| Countries of the World Quiz | 0 | - | 5.00 | 46,940,148 |
| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.97 | 109,547 |
| Landlocked Countries | 0 | - | 4.99 | 413,837 |
| Countries with the Most HIV | 0 | - | 4.46 | 44,316 |
| Countries with the Most Malaria Deaths | 0 | - | 4.47 | 44,881 |
| Countries with Glaciers | 0 | - | 4.97 | 104,684 |
| Countries with the Most Forest | 0 | - | 4.87 | 146,655 |
| Countries Reducing Carbon Dioxide Emissions the Most | 0 | - | 4.89 | 64,250 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,719,048 |
| Sahara Desert Countries | 0 | - | 4.98 | 160,682 |
| Himalayan Countries | 0 | - | 4.95 | 135,444 |
| Andean Countries | 0 | - | 4.94 | 82,857 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 62,254 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 123,255 |
| Coffee Producing Countries | 0 | - | 4.81 | 65,940 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 64,632 |
| Danube Countries | 0 | - | 4.97 | 71,097 |
| Countries With an "Ish" Demonym | 0 | - | 4.98 | 115,786 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 85,555 |
| Countries with the Worst Passports | 0 | - | 4.94 | 82,529 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 147,453 |
| European Landlocked Countries | 0 | - | 4.99 | 145,780 |
| Partially Recognized Countries | 0 | - | 4.98 | 105,241 |
| Countries with the Most Species | 0 | - | 4.99 | 95,254 |
| Countries 197 to 205 | 0 | - | 4.87 | 69,386 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,205 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,375 |
| Countries that Use the Peso | 0 | - | 4.88 | 58,971 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.89 | 72,591 |
| Countries with a AAA Credit Rating | 0 | - | 4.85 | 56,966 |
| Countries in the Alps | 0 | - | 4.86 | 116,865 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 94,587 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 105,290 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,025 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 95,441 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 115,198 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.91 | 95,024 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 99,600 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 52,777 |
| Largest Country by Body of Water | 0 | - | 4.96 | 57,396 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,082 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,202 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,053 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,464 |
| Arctic Ocean Countries | 0 | - | 4.95 | 78,775 |
| Countries with the Most Grassland | 0 | - | 4.93 | 76,770 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 117,122 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 67,665 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,266 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 44,800 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 239,425 |
| World Countries - Blind Typing | 0 | - | 5.00 | 105,742 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 47,616 |
| Largest Countries By Category | 0 | - | 4.97 | 156,800 |
| Countries by Countries | 0 | - | 4.96 | 62,276 |
| Country Flags with the Most White | 0 | - | 4.87 | 137,426 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 61,973 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,339 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 87,789 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 324,348 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 372,183 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 401,978 |
| Island Countries | 0 | - | 4.99 | 707,715 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,039,786 |
| Northernmost Countries | 0 | - | 4.99 | 357,861 |
| Countries of South America | 0 | - | 5.00 | 915,238 |
| Countries of Oceania | 0 | - | 5.00 | 1,041,055 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,849,309 |
| "Land" Countries | 0 | - | 4.98 | 333,712 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,362,971 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 171,423 |
| Countries with Megacities | 0 | - | 4.99 | 247,232 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 197,261 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 112,080 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 135,697 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 79,997 |
| Countries by Official Language | 0 | - | 4.95 | 192,816 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 293,183 |
| Countries in their Native Language | 0 | - | 4.99 | 196,684 |
| Independence from Whom | 0 | - | 4.99 | 209,764 |
| Subdivisions by Country | 0 | - | 4.86 | 50,079 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 130,807 |
| Megadiverse Countries | 0 | - | 4.97 | 133,922 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 129,841 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 54,928 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,437 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 74,866 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 161,697 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,022 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,082 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,166 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,224 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 44,752 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 75,634 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,438 |
| Countries Furthest from the United States | 0 | - | 4.94 | 88,508 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,513 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 74,699 |
| Most Dispersed Island Nations | 0 | - | 4.96 | 71,034 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 108,648 |
| World Map Quiz | 0 | - | 4.81 | 63,528 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 152,813 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 106,356 |
| Countries by Founding Story | 0 | - | 4.95 | 76,569 |
| Countries by Road Signs | 0 | - | 4.98 | 53,122 |
| Southernmost Countries of the World | 0 | - | 4.99 | 226,405 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 104,022 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 121,975 |
| Countries With the Most Languages | 0 | - | 4.90 | 199,837 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 109,883 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.89 | 93,089 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,300 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 60,959 |
| Tallest Countries North to South | 0 | - | 4.83 | 119,352 |
| Widest Countries East to West | 0 | - | 4.92 | 128,625 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,219 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 185,255 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 97,583 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 93,703 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 147,660 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,074 |
| Countries by Contribution to UN Budget | 0 | - | 4.86 | 69,055 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.84 | 34,590 |
| Countries with Double Letters | 0 | - | 4.97 | 93,432 |
| Countries that End in N | 0 | - | 4.94 | 156,928 |
| Countries with Five Letters Quiz | 0 | - | 4.96 | 258,735 |
| Countries with Six Letters | 0 | - | 4.93 | 210,403 |
| Countries with W | 0 | - | 4.97 | 158,259 |
| Countries with Z | 0 | - | 4.98 | 287,927 |
| Countries with Letters Missing | 0 | - | 4.97 | 184,582 |
| Countries That End in U | 0 | - | 4.95 | 119,534 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 132,618 |
| Countries that End in O | 0 | - | 4.92 | 158,572 |
| Countries that End in R | 0 | - | 4.87 | 118,287 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 154,867 |
| Countries Ending in "IA" | 0 | - | 4.99 | 207,110 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 169,366 |
| Countries by Last Two Letters | 0 | - | 4.85 | 134,518 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,056 |
| Countries That End in Y | 0 | - | 4.90 | 185,221 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 196,416 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 151,716 |
| Countries that End in I | 0 | - | 4.94 | 134,435 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 182,246 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,212 |
| Countries That End in NIA | 0 | - | 4.92 | 109,024 |
| Countries That End in BIA | 0 | - | 4.92 | 147,734 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,097 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 118,506 |
| Countries That End in RIA | 0 | - | 4.93 | 126,101 |
| Most Common Words in Official Country Names | 0 | - | 4.85 | 110,030 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 225,234 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 132,544 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 124,906 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 90,388 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 73,947 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,145 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 102,672 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 124,539 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 48,824 |
| Countries with the Word "And" | 0 | - | 4.99 | 116,176 |
| Countries Containing Two or More Words | 0 | - | 4.96 | 52,847 |
| Countries that End in L | 0 | - | 4.94 | 155,763 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 211,363 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 84,995 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,531 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,320 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,444 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 247,149 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 199,142 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 125,938 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 162,230 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.93 | 223,438 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 151,549 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 70,631 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.81 | 108,175 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,426 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,344 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,435,511 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 377,768 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,802,094 |
| One Border Countries | 0 | - | 4.98 | 464,572 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,589,175 |
| Countries that Desalinate the Most Water | 0 | - | 4.77 | 41,376 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.95 | 85,878 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 266,011 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 120,936 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 111,518 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 92,653 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 58,322 |
| Majority Muslim Countries | 0 | - | 4.98 | 368,670 |
| Countries by National Anthem | 0 | - | 4.93 | 71,038 |
| NATO Countries | 0 | - | 4.98 | 275,950 |
| EU Countries Quiz | 0 | - | 4.99 | 270,091 |
| Recently Independent Countries | 0 | - | 4.98 | 158,021 |
| French-Speaking Countries | 0 | - | 4.85 | 268,857 |
| Natural Features of Countries #1 | 0 | - | 4.86 | 83,385 |
| Countries That Use the Euro | 0 | - | 4.96 | 103,092 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 285,075 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 268,505 |
