| Countries of the World in 1900 | 0 | - | 4.89 | 85,822 |
| Countries of the World in 1914 with a Map | 0 | - | 4.99 | 196,551 |
| Countries of the World in 1945 with a Map | 0 | - | 5.00 | 151,984 |
| Countries of Europe in 1444 | 0 | - | 4.92 | 100,461 |
| 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 | 212,872 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 133,301 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,789 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 95,001 |
| Countries by Founding Story | 0 | - | 4.95 | 77,725 |
| Modern-Day Countries of the Umayyad Caliphate on a Map | 0 | - | 4.98 | 69,122 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,845,696 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,648,861 |
| Recently Independent Countries | 0 | - | 4.98 | 159,880 |
| Countries by Former Name | 0 | - | 4.99 | 125,722 |
| Historical City to Country | 0 | - | 4.85 | 78,959 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,813,433 |
| Landlocked Countries | 0 | - | 4.99 | 424,876 |
| Save Humanity by Guessing Countries | 0 | - | 4.98 | 586,029 |
| Countries of Europe in 1000 with a Map | 0 | - | 4.78 | 43,579 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,798,721 |
| Most Populous Countries by Year | 0 | - | 4.83 | 111,299 |
| First Countries to Reach 5 Million People | 0 | - | 4.93 | 135,821 |
| Most Populous Modern-Day Countries in 1000 AD | 0 | - | 4.88 | 76,474 |
| Most Populous Modern-Day Countries in 1 AD | 0 | - | 4.98 | 93,138 |
| Most Populous Modern-Day Countries in 1800 AD | 0 | - | 4.93 | 67,480 |
| Most Populous Modern-Day Countries in 1500 AD | 0 | - | 4.93 | 73,827 |
| Most Populous Modern-Day Countries by Century | 0 | - | 4.98 | 97,685 |
| Sahara Desert Countries | 0 | - | 4.98 | 165,812 |
| Himalayan Countries | 0 | - | 4.93 | 139,897 |
| Andean Countries | 0 | - | 4.94 | 85,248 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 64,419 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 126,752 |
| Coffee Producing Countries | 0 | - | 4.83 | 67,988 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 66,292 |
| Danube Countries | 0 | - | 4.97 | 72,299 |
| Countries With an "Ish" Demonym | 0 | - | 4.98 | 117,457 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,744 |
| Countries with the Worst Passports | 0 | - | 4.93 | 84,926 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 150,426 |
| European Landlocked Countries | 0 | - | 4.99 | 147,500 |
| Partially Recognized Countries | 0 | - | 4.98 | 107,147 |
| Countries with the Most Species | 0 | - | 4.99 | 103,509 |
| Countries 197 to 205 | 0 | - | 4.90 | 71,289 |
| Countries Settled by Vikings | 0 | - | 4.92 | 122,007 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,725 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,838 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,773 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,507 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,937 |
| Countries in the Alps | 0 | - | 4.87 | 118,651 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 102,423 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 107,681 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,903 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,933 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,856 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 96,170 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 101,295 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,796 |
| 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 | 53,809 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.91 | 41,682 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,480 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,714 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,808 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 119,601 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,546 |
| Countries that Host the Most Refugees | 0 | - | 4.96 | 65,636 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 46,535 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 245,355 |
| World Countries - Blind Typing | 0 | - | 5.00 | 108,927 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,457 |
| Largest Countries By Category | 0 | - | 4.97 | 158,728 |
| Countries by Countries | 0 | - | 4.96 | 63,547 |
| Pixelated World Map | 0 | - | 5.00 | 143,993 |
| Country Flags with the Most White | 0 | - | 4.85 | 139,155 |
| Warsaw Pact Countries | 0 | - | 4.83 | 84,649 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,375 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 70,219 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,651 |
| All Countries by Population With a Map | 0 | - | 4.98 | 110,696 |
| Six Degrees of Separation - Countries #1 | 0 | - | 4.96 | 99,312 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 89,018 |
| Countries of the World with a Borderless Map | 0 | - | 4.99 | 82,698 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 334,749 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 376,427 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 409,215 |
| Island Countries | 0 | - | 4.99 | 712,233 |
| Modern-Day Countries of the Khmer Empire on a Map | 0 | - | 4.77 | 45,786 |
| Modern-Day Countries of the Mayan Civilization | 0 | - | 4.78 | 33,643 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,053,738 |
| Northernmost Countries | 0 | - | 4.99 | 363,605 |
| Countries of South America | 0 | - | 5.00 | 931,449 |
| Countries of Oceania | 0 | - | 5.00 | 1,061,833 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,886,500 |
| "Land" Countries | 0 | - | 4.98 | 338,181 |
| Most Populous Countries in 1900 | 0 | - | 4.91 | 174,184 |
| 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 | 3,391,689 |
| Mediterranean Countries with an Empty Map | 0 | - | 4.99 | 105,440 |
| Flags of Countries of the World in 1910 | 0 | - | 4.96 | 79,405 |
| Battle to Country | 0 | - | 4.91 | 53,887 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,204 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 174,925 |
| Countries with Megacities | 0 | - | 4.99 | 266,665 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 200,634 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,987 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 138,934 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 82,100 |
| Countries by Official Language | 0 | - | 4.95 | 195,847 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 297,420 |
| Countries in their Native Language | 0 | - | 4.99 | 199,618 |
| Subdivisions by Country | 0 | - | 4.87 | 50,580 |
| Megadiverse Countries | 0 | - | 4.96 | 135,218 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 132,831 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 55,497 |
| Countries with Multiple Big Islands | 0 | - | 4.92 | 126,406 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,200 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 163,496 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 154,526 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,789 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,232 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 78,331 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 108,331 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,400 |
| Countries with the Highest HDI | 0 | - | 4.95 | 137,115 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,543 |
| Most Dispersed Island Nations | 0 | - | 4.96 | 71,657 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 112,135 |
| World Map Quiz | 0 | - | 4.81 | 65,563 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 158,827 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,625 |
| Countries within the Arctic Circle - Map Quiz | 0 | - | 4.84 | 64,492 |
| Countries by Road Signs | 0 | - | 4.98 | 54,288 |
| Southernmost Countries of the World | 0 | - | 4.99 | 229,077 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 105,987 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 123,471 |
| Countries With the Most Languages | 0 | - | 4.90 | 203,345 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.96 | 111,327 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 94,452 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,655 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,640 |
| Tallest Countries North to South | 0 | - | 4.86 | 130,428 |
| Widest Countries East to West | 0 | - | 4.92 | 130,368 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,576 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 187,157 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,484 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 95,003 |
| 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 | 34,874 |
| Countries With the Tallest People | 0 | - | 4.93 | 95,159 |
| Countries with Double Letters | 0 | - | 4.96 | 96,902 |
| Countries that End in N | 0 | - | 4.94 | 171,780 |
| Countries with Five Letters | 0 | - | 4.96 | 283,533 |
| Countries with Six Letters | 0 | - | 4.94 | 214,258 |
| Countries with W | 0 | - | 4.96 | 160,818 |
| Countries with Z | 0 | - | 4.98 | 292,241 |
| Countries with Letters Missing | 0 | - | 4.96 | 187,171 |
| Countries That End in U | 0 | - | 4.95 | 121,112 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 134,979 |
| Countries that End in O | 0 | - | 4.92 | 159,750 |
| Countries that End in R | 0 | - | 4.87 | 119,132 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,889 |
| Countries Ending in "IA" | 0 | - | 4.99 | 209,684 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 171,055 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,755 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 142,685 |
| Countries That End in Y | 0 | - | 4.91 | 186,047 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 198,352 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 153,183 |
| Countries that End in I | 0 | - | 4.94 | 135,267 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 184,515 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 96,006 |
| Countries That End in NIA | 0 | - | 4.92 | 109,994 |
| Countries That End in BIA | 0 | - | 4.93 | 149,511 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 167,436 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,702 |
| Countries That End in RIA | 0 | - | 4.93 | 127,011 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 111,305 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 228,402 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 134,077 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 126,518 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 92,091 |
| Add A Letter - Make a Country | 0 | - | 4.81 | 74,763 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 53,264 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,520 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,827 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,608 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,632 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 54,321 |
| Countries that End in L | 0 | - | 4.94 | 157,065 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 217,670 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,330 |
| City to Country Quiz #1 | 0 | - | 4.97 | 157,261 |
