| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,412,962 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,261,845 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 98,538 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 135,684 |
| Countries within the Arctic Circle - Map Quiz | 0 | - | 4.85 | 58,586 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,637,276 |
| Landlocked Countries Quiz | 0 | - | 4.99 | 383,773 |
| Countries of the World Quiz | 0 | - | 5.00 | 44,399,785 |
| Countries of the World in 1900 | 0 | - | 4.88 | 76,316 |
| Countries of the World in 1914 with a Map | 0 | - | 4.99 | 183,792 |
| All Countries by Northernmost Point on Land | 0 | - | 4.90 | 118,232 |
| 20 Countries on an Empty Map #1 | 0 | - | 4.95 | 58,807 |
| Countries of the World in 1945 with a Map | 0 | - | 5.00 | 140,268 |
| Sahara Desert Countries | 0 | - | 4.97 | 146,044 |
| Himalayan Countries | 0 | - | 4.94 | 122,679 |
| Andean Countries | 0 | - | 4.93 | 68,978 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 56,891 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 113,409 |
| Coffee Producing Countries | 0 | - | 4.83 | 60,105 |
| Countries with Shrinking Populations | 0 | - | 4.92 | 59,460 |
| Danube Countries | 0 | - | 4.97 | 60,944 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 97,016 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 81,993 |
| Countries with the Best Passports | 0 | - | 4.84 | 81,046 |
| Countries with the Worst Passports | 0 | - | 4.91 | 72,343 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 138,566 |
| European Landlocked Countries | 0 | - | 4.99 | 141,117 |
| Partially Recognized Countries | 0 | - | 4.98 | 98,296 |
| Countries with the Most Species | 0 | - | 4.99 | 92,422 |
| Countries 197 to 205 | 0 | - | 4.87 | 63,665 |
| Tropic of Cancer Countries | 0 | - | 4.95 | 46,740 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 45,840 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 52,682 |
| Countries that Use the Peso | 0 | - | 4.89 | 56,456 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.87 | 70,015 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 53,771 |
| Countries in the Alps | 0 | - | 4.86 | 110,962 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 90,843 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 98,017 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 75,475 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 83,863 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 110,743 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.90 | 92,028 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 95,130 |
| Five Biggest Countries by Longitude | 0 | - | 4.90 | 49,942 |
| Biggest Country by Body of Water | 0 | - | 4.95 | 48,034 |
| Countries with the Most Container Port Traffic | 0 | - | 4.91 | 58,891 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 72,788 |
| Bridge and Tunnel Borders | 0 | - | 4.95 | 51,319 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.89 | 39,142 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 100,249 |
| Arctic Ocean Countries | 0 | - | 4.94 | 75,930 |
| Countries with the Most Grassland | 0 | - | 4.93 | 73,650 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 109,244 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 64,894 |
| Countries that Host the Most Refugees | 0 | - | 4.94 | 56,829 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 222,604 |
| World Countries - Blind Typing | 0 | - | 5.00 | 95,396 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 45,182 |
| Largest Countries By Category | 0 | - | 4.97 | 151,565 |
| Countries by Countries | 0 | - | 4.96 | 58,546 |
| Country Flags with the Most White | 0 | - | 4.87 | 132,222 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 60,698 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.86 | 46,356 |
| All Countries by Population With a Map | 0 | - | 4.98 | 94,618 |
| Six Degrees of Separation - Countries #1 | 0 | - | 4.96 | 92,306 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 84,049 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,481,764 |
| Pixelated World Map | 0 | - | 5.00 | 136,853 |
| Countries of Europe in 1444 | 0 | - | 4.93 | 94,202 |
| Countries of the World in 1444 | 0 | - | 4.98 | 56,383 |
| Modern-Day Countries of the Inca Empire on a Map | 0 | - | 4.82 | 53,695 |
| Countries of the World with a Borderless Map | 0 | - | 4.99 | 76,979 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 360,577 |
| Countries with the Most Tourists Quiz | 0 | - | 4.91 | 382,866 |
| Island Countries Quiz | 0 | - | 4.99 | 691,497 |
| Biggest Countries by Area | 0 | - | 5.00 | 990,934 |
| Northernmost Countries | 0 | - | 4.99 | 343,012 |
| Countries of South America | 0 | - | 5.00 | 864,538 |
| Countries of Oceania | 0 | - | 5.00 | 977,775 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,734,545 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 159,494 |
| Countries with Megacities | 0 | - | 4.99 | 218,643 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 187,111 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.97 | 106,424 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 126,990 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.97 | 73,476 |
| Top 50 Countries by Population - In Order | 0 | - | 4.97 | 270,493 |
| Global Cities on a World Map | 0 | - | 4.94 | 97,532 |
| Countries by Official Language | 0 | - | 4.95 | 184,386 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 282,517 |
| Countries in their Native Language | 0 | - | 4.98 | 189,127 |
| Independence from Whom | 0 | - | 4.99 | 200,179 |
| Subdivisions by Country | 0 | - | 4.85 | 48,581 |
| Who Controlled These Colonies? | 0 | - | 4.90 | 123,977 |
| Megadiverse Countries | 0 | - | 4.96 | 130,589 |
| Countries With the Most English Speakers | 0 | - | 4.89 | 122,420 |
| Countries with Multiple Big Islands | 0 | - | 4.92 | 122,050 |
| Most Desired Destinations for Potential Migrants | 0 | - | 4.82 | 49,367 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 155,691 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 59,554 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 87,001 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.94 | 149,388 |
| Countries with Multiple Populous Islands | 0 | - | 4.91 | 80,614 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 43,454 |
| Countries by Sports League Revenue | 0 | - | 4.93 | 67,868 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 104,949 |
| Countries Furthest from the United States | 0 | - | 4.95 | 86,052 |
| Countries with the Highest HDI | 0 | - | 4.95 | 134,298 |
| Straight Shot to the Arctic Circle | 0 | - | 4.89 | 72,242 |
| Most Dispersed Island Nations | 0 | - | 4.96 | 68,754 |
| Mediterranean Countries with an Empty Map | 0 | - | 4.99 | 101,366 |
| World Map Quiz | 0 | - | 4.88 | 57,882 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 86,888 |
| Countries by Founding Story | 0 | - | 4.94 | 73,000 |
| Countries by Road Signs | 0 | - | 4.98 | 49,805 |
| Southernmost Countries of the World | 0 | - | 4.99 | 218,878 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 98,901 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 116,760 |
| Countries With the Most Languages | 0 | - | 4.89 | 189,625 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.93 | 92,631 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.89 | 88,720 |
| Countries with the Most Prisoners | 0 | - | 4.93 | 93,739 |
| Countries with the Most Domestic Camels | 0 | - | 4.93 | 58,456 |
| Tallest Countries North to South | 0 | - | 4.85 | 115,746 |
| Widest Countries East to West | 0 | - | 4.92 | 124,889 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 70,225 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 180,462 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 95,528 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 90,406 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 125,575 |
| Countries with the Most Desert | 0 | - | 4.93 | 123,493 |
| Countries by Contribution to UN Budget | 0 | - | 4.85 | 68,080 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 33,608 |
| Countries with Double Letters | 0 | - | 4.96 | 83,049 |
| Countries that End in N | 0 | - | 4.94 | 146,815 |
| Countries with Five Letters Quiz | 0 | - | 4.96 | 246,866 |
| Countries with Six Letters Quiz | 0 | - | 4.94 | 201,196 |
| Countries with W | 0 | - | 4.97 | 150,370 |
| Countries with Z | 0 | - | 4.98 | 276,786 |
| Countries with Letters Missing | 0 | - | 4.97 | 177,003 |
| Countries That End in U | 0 | - | 4.95 | 114,723 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 101,146 |
| Countries that End in O | 0 | - | 4.92 | 154,719 |
| Countries that End in R | 0 | - | 4.84 | 100,177 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 152,120 |
| Countries Ending in "IA" | 0 | - | 4.99 | 198,639 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 163,625 |
| Countries by Last Two Letters | 0 | - | 4.87 | 122,072 |
| Countries by First and Last Letter #2 | 0 | - | 4.95 | 135,878 |
| Countries That End in Y | 0 | - | 4.91 | 182,315 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 189,599 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.91 | 128,113 |
| Countries that End in I | 0 | - | 4.92 | 117,593 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 158,714 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 92,374 |
| Countries That End in NIA | 0 | - | 4.92 | 105,289 |
| Countries That End in BIA | 0 | - | 4.92 | 142,952 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 161,516 |
| Countries Whose Names Start with Saint | 0 | - | 4.86 | 114,997 |
| Countries That End in RIA | 0 | - | 4.89 | 105,638 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 106,147 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 215,904 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 127,560 |
| Divided Country Name Puzzle #3 | 0 | - | 4.91 | 119,464 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 4.99 | 85,302 |
| Add A Letter - Make a Country | 0 | - | 4.81 | 71,388 |
| Countries With One Word and Three A's | 0 | - | 4.94 | 48,824 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 98,360 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.97 | 120,248 |
| Countries that are Free from U.S.A. | 0 | - | 4.87 | 46,447 |
| Countries with the Word "And" | 0 | - | 4.98 | 90,133 |
| Countries Containing Two or More Words | 0 | - | 4.96 | 48,076 |
| Countries that End in L | 0 | - | 4.94 | 152,007 |
| "Land" Countries | 0 | - | 4.98 | 300,051 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 197,882 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 84,008 |
| City to Country Quiz #1 | 0 | - | 4.96 | 150,777 |
| City to Country Quiz #3 | 0 | - | 4.87 | 104,858 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 75,740 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 220,163 |
| Five Poorest Countries by Continent | 0 | - | 4.94 | 193,032 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 122,495 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 156,321 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.93 | 216,717 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 147,624 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.88 | 68,982 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.83 | 106,080 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 84,934 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 59,901 |
| ALL First-Level Subdivisions of the World With a Map | 0 | - | 5.00 | 130,373 |
| All First-Level Subdivisions of Europe by Proximity | 0 | - | 4.84 | 72,191 |
| Top World Languages on a Map | 0 | - | 4.92 | 98,482 |
| Official Languages of the World on the Disappearing World Map | 0 | - | 4.98 | 108,522 |
| 407 Islands on the World Map | 0 | - | 4.99 | 31,926 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 43,512 |
| Biggest Countries by Population | 0 | - | 4.99 | 1,383,279 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 365,166 |
| One Border Countries | 0 | - | 4.98 | 445,611 |
| Countries of Europe in 1000 with a Map | 0 | - | 4.74 | 40,139 |
