| Countries of the World Quiz | 0 | - | 5.00 | 47,919,105 |
| Landlocked Countries | 0 | - | 4.99 | 426,527 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,807,799 |
| Sahara Desert Countries | 0 | - | 4.98 | 166,541 |
| Himalayan Countries | 0 | - | 4.93 | 140,473 |
| Andean Countries | 0 | - | 4.94 | 85,616 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 64,745 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 127,211 |
| Coffee Producing Countries | 0 | - | 4.83 | 68,312 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 66,543 |
| Danube Countries | 0 | - | 4.97 | 72,467 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 117,678 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,899 |
| Countries with the Worst Passports | 0 | - | 4.93 | 85,260 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 150,735 |
| European Landlocked Countries | 0 | - | 4.99 | 147,670 |
| Partially Recognized Countries | 0 | - | 4.98 | 107,395 |
| Countries with the Most Species | 0 | - | 4.99 | 103,604 |
| Countries 197 to 205 | 0 | - | 4.90 | 71,508 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,791 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,912 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,876 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,616 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 58,067 |
| Countries in the Alps | 0 | - | 4.87 | 118,855 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 102,789 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 107,989 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 79,010 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 97,090 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 117,038 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 96,320 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 101,469 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,922 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,463 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 63,234 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,914 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.91 | 41,782 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,608 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,847 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,948 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 119,985 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,656 |
| Countries that Host the Most Refugees | 0 | - | 4.96 | 75,536 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 46,743 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 245,951 |
| World Countries - Blind Typing | 0 | - | 5.00 | 109,300 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,550 |
| Largest Countries By Category | 0 | - | 4.97 | 158,948 |
| Countries by Countries | 0 | - | 4.96 | 63,707 |
| Country Flags with the Most White | 0 | - | 4.85 | 139,332 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,426 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,689 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 89,151 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 335,966 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 376,845 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 409,992 |
| Island Countries | 0 | - | 4.99 | 712,754 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,055,354 |
| Northernmost Countries | 0 | - | 4.99 | 364,275 |
| Countries of South America | 0 | - | 5.00 | 933,384 |
| Countries of Oceania | 0 | - | 5.00 | 1,064,366 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,890,934 |
| "Land" Countries | 0 | - | 4.98 | 338,543 |
| United States Immigration by Country | 0 | - | 4.69 | 161,428 |
| Countries With the Most Expats | 0 | - | 4.69 | 49,641 |
| Countries with the Most Immigrants per Capita | 0 | - | 4.53 | 62,787 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,395,233 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 175,313 |
| Countries with Megacities | 0 | - | 4.99 | 267,447 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 200,983 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 114,227 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 139,310 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 82,331 |
| Countries by Official Language | 0 | - | 4.95 | 196,115 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 297,778 |
| Countries in their Native Language | 0 | - | 4.99 | 199,836 |
| Independence from Whom | 0 | - | 4.99 | 213,219 |
| Subdivisions by Country | 0 | - | 4.87 | 50,641 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 133,558 |
| Megadiverse Countries | 0 | - | 4.96 | 144,457 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 133,032 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 55,554 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 126,748 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,238 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 164,345 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,888 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 95,182 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 154,590 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 96,120 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,275 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 78,635 |
| Landmarks of Countries #1 | 0 | - | 4.89 | 108,431 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,463 |
| Countries with the Highest HDI | 0 | - | 4.95 | 137,175 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,602 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,913 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 112,526 |
| World Map Quiz | 0 | - | 4.81 | 65,822 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 159,537 |
| Smallest Countries with at Least One Border | 0 | - | 4.88 | 107,757 |
| Countries by Founding Story | 0 | - | 4.95 | 77,853 |
| Countries by Road Signs | 0 | - | 4.98 | 54,393 |
| Southernmost Countries of the World | 0 | - | 4.99 | 229,375 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 106,153 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 123,621 |
| Countries With the Most Languages | 0 | - | 4.90 | 203,731 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.96 | 111,483 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 94,601 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,788 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,723 |
| Tallest Countries North to South | 0 | - | 4.85 | 130,844 |
| Widest Countries East to West | 0 | - | 4.92 | 130,777 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,616 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 187,303 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,534 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 95,096 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 149,036 |
| Countries with the Most Desert | 0 | - | 4.93 | 128,533 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,517 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,906 |
| Countries with Double Letters | 0 | - | 4.96 | 97,213 |
| Countries that End in N | 0 | - | 4.95 | 172,284 |
| Countries with Five Letters | 0 | - | 4.96 | 284,176 |
| Countries with Six Letters | 0 | - | 4.94 | 214,632 |
| Countries with W | 0 | - | 4.96 | 161,052 |
| Countries with Z | 0 | - | 4.98 | 292,611 |
| Countries with Letters Missing | 0 | - | 4.96 | 187,389 |
| Countries That End in U | 0 | - | 4.95 | 121,247 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 135,195 |
| Countries that End in O | 0 | - | 4.92 | 160,267 |
| Countries that End in R | 0 | - | 4.87 | 119,216 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,979 |
| Countries Ending in "IA" | 0 | - | 4.99 | 209,963 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 171,226 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,877 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 142,809 |
| Countries That End in Y | 0 | - | 4.91 | 186,113 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 198,534 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 153,326 |
| Countries that End in I | 0 | - | 4.94 | 135,362 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 184,693 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 96,089 |
| Countries That End in NIA | 0 | - | 4.92 | 110,097 |
| Countries That End in BIA | 0 | - | 4.93 | 149,640 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 167,793 |
| Countries Whose Names Start with Saint | 0 | - | 4.88 | 119,812 |
| Countries That End in RIA | 0 | - | 4.93 | 127,089 |
| Most Common Words in Official Country Names | 0 | - | 4.85 | 111,447 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 228,745 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 134,260 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 126,713 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 92,259 |
| Add A Letter - Make a Country | 0 | - | 4.81 | 74,840 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 53,367 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,555 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,970 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,673 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,797 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 54,488 |
| Countries that End in L | 0 | - | 4.94 | 157,181 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 218,228 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,361 |
| City to Country Quiz #1 | 0 | - | 4.97 | 157,575 |
| City to Country Quiz #3 | 0 | - | 4.88 | 120,046 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 79,490 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 250,525 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 201,205 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 143,466 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 164,335 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 226,059 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 153,263 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 71,259 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.81 | 108,956 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,852 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 63,292 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,454,959 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 382,696 |
| One Border Countries | 0 | - | 4.98 | 472,217 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,850,654 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,655,947 |
| Every Country in its Official/Native Language | 0 | - | 4.98 | 25,721 |
| Countries by Net Migration | 0 | - | 4.52 | 84,248 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.96 | 87,393 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 269,349 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 122,731 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,947 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.90 | 94,288 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 59,672 |
| Countries by National Anthem | 0 | - | 4.92 | 71,421 |
| NATO Countries | 0 | - | 4.98 | 283,678 |
| EU Countries Quiz | 0 | - | 4.99 | 278,241 |
| Recently Independent Countries | 0 | - | 4.98 | 160,412 |
| French-Speaking Countries | 0 | - | 4.85 | 271,765 |
| Natural Features of Countries #1 | 0 | - | 4.87 | 84,172 |
| Countries That Use the Euro | 0 | - | 4.95 | 106,974 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 291,607 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 277,280 |
| German-Speaking Countries | 0 | - | 4.92 | 146,049 |
| Countries with Wild Tigers | 0 | - | 4.96 | 137,622 |
| Countries with Wild Penguins | 0 | - | 4.94 | 100,742 |
