| Countries of the World Quiz | 0 | - | 5.00 | 48,006,238 |
| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.97 | 110,059 |
| Landlocked Countries | 0 | - | 4.99 | 427,699 |
| Countries with the Most HIV | 0 | - | 4.46 | 44,561 |
| Countries with the Most Malaria Deaths | 0 | - | 4.45 | 45,648 |
| Countries with Glaciers | 0 | - | 4.97 | 105,919 |
| Countries with the Most Forest | 0 | - | 4.88 | 148,330 |
| Countries Reducing Carbon Dioxide Emissions the Most | 0 | - | 4.89 | 65,075 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,815,567 |
| Sahara Desert Countries | 0 | - | 4.98 | 167,128 |
| Himalayan Countries | 0 | - | 4.93 | 141,013 |
| Andean Countries | 0 | - | 4.94 | 85,897 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 65,008 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 127,626 |
| Coffee Producing Countries | 0 | - | 4.83 | 68,551 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 66,762 |
| Danube Countries | 0 | - | 4.97 | 72,607 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 117,872 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 87,021 |
| Countries with the Worst Passports | 0 | - | 4.93 | 85,528 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 151,013 |
| European Landlocked Countries | 0 | - | 4.99 | 147,820 |
| Partially Recognized Countries | 0 | - | 4.98 | 107,606 |
| Countries with the Most Species | 0 | - | 4.99 | 103,672 |
| Countries 197 to 205 | 0 | - | 4.90 | 71,711 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,833 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,975 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,960 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,708 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 58,176 |
| Countries in the Alps | 0 | - | 4.87 | 119,049 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 103,123 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 108,256 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 79,091 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 97,220 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 117,192 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 96,425 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 101,644 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 54,033 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,539 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 63,350 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,977 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.91 | 41,851 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,707 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,962 |
| Countries with the Most Grassland | 0 | - | 4.94 | 78,064 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 120,257 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,768 |
| Countries that Host the Most Refugees | 0 | - | 4.96 | 76,774 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 46,904 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 246,562 |
| World Countries - Blind Typing | 0 | - | 5.00 | 109,633 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,642 |
| Largest Countries By Category | 0 | - | 4.97 | 159,189 |
| Countries by Countries | 0 | - | 4.97 | 63,853 |
| Country Flags with the Most White | 0 | - | 4.85 | 139,521 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,459 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,717 |
| Six Degrees of Separation - Countries #1 | 0 | - | 4.96 | 99,602 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 89,290 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 337,037 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 377,178 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 410,638 |
| Island Countries | 0 | - | 4.99 | 713,194 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,056,719 |
| Northernmost Countries | 0 | - | 4.99 | 364,832 |
| Countries of South America | 0 | - | 5.00 | 934,915 |
| Countries of Oceania | 0 | - | 5.00 | 1,066,261 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,894,642 |
| "Land" Countries | 0 | - | 4.98 | 339,172 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,398,465 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 175,652 |
| Countries with Megacities | 0 | - | 4.99 | 268,174 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 201,296 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 114,410 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 139,631 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 82,523 |
| Countries by Official Language | 0 | - | 4.95 | 196,328 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 298,088 |
| Countries in their Native Language | 0 | - | 4.99 | 200,039 |
| Independence from Whom | 0 | - | 4.99 | 213,537 |
| Subdivisions by Country | 0 | - | 4.87 | 50,682 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 133,751 |
| Megadiverse Countries | 0 | - | 4.96 | 149,766 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 133,216 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 55,595 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 126,846 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,272 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 164,550 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,957 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 95,375 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 154,655 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 96,210 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,299 |
| Countries by Sports League Revenue | 0 | - | 4.95 | 78,896 |
| Landmarks of Countries #1 | 0 | - | 4.89 | 108,517 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,531 |
| Countries with the Highest HDI | 0 | - | 4.95 | 137,249 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,670 |
| Most Dispersed Island Nations | 0 | - | 4.96 | 72,011 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 112,888 |
| World Map Quiz | 0 | - | 4.81 | 65,983 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 160,166 |
| Smallest Countries with at Least One Border | 0 | - | 4.88 | 107,863 |
| Countries by Founding Story | 0 | - | 4.95 | 77,948 |
| Countries by Road Signs | 0 | - | 4.98 | 54,498 |
| Southernmost Countries of the World | 0 | - | 4.99 | 229,631 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 106,290 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 123,764 |
| Countries With the Most Languages | 0 | - | 4.90 | 204,065 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.96 | 111,615 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 94,732 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,904 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,786 |
| Tallest Countries North to South | 0 | - | 4.85 | 131,014 |
| Widest Countries East to West | 0 | - | 4.92 | 130,907 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,637 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 187,467 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,586 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 95,196 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 149,488 |
| Countries with the Most Desert | 0 | - | 4.93 | 128,649 |
| Countries by Contribution to UN Budget | 0 | - | 4.88 | 77,547 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,934 |
| Countries with Double Letters | 0 | - | 4.96 | 97,775 |
| Countries that End in N | 0 | - | 4.95 | 172,776 |
| Countries with Five Letters | 0 | - | 4.96 | 284,836 |
| Countries with Six Letters | 0 | - | 4.94 | 215,110 |
| Countries with W | 0 | - | 4.96 | 161,423 |
| Countries with Z | 0 | - | 4.98 | 293,165 |
| Countries with Letters Missing | 0 | - | 4.96 | 187,793 |
| Countries That End in U | 0 | - | 4.95 | 121,455 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 135,547 |
| Countries that End in O | 0 | - | 4.92 | 160,423 |
| Countries that End in R | 0 | - | 4.87 | 119,315 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 156,086 |
| Countries Ending in "IA" | 0 | - | 4.99 | 210,260 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 187,622 |
| Countries by Last Two Letters | 0 | - | 4.85 | 136,300 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 143,972 |
| Countries That End in Y | 0 | - | 4.91 | 186,204 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 199,514 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 153,482 |
| Countries that End in I | 0 | - | 4.94 | 135,461 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 185,447 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 96,181 |
| Countries That End in NIA | 0 | - | 4.92 | 110,194 |
| Countries That End in BIA | 0 | - | 4.93 | 149,788 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 168,002 |
| Countries Whose Names Start with Saint | 0 | - | 4.88 | 119,949 |
| Countries That End in RIA | 0 | - | 4.93 | 127,196 |
| Most Common Words in Official Country Names | 0 | - | 4.85 | 111,590 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 229,065 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 134,464 |
| Divided Country Name Puzzle #3 | 0 | - | 4.93 | 126,925 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 92,485 |
| Add A Letter - Make a Country | 0 | - | 4.81 | 74,956 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 53,515 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,621 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 126,113 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,772 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,968 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 54,686 |
| Countries that End in L | 0 | - | 4.94 | 157,294 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 218,808 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,391 |
| City to Country Quiz #1 | 0 | - | 4.96 | 157,918 |
| City to Country Quiz #3 | 0 | - | 4.88 | 120,186 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 79,570 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 250,758 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 201,377 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 143,569 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 164,474 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 226,261 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 153,359 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 71,310 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.81 | 108,986 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,894 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 63,390 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,456,820 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 383,201 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,855,446 |
| One Border Countries | 0 | - | 4.98 | 472,850 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,662,314 |
| Countries that Desalinate the Most Water | 0 | - | 4.77 | 41,973 |
| Every Country in its Official/Native Language | 0 | - | 4.98 | 25,781 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.96 | 87,508 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 269,624 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 122,889 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 113,267 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.91 | 94,425 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 59,762 |
| Majority Muslim Countries | 0 | - | 4.98 | 378,676 |
| Countries by National Anthem | 0 | - | 4.92 | 71,449 |
| NATO Countries | 0 | - | 4.98 | 284,262 |
| EU Countries Quiz | 0 | - | 4.99 | 279,182 |
| Recently Independent Countries | 0 | - | 4.98 | 160,581 |
| French-Speaking Countries | 0 | - | 4.85 | 271,995 |
| Natural Features of Countries #1 | 0 | - | 4.87 | 84,276 |
| Countries That Use the Euro | 0 | - | 4.95 | 107,364 |
