| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,184,516 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 87,039 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 119,124 |
| Countries within the Arctic Circle - Map Quiz | 0 | - | 4.86 | 53,647 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,123,430 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,477,462 |
| Landlocked Countries Quiz | 0 | - | 4.99 | 335,525 |
| Countries of the World Quiz | 0 | - | 5.00 | 41,859,439 |
| Countries of the World in 1900 | 0 | - | 4.88 | 68,741 |
| Countries of the World in 1914 with a Map | 0 | - | 4.99 | 173,987 |
| All Countries by Northernmost Point on Land | 0 | - | 4.91 | 109,375 |
| 20 Countries on an Empty Map #1 | 0 | - | 4.95 | 55,498 |
| Countries of the World in 1945 with a Map | 0 | - | 5.00 | 131,120 |
| Members of the Arab League | 0 | - | 4.86 | 66,705 |
| Sahara Desert Countries | 0 | - | 4.97 | 130,837 |
| Himalayan Countries | 0 | - | 4.94 | 108,770 |
| Andean Countries | 0 | - | 4.91 | 60,423 |
| Countries with the Oldest Median Age | 0 | - | 4.82 | 61,625 |
| Countries with the Youngest Median Age | 0 | - | 4.98 | 51,022 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 104,652 |
| Coffee Producing Countries | 0 | - | 4.82 | 54,941 |
| Countries with Shrinking Populations | 0 | - | 4.93 | 54,395 |
| Danube Countries | 0 | - | 4.96 | 57,303 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 92,301 |
| Countries With an "Ese" Demonym | 0 | - | 4.96 | 65,361 |
| Countries with the Best Passports | 0 | - | 4.86 | 72,879 |
| Countries with the Worst Passports | 0 | - | 4.89 | 50,540 |
| Countries with the Most Immigrants | 0 | - | 4.87 | 111,215 |
| European Landlocked Countries | 0 | - | 4.99 | 137,305 |
| Partially Recognized Countries | 0 | - | 4.98 | 90,961 |
| Countries with the Most Species | 0 | - | 4.99 | 90,105 |
| Countries 197 to 205 | 0 | - | 4.87 | 57,489 |
| Tropic of Cancer Countries | 0 | - | 4.96 | 45,070 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 44,367 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 49,163 |
| Countries that Use the Peso | 0 | - | 4.82 | 46,956 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.88 | 59,183 |
| Countries with a AAA Credit Rating | 0 | - | 4.87 | 50,023 |
| Countries in the Alps | 0 | - | 4.84 | 104,023 |
| Top Five Importing Partners by Country | 0 | - | 4.98 | 86,588 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 89,858 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 72,393 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 79,492 |
| Northernmost Countries by Continent | 0 | - | 4.97 | 95,017 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.91 | 88,450 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 90,665 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 46,840 |
| Biggest Country by Body of Water | 0 | - | 4.96 | 45,757 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 55,506 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.88 | 70,270 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 49,087 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 37,075 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 96,685 |
| Arctic Ocean Countries | 0 | - | 4.93 | 72,774 |
| Countries with the Most Grassland | 0 | - | 4.94 | 70,349 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 100,881 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 62,049 |
| Countries that Host the Most Refugees | 0 | - | 4.94 | 54,139 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 203,451 |
| World Countries - Blind Typing | 0 | - | 5.00 | 75,779 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 42,914 |
| Largest Countries By Category | 0 | - | 4.97 | 146,618 |
| Countries by Countries | 0 | - | 4.95 | 55,733 |
| Country Flags with the Most White | 0 | - | 4.91 | 126,773 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 59,275 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 45,195 |
| All Countries by Population With a Map | 0 | - | 4.99 | 65,459 |
| Six Degrees of Separation - Countries #1 | 0 | - | 4.96 | 78,154 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 79,803 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,237,675 |
| Pixelated World Map | 0 | - | 5.00 | 130,803 |
| Countries of Europe in 1444 | 0 | - | 4.93 | 88,879 |
| Countries of the World in 1444 | 0 | - | 4.98 | 51,232 |
| Modern-Day Countries of the Inca Empire on a Map | 0 | - | 4.81 | 50,644 |
| Countries of the World with a Borderless Map | 0 | - | 4.99 | 71,831 |
| Spanish-Speaking Countries | 0 | - | 4.94 | 345,629 |
| Countries with the Most Tourists Quiz | 0 | - | 4.91 | 363,520 |
| Island Countries Quiz | 0 | - | 4.99 | 669,608 |
| Biggest Countries by Area | 0 | - | 5.00 | 949,225 |
| Northernmost Countries | 0 | - | 4.99 | 331,266 |
| Countries of South America | 0 | - | 5.00 | 811,978 |
| Countries of Oceania | 0 | - | 5.00 | 916,017 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,615,899 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 129,372 |
| Countries with Megacities | 0 | - | 4.99 | 202,295 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 175,743 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.97 | 100,156 |
| Countries With More than 200 Million People | 0 | - | 4.94 | 98,534 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.97 | 66,120 |
| Top 50 Countries by Population - In Order | 0 | - | 4.97 | 253,656 |
| Global Cities on a World Map | 0 | - | 4.92 | 93,055 |
| Countries by Official Language | 0 | - | 4.96 | 175,504 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.92 | 253,972 |
| Countries in their Native Language | 0 | - | 4.98 | 180,856 |
| Independence from Whom | 0 | - | 4.99 | 189,749 |
| Subdivisions by Country | 0 | - | 4.85 | 46,959 |
| Who Controlled These Colonies? | 0 | - | 4.89 | 115,908 |
| Megadiverse Countries | 0 | - | 4.96 | 126,909 |
| Countries With the Most English Speakers | 0 | - | 4.87 | 94,169 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 107,697 |
| Most Desired Destinations for Potential Migrants | 0 | - | 4.82 | 47,876 |
| 15 Biggest Island Countries | 0 | - | 4.99 | 133,520 |
| Most Recently-Settled Countries | 0 | - | 4.92 | 49,986 |
| Countries of the World in 1938 Quiz | 0 | - | 4.96 | 79,830 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.95 | 146,119 |
| Countries with Multiple Populous Islands | 0 | - | 4.91 | 77,788 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 41,895 |
| Countries by Sports League Revenue | 0 | - | 4.89 | 45,260 |
| Landmarks of Countries #1 | 0 | - | 4.89 | 102,349 |
| Countries Furthest from the United States | 0 | - | 4.94 | 73,048 |
| Countries with the Highest HDI | 0 | - | 4.95 | 131,587 |
| Straight Shot to the Arctic Circle | 0 | - | 4.92 | 69,483 |
| Most Dispersed Island Nations | 0 | - | 4.96 | 66,107 |
| Mediterranean Countries with an Empty Map | 0 | - | 4.99 | 86,542 |
| World Map Quiz | 0 | - | 4.90 | 51,722 |
| Smallest Countries with at Least One Border | 0 | - | 4.90 | 82,865 |
| Countries by Founding Story | 0 | - | 4.93 | 56,027 |
| Countries by Road Signs | 0 | - | 4.98 | 46,402 |
| Southernmost Countries of the World | 0 | - | 4.99 | 210,037 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 92,995 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 110,376 |
| Countries With the Most Languages | 0 | - | 4.90 | 178,161 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.93 | 88,805 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.86 | 73,225 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 88,463 |
| Countries with the Most Domestic Camels | 0 | - | 4.92 | 55,207 |
| Tallest Countries North to South | 0 | - | 4.84 | 111,714 |
| Widest Countries East to West | 0 | - | 4.93 | 120,682 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 69,156 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 160,733 |
| Countries with the Longest Perimeter | 0 | - | 4.81 | 72,931 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 93,482 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 86,969 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 120,779 |
| Countries with the Most Desert | 0 | - | 4.92 | 106,629 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 66,834 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 32,453 |
| Countries with Double Letters | 0 | - | 4.96 | 72,657 |
| Countries that End in N | 0 | - | 4.93 | 136,904 |
| Countries with Five Letters Quiz | 0 | - | 4.97 | 234,668 |
| Countries with Six Letters Quiz | 0 | - | 4.95 | 191,209 |
| Countries with W | 0 | - | 4.97 | 126,301 |
| Countries with Z | 0 | - | 4.98 | 265,363 |
| Countries with Letters Missing | 0 | - | 4.97 | 170,156 |
| Countries That End in U | 0 | - | 4.95 | 109,878 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 92,973 |
| Countries that End in O | 0 | - | 4.92 | 148,977 |
| Countries that End in R | 0 | - | 4.85 | 97,531 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 148,478 |
| Countries Ending in "IA" | 0 | - | 4.99 | 174,603 |
| Countries by First and Last Letter #1 | 0 | - | 4.98 | 157,951 |
| Countries by Last Two Letters | 0 | - | 4.89 | 117,874 |
| Countries by First and Last Letter #2 | 0 | - | 4.95 | 130,814 |
| Countries That End in Y | 0 | - | 4.92 | 177,970 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 163,231 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.91 | 122,782 |
| Countries that End in I | 0 | - | 4.92 | 115,337 |
| Countries Based on First Two Letters #2 | 0 | - | 4.98 | 151,862 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 89,516 |
| Countries That End in NIA | 0 | - | 4.92 | 101,953 |
| Countries That End in BIA | 0 | - | 4.91 | 127,494 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 155,366 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 111,108 |
| Countries That End in RIA | 0 | - | 4.90 | 102,032 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 101,939 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 205,212 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 121,914 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 113,062 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 4.99 | 79,555 |
| Countries With One Word and Three A's | 0 | - | 4.93 | 43,089 |
| Countries with a Unique Last Letter | 0 | - | 4.91 | 93,975 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 98,333 |
| Countries that are Free from U.S.A. | 0 | - | 4.90 | 43,803 |
| Countries with the Word "And" | 0 | - | 4.98 | 85,248 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 42,700 |
| Countries that End in L | 0 | - | 4.95 | 136,027 |
| "Land" Countries | 0 | - | 4.98 | 292,610 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 191,473 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 82,951 |
| City to Country Quiz #1 | 0 | - | 4.95 | 135,485 |
| City to Country Quiz #3 | 0 | - | 4.87 | 101,157 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 72,749 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 211,374 |
| Five Poorest Countries by Continent | 0 | - | 4.94 | 171,235 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 117,975 |
| Five Smallest Countries by Continent | 0 | - | 4.97 | 135,094 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.93 | 196,670 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 142,723 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 66,686 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.84 | 103,414 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 83,352 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.93 | 57,478 |
| All First-Level Subdivisions of Europe by Proximity | 0 | - | 4.83 | 67,843 |
| Top World Languages on a Map | 0 | - | 4.91 | 94,292 |
| Official Languages of the World on the Disappearing World Map | 0 | - | 4.99 | 100,911 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 40,682 |
| Biggest Countries by Population | 0 | - | 4.99 | 1,330,898 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 353,802 |
| One Border Countries | 0 | - | 4.98 | 416,341 |
| Countries of Europe in 1000 with a Map | 0 | - | 4.80 | 37,188 |
