| Countries of the World Quiz | 0 | - | 5.00 | 40,829,481 |
| Landlocked Countries Quiz | 0 | - | 4.99 | 322,479 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,060,134 |
| Members of the Arab League | 0 | - | 4.85 | 61,404 |
| Sahara Desert Countries | 0 | - | 4.97 | 126,520 |
| Himalayan Countries | 0 | - | 4.94 | 104,407 |
| Andean Countries | 0 | - | 4.91 | 57,861 |
| Countries with the Oldest Median Age | 0 | - | 4.84 | 58,787 |
| Countries with the Youngest Median Age | 0 | - | 4.98 | 49,166 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 102,497 |
| Coffee Producing Countries | 0 | - | 4.81 | 53,945 |
| Countries with Shrinking Populations | 0 | - | 4.93 | 53,191 |
| Danube Countries | 0 | - | 4.97 | 56,574 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 91,605 |
| Countries With an "Ese" Demonym | 0 | - | 4.96 | 64,784 |
| Countries with the Best Passports | 0 | - | 4.87 | 70,988 |
| Countries with the Worst Passports | 0 | - | 4.87 | 49,217 |
| Countries with the Most Immigrants | 0 | - | 4.87 | 108,990 |
| European Landlocked Countries | 0 | - | 4.99 | 115,048 |
| Partially Recognized Countries | 0 | - | 4.98 | 89,203 |
| Countries with the Most Species | 0 | - | 4.99 | 89,230 |
| Countries 197 to 205 | 0 | - | 4.88 | 56,247 |
| Tropic of Cancer Countries | 0 | - | 4.96 | 44,633 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 43,966 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 48,158 |
| Countries that Use the Peso | 0 | - | 4.82 | 46,345 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.88 | 58,634 |
| Countries with a AAA Credit Rating | 0 | - | 4.89 | 49,048 |
| Countries in the Alps | 0 | - | 4.83 | 102,468 |
| Top Five Importing Partners by Country | 0 | - | 4.98 | 85,162 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 86,798 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 71,481 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 78,132 |
| Northernmost Countries by Continent | 0 | - | 4.97 | 93,819 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.91 | 87,428 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 89,498 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 46,065 |
| Biggest Country by Body of Water | 0 | - | 4.96 | 45,252 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 54,549 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.88 | 69,292 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 48,516 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 36,605 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 95,355 |
| Arctic Ocean Countries | 0 | - | 4.93 | 71,853 |
| Countries with the Most Grassland | 0 | - | 4.93 | 69,348 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 97,684 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 61,262 |
| Countries that Host the Most Refugees | 0 | - | 4.93 | 53,298 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 195,488 |
| World Countries - Blind Typing | 0 | - | 5.00 | 72,548 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 42,203 |
| Largest Countries By Category | 0 | - | 4.96 | 144,669 |
| Countries by Countries | 0 | - | 4.96 | 54,523 |
| Country Flags with the Most White | 0 | - | 4.90 | 124,126 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 58,629 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 77,991 |
| Spanish-Speaking Countries | 0 | - | 4.94 | 340,402 |
| Countries with the Most Tourists Quiz | 0 | - | 4.91 | 354,676 |
| Island Countries Quiz | 0 | - | 4.99 | 659,553 |
| Biggest Countries by Area | 0 | - | 5.00 | 931,371 |
| Northernmost Countries | 0 | - | 4.99 | 326,739 |
| Countries of South America | 0 | - | 5.00 | 791,180 |
| Countries of Oceania | 0 | - | 5.00 | 891,061 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,142,431 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,567,820 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 125,512 |
| Countries with Megacities | 0 | - | 4.99 | 196,690 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 171,099 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.97 | 97,687 |
| Countries With More than 200 Million People | 0 | - | 4.93 | 94,999 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 63,648 |
| Top 50 Countries by Population - In Order | 0 | - | 4.97 | 247,332 |
| Countries by Official Language | 0 | - | 4.95 | 157,945 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.92 | 248,521 |
| Countries in their Native Language | 0 | - | 4.98 | 177,861 |
| Independence from Whom | 0 | - | 4.99 | 185,191 |
| Subdivisions by Country | 0 | - | 4.82 | 46,384 |
| Who Controlled These Colonies? | 0 | - | 4.89 | 113,186 |
| Megadiverse Countries | 0 | - | 4.96 | 125,207 |
| Countries With the Most English Speakers | 0 | - | 4.87 | 90,938 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 106,575 |
| Most Desired Destinations for Potential Migrants | 0 | - | 4.83 | 47,324 |
| 15 Biggest Island Countries | 0 | - | 4.99 | 131,396 |
| Most Recently-Settled Countries | 0 | - | 4.92 | 49,061 |
| Countries of the World in 1938 Quiz | 0 | - | 4.96 | 77,663 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.95 | 144,997 |
| Countries with Multiple Populous Islands | 0 | - | 4.91 | 76,962 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 41,289 |
| Countries by Sports League Revenue | 0 | - | 4.88 | 43,635 |
| Landmarks of Countries #1 | 0 | - | 4.89 | 101,505 |
| Countries Furthest from the United States | 0 | - | 4.94 | 71,906 |
| Countries with the Highest HDI | 0 | - | 4.95 | 130,915 |
| Straight Shot to the Arctic Circle | 0 | - | 4.92 | 68,449 |
| Most Dispersed Island Nations | 0 | - | 4.96 | 65,172 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 81,798 |
| World Map Quiz | 0 | - | 4.90 | 49,117 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 112,847 |
| Smallest Countries with at Least One Border | 0 | - | 4.90 | 81,333 |
| Southernmost Countries of the World | 0 | - | 4.99 | 206,430 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 90,739 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.90 | 107,825 |
| Countries With the Most Languages | 0 | - | 4.90 | 173,179 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.93 | 87,193 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.86 | 71,450 |
| Countries with the Most Prisoners | 0 | - | 4.93 | 86,129 |
| Countries with the Most Domestic Camels | 0 | - | 4.92 | 53,802 |
| Tallest Countries North to South | 0 | - | 4.84 | 110,313 |
| Widest Countries East to West | 0 | - | 4.93 | 119,236 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 68,790 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 158,855 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 92,587 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.96 | 85,296 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 118,705 |
| Countries with the Most Desert | 0 | - | 4.92 | 105,043 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 66,412 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 32,019 |
| Countries with Double Letters | 0 | - | 4.96 | 68,033 |
| Countries that End in N | 0 | - | 4.93 | 132,386 |
| Countries with Five Letters Quiz | 0 | - | 4.96 | 229,360 |
| Countries with Six Letters Quiz | 0 | - | 4.95 | 186,747 |
| Countries with W | 0 | - | 4.97 | 122,503 |
| Countries with Z | 0 | - | 4.98 | 244,086 |
| Countries with Letters Missing | 0 | - | 4.97 | 155,362 |
| Countries That End in U | 0 | - | 4.95 | 107,420 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 89,188 |
| Countries that End in O | 0 | - | 4.92 | 146,812 |
| Countries that End in R | 0 | - | 4.86 | 96,389 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 147,165 |
| Countries Ending in "IA" | 0 | - | 4.99 | 171,050 |
| Countries by First and Last Letter #1 | 0 | - | 4.98 | 155,600 |
| Countries by Last Two Letters | 0 | - | 4.91 | 116,104 |
| Countries by First and Last Letter #2 | 0 | - | 4.94 | 129,152 |
| Countries That End in Y | 0 | - | 4.90 | 161,572 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 160,806 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.91 | 120,595 |
| Countries that End in I | 0 | - | 4.92 | 114,431 |
| Countries Based on First Two Letters #2 | 0 | - | 4.98 | 149,356 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 88,180 |
| Countries That End in NIA | 0 | - | 4.93 | 100,738 |
| Countries That End in BIA | 0 | - | 4.91 | 125,944 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.93 | 153,088 |
| Countries Whose Names Start with Saint | 0 | - | 4.88 | 109,609 |
| Countries That End in RIA | 0 | - | 4.90 | 100,857 |
| Most Common Words in Official Country Names | 0 | - | 4.85 | 100,317 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 200,376 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 119,501 |
| Divided Country Name Puzzle #3 | 0 | - | 4.93 | 110,382 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 4.99 | 77,189 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 92,117 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 96,587 |
| Countries that are Free from U.S.A. | 0 | - | 4.90 | 42,738 |
| Countries Containing Two or More Words | 0 | - | 4.96 | 40,551 |
| Countries that End in L | 0 | - | 4.95 | 134,159 |
| "Land" Countries | 0 | - | 4.98 | 288,960 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 188,631 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.97 | 65,162 |
| City to Country Quiz #1 | 0 | - | 4.94 | 134,185 |
| City to Country Quiz #3 | 0 | - | 4.87 | 100,101 |
| 45 European Countries, 45 Cities | 0 | - | 4.94 | 71,496 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 207,587 |
| Five Poorest Countries by Continent | 0 | - | 4.95 | 165,723 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 116,325 |
| Five Smallest Countries by Continent | 0 | - | 4.97 | 132,570 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.92 | 193,635 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 140,741 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 65,816 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.83 | 91,997 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 82,223 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.93 | 55,951 |
| Biggest Countries by Population | 0 | - | 4.99 | 1,309,561 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 348,962 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,058,126 |
| One Border Countries | 0 | - | 4.98 | 409,197 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,386,955 |
| Countries With One Word and Three A's | 0 | - | 4.85 | 30,709 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.94 | 65,975 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 244,747 |
| Most Populous Countries with Exceptions | 0 | - | 4.97 | 108,863 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 89,854 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.93 | 68,887 |
| Countries by National Anthem | 0 | - | 4.95 | 61,805 |
| NATO Countries Quiz | 0 | - | 4.98 | 225,077 |
| EU Countries Quiz | 0 | - | 4.99 | 227,541 |
| Recently Independent Countries Quiz | 0 | - | 4.98 | 144,343 |
| Natural Features of Countries #1 | 0 | - | 4.85 | 77,555 |
| Countries That Use the Euro | 0 | - | 4.92 | 62,613 |
| Countries with the Most Military Troops | 0 | - | 4.94 | 225,597 |
| Countries with Nuclear Weapons | 0 | - | 4.89 | 217,164 |
| German-Speaking Countries | 0 | - | 4.88 | 117,437 |
| Countries with Wild Tigers | 0 | - | 4.95 | 110,781 |
| Countries with Wild Penguins | 0 | - | 4.93 | 90,099 |
| Solve the Secret Country #1 | 0 | - | 4.96 | 129,618 |
| Top Five Countries by Religion | 0 | - | 4.90 | 141,689 |
| Solve the Secret Country #2 | 0 | - | 4.91 | 87,826 |
| Countries by Hottest Recorded Temperature | 0 | - | 4.91 | 81,507 |
| Olympic Host Countries | 0 | - | 4.98 | 161,608 |
| UNESCO World Heritage Countries | 0 | - | 4.98 | 98,701 |
| Anagram Chain - Countries | 0 | - | 4.98 | 96,474 |
| 10 Easternmost Countries in Europe | 0 | - | 4.85 | 91,913 |
| Countries with the Most Elite Universities | 0 | - | 4.95 | 123,891 |
