| Countries of Europe Quiz | 0 | - | 5.00 | 3,529,762 |
| Countries of South America | 0 | - | 5.00 | 875,301 |
| Countries of Oceania | 0 | - | 5.00 | 991,206 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,757,765 |
| Landlocked Countries Quiz | 0 | - | 4.99 | 390,628 |
| Countries of the World Quiz | 0 | - | 5.00 | 44,931,110 |
| Sahara Desert Countries | 0 | - | 4.97 | 149,527 |
| Himalayan Countries | 0 | - | 4.94 | 125,648 |
| Andean Countries | 0 | - | 4.93 | 70,741 |
| Countries with the Youngest Median Age | 0 | - | 4.98 | 58,244 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 115,796 |
| Coffee Producing Countries | 0 | - | 4.83 | 61,607 |
| Countries with Shrinking Populations | 0 | - | 4.93 | 60,704 |
| Danube Countries | 0 | - | 4.97 | 61,772 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 98,156 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 82,778 |
| Countries with the Worst Passports | 0 | - | 4.92 | 75,577 |
| Countries with the Most Immigrants | 0 | - | 4.89 | 141,201 |
| European Landlocked Countries | 0 | - | 4.99 | 142,168 |
| Partially Recognized Countries | 0 | - | 4.98 | 99,996 |
| Countries with the Most Species | 0 | - | 4.99 | 93,205 |
| Countries 197 to 205 | 0 | - | 4.88 | 64,928 |
| Tropic of Cancer Countries | 0 | - | 4.95 | 47,114 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 46,195 |
| Countries that Use the Peso | 0 | - | 4.89 | 57,082 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.88 | 70,607 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 54,527 |
| Countries in the Alps | 0 | - | 4.86 | 112,105 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 91,667 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 99,628 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 76,095 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 87,971 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 111,784 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.90 | 92,693 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 96,226 |
| Five Biggest Countries by Longitude | 0 | - | 4.90 | 50,551 |
| Biggest Country by Body of Water | 0 | - | 4.95 | 48,525 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 59,581 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 51,762 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 39,565 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 100,876 |
| Arctic Ocean Countries | 0 | - | 4.94 | 76,537 |
| Countries with the Most Grassland | 0 | - | 4.93 | 74,375 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 111,112 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 65,509 |
| Countries that Host the Most Refugees | 0 | - | 4.94 | 57,415 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.94 | 40,699 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 226,635 |
| World Countries - Blind Typing | 0 | - | 5.00 | 97,789 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 45,751 |
| Largest Countries By Category | 0 | - | 4.97 | 152,605 |
| Countries by Countries | 0 | - | 4.96 | 59,273 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,453,766 |
| Country Flags with the Most White | 0 | - | 4.85 | 133,348 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 60,974 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 84,900 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 363,141 |
| Countries with the Most Tourists Quiz | 0 | - | 4.91 | 386,921 |
| Island Countries Quiz | 0 | - | 4.99 | 695,602 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,006,772 |
| Northernmost Countries | 0 | - | 4.99 | 345,140 |
| Countries of North America Quiz | 0 | - | 5.00 | 967,863 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,287,259 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 162,729 |
| Countries with Megacities | 0 | - | 4.99 | 222,337 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 189,593 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.97 | 107,694 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 128,919 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 75,101 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 302,153 |
| Countries by Official Language | 0 | - | 4.95 | 186,148 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.90 | 284,773 |
| Countries in their Native Language | 0 | - | 4.99 | 190,486 |
| Independence from Whom | 0 | - | 4.99 | 202,627 |
| Subdivisions by Country | 0 | - | 4.85 | 48,967 |
| Who Controlled These Colonies? | 0 | - | 4.90 | 125,744 |
| Megadiverse Countries | 0 | - | 4.97 | 131,301 |
| Countries With the Most English Speakers | 0 | - | 4.89 | 124,102 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 53,403 |
| Countries with Multiple Big Islands | 0 | - | 4.92 | 122,726 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 73,533 |
| Most Desired Destinations for Potential Migrants | 0 | - | 4.86 | 49,589 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 156,943 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 60,278 |
| Countries of the World in 1938 Quiz | 0 | - | 4.96 | 88,732 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.94 | 150,182 |
| Countries with Multiple Populous Islands | 0 | - | 4.91 | 81,086 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 43,642 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 69,720 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 105,326 |
| Countries Furthest from the United States | 0 | - | 4.93 | 86,519 |
| Countries with the Highest HDI | 0 | - | 4.95 | 134,996 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 72,720 |
| Most Dispersed Island Nations | 0 | - | 4.96 | 69,210 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 100,740 |
| World Map Quiz | 0 | - | 4.87 | 59,146 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 139,366 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 87,824 |
| Southernmost Countries of the World | 0 | - | 4.99 | 220,415 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 100,006 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 117,828 |
| Countries With the Most Languages | 0 | - | 4.89 | 192,032 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.94 | 97,738 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.89 | 89,640 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 94,831 |
| Countries with the Most Domestic Camels | 0 | - | 4.93 | 59,020 |
| Tallest Countries North to South | 0 | - | 4.84 | 116,646 |
| Widest Countries East to West | 0 | - | 4.92 | 125,772 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 70,441 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 181,605 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 95,998 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.96 | 91,179 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 126,305 |
| Countries with the Most Desert | 0 | - | 4.93 | 124,147 |
| Countries by Contribution to UN Budget | 0 | - | 4.85 | 68,296 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 33,833 |
| Countries with Double Letters | 0 | - | 4.97 | 85,996 |
| Countries that End in N | 0 | - | 4.94 | 149,490 |
| Countries with Five Letters Quiz | 0 | - | 4.96 | 250,011 |
| Countries with Six Letters Quiz | 0 | - | 4.94 | 203,598 |
| Countries with W | 0 | - | 4.97 | 152,641 |
| Countries with Z | 0 | - | 4.98 | 279,594 |
| Countries with Letters Missing | 0 | - | 4.97 | 179,204 |
| Countries That End in U | 0 | - | 4.95 | 116,224 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 103,217 |
| Countries that End in O | 0 | - | 4.92 | 155,817 |
| Countries that End in R | 0 | - | 4.84 | 100,867 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 152,762 |
| Countries Ending in "IA" | 0 | - | 4.99 | 200,590 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 165,457 |
| Countries by Last Two Letters | 0 | - | 4.88 | 131,627 |
| Countries by First and Last Letter #2 | 0 | - | 4.95 | 137,514 |
| Countries That End in Y | 0 | - | 4.91 | 182,940 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 191,746 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 147,870 |
| Countries that End in I | 0 | - | 4.92 | 118,145 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 176,781 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 93,126 |
| Countries That End in NIA | 0 | - | 4.92 | 106,784 |
| Countries That End in BIA | 0 | - | 4.92 | 144,786 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 162,469 |
| Countries Whose Names Start with Saint | 0 | - | 4.86 | 115,827 |
| Countries That End in RIA | 0 | - | 4.92 | 122,774 |
| Most Common Words in Official Country Names | 0 | - | 4.85 | 107,107 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 218,147 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 128,736 |
| Divided Country Name Puzzle #3 | 0 | - | 4.91 | 120,701 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 4.99 | 86,582 |
| Add A Letter - Make a Country | 0 | - | 4.81 | 72,031 |
| Countries With One Word and Three A's | 0 | - | 4.94 | 49,613 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 99,269 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.97 | 121,216 |
| Countries that are Free from U.S.A. | 0 | - | 4.87 | 47,046 |
| Countries with the Word "And" | 0 | - | 4.98 | 91,187 |
| Countries Containing Two or More Words | 0 | - | 4.96 | 49,215 |
| Countries that End in L | 0 | - | 4.94 | 153,046 |
| "Land" Countries | 0 | - | 4.98 | 301,340 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 199,062 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 84,268 |
| City to Country Quiz #1 | 0 | - | 4.96 | 151,461 |
| City to Country Quiz #3 | 0 | - | 4.87 | 105,514 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 76,247 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 222,071 |
| Five Poorest Countries by Continent | 0 | - | 4.94 | 194,419 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 123,305 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 158,367 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.93 | 218,153 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 148,309 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.88 | 69,337 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.83 | 106,376 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.94 | 85,232 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 60,328 |
| Biggest Countries by Population | 0 | - | 4.99 | 1,393,816 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 367,394 |
| One Border Countries | 0 | - | 4.98 | 448,431 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,668,241 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.96 | 82,859 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 259,465 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 117,170 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 108,550 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 89,330 |
| Countries by National Anthem | 0 | - | 4.93 | 70,223 |
| NATO Countries Quiz | 0 | - | 4.98 | 260,483 |
| EU Countries Quiz | 0 | - | 4.99 | 257,136 |
| Recently Independent Countries Quiz | 0 | - | 4.98 | 153,560 |
| French-Speaking Countries | 0 | - | 4.85 | 261,862 |
| Natural Features of Countries #1 | 0 | - | 4.85 | 81,654 |
| Countries That Use the Euro | 0 | - | 4.96 | 82,697 |
| Countries with the Most Military Troops | 0 | - | 4.96 | 271,229 |
| Countries with Nuclear Weapons | 0 | - | 4.89 | 251,800 |
| German-Speaking Countries | 0 | - | 4.89 | 121,727 |
| Countries with Wild Tigers | 0 | - | 4.97 | 132,823 |
| Countries with Wild Penguins | 0 | - | 4.93 | 96,734 |
| Solve the Secret Country #1 | 0 | - | 4.94 | 152,900 |
| Top Five Countries by Religion | 0 | - | 4.91 | 160,471 |
| Solve the Secret Country #2 | 0 | - | 4.88 | 107,326 |
| Countries by Hottest Recorded Temperature | 0 | - | 4.92 | 107,055 |
| Countries by Coldest Recorded Temperature | 0 | - | 4.83 | 105,895 |
| Olympic Host Countries | 0 | - | 4.98 | 191,345 |
| UNESCO World Heritage Countries | 0 | - | 4.98 | 129,411 |
