| Countries of the World Quiz | 0 | - | 5.00 | 44,338,548 |
| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.97 | 107,759 |
| Landlocked Countries Quiz | 0 | - | 4.99 | 382,908 |
| Countries with the Most HIV | 0 | - | 4.47 | 43,720 |
| Countries with the Most Malaria Deaths | 0 | - | 4.45 | 32,859 |
| Countries with Glaciers | 0 | - | 4.97 | 101,566 |
| Countries with the Most Forest | 0 | - | 4.88 | 142,890 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,407,767 |
| Countries Reducing Carbon Dioxide Emissions the Most | 0 | - | 4.81 | 54,639 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,476,365 |
| Sahara Desert Countries | 0 | - | 4.97 | 145,608 |
| Himalayan Countries | 0 | - | 4.94 | 122,272 |
| Andean Countries | 0 | - | 4.93 | 68,706 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 56,684 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 113,090 |
| Coffee Producing Countries | 0 | - | 4.83 | 59,913 |
| Countries with Shrinking Populations | 0 | - | 4.92 | 59,312 |
| Danube Countries | 0 | - | 4.97 | 60,841 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 96,875 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 81,901 |
| Countries with the Best Passports | 0 | - | 4.82 | 80,633 |
| Countries with the Worst Passports | 0 | - | 4.89 | 68,417 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 138,230 |
| European Landlocked Countries | 0 | - | 4.99 | 141,024 |
| Partially Recognized Countries | 0 | - | 4.98 | 98,096 |
| Countries with the Most Species | 0 | - | 4.99 | 92,342 |
| Countries 197 to 205 | 0 | - | 4.87 | 63,484 |
| Tropic of Cancer Countries | 0 | - | 4.95 | 46,693 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 45,790 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 52,583 |
| Countries that Use the Peso | 0 | - | 4.88 | 56,354 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.87 | 69,949 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 53,645 |
| Countries in the Alps | 0 | - | 4.86 | 110,445 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 90,727 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 97,825 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 75,394 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 83,746 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 110,642 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.90 | 91,954 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 95,008 |
| Five Biggest Countries by Longitude | 0 | - | 4.90 | 49,858 |
| Biggest Country by Body of Water | 0 | - | 4.95 | 47,969 |
| Countries with the Most Container Port Traffic | 0 | - | 4.91 | 58,795 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 72,730 |
| Bridge and Tunnel Borders | 0 | - | 4.95 | 51,263 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.89 | 39,100 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 100,162 |
| Arctic Ocean Countries | 0 | - | 4.94 | 75,846 |
| Countries with the Most Grassland | 0 | - | 4.93 | 73,536 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 109,025 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 64,808 |
| Countries that Host the Most Refugees | 0 | - | 4.94 | 56,745 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 222,136 |
| World Countries - Blind Typing | 0 | - | 5.00 | 95,145 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 45,107 |
| Largest Countries By Category | 0 | - | 4.97 | 151,396 |
| Countries by Countries | 0 | - | 4.96 | 58,469 |
| Country Flags with the Most White | 0 | - | 4.87 | 132,093 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 60,664 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.86 | 46,330 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 83,959 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 360,281 |
| Countries with the Most Tourists Quiz | 0 | - | 4.91 | 382,448 |
| Island Countries Quiz | 0 | - | 4.99 | 690,950 |
| Biggest Countries by Area | 0 | - | 5.00 | 990,037 |
| Northernmost Countries | 0 | - | 4.99 | 342,795 |
| Countries of South America | 0 | - | 5.00 | 863,367 |
| Countries of Oceania | 0 | - | 5.00 | 976,224 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,731,985 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,258,855 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 159,016 |
| Countries with Megacities | 0 | - | 4.99 | 218,267 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 186,873 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.97 | 106,305 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 126,765 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.97 | 73,308 |
| Top 50 Countries by Population - In Order | 0 | - | 4.97 | 270,083 |
| Countries by Official Language | 0 | - | 4.95 | 184,177 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 282,220 |
| Countries in their Native Language | 0 | - | 4.98 | 188,961 |
| Independence from Whom | 0 | - | 4.99 | 199,970 |
| Subdivisions by Country | 0 | - | 4.86 | 48,539 |
| Who Controlled These Colonies? | 0 | - | 4.90 | 123,829 |
| Megadiverse Countries | 0 | - | 4.96 | 130,523 |
| Countries With the Most English Speakers | 0 | - | 4.89 | 122,242 |
| Countries with Multiple Big Islands | 0 | - | 4.92 | 121,861 |
| Most Desired Destinations for Potential Migrants | 0 | - | 4.82 | 49,342 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 155,509 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 59,505 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 86,873 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.94 | 149,340 |
| Countries with Multiple Populous Islands | 0 | - | 4.91 | 80,463 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 43,431 |
| Countries by Sports League Revenue | 0 | - | 4.93 | 67,583 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 104,896 |
| Countries Furthest from the United States | 0 | - | 4.95 | 85,998 |
| Countries with the Highest HDI | 0 | - | 4.95 | 134,239 |
| Straight Shot to the Arctic Circle | 0 | - | 4.89 | 72,191 |
| Most Dispersed Island Nations | 0 | - | 4.96 | 68,656 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 98,306 |
| World Map Quiz | 0 | - | 4.88 | 57,771 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 135,267 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 86,797 |
| Countries by Founding Story | 0 | - | 4.94 | 72,906 |
| Southernmost Countries of the World | 0 | - | 4.99 | 218,708 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 98,816 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 116,659 |
| Countries With the Most Languages | 0 | - | 4.89 | 189,427 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.93 | 92,579 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.89 | 88,648 |
| Countries with the Most Prisoners | 0 | - | 4.93 | 93,655 |
| Countries with the Most Domestic Camels | 0 | - | 4.93 | 58,409 |
| Tallest Countries North to South | 0 | - | 4.85 | 115,673 |
| Widest Countries East to West | 0 | - | 4.92 | 124,813 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 70,211 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 180,166 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 95,486 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 90,329 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 125,502 |
| Countries with the Most Desert | 0 | - | 4.93 | 123,410 |
| Countries by Contribution to UN Budget | 0 | - | 4.85 | 68,050 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 33,574 |
| Countries with Double Letters | 0 | - | 4.96 | 82,457 |
| Countries that End in N | 0 | - | 4.93 | 146,381 |
| Countries with Five Letters Quiz | 0 | - | 4.96 | 246,360 |
| Countries with Six Letters Quiz | 0 | - | 4.94 | 200,756 |
| Countries with W | 0 | - | 4.97 | 149,761 |
| Countries with Z | 0 | - | 4.98 | 276,287 |
| Countries with Letters Missing | 0 | - | 4.97 | 176,684 |
| Countries That End in U | 0 | - | 4.95 | 114,460 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 100,766 |
| Countries that End in O | 0 | - | 4.91 | 154,544 |
| Countries that End in R | 0 | - | 4.84 | 100,035 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 152,011 |
| Countries Ending in "IA" | 0 | - | 4.99 | 198,335 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 163,474 |
| Countries by Last Two Letters | 0 | - | 4.87 | 121,961 |
| Countries by First and Last Letter #2 | 0 | - | 4.95 | 135,723 |
| Countries That End in Y | 0 | - | 4.91 | 182,207 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 189,414 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.91 | 127,639 |
| Countries that End in I | 0 | - | 4.92 | 117,516 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 158,544 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 92,283 |
| Countries That End in NIA | 0 | - | 4.92 | 105,203 |
| Countries That End in BIA | 0 | - | 4.92 | 142,857 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 161,378 |
| Countries Whose Names Start with Saint | 0 | - | 4.86 | 114,870 |
| Countries That End in RIA | 0 | - | 4.89 | 105,572 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 106,016 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 215,568 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 127,404 |
| Divided Country Name Puzzle #3 | 0 | - | 4.91 | 119,258 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 4.99 | 85,099 |
| Add A Letter - Make a Country | 0 | - | 4.81 | 71,277 |
| Countries With One Word and Three A's | 0 | - | 4.94 | 48,709 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 98,214 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.97 | 120,121 |
| Countries that are Free from U.S.A. | 0 | - | 4.87 | 46,347 |
| Countries with the Word "And" | 0 | - | 4.98 | 89,978 |
| Countries Containing Two or More Words | 0 | - | 4.96 | 47,906 |
| Countries that End in L | 0 | - | 4.94 | 151,903 |
| "Land" Countries | 0 | - | 4.98 | 299,838 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 197,715 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 83,965 |
| City to Country Quiz #1 | 0 | - | 4.96 | 150,679 |
| City to Country Quiz #3 | 0 | - | 4.87 | 104,811 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 75,681 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 219,416 |
| Five Poorest Countries by Continent | 0 | - | 4.94 | 192,538 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 122,175 |
| Five Smallest Countries by Continent | 0 | - | 4.97 | 141,991 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.93 | 216,098 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.97 | 147,273 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.88 | 68,773 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.83 | 106,042 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 84,896 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 59,844 |
| Biggest Countries by Population | 0 | - | 4.99 | 1,382,156 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 364,943 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,633,837 |
| One Border Countries | 0 | - | 4.98 | 445,291 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.96 | 81,937 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 257,542 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 116,016 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 107,900 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 88,248 |
| Countries by Population Range - Tile Select | 0 | - | 4.85 | 55,021 |
| Majority Muslim Countries | 0 | - | 4.98 | 330,009 |
| Countries by National Anthem | 0 | - | 4.92 | 69,927 |
| NATO Countries Quiz | 0 | - | 4.98 | 257,895 |
| EU Countries Quiz | 0 | - | 4.99 | 254,653 |
| Recently Independent Countries Quiz | 0 | - | 4.98 | 152,303 |
| French-Speaking Countries | 0 | - | 4.85 | 257,955 |
| Natural Features of Countries #1 | 0 | - | 4.85 | 80,809 |
| Countries That Use the Euro | 0 | - | 4.93 | 76,068 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 267,313 |
| Countries with Nuclear Weapons | 0 | - | 4.89 | 248,810 |
| German-Speaking Countries | 0 | - | 4.89 | 121,177 |
