| Countries of the World Quiz | 0 | - | 5.00 | 47,022,289 |
| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.97 | 109,566 |
| Landlocked Countries | 0 | - | 4.99 | 414,915 |
| Countries with the Most HIV | 0 | - | 4.46 | 44,350 |
| Countries with the Most Malaria Deaths | 0 | - | 4.45 | 44,977 |
| Countries with Glaciers | 0 | - | 4.97 | 104,744 |
| Countries with the Most Forest | 0 | - | 4.87 | 146,736 |
| Countries Reducing Carbon Dioxide Emissions the Most | 0 | - | 4.89 | 64,316 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,727,243 |
| Sahara Desert Countries | 0 | - | 4.98 | 161,111 |
| Himalayan Countries | 0 | - | 4.95 | 135,818 |
| Andean Countries | 0 | - | 4.94 | 83,092 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 62,418 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 123,523 |
| Coffee Producing Countries | 0 | - | 4.81 | 66,119 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 64,776 |
| Danube Countries | 0 | - | 4.97 | 71,218 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 115,944 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 85,669 |
| Countries with the Worst Passports | 0 | - | 4.94 | 82,773 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 147,681 |
| European Landlocked Countries | 0 | - | 4.99 | 145,915 |
| Partially Recognized Countries | 0 | - | 4.98 | 105,435 |
| Countries with the Most Species | 0 | - | 4.99 | 95,317 |
| Countries 197 to 205 | 0 | - | 4.89 | 69,578 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,249 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,422 |
| Countries that Use the Peso | 0 | - | 4.88 | 59,036 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 72,685 |
| Countries with a AAA Credit Rating | 0 | - | 4.85 | 57,048 |
| Countries in the Alps | 0 | - | 4.86 | 117,041 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 94,715 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 105,504 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,132 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 95,542 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 115,331 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.91 | 95,110 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 99,740 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 52,866 |
| Largest Country by Body of Water | 0 | - | 4.96 | 57,652 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,173 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,255 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,115 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,578 |
| Arctic Ocean Countries | 0 | - | 4.95 | 78,852 |
| Countries with the Most Grassland | 0 | - | 4.93 | 76,857 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 117,354 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 67,760 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,332 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 44,971 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 240,011 |
| World Countries - Blind Typing | 0 | - | 5.00 | 106,074 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 47,696 |
| Largest Countries By Category | 0 | - | 4.97 | 156,964 |
| Countries by Countries | 0 | - | 4.96 | 62,401 |
| Country Flags with the Most White | 0 | - | 4.87 | 137,591 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,008 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,369 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 87,896 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 325,457 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 372,577 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 402,508 |
| Island Countries | 0 | - | 4.99 | 708,117 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,041,204 |
| Northernmost Countries | 0 | - | 4.99 | 358,466 |
| Countries of South America | 0 | - | 5.00 | 917,046 |
| Countries of Oceania | 0 | - | 5.00 | 1,043,208 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,852,779 |
| "Land" Countries | 0 | - | 4.98 | 333,990 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,365,815 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 171,781 |
| Countries with Megacities | 0 | - | 4.99 | 247,923 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 197,662 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 112,282 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 136,045 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 80,233 |
| Countries by Official Language | 0 | - | 4.95 | 193,051 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 293,531 |
| Countries in their Native Language | 0 | - | 4.99 | 196,901 |
| Independence from Whom | 0 | - | 4.99 | 210,031 |
| Subdivisions by Country | 0 | - | 4.86 | 50,121 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 130,987 |
| Megadiverse Countries | 0 | - | 4.97 | 134,014 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 130,062 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 54,984 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,497 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 74,893 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 161,824 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,092 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,270 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,339 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,275 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 44,775 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 75,820 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,483 |
| Countries Furthest from the United States | 0 | - | 4.94 | 88,590 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,567 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 74,763 |
| Most Dispersed Island Nations | 0 | - | 4.96 | 71,100 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 108,981 |
| World Map Quiz | 0 | - | 4.81 | 63,712 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 153,406 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 106,509 |
| Countries by Founding Story | 0 | - | 4.95 | 76,669 |
| Countries by Road Signs | 0 | - | 4.98 | 53,246 |
| Southernmost Countries of the World | 0 | - | 4.99 | 226,693 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 104,451 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,188 |
| Countries With the Most Languages | 0 | - | 4.90 | 200,188 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,063 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,266 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,462 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,040 |
| Tallest Countries North to South | 0 | - | 4.83 | 119,498 |
| Widest Countries East to West | 0 | - | 4.92 | 128,986 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,276 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 185,417 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 97,632 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 93,824 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 147,772 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,183 |
| Countries by Contribution to UN Budget | 0 | - | 4.89 | 76,000 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.84 | 34,632 |
| Countries with Double Letters | 0 | - | 4.97 | 93,626 |
| Countries that End in N | 0 | - | 4.94 | 157,093 |
| Countries with Five Letters Quiz | 0 | - | 4.96 | 258,954 |
| Countries with Six Letters | 0 | - | 4.93 | 210,617 |
| Countries with W | 0 | - | 4.97 | 158,387 |
| Countries with Z | 0 | - | 4.98 | 288,166 |
| Countries with Letters Missing | 0 | - | 4.97 | 184,714 |
| Countries That End in U | 0 | - | 4.95 | 119,595 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 132,826 |
| Countries that End in O | 0 | - | 4.92 | 158,631 |
| Countries that End in R | 0 | - | 4.87 | 118,355 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 154,916 |
| Countries Ending in "IA" | 0 | - | 4.99 | 207,351 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 169,499 |
| Countries by Last Two Letters | 0 | - | 4.85 | 134,614 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,160 |
| Countries That End in Y | 0 | - | 4.90 | 185,271 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 196,566 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 151,857 |
| Countries that End in I | 0 | - | 4.94 | 134,521 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 182,408 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,279 |
| Countries That End in NIA | 0 | - | 4.92 | 109,094 |
| Countries That End in BIA | 0 | - | 4.92 | 147,826 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,214 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 118,607 |
| Countries That End in RIA | 0 | - | 4.93 | 126,179 |
| Most Common Words in Official Country Names | 0 | - | 4.85 | 110,140 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 225,619 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 132,638 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 124,996 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 90,517 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,006 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,255 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 102,765 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 124,653 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 48,875 |
| Countries with the Word "And" | 0 | - | 4.99 | 116,296 |
| Countries Containing Two or More Words | 0 | - | 4.96 | 52,956 |
| Countries that End in L | 0 | - | 4.94 | 156,137 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 211,923 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,017 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,602 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,419 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,502 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 247,841 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 199,574 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 141,340 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 162,605 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 223,964 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 151,883 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 70,793 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.81 | 108,229 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,452 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,400 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,437,273 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 378,192 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,806,170 |
| One Border Countries | 0 | - | 4.98 | 465,353 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,594,672 |
| Countries that Desalinate the Most Water | 0 | - | 4.77 | 41,412 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.95 | 86,105 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 266,402 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 121,107 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 111,596 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 92,886 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 58,467 |
| Majority Muslim Countries | 0 | - | 4.98 | 370,424 |
| Countries by National Anthem | 0 | - | 4.92 | 71,064 |
| NATO Countries | 0 | - | 4.98 | 276,974 |
| EU Countries Quiz | 0 | - | 4.99 | 270,709 |
| Recently Independent Countries | 0 | - | 4.98 | 158,148 |
| French-Speaking Countries | 0 | - | 4.85 | 269,165 |
| Natural Features of Countries #1 | 0 | - | 4.86 | 83,430 |
| Countries That Use the Euro | 0 | - | 4.95 | 103,420 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 285,558 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 269,193 |
