| Countries of Europe Quiz | 0 | - | 5.00 | 3,480,118 |
| Countries of South America | 0 | - | 5.00 | 864,168 |
| Countries of Oceania | 0 | - | 5.00 | 977,435 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,733,857 |
| Landlocked Countries Quiz | 0 | - | 4.99 | 383,573 |
| Countries of the World Quiz | 0 | - | 5.00 | 44,382,380 |
| Sahara Desert Countries | 0 | - | 4.97 | 145,911 |
| Himalayan Countries | 0 | - | 4.94 | 122,563 |
| Andean Countries | 0 | - | 4.93 | 68,901 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 56,844 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 113,329 |
| Coffee Producing Countries | 0 | - | 4.83 | 60,055 |
| Countries with Shrinking Populations | 0 | - | 4.92 | 59,422 |
| Danube Countries | 0 | - | 4.97 | 60,918 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 96,972 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 81,962 |
| Countries with the Best Passports | 0 | - | 4.84 | 80,980 |
| Countries with the Worst Passports | 0 | - | 4.91 | 71,976 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 138,480 |
| European Landlocked Countries | 0 | - | 4.99 | 141,090 |
| Partially Recognized Countries | 0 | - | 4.98 | 98,252 |
| Countries with the Most Species | 0 | - | 4.99 | 92,395 |
| Countries 197 to 205 | 0 | - | 4.87 | 63,623 |
| Tropic of Cancer Countries | 0 | - | 4.95 | 46,729 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 45,827 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 52,647 |
| Countries that Use the Peso | 0 | - | 4.89 | 56,432 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.87 | 69,998 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 53,736 |
| Countries in the Alps | 0 | - | 4.86 | 110,713 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 90,803 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 97,976 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 75,452 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 83,825 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 110,713 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.90 | 92,014 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 95,096 |
| Five Biggest Countries by Longitude | 0 | - | 4.90 | 49,924 |
| Biggest Country by Body of Water | 0 | - | 4.95 | 48,017 |
| Countries with the Most Container Port Traffic | 0 | - | 4.91 | 58,872 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 72,775 |
| Bridge and Tunnel Borders | 0 | - | 4.95 | 51,305 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.89 | 39,131 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 100,220 |
| Arctic Ocean Countries | 0 | - | 4.94 | 75,905 |
| Countries with the Most Grassland | 0 | - | 4.93 | 73,614 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 109,178 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 64,875 |
| Countries that Host the Most Refugees | 0 | - | 4.94 | 56,809 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 222,454 |
| World Countries - Blind Typing | 0 | - | 5.00 | 95,333 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 45,169 |
| Largest Countries By Category | 0 | - | 4.97 | 151,519 |
| Countries by Countries | 0 | - | 4.96 | 58,526 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,411,502 |
| Country Flags with the Most White | 0 | - | 4.87 | 132,185 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 60,694 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 84,026 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 360,485 |
| Countries with the Most Tourists Quiz | 0 | - | 4.91 | 382,767 |
| Island Countries Quiz | 0 | - | 4.99 | 691,374 |
| Biggest Countries by Area | 0 | - | 5.00 | 990,701 |
| Northernmost Countries | 0 | - | 4.99 | 342,965 |
| Countries of North America Quiz | 0 | - | 5.00 | 955,705 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,261,051 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 159,310 |
| Countries with Megacities | 0 | - | 4.99 | 218,554 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 187,040 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.97 | 106,395 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 126,926 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.97 | 73,423 |
| Top 50 Countries by Population - In Order | 0 | - | 4.97 | 270,389 |
| Countries by Official Language | 0 | - | 4.95 | 184,333 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 282,432 |
| Countries in their Native Language | 0 | - | 4.98 | 189,073 |
| Independence from Whom | 0 | - | 4.99 | 200,131 |
| Subdivisions by Country | 0 | - | 4.85 | 48,571 |
| Who Controlled These Colonies? | 0 | - | 4.90 | 123,940 |
| Megadiverse Countries | 0 | - | 4.96 | 130,575 |
| Countries With the Most English Speakers | 0 | - | 4.89 | 122,378 |
| Countries with Multiple Big Islands | 0 | - | 4.92 | 122,003 |
| Most Desired Destinations for Potential Migrants | 0 | - | 4.82 | 49,359 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 155,649 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 59,541 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 86,970 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.94 | 149,374 |
| Countries with Multiple Populous Islands | 0 | - | 4.91 | 80,591 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 43,450 |
| Countries by Sports League Revenue | 0 | - | 4.93 | 67,767 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 104,932 |
| Countries Furthest from the United States | 0 | - | 4.95 | 86,035 |
| Countries with the Highest HDI | 0 | - | 4.95 | 134,284 |
| Straight Shot to the Arctic Circle | 0 | - | 4.89 | 72,228 |
| Most Dispersed Island Nations | 0 | - | 4.96 | 68,730 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 98,461 |
| World Map Quiz | 0 | - | 4.88 | 57,849 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 135,579 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 86,865 |
| Southernmost Countries of the World | 0 | - | 4.99 | 218,832 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 98,875 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 116,730 |
| Countries With the Most Languages | 0 | - | 4.89 | 189,562 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.93 | 92,615 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.89 | 88,696 |
| Countries with the Most Prisoners | 0 | - | 4.93 | 93,708 |
| Countries with the Most Domestic Camels | 0 | - | 4.93 | 58,445 |
| Tallest Countries North to South | 0 | - | 4.85 | 115,720 |
| Widest Countries East to West | 0 | - | 4.92 | 124,864 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 70,218 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 180,402 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 95,511 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 90,387 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 125,562 |
| Countries with the Most Desert | 0 | - | 4.93 | 123,472 |
| Countries by Contribution to UN Budget | 0 | - | 4.85 | 68,070 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 33,598 |
| Countries with Double Letters | 0 | - | 4.97 | 82,954 |
| Countries that End in N | 0 | - | 4.94 | 146,757 |
| Countries with Five Letters Quiz | 0 | - | 4.96 | 246,800 |
| Countries with Six Letters Quiz | 0 | - | 4.94 | 201,129 |
| Countries with W | 0 | - | 4.97 | 150,247 |
| Countries with Z | 0 | - | 4.98 | 276,706 |
| Countries with Letters Missing | 0 | - | 4.97 | 176,952 |
| Countries That End in U | 0 | - | 4.95 | 114,683 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 101,092 |
| Countries that End in O | 0 | - | 4.92 | 154,693 |
| Countries that End in R | 0 | - | 4.84 | 100,157 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 152,103 |
| Countries Ending in "IA" | 0 | - | 4.99 | 198,581 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 163,584 |
| Countries by Last Two Letters | 0 | - | 4.87 | 122,051 |
| Countries by First and Last Letter #2 | 0 | - | 4.95 | 135,836 |
| Countries That End in Y | 0 | - | 4.91 | 182,296 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 189,556 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.91 | 128,076 |
| Countries that End in I | 0 | - | 4.92 | 117,571 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 158,665 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 92,353 |
| Countries That End in NIA | 0 | - | 4.92 | 105,266 |
| Countries That End in BIA | 0 | - | 4.92 | 142,929 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 161,482 |
| Countries Whose Names Start with Saint | 0 | - | 4.86 | 114,965 |
| Countries That End in RIA | 0 | - | 4.89 | 105,629 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 106,110 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 215,785 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 127,524 |
| Divided Country Name Puzzle #3 | 0 | - | 4.91 | 119,408 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 4.99 | 85,250 |
| Add A Letter - Make a Country | 0 | - | 4.81 | 71,363 |
| Countries With One Word and Three A's | 0 | - | 4.94 | 48,797 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 98,318 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.97 | 120,219 |
| Countries that are Free from U.S.A. | 0 | - | 4.87 | 46,422 |
| Countries with the Word "And" | 0 | - | 4.98 | 90,096 |
| Countries Containing Two or More Words | 0 | - | 4.96 | 48,028 |
| Countries that End in L | 0 | - | 4.94 | 151,979 |
| "Land" Countries | 0 | - | 4.98 | 300,006 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 197,837 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 83,994 |
| City to Country Quiz #1 | 0 | - | 4.96 | 150,758 |
| City to Country Quiz #3 | 0 | - | 4.87 | 104,850 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 75,729 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 220,057 |
| Five Poorest Countries by Continent | 0 | - | 4.94 | 192,969 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 122,445 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 155,031 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.93 | 216,634 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.97 | 147,573 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.88 | 68,958 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.83 | 106,069 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 84,925 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 59,889 |
| Biggest Countries by Population | 0 | - | 4.99 | 1,382,983 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 365,107 |
| One Border Countries | 0 | - | 4.98 | 445,530 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,636,309 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.96 | 82,084 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 257,800 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 116,110 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 107,944 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 88,395 |
| Countries by National Anthem | 0 | - | 4.92 | 69,956 |
| NATO Countries Quiz | 0 | - | 4.98 | 258,063 |
| EU Countries Quiz | 0 | - | 4.99 | 254,813 |
| Recently Independent Countries Quiz | 0 | - | 4.98 | 152,379 |
| French-Speaking Countries | 0 | - | 4.85 | 258,235 |
| Natural Features of Countries #1 | 0 | - | 4.85 | 80,840 |
| Countries That Use the Euro | 0 | - | 4.93 | 76,211 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 267,595 |
| Countries with Nuclear Weapons | 0 | - | 4.89 | 249,005 |
| German-Speaking Countries | 0 | - | 4.89 | 121,224 |
| Countries with Wild Tigers | 0 | - | 4.97 | 131,785 |
| Countries with Wild Penguins | 0 | - | 4.93 | 95,776 |
| Solve the Secret Country #1 | 0 | - | 4.94 | 150,070 |
| Top Five Countries by Religion | 0 | - | 4.91 | 157,552 |
| Solve the Secret Country #2 | 0 | - | 4.88 | 104,927 |
| Countries by Hottest Recorded Temperature | 0 | - | 4.92 | 105,088 |
| Olympic Host Countries | 0 | - | 4.98 | 189,915 |
| UNESCO World Heritage Countries | 0 | - | 4.98 | 128,014 |
| Anagram Chain - Countries | 0 | - | 4.99 | 108,325 |
