| Countries of the World Quiz | 0 | - | 5.00 | 40,938,581 |
| Landlocked Countries Quiz | 0 | - | 4.99 | 323,866 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,072,246 |
| Members of the Arab League | 0 | - | 4.85 | 61,936 |
| Sahara Desert Countries | 0 | - | 4.97 | 126,936 |
| Himalayan Countries | 0 | - | 4.94 | 104,793 |
| Andean Countries | 0 | - | 4.91 | 58,102 |
| Countries with the Oldest Median Age | 0 | - | 4.84 | 59,063 |
| Countries with the Youngest Median Age | 0 | - | 4.98 | 49,346 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 102,701 |
| Coffee Producing Countries | 0 | - | 4.81 | 54,033 |
| Countries with Shrinking Populations | 0 | - | 4.93 | 53,299 |
| Danube Countries | 0 | - | 4.97 | 56,638 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 91,684 |
| Countries With an "Ese" Demonym | 0 | - | 4.96 | 64,842 |
| Countries with the Best Passports | 0 | - | 4.88 | 71,205 |
| Countries with the Worst Passports | 0 | - | 4.87 | 49,348 |
| Countries with the Most Immigrants | 0 | - | 4.87 | 109,519 |
| European Landlocked Countries | 0 | - | 4.99 | 115,505 |
| Partially Recognized Countries | 0 | - | 4.98 | 89,339 |
| Countries with the Most Species | 0 | - | 4.99 | 89,527 |
| Countries 197 to 205 | 0 | - | 4.88 | 56,336 |
| Tropic of Cancer Countries | 0 | - | 4.96 | 44,680 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 44,003 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 48,264 |
| Countries that Use the Peso | 0 | - | 4.82 | 46,410 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.88 | 58,684 |
| Countries with a AAA Credit Rating | 0 | - | 4.89 | 49,138 |
| Countries in the Alps | 0 | - | 4.84 | 102,631 |
| Top Five Importing Partners by Country | 0 | - | 4.98 | 85,299 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 87,101 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 71,579 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 78,236 |
| Northernmost Countries by Continent | 0 | - | 4.97 | 93,956 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.91 | 87,549 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 89,610 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 46,134 |
| Biggest Country by Body of Water | 0 | - | 4.96 | 45,309 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 54,644 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.88 | 69,410 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 48,588 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 36,664 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 95,474 |
| Arctic Ocean Countries | 0 | - | 4.93 | 71,949 |
| Countries with the Most Grassland | 0 | - | 4.93 | 69,457 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 98,021 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 61,329 |
| Countries that Host the Most Refugees | 0 | - | 4.93 | 53,369 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 196,247 |
| World Countries - Blind Typing | 0 | - | 5.00 | 72,863 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 42,271 |
| Largest Countries By Category | 0 | - | 4.96 | 144,871 |
| Countries by Countries | 0 | - | 4.96 | 54,633 |
| Country Flags with the Most White | 0 | - | 4.90 | 124,427 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 58,699 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 78,190 |
| Spanish-Speaking Countries | 0 | - | 4.94 | 341,150 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 355,555 |
| Island Countries Quiz | 0 | - | 4.99 | 660,571 |
| Biggest Countries by Area | 0 | - | 5.00 | 933,169 |
| Northernmost Countries | 0 | - | 4.99 | 327,203 |
| Countries of South America | 0 | - | 5.00 | 793,335 |
| Countries of Oceania | 0 | - | 5.00 | 893,675 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,152,433 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,572,773 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 125,883 |
| Countries with Megacities | 0 | - | 4.99 | 197,190 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 171,519 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.97 | 97,921 |
| Countries With More than 200 Million People | 0 | - | 4.93 | 95,360 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 63,894 |
| Top 50 Countries by Population - In Order | 0 | - | 4.97 | 247,893 |
| Countries by Official Language | 0 | - | 4.96 | 172,305 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.92 | 249,257 |
| Countries in their Native Language | 0 | - | 4.98 | 178,312 |
| Independence from Whom | 0 | - | 4.99 | 185,612 |
| Subdivisions by Country | 0 | - | 4.82 | 46,436 |
| Who Controlled These Colonies? | 0 | - | 4.89 | 113,457 |
| Megadiverse Countries | 0 | - | 4.96 | 125,313 |
| Countries With the Most English Speakers | 0 | - | 4.87 | 91,391 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 106,677 |
| Most Desired Destinations for Potential Migrants | 0 | - | 4.83 | 47,378 |
| 15 Biggest Island Countries | 0 | - | 4.99 | 131,576 |
| Most Recently-Settled Countries | 0 | - | 4.92 | 49,144 |
| Countries of the World in 1938 Quiz | 0 | - | 4.96 | 77,891 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.95 | 145,119 |
| Countries with Multiple Populous Islands | 0 | - | 4.91 | 77,037 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 41,347 |
| Countries by Sports League Revenue | 0 | - | 4.88 | 43,809 |
| Landmarks of Countries #1 | 0 | - | 4.89 | 101,599 |
| Countries Furthest from the United States | 0 | - | 4.94 | 72,000 |
| Countries with the Highest HDI | 0 | - | 4.95 | 130,964 |
| Straight Shot to the Arctic Circle | 0 | - | 4.92 | 68,537 |
| Most Dispersed Island Nations | 0 | - | 4.96 | 65,269 |
| Countries of the World in Alphabetical Order | 0 | - | 4.99 | 82,223 |
| World Map Quiz | 0 | - | 4.90 | 49,403 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 113,517 |
| Smallest Countries with at Least One Border | 0 | - | 4.89 | 81,487 |
| Southernmost Countries of the World | 0 | - | 4.99 | 206,805 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 90,963 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.90 | 108,047 |
| Countries With the Most Languages | 0 | - | 4.91 | 173,676 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.93 | 87,335 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.86 | 71,621 |
| Countries with the Most Prisoners | 0 | - | 4.93 | 86,338 |
| Countries with the Most Domestic Camels | 0 | - | 4.92 | 53,978 |
| Tallest Countries North to South | 0 | - | 4.84 | 110,462 |
| Widest Countries East to West | 0 | - | 4.93 | 119,380 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 68,823 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 159,026 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 92,663 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 85,600 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 119,355 |
| Countries with the Most Desert | 0 | - | 4.92 | 105,181 |
| Countries by Contribution to UN Budget | 0 | - | 4.86 | 66,462 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.82 | 32,055 |
| Countries with Double Letters | 0 | - | 4.96 | 68,460 |
| Countries that End in N | 0 | - | 4.93 | 132,785 |
| Countries with Five Letters Quiz | 0 | - | 4.96 | 229,829 |
| Countries with Six Letters Quiz | 0 | - | 4.95 | 187,116 |
| Countries with W | 0 | - | 4.96 | 122,761 |
| Countries with Z | 0 | - | 4.98 | 244,509 |
| Countries with Letters Missing | 0 | - | 4.97 | 166,103 |
| Countries That End in U | 0 | - | 4.95 | 107,593 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 89,558 |
| Countries that End in O | 0 | - | 4.92 | 146,963 |
| Countries that End in R | 0 | - | 4.85 | 96,497 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 147,253 |
| Countries Ending in "IA" | 0 | - | 4.99 | 171,435 |
| Countries by First and Last Letter #1 | 0 | - | 4.98 | 155,811 |
| Countries by Last Two Letters | 0 | - | 4.91 | 116,245 |
| Countries by First and Last Letter #2 | 0 | - | 4.94 | 129,316 |
| Countries That End in Y | 0 | - | 4.90 | 161,650 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 161,038 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.91 | 120,790 |
| Countries that End in I | 0 | - | 4.92 | 114,508 |
| Countries Based on First Two Letters #2 | 0 | - | 4.98 | 149,583 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 88,302 |
| Countries That End in NIA | 0 | - | 4.93 | 100,859 |
| Countries That End in BIA | 0 | - | 4.91 | 126,121 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.93 | 153,276 |
| Countries Whose Names Start with Saint | 0 | - | 4.88 | 109,784 |
| Countries That End in RIA | 0 | - | 4.90 | 100,987 |
| Most Common Words in Official Country Names | 0 | - | 4.85 | 100,482 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 200,833 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 119,725 |
| Divided Country Name Puzzle #3 | 0 | - | 4.93 | 110,615 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 4.99 | 77,421 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 92,257 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 96,760 |
| Countries that are Free from U.S.A. | 0 | - | 4.90 | 42,847 |
| Countries Containing Two or More Words | 0 | - | 4.96 | 40,766 |
| Countries that End in L | 0 | - | 4.95 | 134,301 |
| "Land" Countries | 0 | - | 4.98 | 289,257 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 188,885 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.97 | 65,182 |
| City to Country Quiz #1 | 0 | - | 4.94 | 134,302 |
| City to Country Quiz #3 | 0 | - | 4.86 | 100,201 |
| 45 European Countries, 45 Cities | 0 | - | 4.94 | 71,635 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 207,946 |
| Five Poorest Countries by Continent | 0 | - | 4.94 | 166,365 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 116,497 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 133,100 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.92 | 193,940 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 140,896 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 65,906 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.83 | 92,085 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 82,332 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.93 | 56,074 |
| Biggest Countries by Population | 0 | - | 4.99 | 1,311,623 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 349,664 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,064,777 |
| One Border Countries | 0 | - | 4.98 | 410,229 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,395,566 |
| Countries With One Word and Three A's | 0 | - | 4.85 | 30,849 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.94 | 66,129 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 245,089 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 109,053 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 89,979 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.94 | 69,715 |
| Countries by National Anthem | 0 | - | 4.95 | 61,842 |
| NATO Countries Quiz | 0 | - | 4.98 | 225,490 |
| EU Countries Quiz | 0 | - | 4.99 | 227,972 |
| Recently Independent Countries Quiz | 0 | - | 4.98 | 144,712 |
| Natural Features of Countries #1 | 0 | - | 4.85 | 77,623 |
| Countries That Use the Euro | 0 | - | 4.92 | 63,027 |
| Countries with the Most Military Troops | 0 | - | 4.94 | 225,948 |
| Countries with Nuclear Weapons | 0 | - | 4.89 | 217,457 |
| German-Speaking Countries | 0 | - | 4.88 | 117,552 |
| Countries with Wild Tigers | 0 | - | 4.95 | 110,915 |
| Countries with Wild Penguins | 0 | - | 4.93 | 90,204 |
| Solve the Secret Country #1 | 0 | - | 4.95 | 130,116 |
| Top Five Countries by Religion | 0 | - | 4.90 | 142,034 |
| Solve the Secret Country #2 | 0 | - | 4.90 | 88,279 |
| Countries by Hottest Recorded Temperature | 0 | - | 4.91 | 81,626 |
| Olympic Host Countries | 0 | - | 4.98 | 161,867 |
| UNESCO World Heritage Countries | 0 | - | 4.98 | 98,922 |
| Anagram Chain - Countries | 0 | - | 4.98 | 96,741 |
| 10 Easternmost Countries in Europe | 0 | - | 4.85 | 92,286 |
| Countries with the Most Elite Universities | 0 | - | 4.95 | 124,371 |
