| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,012,916 |
| Countries of the World in Alphabetical Order | 0 | - | 4.99 | 79,886 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 110,320 |
| Countries within the Arctic Circle - Map Quiz | 0 | - | 4.85 | 50,743 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,032,483 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,352,861 |
| Landlocked Countries Quiz | 0 | - | 4.99 | 316,937 |
| Countries of the World Quiz | 0 | - | 5.00 | 40,417,668 |
| Countries of the World in 1900 | 0 | - | 4.88 | 64,737 |
| Countries of the World in 1914 with a Map | 0 | - | 4.99 | 168,518 |
| All Countries by Northernmost Point on Land | 0 | - | 4.91 | 105,011 |
| 20 Countries on an Empty Map #1 | 0 | - | 4.94 | 53,436 |
| Countries of the World in 1945 with a Map | 0 | - | 5.00 | 125,993 |
| Countries on the Equator | 0 | - | 4.82 | 132,146 |
| Members of the Arab League | 0 | - | 4.81 | 59,022 |
| Sahara Desert Countries | 0 | - | 4.97 | 125,008 |
| Himalayan Countries | 0 | - | 4.95 | 102,313 |
| Andean Countries | 0 | - | 4.90 | 56,833 |
| Countries with the Oldest Median Age | 0 | - | 4.85 | 57,672 |
| Countries with the Youngest Median Age | 0 | - | 4.98 | 48,531 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 101,837 |
| Coffee Producing Countries | 0 | - | 4.82 | 53,506 |
| Countries with Shrinking Populations | 0 | - | 4.93 | 52,683 |
| Danube Countries | 0 | - | 4.97 | 56,337 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 91,368 |
| Countries With an "Ese" Demonym | 0 | - | 4.96 | 64,579 |
| Countries with the Best Passports | 0 | - | 4.86 | 70,241 |
| Countries with the Worst Passports | 0 | - | 4.86 | 48,731 |
| Countries with the Most Immigrants | 0 | - | 4.87 | 108,334 |
| European Landlocked Countries | 0 | - | 4.99 | 114,811 |
| Partially Recognized Countries | 0 | - | 4.98 | 88,709 |
| Countries with the Most Species | 0 | - | 4.99 | 89,076 |
| Countries 197 to 205 | 0 | - | 4.87 | 55,758 |
| Tropic of Cancer Countries | 0 | - | 4.96 | 44,421 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 43,791 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 47,725 |
| Countries that Use the Peso | 0 | - | 4.81 | 46,091 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.87 | 58,433 |
| Countries with a AAA Credit Rating | 0 | - | 4.89 | 48,635 |
| Countries in the Alps | 0 | - | 4.82 | 101,745 |
| Top Five Importing Partners by Country | 0 | - | 4.98 | 84,560 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 85,675 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 71,091 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 77,664 |
| Northernmost Countries by Continent | 0 | - | 4.97 | 93,307 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.91 | 86,816 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 88,998 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 45,720 |
| Biggest Country by Body of Water | 0 | - | 4.96 | 45,046 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 54,100 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.88 | 68,868 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 48,316 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 36,387 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 94,911 |
| Arctic Ocean Countries | 0 | - | 4.93 | 71,456 |
| Countries with the Most Grassland | 0 | - | 4.93 | 68,923 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 96,475 |
| Countries with the Most Climate Zones | 0 | - | 4.97 | 60,919 |
| Countries that Host the Most Refugees | 0 | - | 4.93 | 52,915 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 192,427 |
| World Countries - Blind Typing | 0 | - | 5.00 | 71,204 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 41,917 |
| Largest Countries By Category | 0 | - | 4.96 | 143,799 |
| Countries by Countries | 0 | - | 4.96 | 54,014 |
| Country Flags with the Most White | 0 | - | 4.90 | 107,570 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 58,341 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.86 | 44,415 |
| All Countries by Population With a Map | 0 | - | 4.98 | 60,486 |
| Six Degrees of Separation - Countries #1 | 0 | - | 4.96 | 75,890 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 77,253 |
| Pixelated World Map | 0 | - | 5.00 | 126,833 |
| Countries of Europe in 1444 | 0 | - | 4.92 | 85,946 |
| Countries of the World with a Borderless Map | 0 | - | 4.99 | 68,564 |
| Spanish-Speaking Countries | 0 | - | 4.94 | 338,335 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 351,392 |
| Island Countries Quiz | 0 | - | 4.99 | 637,899 |
| Biggest Countries by Area | 0 | - | 5.00 | 923,997 |
| Northernmost Countries | 0 | - | 4.99 | 325,174 |
| Countries of South America | 0 | - | 5.00 | 782,857 |
| Countries of Oceania | 0 | - | 5.00 | 880,945 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,104,483 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,549,470 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 124,005 |
| Countries with Megacities | 0 | - | 4.99 | 194,533 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 169,277 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.97 | 96,766 |
| Countries With More than 200 Million People | 0 | - | 4.93 | 93,564 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.97 | 62,630 |
| Top 50 Countries by Population - In Order | 0 | - | 4.97 | 244,816 |
| Global Cities on a World Map | 0 | - | 4.93 | 90,602 |
| Countries by Official Language | 0 | - | 4.95 | 153,370 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 246,452 |
| Countries in their Native Language | 0 | - | 4.98 | 176,869 |
| Independence from Whom | 0 | - | 4.99 | 182,769 |
| Subdivisions by Country | 0 | - | 4.82 | 46,160 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 111,759 |
| Megadiverse Countries | 0 | - | 4.96 | 124,674 |
| Countries With the Most English Speakers | 0 | - | 4.87 | 89,817 |
| Countries with Multiple Big Islands | 0 | - | 4.92 | 105,958 |
| Most Desired Destinations for Potential Migrants | 0 | - | 4.82 | 47,105 |
| 15 Biggest Island Countries | 0 | - | 4.99 | 129,985 |
| Most Recently-Settled Countries | 0 | - | 4.91 | 48,576 |
| Countries of the World in 1938 Quiz | 0 | - | 4.96 | 76,493 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.95 | 144,260 |
| Countries with Multiple Populous Islands | 0 | - | 4.91 | 76,463 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 40,951 |
| Countries by Sports League Revenue | 0 | - | 4.87 | 42,762 |
| Landmarks of Countries #1 | 0 | - | 4.89 | 100,771 |
| Countries Furthest from the United States | 0 | - | 4.94 | 71,314 |
| Countries with the Highest HDI | 0 | - | 4.95 | 130,459 |
| Straight Shot to the Arctic Circle | 0 | - | 4.92 | 67,879 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 64,699 |
| Mediterranean Countries with an Empty Map | 0 | - | 4.99 | 84,345 |
| World Map Quiz | 0 | - | 4.90 | 48,033 |
| Smallest Countries with at Least One Border | 0 | - | 4.91 | 80,683 |
| Countries by Founding Story | 0 | - | 4.92 | 54,056 |
| Countries by Road Signs | 0 | - | 4.98 | 44,651 |
| Southernmost Countries of the World | 0 | - | 4.99 | 205,211 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 90,039 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.90 | 106,988 |
| Countries With the Most Languages | 0 | - | 4.90 | 171,390 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.92 | 86,513 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.85 | 70,811 |
| Countries with the Most Prisoners | 0 | - | 4.93 | 85,385 |
| Countries with the Most Domestic Camels | 0 | - | 4.92 | 53,244 |
| Tallest Countries North to South | 0 | - | 4.84 | 109,794 |
| Widest Countries East to West | 0 | - | 4.93 | 118,653 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 68,665 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 157,801 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 92,075 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.96 | 84,724 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 117,589 |
| Countries with the Most Desert | 0 | - | 4.92 | 104,456 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 66,237 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 31,841 |
| Countries with Double Letters | 0 | - | 4.96 | 66,500 |
| Countries that End in N | 0 | - | 4.94 | 130,865 |
| Countries with Five Letters Quiz | 0 | - | 4.96 | 227,388 |
| Countries with Six Letters Quiz | 0 | - | 4.95 | 185,247 |
| Countries with W | 0 | - | 4.97 | 121,169 |
| Countries with Z | 0 | - | 4.98 | 241,849 |
| Countries with Letters Missing | 0 | - | 4.97 | 154,325 |
| Countries That End in U | 0 | - | 4.94 | 106,617 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.96 | 88,030 |
| Countries that End in O | 0 | - | 4.92 | 146,242 |
| Countries that End in R | 0 | - | 4.85 | 96,016 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 146,786 |
| Countries Ending in "IA" | 0 | - | 4.99 | 169,380 |
| Countries by First and Last Letter #1 | 0 | - | 4.98 | 154,776 |
| Countries by Last Two Letters | 0 | - | 4.90 | 115,505 |
| Countries by First and Last Letter #2 | 0 | - | 4.95 | 128,432 |
| Countries That End in Y | 0 | - | 4.90 | 160,743 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 159,526 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.91 | 119,725 |
| Countries that End in I | 0 | - | 4.92 | 114,115 |
| Countries Based on First Two Letters #2 | 0 | - | 4.98 | 148,302 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 87,759 |
| Countries That End in NIA | 0 | - | 4.93 | 100,273 |
| Countries That End in BIA | 0 | - | 4.91 | 125,262 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.93 | 152,295 |
| Countries Whose Names Start with Saint | 0 | - | 4.88 | 108,973 |
| Countries That End in RIA | 0 | - | 4.89 | 100,417 |
| Most Common Words in Official Country Names | 0 | - | 4.85 | 99,678 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 198,486 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 118,538 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 109,338 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 4.99 | 76,263 |
| Countries with a Unique Last Letter | 0 | - | 4.91 | 91,470 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 95,830 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 42,321 |
| Countries with the Word "And" | 0 | - | 4.98 | 82,474 |
| Countries Containing Two or More Words | 0 | - | 4.96 | 39,692 |
| Countries that End in L | 0 | - | 4.95 | 133,281 |
| "Land" Countries | 0 | - | 4.98 | 287,754 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 187,670 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.96 | 65,056 |
| City to Country Quiz #1 | 0 | - | 4.94 | 133,654 |
| City to Country Quiz #3 | 0 | - | 4.86 | 99,436 |
| 45 European Countries, 45 Cities | 0 | - | 4.94 | 71,049 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 206,062 |
| Five Poorest Countries by Continent | 0 | - | 4.94 | 156,869 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 115,618 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 131,529 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.92 | 191,875 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 139,887 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.88 | 65,390 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.83 | 91,624 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 81,858 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.93 | 55,347 |
| All First-Level Subdivisions of Europe by Proximity | 0 | - | 4.81 | 65,118 |
| Top World Languages on a Map | 0 | - | 4.91 | 92,358 |
| Official Languages of the World on the Disappearing World Map | 0 | - | 4.99 | 96,977 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 39,296 |
| Biggest Countries by Population | 0 | - | 4.99 | 1,301,232 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 347,384 |
| One Border Countries | 0 | - | 4.98 | 406,352 |
| Countries of Europe in 1000 with a Map | 0 | - | 4.78 | 35,488 |
| Every Country in its Official/Native Language | 0 | - | 4.96 | 16,849 |
| Countries With One Word and Three A's | 0 | - | 4.83 | 30,157 |
| 407 Islands on the World Map | 0 | - | 4.98 | 27,426 |
