| Countries of the World Quiz | 0 | - | 5.00 | 47,146,017 |
| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.97 | 109,604 |
| Landlocked Countries | 0 | - | 4.99 | 416,443 |
| Countries with Glaciers | 0 | - | 4.97 | 104,837 |
| Countries with the Most Forest | 0 | - | 4.87 | 146,854 |
| Countries Reducing Carbon Dioxide Emissions the Most | 0 | - | 4.89 | 64,392 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,739,097 |
| Sahara Desert Countries | 0 | - | 4.98 | 161,828 |
| Himalayan Countries | 0 | - | 4.95 | 136,417 |
| Andean Countries | 0 | - | 4.95 | 83,436 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 62,709 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 123,930 |
| Coffee Producing Countries | 0 | - | 4.83 | 66,389 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 64,989 |
| Danube Countries | 0 | - | 4.97 | 71,376 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 116,180 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 85,834 |
| Countries with the Worst Passports | 0 | - | 4.94 | 83,110 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 148,066 |
| European Landlocked Countries | 0 | - | 4.99 | 146,108 |
| Partially Recognized Countries | 0 | - | 4.98 | 105,722 |
| Countries with the Most Species | 0 | - | 4.99 | 101,008 |
| Countries 197 to 205 | 0 | - | 4.89 | 69,864 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,315 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,497 |
| Countries that Use the Peso | 0 | - | 4.88 | 59,134 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 72,794 |
| Countries with a AAA Credit Rating | 0 | - | 4.85 | 57,165 |
| Countries in the Alps | 0 | - | 4.86 | 117,302 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 94,878 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 105,844 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,237 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 95,720 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 115,795 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.91 | 95,232 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 99,958 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 52,982 |
| Largest Country by Body of Water | 0 | - | 4.96 | 57,786 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,317 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,342 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,196 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,705 |
| Arctic Ocean Countries | 0 | - | 4.95 | 78,980 |
| Countries with the Most Grassland | 0 | - | 4.93 | 76,991 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 117,668 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 67,876 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,414 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 45,209 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 240,883 |
| World Countries - Blind Typing | 0 | - | 5.00 | 106,512 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 47,807 |
| Largest Countries By Category | 0 | - | 4.97 | 157,224 |
| Countries by Countries | 0 | - | 4.96 | 62,573 |
| Country Flags with the Most White | 0 | - | 4.87 | 137,851 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,073 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,406 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 88,065 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 326,640 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 373,739 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 403,603 |
| Island Countries | 0 | - | 4.99 | 708,743 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,043,079 |
| Northernmost Countries | 0 | - | 4.99 | 359,258 |
| Countries of South America | 0 | - | 5.00 | 919,356 |
| Countries of Oceania | 0 | - | 5.00 | 1,046,258 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,857,888 |
| "Land" Countries | 0 | - | 4.98 | 334,504 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,369,894 |
| Elements Named for Countries | 0 | - | 4.52 | 24,538 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 172,215 |
| Countries with Megacities | 0 | - | 4.99 | 248,819 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 198,066 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 112,515 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 136,438 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 80,467 |
| Countries by Official Language | 0 | - | 4.95 | 193,949 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 294,456 |
| Countries in their Native Language | 0 | - | 4.99 | 197,576 |
| Independence from Whom | 0 | - | 4.99 | 210,709 |
| Subdivisions by Country | 0 | - | 4.86 | 50,188 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,286 |
| Megadiverse Countries | 0 | - | 4.96 | 134,522 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 130,776 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,071 |
| Countries with Multiple Big Islands | 0 | - | 4.92 | 125,618 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 74,943 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 162,419 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,201 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,539 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,529 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,357 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 44,803 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 76,128 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,572 |
| Countries Furthest from the United States | 0 | - | 4.94 | 88,676 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,633 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 74,842 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,185 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 109,473 |
| World Map Quiz | 0 | - | 4.81 | 64,039 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 154,244 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 106,668 |
| Countries by Founding Story | 0 | - | 4.95 | 76,845 |
| Countries by Road Signs | 0 | - | 4.98 | 53,387 |
| Southernmost Countries of the World | 0 | - | 4.99 | 227,017 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 104,643 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,374 |
| Countries With the Most Languages | 0 | - | 4.89 | 200,637 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,238 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,434 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,602 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,134 |
| Tallest Countries North to South | 0 | - | 4.83 | 119,621 |
| Widest Countries East to West | 0 | - | 4.92 | 129,123 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,322 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 185,621 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 97,903 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 93,938 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 147,959 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,336 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,063 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.84 | 34,664 |
| Countries with Double Letters | 0 | - | 4.96 | 94,013 |
| Countries that End in N | 0 | - | 4.94 | 163,881 |
| Countries with Five Letters Quiz | 0 | - | 4.96 | 259,442 |
| Countries with Six Letters | 0 | - | 4.93 | 211,025 |
| Countries with W | 0 | - | 4.97 | 158,719 |
| Countries with Z | 0 | - | 4.98 | 288,632 |
| Countries with Letters Missing | 0 | - | 4.97 | 184,968 |
| Countries That End in U | 0 | - | 4.95 | 119,839 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 133,095 |
| Countries that End in O | 0 | - | 4.92 | 158,805 |
| Countries that End in R | 0 | - | 4.87 | 118,477 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,008 |
| Countries Ending in "IA" | 0 | - | 4.99 | 207,669 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 169,701 |
| Countries by Last Two Letters | 0 | - | 4.85 | 134,780 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,345 |
| Countries That End in Y | 0 | - | 4.90 | 185,387 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 196,790 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 152,049 |
| Countries that End in I | 0 | - | 4.94 | 134,640 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 182,657 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,388 |
| Countries That End in NIA | 0 | - | 4.92 | 109,274 |
| Countries That End in BIA | 0 | - | 4.93 | 148,522 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,395 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 118,742 |
| Countries That End in RIA | 0 | - | 4.93 | 126,312 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 110,300 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 226,027 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 132,822 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 125,166 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 90,737 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,124 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,413 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 102,920 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 124,812 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 48,980 |
| Countries with the Word "And" | 0 | - | 4.99 | 116,486 |
| Countries Containing Two or More Words | 0 | - | 4.96 | 53,163 |
| Countries that End in L | 0 | - | 4.94 | 156,262 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 212,775 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,055 |
| City to Country Quiz #1 | 0 | - | 4.96 | 155,701 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,547 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,604 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 248,271 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 199,784 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 142,274 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 162,794 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 224,213 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 152,028 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 70,860 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.81 | 108,283 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,505 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,496 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,439,615 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 378,762 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,812,517 |
| One Border Countries | 0 | - | 4.98 | 466,298 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,603,070 |
| Countries with the Most HIV | 0 | - | 4.46 | 44,379 |
| Countries with the Most Malaria Deaths | 0 | - | 4.45 | 45,061 |
| Countries that Desalinate the Most Water | 0 | - | 4.77 | 41,466 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.95 | 86,257 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 266,858 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 121,300 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,063 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 93,070 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 58,612 |
| Majority Muslim Countries | 0 | - | 4.98 | 371,672 |
| Countries by National Anthem | 0 | - | 4.92 | 71,109 |
| NATO Countries | 0 | - | 4.98 | 277,946 |
| EU Countries Quiz | 0 | - | 4.99 | 271,486 |
| Recently Independent Countries | 0 | - | 4.98 | 158,349 |
| French-Speaking Countries | 0 | - | 4.85 | 269,701 |
| Natural Features of Countries #1 | 0 | - | 4.86 | 83,482 |
| Countries That Use the Euro | 0 | - | 4.95 | 103,866 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 286,257 |
