| Landlocked Countries Quiz | 0 | - | 4.99 | 317,698 |
| Countries of the World Quiz | 0 | - | 5.00 | 40,479,254 |
| Countries on the Equator | 0 | - | 4.82 | 132,651 |
| Members of the Arab League | 0 | - | 4.82 | 59,339 |
| Sahara Desert Countries | 0 | - | 4.97 | 125,183 |
| Himalayan Countries | 0 | - | 4.95 | 102,526 |
| Andean Countries | 0 | - | 4.90 | 56,969 |
| Countries with the Oldest Median Age | 0 | - | 4.85 | 57,817 |
| Countries with the Youngest Median Age | 0 | - | 4.98 | 48,589 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 101,907 |
| Coffee Producing Countries | 0 | - | 4.82 | 53,564 |
| Countries with Shrinking Populations | 0 | - | 4.93 | 52,754 |
| Danube Countries | 0 | - | 4.97 | 56,366 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 91,414 |
| Countries With an "Ese" Demonym | 0 | - | 4.96 | 64,604 |
| Countries with the Best Passports | 0 | - | 4.87 | 70,365 |
| Countries with the Worst Passports | 0 | - | 4.86 | 48,803 |
| Countries with the Most Immigrants | 0 | - | 4.87 | 108,415 |
| European Landlocked Countries | 0 | - | 4.99 | 114,849 |
| Partially Recognized Countries | 0 | - | 4.98 | 88,781 |
| Countries with the Most Species | 0 | - | 4.99 | 89,089 |
| Countries 197 to 205 | 0 | - | 4.88 | 55,852 |
| Tropic of Cancer Countries | 0 | - | 4.96 | 44,446 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 43,824 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 47,769 |
| Countries that Use the Peso | 0 | - | 4.81 | 46,132 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.88 | 58,464 |
| Countries with a AAA Credit Rating | 0 | - | 4.89 | 48,700 |
| Countries in the Alps | 0 | - | 4.82 | 101,857 |
| Top Five Importing Partners by Country | 0 | - | 4.98 | 84,659 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 85,839 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 71,134 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 77,746 |
| Northernmost Countries by Continent | 0 | - | 4.97 | 93,387 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.91 | 87,057 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 89,066 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 45,769 |
| Biggest Country by Body of Water | 0 | - | 4.96 | 45,077 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 54,175 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.88 | 68,921 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 48,338 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 36,421 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 95,000 |
| Arctic Ocean Countries | 0 | - | 4.93 | 71,512 |
| Countries with the Most Grassland | 0 | - | 4.93 | 68,999 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 96,662 |
| Countries with the Most Climate Zones | 0 | - | 4.97 | 60,958 |
| Countries that Host the Most Refugees | 0 | - | 4.93 | 52,975 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 192,861 |
| World Countries - Blind Typing | 0 | - | 5.00 | 71,428 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 41,972 |
| Largest Countries By Category | 0 | - | 4.96 | 143,928 |
| Countries by Countries | 0 | - | 4.96 | 54,104 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 58,387 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 77,370 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,020,627 |
| Spanish-Speaking Countries | 0 | - | 4.94 | 338,645 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 351,899 |
| Island Countries Quiz | 0 | - | 4.99 | 638,884 |
| Biggest Countries by Area | 0 | - | 5.00 | 925,072 |
| Northernmost Countries | 0 | - | 4.99 | 325,369 |
| Countries of South America | 0 | - | 5.00 | 783,970 |
| Countries of Oceania | 0 | - | 5.00 | 882,450 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,110,497 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,552,411 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 124,205 |
| Countries with Megacities | 0 | - | 4.99 | 194,865 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 169,540 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.97 | 96,897 |
| Countries With More than 200 Million People | 0 | - | 4.93 | 93,745 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.97 | 62,740 |
| Top 50 Countries by Population - In Order | 0 | - | 4.97 | 245,180 |
| Countries by Official Language | 0 | - | 4.95 | 153,539 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 246,849 |
| Countries in their Native Language | 0 | - | 4.98 | 177,039 |
| Independence from Whom | 0 | - | 4.99 | 183,663 |
| Subdivisions by Country | 0 | - | 4.82 | 46,186 |
| Who Controlled These Colonies? | 0 | - | 4.89 | 112,152 |
| Megadiverse Countries | 0 | - | 4.96 | 124,780 |
| Countries With the Most English Speakers | 0 | - | 4.87 | 90,016 |
| Countries with Multiple Big Islands | 0 | - | 4.92 | 106,030 |
| Most Desired Destinations for Potential Migrants | 0 | - | 4.82 | 47,135 |
| 15 Biggest Island Countries | 0 | - | 4.99 | 130,124 |
| Most Recently-Settled Countries | 0 | - | 4.92 | 48,720 |
| Countries of the World in 1938 Quiz | 0 | - | 4.96 | 76,806 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.95 | 144,338 |
| Countries with Multiple Populous Islands | 0 | - | 4.91 | 76,514 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 40,990 |
| Countries by Sports League Revenue | 0 | - | 4.87 | 42,924 |
| Landmarks of Countries #1 | 0 | - | 4.89 | 100,834 |
| Countries Furthest from the United States | 0 | - | 4.94 | 71,379 |
| Countries with the Highest HDI | 0 | - | 4.95 | 130,494 |
| Straight Shot to the Arctic Circle | 0 | - | 4.92 | 67,957 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 64,758 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 80,163 |
| Smallest Countries with at Least One Border | 0 | - | 4.91 | 80,787 |
| Southernmost Countries of the World | 0 | - | 4.99 | 205,374 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 90,136 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.90 | 107,086 |
| Countries With the Most Languages | 0 | - | 4.90 | 171,644 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.92 | 86,574 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.85 | 70,896 |
| Countries with the Most Prisoners | 0 | - | 4.93 | 85,489 |
| Countries with the Most Domestic Camels | 0 | - | 4.92 | 53,327 |
| Tallest Countries North to South | 0 | - | 4.84 | 109,863 |
| Widest Countries East to West | 0 | - | 4.93 | 118,742 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 68,684 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 157,927 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 92,111 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.96 | 84,811 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 117,682 |
| Countries with the Most Desert | 0 | - | 4.92 | 104,542 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 66,266 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 31,868 |
| Countries with Double Letters | 0 | - | 4.96 | 67,000 |
| Countries that End in N | 0 | - | 4.94 | 131,444 |
| Countries with Five Letters Quiz | 0 | - | 4.96 | 227,909 |
| Countries with Six Letters Quiz | 0 | - | 4.95 | 185,710 |
| Countries with W | 0 | - | 4.97 | 121,733 |
| Countries with Z | 0 | - | 4.98 | 242,546 |
| Countries with Letters Missing | 0 | - | 4.97 | 154,656 |
| Countries That End in U | 0 | - | 4.94 | 106,994 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 88,375 |
| Countries that End in O | 0 | - | 4.92 | 146,412 |
| Countries that End in R | 0 | - | 4.86 | 96,131 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 146,883 |
| Countries Ending in "IA" | 0 | - | 4.99 | 169,635 |
| Countries by First and Last Letter #1 | 0 | - | 4.98 | 154,914 |
| Countries by Last Two Letters | 0 | - | 4.90 | 115,610 |
| Countries by First and Last Letter #2 | 0 | - | 4.95 | 128,536 |
| Countries That End in Y | 0 | - | 4.90 | 160,822 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 159,694 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.91 | 119,874 |
| Countries that End in I | 0 | - | 4.92 | 114,173 |
| Countries Based on First Two Letters #2 | 0 | - | 4.98 | 148,477 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 87,836 |
| Countries That End in NIA | 0 | - | 4.93 | 100,347 |
| Countries That End in BIA | 0 | - | 4.91 | 125,383 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.93 | 152,409 |
| Countries Whose Names Start with Saint | 0 | - | 4.88 | 109,077 |
| Countries That End in RIA | 0 | - | 4.89 | 100,488 |
| Most Common Words in Official Country Names | 0 | - | 4.85 | 99,786 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 198,790 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 118,688 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 109,489 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 4.99 | 76,418 |
| Countries with a Unique Last Letter | 0 | - | 4.91 | 91,572 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 95,958 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 42,408 |
| Countries Containing Two or More Words | 0 | - | 4.96 | 39,835 |
| Countries that End in L | 0 | - | 4.95 | 133,397 |
| "Land" Countries | 0 | - | 4.98 | 287,964 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 187,819 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.96 | 65,078 |
| City to Country Quiz #1 | 0 | - | 4.94 | 133,777 |
| City to Country Quiz #3 | 0 | - | 4.86 | 99,702 |
| 45 European Countries, 45 Cities | 0 | - | 4.94 | 71,120 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 206,290 |
| Five Poorest Countries by Continent | 0 | - | 4.94 | 157,510 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 115,710 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 131,647 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.92 | 192,060 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 139,996 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 65,444 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.83 | 91,685 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 81,904 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.93 | 55,558 |
| Biggest Countries by Population | 0 | - | 4.99 | 1,302,503 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 347,605 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,036,352 |
| One Border Countries | 0 | - | 4.98 | 406,726 |
| Countries With One Word and Three A's | 0 | - | 4.84 | 30,234 |
| Top-Producing Countries | 0 | - | 4.71 | 99,617 |
| Country Codes Quiz | 0 | - | 4.44 | 76,636 |
| Separatist Movements | 0 | - | 4.45 | 42,402 |
| Prime Meridian Countries | 0 | - | 4.64 | 51,736 |
| Next Country Alphabetically | 0 | - | 4.75 | 68,242 |
| Westernmost Countries | 0 | - | 4.50 | 47,303 |
| Easternmost Countries | 0 | - | 4.76 | 60,219 |
| Countries With the Most ISIS Fighters | 0 | - | 4.56 | 36,853 |
| Top 10 Most Famous Island Countries | 0 | - | 4.66 | 97,768 |
| Indochina Countries | 0 | - | 4.72 | 62,543 |
| Atlantic Ocean Island Countries | 0 | - | 4.55 | 62,865 |
| Countries With the Most Conflict Deaths | 0 | - | 4.63 | 90,449 |
| Highest Foreign Aid Recipients | 0 | - | 4.58 | 42,255 |
| Pacific Ocean Island Countries | 0 | - | 4.49 | 54,996 |
| Countries with the Most Traffic-Related Deaths | 0 | - | 4.76 | 45,748 |
| Countries with the Lowest Obesity Rate | 0 | - | 4.45 | 42,384 |
| Countries that are the Source of Refugees | 0 | - | 4.66 | 56,099 |
| Most Populous Countries By Category | 0 | - | 4.64 | 61,000 |
| Countries with the Most Turkic People | 0 | - | 4.80 | 41,722 |
| Countries Most-Mentioned by the New York Times | 0 | - | 4.66 | 44,612 |
| Flyover Countries | 0 | - | 4.72 | 35,661 |
| Top 50 Countries by Area - In Order | 0 | - | 4.76 | 66,199 |
| Countries with the Most Coral Reefs | 0 | - | 4.65 | 37,309 |
| Countries Without a U.S. Embassy | 0 | - | 4.58 | 41,831 |
| Most Recent Countries to Join the United Nations | 0 | - | 4.53 | 31,715 |
| Countries by Total Area of Bordering Countries | 0 | - | 4.79 | 49,110 |
| Countries with the Most Light Pollution | 0 | - | 4.53 | 44,013 |
| Present-Day Communist Nations | 0 | - | 4.49 | 43,042 |
