| Landlocked Countries Quiz | 0 | - | 4.99 | 335,349 |
| Countries of the World Quiz | 0 | - | 5.00 | 41,841,525 |
| Members of the Arab League | 0 | - | 4.86 | 66,637 |
| Sahara Desert Countries | 0 | - | 4.97 | 130,785 |
| Himalayan Countries | 0 | - | 4.94 | 108,724 |
| Andean Countries | 0 | - | 4.91 | 60,397 |
| Countries with the Oldest Median Age | 0 | - | 4.82 | 61,584 |
| Countries with the Youngest Median Age | 0 | - | 4.98 | 50,987 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 104,625 |
| Coffee Producing Countries | 0 | - | 4.82 | 54,928 |
| Countries with Shrinking Populations | 0 | - | 4.93 | 54,370 |
| Danube Countries | 0 | - | 4.96 | 57,292 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 92,289 |
| Countries With an "Ese" Demonym | 0 | - | 4.96 | 65,345 |
| Countries with the Best Passports | 0 | - | 4.86 | 72,846 |
| Countries with the Worst Passports | 0 | - | 4.89 | 50,519 |
| Countries with the Most Immigrants | 0 | - | 4.87 | 111,184 |
| European Landlocked Countries | 0 | - | 4.99 | 137,295 |
| Partially Recognized Countries | 0 | - | 4.98 | 90,941 |
| Countries with the Most Species | 0 | - | 4.99 | 90,094 |
| Countries 197 to 205 | 0 | - | 4.87 | 57,465 |
| Tropic of Cancer Countries | 0 | - | 4.96 | 45,064 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 44,356 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 49,151 |
| Countries that Use the Peso | 0 | - | 4.82 | 46,936 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.88 | 59,170 |
| Countries with a AAA Credit Rating | 0 | - | 4.87 | 50,007 |
| Countries in the Alps | 0 | - | 4.84 | 103,992 |
| Top Five Importing Partners by Country | 0 | - | 4.98 | 86,565 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 89,799 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 72,375 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 79,481 |
| Northernmost Countries by Continent | 0 | - | 4.97 | 95,001 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.91 | 88,432 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 90,653 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 46,836 |
| Biggest Country by Body of Water | 0 | - | 4.96 | 45,752 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 55,494 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.88 | 70,253 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 49,081 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 37,068 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 96,673 |
| Arctic Ocean Countries | 0 | - | 4.93 | 72,759 |
| Countries with the Most Grassland | 0 | - | 4.94 | 70,330 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 100,841 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 62,030 |
| Countries that Host the Most Refugees | 0 | - | 4.94 | 54,126 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 203,298 |
| World Countries - Blind Typing | 0 | - | 5.00 | 75,710 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 42,898 |
| Largest Countries By Category | 0 | - | 4.97 | 146,584 |
| Countries by Countries | 0 | - | 4.95 | 55,709 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,182,349 |
| Country Flags with the Most White | 0 | - | 4.91 | 126,699 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 59,265 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 45,182 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 79,776 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,235,807 |
| Spanish-Speaking Countries | 0 | - | 4.94 | 345,531 |
| Countries with the Most Tourists Quiz | 0 | - | 4.91 | 363,336 |
| Island Countries Quiz | 0 | - | 4.99 | 669,435 |
| Biggest Countries by Area | 0 | - | 5.00 | 948,957 |
| Northernmost Countries | 0 | - | 4.99 | 331,213 |
| Countries of South America | 0 | - | 5.00 | 811,615 |
| Countries of Oceania | 0 | - | 5.00 | 915,571 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,615,063 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 129,320 |
| Countries with Megacities | 0 | - | 4.99 | 202,214 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 175,684 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.97 | 100,124 |
| Countries With More than 200 Million People | 0 | - | 4.94 | 98,478 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.97 | 66,071 |
| Top 50 Countries by Population - In Order | 0 | - | 4.97 | 253,540 |
| Countries by Official Language | 0 | - | 4.96 | 175,455 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.92 | 253,889 |
| Countries in their Native Language | 0 | - | 4.98 | 180,815 |
| Independence from Whom | 0 | - | 4.99 | 189,691 |
| Subdivisions by Country | 0 | - | 4.85 | 46,944 |
| Who Controlled These Colonies? | 0 | - | 4.89 | 115,861 |
| Megadiverse Countries | 0 | - | 4.96 | 126,896 |
| Countries With the Most English Speakers | 0 | - | 4.87 | 94,120 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 107,679 |
| Most Desired Destinations for Potential Migrants | 0 | - | 4.82 | 47,866 |
| 15 Biggest Island Countries | 0 | - | 4.99 | 133,492 |
| Most Recently-Settled Countries | 0 | - | 4.92 | 49,968 |
| Countries of the World in 1938 Quiz | 0 | - | 4.96 | 79,801 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.95 | 146,104 |
| Countries with Multiple Populous Islands | 0 | - | 4.91 | 77,780 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 41,885 |
| Countries by Sports League Revenue | 0 | - | 4.89 | 45,223 |
| Landmarks of Countries #1 | 0 | - | 4.89 | 102,333 |
| Countries Furthest from the United States | 0 | - | 4.94 | 73,022 |
| Countries with the Highest HDI | 0 | - | 4.95 | 131,567 |
| Straight Shot to the Arctic Circle | 0 | - | 4.92 | 69,460 |
| Most Dispersed Island Nations | 0 | - | 4.96 | 66,092 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 86,954 |
| World Map Quiz | 0 | - | 4.90 | 51,649 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 119,016 |
| Smallest Countries with at Least One Border | 0 | - | 4.90 | 82,839 |
| Southernmost Countries of the World | 0 | - | 4.99 | 209,990 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 92,960 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 110,339 |
| Countries With the Most Languages | 0 | - | 4.90 | 178,101 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.93 | 88,785 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.86 | 73,198 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 88,427 |
| Countries with the Most Domestic Camels | 0 | - | 4.92 | 55,195 |
| Tallest Countries North to South | 0 | - | 4.85 | 111,693 |
| Widest Countries East to West | 0 | - | 4.93 | 120,661 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 69,147 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 160,707 |
| Countries with the Longest Perimeter | 0 | - | 4.81 | 72,910 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 93,472 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 86,952 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 120,762 |
| Countries with the Most Desert | 0 | - | 4.92 | 106,602 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 66,824 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 32,445 |
| Countries with Double Letters | 0 | - | 4.96 | 72,516 |
| Countries that End in N | 0 | - | 4.94 | 136,754 |
| Countries with Five Letters Quiz | 0 | - | 4.97 | 234,548 |
| Countries with Six Letters Quiz | 0 | - | 4.95 | 191,111 |
| Countries with W | 0 | - | 4.96 | 126,214 |
| Countries with Z | 0 | - | 4.98 | 265,236 |
| Countries with Letters Missing | 0 | - | 4.97 | 170,074 |
| Countries That End in U | 0 | - | 4.95 | 109,788 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 92,872 |
| Countries that End in O | 0 | - | 4.92 | 148,921 |
| Countries that End in R | 0 | - | 4.85 | 97,496 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 148,440 |
| Countries Ending in "IA" | 0 | - | 4.99 | 174,519 |
| Countries by First and Last Letter #1 | 0 | - | 4.98 | 157,914 |
| Countries by Last Two Letters | 0 | - | 4.90 | 117,848 |
| Countries by First and Last Letter #2 | 0 | - | 4.95 | 130,782 |
| Countries That End in Y | 0 | - | 4.92 | 177,420 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 163,187 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.91 | 122,742 |
| Countries that End in I | 0 | - | 4.92 | 115,309 |
| Countries Based on First Two Letters #2 | 0 | - | 4.98 | 151,809 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 89,489 |
| Countries That End in NIA | 0 | - | 4.92 | 101,927 |
| Countries That End in BIA | 0 | - | 4.91 | 127,453 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 155,324 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 111,091 |
| Countries That End in RIA | 0 | - | 4.90 | 102,004 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 101,906 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 205,120 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 121,859 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 113,013 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 4.99 | 79,514 |
| Countries With One Word and Three A's | 0 | - | 4.87 | 40,766 |
| Countries with a Unique Last Letter | 0 | - | 4.91 | 93,952 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 98,298 |
| Countries that are Free from U.S.A. | 0 | - | 4.90 | 43,789 |
| Countries with the Word "And" | 0 | - | 4.98 | 85,217 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 42,660 |
| Countries that End in L | 0 | - | 4.95 | 135,995 |
| "Land" Countries | 0 | - | 4.98 | 292,566 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 191,436 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 82,942 |
| City to Country Quiz #1 | 0 | - | 4.95 | 135,467 |
| City to Country Quiz #3 | 0 | - | 4.87 | 101,143 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 72,722 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 211,325 |
| Five Poorest Countries by Continent | 0 | - | 4.94 | 171,189 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 117,942 |
| Five Smallest Countries by Continent | 0 | - | 4.97 | 135,052 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.93 | 196,617 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 142,691 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 66,671 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.84 | 103,399 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 83,343 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.93 | 57,460 |
| Biggest Countries by Population | 0 | - | 4.99 | 1,330,497 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 353,727 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,122,126 |
| One Border Countries | 0 | - | 4.98 | 416,237 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,476,307 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.94 | 67,586 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 248,621 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 110,719 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 104,350 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.94 | 72,419 |
| Countries by National Anthem | 0 | - | 4.95 | 68,746 |
| NATO Countries Quiz | 0 | - | 4.98 | 243,131 |
| EU Countries Quiz | 0 | - | 4.99 | 231,757 |
| Recently Independent Countries Quiz | 0 | - | 4.98 | 146,635 |
| French-Speaking Countries | 0 | - | 4.81 | 224,458 |
| Natural Features of Countries #1 | 0 | - | 4.85 | 78,582 |
| Countries That Use the Euro | 0 | - | 4.93 | 66,497 |
| Countries with the Most Military Troops | 0 | - | 4.94 | 229,682 |
| Countries with Nuclear Weapons | 0 | - | 4.89 | 235,278 |
| German-Speaking Countries | 0 | - | 4.88 | 118,368 |
| Countries with Wild Tigers | 0 | - | 4.95 | 112,506 |
| Countries with Wild Penguins | 0 | - | 4.93 | 91,421 |
| Solve the Secret Country #1 | 0 | - | 4.95 | 135,425 |
| Top Five Countries by Religion | 0 | - | 4.91 | 146,683 |
| Solve the Secret Country #2 | 0 | - | 4.90 | 92,718 |
| Countries by Hottest Recorded Temperature | 0 | - | 4.91 | 82,873 |
| Olympic Host Countries | 0 | - | 4.98 | 164,572 |
