 363,593 |
| Countries of South America | 0 | - | 5.00 | 931,416 |
| Countries of Oceania | 0 | - | 5.00 | 1,061,800 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,886,414 |
| "Land" Countries | 0 | - | 4.98 | 338,175 |
| Most Populous Countries in 1900 | 0 | - | 4.91 | 174,182 |
| Countries by Independence Day | 0 | - | 4.62 | 52,850 |
| Former Countries by Capital | 0 | - | 4.45 | 127,772 |
| Former Countries | 0 | - | 4.77 | 134,150 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,391,596 |
| Mediterranean Countries with an Empty Map | 0 | - | 4.99 | 105,440 |
| Flags of Countries of the World in 1910 | 0 | - | 4.96 | 79,401 |
| Battle to Country | 0 | - | 4.91 | 53,886 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,201 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,722 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 174,915 |
| Countries with Megacities | 0 | - | 4.99 | 266,645 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 200,626 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,986 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 138,927 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 82,089 |
| Countries by Official Language | 0 | - | 4.95 | 195,843 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 297,416 |
| Countries in their Native Language | 0 | - | 4.99 | 199,615 |
| Subdivisions by Country | 0 | - | 4.87 | 50,578 |
| Megadiverse Countries | 0 | - | 4.96 | 135,216 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 132,825 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 55,496 |
| Countries with Multiple Big Islands | 0 | - | 4.92 | 126,404 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,200 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 163,491 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 154,523 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,788 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,231 |
| Countries by Sports League Revenue | 0 | - | 4.95 | 78,324 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 108,330 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,397 |
| Countries with the Highest HDI | 0 | - | 4.95 | 137,115 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,540 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,656 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 112,131 |
| World Map Quiz | 0 | - | 4.81 | 65,556 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 158,812 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,620 |
| Countries within the Arctic Circle - Map Quiz | 0 | - | 4.84 | 64,491 |
| Countries by Road Signs | 0 | - | 4.98 | 54,286 |
| Southernmost Countries of the World | 0 | - | 4.99 | 229,072 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 105,986 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 123,464 |
| Countries With the Most Languages | 0 | - | 4.90 | 203,341 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.96 | 111,324 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 94,450 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,653 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,638 |
| Tallest Countries North to South | 0 | - | 4.86 | 130,415 |
| Widest Countries East to West | 0 | - | 4.92 | 130,365 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,576 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 187,154 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,483 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 95,002 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,900 |
| Countries with the Most Desert | 0 | - | 4.93 | 128,396 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,474 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,873 |
| Countries With the Tallest People | 0 | - | 4.93 | 95,155 |
| Countries with Double Letters | 0 | - | 4.96 | 96,893 |
| Countries that End in N | 0 | - | 4.95 | 171,777 |
| Countries with Five Letters | 0 | - | 4.96 | 283,526 |
| Countries with Six Letters | 0 | - | 4.94 | 214,251 |
| Countries with W | 0 | - | 4.96 | 160,816 |
| Countries with Z | 0 | - | 4.98 | 292,235 |
| Countries with Letters Missing | 0 | - | 4.96 | 187,168 |
| Countries That End in U | 0 | - | 4.95 | 121,111 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 134,976 |
| Countries that End in O | 0 | - | 4.92 | 159,748 |
| Countries that End in R | 0 | - | 4.87 | 119,130 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,887 |
| Countries Ending in "IA" | 0 | - | 4.99 | 209,680 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 171,053 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,752 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 142,682 |
| Countries That End in Y | 0 | - | 4.91 | 186,047 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 198,348 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 153,179 |
| Countries that End in I | 0 | - | 4.94 | 135,266 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 184,515 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 96,004 |
| Countries That End in NIA | 0 | - | 4.92 | 109,994 |
| Countries That End in BIA | 0 | - | 4.93 | 149,509 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 167,432 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,702 |
| Countries That End in RIA | 0 | - | 4.93 | 127,010 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 111,304 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 228,400 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 134,075 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 126,515 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 92,083 |
| Add A Letter - Make a Country | 0 | - | 4.81 | 74,762 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 53,262 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,520 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,825 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,607 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,627 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 54,319 |
| Countries that End in L | 0 | - | 4.94 | 157,065 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 217,609 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,329 |
| City to Country Quiz #1 | 0 | - | 4.97 | 157,227 |
