| Countries of the World Quiz | 0 | - | 5.00 | 46,932,557 |
| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.97 | 109,544 |
| Landlocked Countries | 0 | - | 4.99 | 413,763 |
| Countries with the Most HIV | 0 | - | 4.46 | 44,312 |
| Countries with the Most Malaria Deaths | 0 | - | 4.47 | 44,873 |
| Countries with Glaciers | 0 | - | 4.97 | 104,675 |
| Countries with the Most Forest | 0 | - | 4.87 | 146,643 |
| Countries Reducing Carbon Dioxide Emissions the Most | 0 | - | 4.89 | 64,246 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,718,299 |
| Sahara Desert Countries | 0 | - | 4.98 | 160,654 |
| Himalayan Countries | 0 | - | 4.95 | 135,416 |
| Andean Countries | 0 | - | 4.94 | 82,849 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 62,238 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 123,236 |
| Coffee Producing Countries | 0 | - | 4.81 | 65,930 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 64,625 |
| Danube Countries | 0 | - | 4.97 | 71,096 |
| Countries With an "Ish" Demonym | 0 | - | 4.98 | 115,778 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 85,548 |
| Countries with the Worst Passports | 0 | - | 4.94 | 82,517 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 147,430 |
| European Landlocked Countries | 0 | - | 4.99 | 145,769 |
| Partially Recognized Countries | 0 | - | 4.98 | 105,231 |
| Countries with the Most Species | 0 | - | 4.99 | 95,248 |
| Countries 197 to 205 | 0 | - | 4.87 | 69,369 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,203 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,372 |
| Countries that Use the Peso | 0 | - | 4.88 | 58,965 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.89 | 72,582 |
| Countries with a AAA Credit Rating | 0 | - | 4.85 | 56,959 |
| Countries in the Alps | 0 | - | 4.86 | 116,848 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 94,583 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 105,281 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,021 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 95,433 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 115,185 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.91 | 95,015 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 99,594 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 52,772 |
| Largest Country by Body of Water | 0 | - | 4.96 | 57,355 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,078 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,200 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,051 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,461 |
| Arctic Ocean Countries | 0 | - | 4.95 | 78,760 |
| Countries with the Most Grassland | 0 | - | 4.93 | 76,764 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 117,103 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 67,660 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,260 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 44,784 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 239,376 |
| World Countries - Blind Typing | 0 | - | 5.00 | 105,717 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 47,611 |
| Largest Countries By Category | 0 | - | 4.97 | 156,782 |
| Countries by Countries | 0 | - | 4.96 | 62,270 |
| Country Flags with the Most White | 0 | - | 4.87 | 137,411 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 61,967 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,335 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 87,780 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 324,220 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 372,165 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 401,926 |
| Island Countries | 0 | - | 4.99 | 707,685 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,039,661 |
| Northernmost Countries | 0 | - | 4.99 | 357,811 |
| Countries of South America | 0 | - | 5.00 | 915,013 |
| Countries of Oceania | 0 | - | 5.00 | 1,040,826 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,848,912 |
| "Land" Countries | 0 | - | 4.98 | 333,688 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,362,703 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 171,352 |
| Countries with Megacities | 0 | - | 4.99 | 247,114 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 197,216 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 112,042 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 135,634 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 79,953 |
| Countries by Official Language | 0 | - | 4.95 | 192,805 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 293,170 |
| Countries in their Native Language | 0 | - | 4.99 | 196,666 |
| Independence from Whom | 0 | - | 4.99 | 209,742 |
| Subdivisions by Country | 0 | - | 4.86 | 50,071 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 130,790 |
| Megadiverse Countries | 0 | - | 4.97 | 133,913 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 129,826 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 54,923 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,432 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 74,865 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 161,685 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,016 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,051 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,162 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,220 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 44,751 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 75,605 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,434 |
| Countries Furthest from the United States | 0 | - | 4.94 | 88,503 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,509 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 74,692 |
| Most Dispersed Island Nations | 0 | - | 4.96 | 71,033 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 108,630 |
| World Map Quiz | 0 | - | 4.81 | 63,515 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 152,747 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 106,347 |
| Countries by Founding Story | 0 | - | 4.95 | 76,563 |
| Countries by Road Signs | 0 | - | 4.98 | 53,112 |
| Southernmost Countries of the World | 0 | - | 4.99 | 226,382 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 104,010 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 121,967 |
| Countries With the Most Languages | 0 | - | 4.90 | 199,811 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 109,868 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.89 | 93,076 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,289 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 60,957 |
| Tallest Countries North to South | 0 | - | 4.83 | 119,347 |
| Widest Countries East to West | 0 | - | 4.92 | 128,621 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,219 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 185,246 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 97,576 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 93,698 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 147,648 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,060 |
| Countries by Contribution to UN Budget | 0 | - | 4.86 | 69,053 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.84 | 34,588 |
| Countries with Double Letters | 0 | - | 4.97 | 93,413 |
| Countries that End in N | 0 | - | 4.94 | 156,905 |
| Countries with Five Letters Quiz | 0 | - | 4.96 | 258,717 |
| Countries with Six Letters | 0 | - | 4.93 | 210,393 |
| Countries with W | 0 | - | 4.97 | 158,243 |
| Countries with Z | 0 | - | 4.98 | 287,907 |
| Countries with Letters Missing | 0 | - | 4.97 | 184,570 |
| Countries That End in U | 0 | - | 4.95 | 119,527 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 132,591 |
| Countries that End in O | 0 | - | 4.92 | 158,568 |
| Countries that End in R | 0 | - | 4.87 | 118,280 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 154,863 |
| Countries Ending in "IA" | 0 | - | 4.99 | 207,076 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 169,357 |
| Countries by Last Two Letters | 0 | - | 4.85 | 134,508 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,043 |
| Countries That End in Y | 0 | - | 4.90 | 185,214 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 196,400 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 151,702 |
| Countries that End in I | 0 | - | 4.94 | 134,427 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 182,217 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,204 |
| Countries That End in NIA | 0 | - | 4.92 | 109,015 |
| Countries That End in BIA | 0 | - | 4.92 | 147,727 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,085 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 118,499 |
| Countries That End in RIA | 0 | - | 4.93 | 126,094 |
| Most Common Words in Official Country Names | 0 | - | 4.85 | 110,022 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 225,215 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 132,539 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 124,896 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 90,375 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 73,938 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,138 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 102,664 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 124,524 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 48,818 |
| Countries with the Word "And" | 0 | - | 4.99 | 116,164 |
| Countries Containing Two or More Words | 0 | - | 4.96 | 52,833 |
| Countries that End in L | 0 | - | 4.94 | 155,745 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 211,283 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 84,989 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,525 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,314 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,439 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 247,079 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 199,122 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 125,926 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 162,215 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.93 | 223,415 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 151,539 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 70,625 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.81 | 108,174 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,425 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,339 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,435,368 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 377,728 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,801,753 |
| One Border Countries | 0 | - | 4.98 | 464,492 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,588,812 |
| Countries that Desalinate the Most Water | 0 | - | 4.77 | 41,372 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.95 | 85,864 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 265,977 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 120,913 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 111,508 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 92,636 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 58,305 |
| Majority Muslim Countries | 0 | - | 4.98 | 368,626 |
| Countries by National Anthem | 0 | - | 4.93 | 71,035 |
| NATO Countries | 0 | - | 4.98 | 275,880 |
| EU Countries Quiz | 0 | - | 4.99 | 270,054 |
| Recently Independent Countries | 0 | - | 4.98 | 158,006 |
| French-Speaking Countries | 0 | - | 4.85 | 268,838 |
| Natural Features of Countries #1 | 0 | - | 4.86 | 83,384 |
| Countries That Use the Euro | 0 | - | 4.96 | 103,063 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 285,025 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 268,441 |
