| Countries of the World Quiz | 0 | - | 5.00 | 47,922,798 |
| Countries with Wild Tigers | 0 | - | 4.96 | 137,640 |
| Countries with Wild Penguins | 0 | - | 4.94 | 100,759 |
| Countries with the Most Venomous Animal Species | 0 | - | 4.87 | 87,728 |
| Landlocked Countries | 0 | - | 4.99 | 426,602 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,808,071 |
| Countries with the Most Sheep | 0 | - | 4.93 | 103,729 |
| Sahara Desert Countries | 0 | - | 4.98 | 166,581 |
| Himalayan Countries | 0 | - | 4.93 | 140,515 |
| Andean Countries | 0 | - | 4.94 | 85,636 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 64,769 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 127,236 |
| Coffee Producing Countries | 0 | - | 4.83 | 68,325 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 66,559 |
| Danube Countries | 0 | - | 4.97 | 72,474 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 117,690 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,903 |
| Countries with the Worst Passports | 0 | - | 4.93 | 85,277 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 150,743 |
| European Landlocked Countries | 0 | - | 4.99 | 147,675 |
| Partially Recognized Countries | 0 | - | 4.98 | 107,409 |
| Countries with the Most Species | 0 | - | 4.99 | 103,607 |
| Countries 197 to 205 | 0 | - | 4.90 | 71,516 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,791 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,916 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,881 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,621 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 58,077 |
| Countries in the Alps | 0 | - | 4.87 | 118,860 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 102,806 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 108,006 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 79,014 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 97,096 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 117,042 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 96,327 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 101,474 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,926 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,468 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 63,241 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,916 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.91 | 41,787 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,618 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,854 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,953 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 120,005 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,662 |
| Countries that Host the Most Refugees | 0 | - | 4.96 | 75,660 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 46,756 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 245,970 |
| World Countries - Blind Typing | 0 | - | 5.00 | 109,316 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,557 |
| Largest Countries By Category | 0 | - | 4.97 | 158,956 |
| Countries by Countries | 0 | - | 4.97 | 63,717 |
| Country Flags with the Most White | 0 | - | 4.85 | 139,337 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,427 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,689 |
| All Countries by Population With a Map | 0 | - | 4.98 | 111,198 |
| Six Degrees of Separation - Countries #1 | 0 | - | 4.96 | 99,471 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 89,155 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 335,996 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 376,865 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 410,019 |
| Island Countries | 0 | - | 4.99 | 712,767 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,055,420 |
| Northernmost Countries | 0 | - | 4.99 | 364,304 |
| Countries of South America | 0 | - | 5.00 | 933,460 |
| Countries of Oceania | 0 | - | 5.00 | 1,064,442 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,891,078 |
| "Land" Countries | 0 | - | 4.98 | 338,574 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,395,366 |
| Countries that Catch the Most Fish | 0 | - | 4.90 | 113,223 |
| Countries with the Most Wolves | 0 | - | 4.92 | 108,684 |
| Countries With Two or More Bear Species | 0 | - | 4.90 | 22,915 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 175,331 |
| Countries with Megacities | 0 | - | 4.99 | 267,484 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 200,993 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 114,234 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 139,325 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 82,336 |
| Countries by Official Language | 0 | - | 4.95 | 196,123 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 297,787 |
| Countries in their Native Language | 0 | - | 4.99 | 199,847 |
| Independence from Whom | 0 | - | 4.99 | 213,233 |
| Subdivisions by Country | 0 | - | 4.87 | 50,642 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 133,563 |
| Megadiverse Countries | 0 | - | 4.96 | 145,485 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 133,038 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 55,557 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 126,752 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,239 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 164,356 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,891 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 95,186 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 154,595 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 96,127 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,275 |
| Countries by Sports League Revenue | 0 | - | 4.95 | 78,643 |
| Landmarks of Countries #1 | 0 | - | 4.89 | 108,434 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,465 |
| Countries with the Highest HDI | 0 | - | 4.95 | 137,179 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,606 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,917 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 112,540 |
| World Map Quiz | 0 | - | 4.81 | 65,826 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 159,566 |
| Smallest Countries with at Least One Border | 0 | - | 4.88 | 107,758 |
| Countries by Founding Story | 0 | - | 4.95 | 77,859 |
| Countries by Road Signs | 0 | - | 4.98 | 54,394 |
| Southernmost Countries of the World | 0 | - | 4.99 | 229,384 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 106,159 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 123,623 |
| Countries With the Most Languages | 0 | - | 4.90 | 203,741 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.96 | 111,488 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 94,607 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,791 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,729 |
| Tallest Countries North to South | 0 | - | 4.85 | 130,854 |
| Widest Countries East to West | 0 | - | 4.92 | 130,778 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,617 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 187,311 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,536 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 95,103 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 149,044 |
| Countries with the Most Desert | 0 | - | 4.93 | 128,539 |
| Countries by Contribution to UN Budget | 0 | - | 4.88 | 77,518 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,909 |
| Countries with Double Letters | 0 | - | 4.96 | 97,250 |
| Countries that End in N | 0 | - | 4.95 | 172,344 |
| Countries with Five Letters | 0 | - | 4.96 | 284,222 |
| Countries with Six Letters | 0 | - | 4.94 | 214,658 |
| Countries with W | 0 | - | 4.96 | 161,072 |
| Countries with Z | 0 | - | 4.98 | 292,638 |
| Countries with Letters Missing | 0 | - | 4.96 | 187,415 |
| Countries That End in U | 0 | - | 4.95 | 121,261 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 135,214 |
| Countries that End in O | 0 | - | 4.92 | 160,274 |
| Countries that End in R | 0 | - | 4.87 | 119,222 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,981 |
| Countries Ending in "IA" | 0 | - | 4.99 | 209,973 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 173,406 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,908 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 142,922 |
| Countries That End in Y | 0 | - | 4.91 | 186,118 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 198,611 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 153,332 |
| Countries that End in I | 0 | - | 4.94 | 135,364 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 184,742 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 96,093 |
| Countries That End in NIA | 0 | - | 4.92 | 110,100 |
| Countries That End in BIA | 0 | - | 4.93 | 149,648 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 167,822 |
| Countries Whose Names Start with Saint | 0 | - | 4.88 | 119,816 |
| Countries That End in RIA | 0 | - | 4.93 | 127,093 |
| Most Common Words in Official Country Names | 0 | - | 4.85 | 111,452 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 228,765 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 134,266 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 126,726 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 92,280 |
| Add A Letter - Make a Country | 0 | - | 4.81 | 74,850 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 53,374 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,557 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,974 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,677 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,802 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 54,494 |
| Countries that End in L | 0 | - | 4.94 | 157,185 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 218,244 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,362 |
| City to Country Quiz #1 | 0 | - | 4.97 | 157,601 |
| City to Country Quiz #3 | 0 | - | 4.88 | 120,057 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 79,498 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 250,537 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 201,221 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 143,471 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 164,337 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 226,074 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 153,268 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 71,270 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.81 | 108,959 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,853 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 63,298 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,455,040 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 382,722 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,850,841 |
| One Border Countries | 0 | - | 4.98 | 472,247 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,656,260 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,378 |
| Countries with the Most Wild Elephants | 0 | - | 4.63 | 55,200 |
| Animal Populations of Countries | 0 | - | 4.52 | 44,084 |
| Top 10 European Countries by Coastline | 0 | - | 4.86 | 138,768 |
| Top 10 Asian Countries by Coastline | 0 | - | 4.92 | 96,720 |
| European Countries with NO Wolves | 0 | - | 4.56 | 65,716 |
| Every Country in its Official/Native Language | 0 | - | 4.98 | 25,725 |
| Top 15 Countries with the Most Cows | 0 | - | 4.74 | 107,514 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.96 | 87,404 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 269,366 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 122,736 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,948 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.91 | 94,296 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 59,675 |
