| Countries of Europe Quiz | 0 | - | 5.00 | 3,464,068 |
| Countries of South America | 0 | - | 5.00 | 860,439 |
| Countries of Oceania | 0 | - | 5.00 | 972,986 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,726,096 |
| Landlocked Countries Quiz | 0 | - | 4.99 | 381,229 |
| Countries of the World Quiz | 0 | - | 5.00 | 44,213,361 |
| Sahara Desert Countries | 0 | - | 4.97 | 144,922 |
| Himalayan Countries | 0 | - | 4.95 | 121,622 |
| Andean Countries | 0 | - | 4.92 | 68,335 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 56,412 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 112,579 |
| Coffee Producing Countries | 0 | - | 4.83 | 59,605 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 59,043 |
| Danube Countries | 0 | - | 4.97 | 60,698 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 96,638 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 81,737 |
| Countries with the Best Passports | 0 | - | 4.81 | 80,119 |
| Countries with the Worst Passports | 0 | - | 4.92 | 64,192 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 137,609 |
| European Landlocked Countries | 0 | - | 4.99 | 140,854 |
| Partially Recognized Countries | 0 | - | 4.98 | 97,823 |
| Countries with the Most Species | 0 | - | 4.99 | 92,248 |
| Countries 197 to 205 | 0 | - | 4.87 | 63,240 |
| Tropic of Cancer Countries | 0 | - | 4.95 | 46,627 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 45,724 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 52,445 |
| Countries that Use the Peso | 0 | - | 4.88 | 56,174 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.87 | 69,842 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 53,510 |
| Countries in the Alps | 0 | - | 4.86 | 110,200 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 90,542 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 97,459 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 75,272 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 83,554 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 110,430 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.90 | 91,808 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 94,832 |
| Five Biggest Countries by Longitude | 0 | - | 4.90 | 49,718 |
| Biggest Country by Body of Water | 0 | - | 4.95 | 47,881 |
| Countries with the Most Container Port Traffic | 0 | - | 4.91 | 58,653 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 72,629 |
| Bridge and Tunnel Borders | 0 | - | 4.95 | 51,166 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.89 | 39,026 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 100,026 |
| Arctic Ocean Countries | 0 | - | 4.94 | 75,702 |
| Countries with the Most Grassland | 0 | - | 4.93 | 73,376 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 108,634 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 64,698 |
| Countries that Host the Most Refugees | 0 | - | 4.94 | 56,606 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 221,307 |
| World Countries - Blind Typing | 0 | - | 5.00 | 94,487 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 44,994 |
| Largest Countries By Category | 0 | - | 4.97 | 151,103 |
| Countries by Countries | 0 | - | 4.96 | 58,311 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,398,083 |
| Country Flags with the Most White | 0 | - | 4.87 | 131,872 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 60,598 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 83,744 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 359,653 |
| Countries with the Most Tourists Quiz | 0 | - | 4.91 | 381,639 |
| Island Countries Quiz | 0 | - | 4.99 | 689,955 |
| Biggest Countries by Area | 0 | - | 5.00 | 988,155 |
| Northernmost Countries | 0 | - | 4.99 | 342,304 |
| Countries of North America Quiz | 0 | - | 5.00 | 952,116 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,252,854 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 158,367 |
| Countries with Megacities | 0 | - | 4.99 | 217,476 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 186,392 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.97 | 106,075 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 126,378 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.97 | 72,992 |
| Top 50 Countries by Population - In Order | 0 | - | 4.97 | 269,355 |
| Countries by Official Language | 0 | - | 4.95 | 183,772 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 281,621 |
| Countries in their Native Language | 0 | - | 4.98 | 188,575 |
| Independence from Whom | 0 | - | 4.99 | 199,549 |
| Subdivisions by Country | 0 | - | 4.86 | 48,480 |
| Who Controlled These Colonies? | 0 | - | 4.90 | 123,524 |
| Megadiverse Countries | 0 | - | 4.96 | 130,370 |
| Countries With the Most English Speakers | 0 | - | 4.89 | 121,851 |
| Countries with Multiple Big Islands | 0 | - | 4.92 | 120,724 |
| Most Desired Destinations for Potential Migrants | 0 | - | 4.82 | 49,287 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 155,288 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 59,404 |
| Countries of the World in 1938 Quiz | 0 | - | 4.96 | 86,288 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.94 | 148,918 |
| Countries with Multiple Populous Islands | 0 | - | 4.91 | 80,337 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 43,386 |
| Countries by Sports League Revenue | 0 | - | 4.93 | 67,011 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 104,804 |
| Countries Furthest from the United States | 0 | - | 4.95 | 85,883 |
| Countries with the Highest HDI | 0 | - | 4.95 | 134,126 |
| Straight Shot to the Arctic Circle | 0 | - | 4.89 | 72,089 |
| Most Dispersed Island Nations | 0 | - | 4.96 | 68,545 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 97,862 |
| World Map Quiz | 0 | - | 4.88 | 57,485 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 134,470 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 86,606 |
| Southernmost Countries of the World | 0 | - | 4.99 | 218,362 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 98,597 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 116,461 |
| Countries With the Most Languages | 0 | - | 4.89 | 188,935 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.93 | 92,454 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.89 | 88,465 |
| Countries with the Most Prisoners | 0 | - | 4.93 | 93,483 |
| Countries with the Most Domestic Camels | 0 | - | 4.93 | 58,279 |
| Tallest Countries North to South | 0 | - | 4.85 | 115,498 |
| Widest Countries East to West | 0 | - | 4.92 | 124,627 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 70,179 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 176,322 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 95,408 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 90,192 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 125,291 |
| Countries with the Most Desert | 0 | - | 4.93 | 123,230 |
| Countries by Contribution to UN Budget | 0 | - | 4.85 | 68,009 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 33,527 |
| Countries with Double Letters | 0 | - | 4.96 | 81,686 |
| Countries that End in N | 0 | - | 4.93 | 145,598 |
| Countries with Five Letters Quiz | 0 | - | 4.97 | 245,497 |
| Countries with Six Letters Quiz | 0 | - | 4.94 | 200,107 |
| Countries with W | 0 | - | 4.97 | 132,978 |
| Countries with Z | 0 | - | 4.98 | 275,397 |
| Countries with Letters Missing | 0 | - | 4.97 | 176,189 |
| Countries That End in U | 0 | - | 4.95 | 113,964 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 99,968 |
| Countries that End in O | 0 | - | 4.92 | 154,167 |
| Countries that End in R | 0 | - | 4.84 | 99,813 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 151,822 |
| Countries Ending in "IA" | 0 | - | 4.99 | 197,897 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 163,172 |
| Countries by Last Two Letters | 0 | - | 4.87 | 121,751 |
| Countries by First and Last Letter #2 | 0 | - | 4.95 | 135,504 |
| Countries That End in Y | 0 | - | 4.91 | 182,038 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 189,115 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.91 | 127,358 |
| Countries that End in I | 0 | - | 4.92 | 117,369 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 158,234 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 92,150 |
| Countries That End in NIA | 0 | - | 4.92 | 105,056 |
| Countries That End in BIA | 0 | - | 4.91 | 142,651 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 161,168 |
| Countries Whose Names Start with Saint | 0 | - | 4.86 | 114,657 |
| Countries That End in RIA | 0 | - | 4.90 | 105,401 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 105,807 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 215,085 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 127,118 |
| Divided Country Name Puzzle #3 | 0 | - | 4.91 | 118,949 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 4.99 | 84,775 |
| Add A Letter - Make a Country | 0 | - | 4.81 | 71,112 |
| Countries With One Word and Three A's | 0 | - | 4.94 | 48,518 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 97,606 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.97 | 119,888 |
| Countries that are Free from U.S.A. | 0 | - | 4.87 | 46,197 |
| Countries with the Word "And" | 0 | - | 4.98 | 89,735 |
| Countries Containing Two or More Words | 0 | - | 4.96 | 47,623 |
| Countries that End in L | 0 | - | 4.94 | 151,696 |
| "Land" Countries | 0 | - | 4.98 | 299,503 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 197,413 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 83,905 |
| City to Country Quiz #1 | 0 | - | 4.96 | 150,184 |
| City to Country Quiz #3 | 0 | - | 4.87 | 104,676 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 75,542 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 219,052 |
| Five Poorest Countries by Continent | 0 | - | 4.94 | 192,279 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 122,016 |
| Five Smallest Countries by Continent | 0 | - | 4.97 | 140,779 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.93 | 215,803 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.97 | 147,100 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.88 | 68,700 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.82 | 105,942 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 84,830 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 59,729 |
| Biggest Countries by Population | 0 | - | 4.99 | 1,379,790 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 364,406 |
| One Border Countries | 0 | - | 4.98 | 444,427 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,626,490 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.96 | 81,750 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 257,108 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 115,771 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 107,566 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 87,992 |
| Countries by National Anthem | 0 | - | 4.92 | 69,855 |
| NATO Countries Quiz | 0 | - | 4.98 | 257,371 |
| EU Countries Quiz | 0 | - | 4.99 | 254,174 |
| Recently Independent Countries Quiz | 0 | - | 4.98 | 152,097 |
| French-Speaking Countries | 0 | - | 4.85 | 257,200 |
| Natural Features of Countries #1 | 0 | - | 4.85 | 80,668 |
| Countries That Use the Euro | 0 | - | 4.92 | 75,615 |
| Countries with the Most Military Troops | 0 | - | 4.96 | 266,558 |
| Countries with Nuclear Weapons | 0 | - | 4.89 | 248,208 |
| German-Speaking Countries | 0 | - | 4.89 | 121,012 |
| Countries with Wild Tigers | 0 | - | 4.97 | 131,473 |
| Countries with Wild Penguins | 0 | - | 4.93 | 95,573 |
| Solve the Secret Country #1 | 0 | - | 4.94 | 149,063 |
| Top Five Countries by Religion | 0 | - | 4.91 | 156,975 |
| Solve the Secret Country #2 | 0 | - | 4.88 | 104,088 |
| Countries by Hottest Recorded Temperature | 0 | - | 4.93 | 104,782 |
| Olympic Host Countries | 0 | - | 4.98 | 189,393 |
| UNESCO World Heritage Countries | 0 | - | 4.98 | 127,573 |
| Anagram Chain - Countries | 0 | - | 4.99 | 107,816 |
