| Countries of the World Quiz | 0 | - | 5.00 | 47,003,461 |
| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.97 | 109,563 |
| Landlocked Countries | 0 | - | 4.99 | 414,634 |
| Countries with the Most HIV | 0 | - | 4.46 | 44,342 |
| Countries with the Most Malaria Deaths | 0 | - | 4.45 | 44,952 |
| Countries with Glaciers | 0 | - | 4.97 | 104,736 |
| Countries with the Most Forest | 0 | - | 4.87 | 146,716 |
| Countries Reducing Carbon Dioxide Emissions the Most | 0 | - | 4.89 | 64,298 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,725,160 |
| Sahara Desert Countries | 0 | - | 4.98 | 161,015 |
| Himalayan Countries | 0 | - | 4.95 | 135,717 |
| Andean Countries | 0 | - | 4.94 | 83,032 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 62,381 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 123,452 |
| Coffee Producing Countries | 0 | - | 4.81 | 66,081 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 64,743 |
| Danube Countries | 0 | - | 4.97 | 71,186 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 115,907 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 85,645 |
| Countries with the Worst Passports | 0 | - | 4.94 | 82,718 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 147,618 |
| European Landlocked Countries | 0 | - | 4.99 | 145,881 |
| Partially Recognized Countries | 0 | - | 4.98 | 105,371 |
| Countries with the Most Species | 0 | - | 4.99 | 95,301 |
| Countries 197 to 205 | 0 | - | 4.89 | 69,542 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,239 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,407 |
| Countries that Use the Peso | 0 | - | 4.88 | 59,020 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 72,658 |
| Countries with a AAA Credit Rating | 0 | - | 4.85 | 57,026 |
| Countries in the Alps | 0 | - | 4.86 | 116,990 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 94,686 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 105,462 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,111 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 95,514 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 115,301 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.91 | 95,095 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 99,703 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 52,845 |
| Largest Country by Body of Water | 0 | - | 4.96 | 57,605 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,156 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,236 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,103 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,544 |
| Arctic Ocean Countries | 0 | - | 4.95 | 78,829 |
| Countries with the Most Grassland | 0 | - | 4.93 | 76,833 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 117,305 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 67,741 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,313 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 44,952 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 239,880 |
| World Countries - Blind Typing | 0 | - | 5.00 | 106,007 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 47,686 |
| Largest Countries By Category | 0 | - | 4.97 | 156,912 |
| Countries by Countries | 0 | - | 4.96 | 62,371 |
| Country Flags with the Most White | 0 | - | 4.87 | 137,555 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,001 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,359 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 87,864 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 325,228 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 372,500 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 402,371 |
| Island Countries | 0 | - | 4.99 | 708,027 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,040,858 |
| Northernmost Countries | 0 | - | 4.99 | 358,293 |
| Countries of South America | 0 | - | 5.00 | 916,651 |
| Countries of Oceania | 0 | - | 5.00 | 1,042,676 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,851,921 |
| "Land" Countries | 0 | - | 4.98 | 333,922 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,365,195 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 171,713 |
| Countries with Megacities | 0 | - | 4.99 | 247,777 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 197,567 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 112,240 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 135,964 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 80,188 |
| Countries by Official Language | 0 | - | 4.95 | 192,987 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 293,437 |
| Countries in their Native Language | 0 | - | 4.99 | 196,845 |
| Independence from Whom | 0 | - | 4.99 | 209,960 |
| Subdivisions by Country | 0 | - | 4.86 | 50,115 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 130,934 |
| Megadiverse Countries | 0 | - | 4.97 | 133,983 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 130,015 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 54,969 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,482 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 74,889 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 161,791 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,075 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,221 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,245 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,267 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 44,768 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 75,770 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,467 |
| Countries Furthest from the United States | 0 | - | 4.94 | 88,568 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,557 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 74,750 |
| Most Dispersed Island Nations | 0 | - | 4.96 | 71,078 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 108,904 |
| World Map Quiz | 0 | - | 4.81 | 63,690 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 153,266 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 106,447 |
| Countries by Founding Story | 0 | - | 4.95 | 76,641 |
| Countries by Road Signs | 0 | - | 4.98 | 53,213 |
| Southernmost Countries of the World | 0 | - | 4.99 | 226,615 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 104,390 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,130 |
| Countries With the Most Languages | 0 | - | 4.90 | 200,107 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,028 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,217 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,417 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,023 |
| Tallest Countries North to South | 0 | - | 4.83 | 119,463 |
| Widest Countries East to West | 0 | - | 4.92 | 128,957 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,261 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 185,369 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 97,617 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 93,790 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 147,727 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,156 |
| Countries by Contribution to UN Budget | 0 | - | 4.89 | 74,400 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.84 | 34,626 |
| Countries with Double Letters | 0 | - | 4.97 | 93,585 |
| Countries that End in N | 0 | - | 4.94 | 157,064 |
| Countries with Five Letters Quiz | 0 | - | 4.96 | 258,906 |
| Countries with Six Letters | 0 | - | 4.93 | 210,572 |
| Countries with W | 0 | - | 4.97 | 158,360 |
| Countries with Z | 0 | - | 4.98 | 288,098 |
| Countries with Letters Missing | 0 | - | 4.97 | 184,685 |
| Countries That End in U | 0 | - | 4.95 | 119,588 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 132,782 |
| Countries that End in O | 0 | - | 4.92 | 158,617 |
| Countries that End in R | 0 | - | 4.87 | 118,338 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 154,907 |
| Countries Ending in "IA" | 0 | - | 4.99 | 207,306 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 169,470 |
| Countries by Last Two Letters | 0 | - | 4.85 | 134,592 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,137 |
| Countries That End in Y | 0 | - | 4.90 | 185,260 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 196,531 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 151,823 |
| Countries that End in I | 0 | - | 4.94 | 134,501 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 182,363 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,259 |
| Countries That End in NIA | 0 | - | 4.92 | 109,080 |
| Countries That End in BIA | 0 | - | 4.92 | 147,805 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,187 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 118,588 |
| Countries That End in RIA | 0 | - | 4.93 | 126,158 |
| Most Common Words in Official Country Names | 0 | - | 4.85 | 110,121 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 225,557 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 132,619 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 124,981 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 90,478 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 73,985 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,220 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 102,740 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 124,621 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 48,860 |
| Countries with the Word "And" | 0 | - | 4.99 | 116,254 |
| Countries Containing Two or More Words | 0 | - | 4.96 | 52,923 |
| Countries that End in L | 0 | - | 4.94 | 156,112 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 211,784 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,012 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,586 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,388 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,485 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 247,746 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 199,507 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 140,839 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 162,564 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 223,924 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 151,852 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 70,779 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.81 | 108,222 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,447 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,386 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,436,848 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 378,075 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,805,138 |
| One Border Countries | 0 | - | 4.98 | 465,116 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,593,146 |
| Countries that Desalinate the Most Water | 0 | - | 4.77 | 41,404 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.95 | 86,079 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 266,341 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 121,072 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 111,579 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 92,859 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 58,442 |
| Majority Muslim Countries | 0 | - | 4.98 | 369,904 |
| Countries by National Anthem | 0 | - | 4.92 | 71,054 |
| NATO Countries | 0 | - | 4.98 | 276,763 |
| EU Countries Quiz | 0 | - | 4.99 | 270,535 |
| Recently Independent Countries | 0 | - | 4.98 | 158,110 |
| French-Speaking Countries | 0 | - | 4.85 | 269,099 |
| Natural Features of Countries #1 | 0 | - | 4.86 | 83,422 |
| Countries That Use the Euro | 0 | - | 4.95 | 103,331 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 285,427 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 269,013 |
