| Independence from Whom | 0 | - | 4.99 | 199,862 |
| Who Controlled These Colonies? | 0 | - | 4.90 | 123,743 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 59,487 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 86,806 |
| Recently Independent Countries Quiz | 0 | - | 4.98 | 152,258 |
| Countries of the World in 1900 | 0 | - | 4.88 | 76,049 |
| Countries of the World in 1914 with a Map | 0 | - | 4.99 | 183,410 |
| Countries of the World in 1945 with a Map | 0 | - | 5.00 | 139,959 |
| Countries by Former Name | 0 | - | 4.99 | 120,098 |
| Historical City to Country | 0 | - | 4.83 | 75,715 |
| Countries of the World Quiz | 0 | - | 5.00 | 44,303,124 |
| 2016 News Stories - Name the Country | 0 | - | 4.45 | 22,860 |
| Most Populous Countries by Year | 0 | - | 4.81 | 102,723 |
| First Countries to Reach 5 Million People | 0 | - | 4.92 | 130,138 |
| Most Populous Modern-Day Countries in 1000 AD | 0 | - | 4.85 | 72,627 |
| Most Populous Modern-Day Countries in 1 AD | 0 | - | 4.97 | 80,622 |
| Most Populous Modern-Day Countries in 1800 AD | 0 | - | 4.92 | 64,497 |
| Most Populous Modern-Day Countries in 1500 AD | 0 | - | 4.93 | 70,458 |
| Most Populous Modern-Day Countries by Century | 0 | - | 4.98 | 92,592 |
| Countries Settled by Vikings | 0 | - | 4.93 | 116,949 |
| Warsaw Pact Countries | 0 | - | 4.81 | 82,539 |
| Countries of Europe in 1444 | 0 | - | 4.93 | 94,003 |
| Landlocked Countries Quiz | 0 | - | 4.99 | 382,213 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,404,749 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,472,915 |
| Most Populous Countries in 1900 | 0 | - | 4.92 | 168,409 |
| Flags of Countries of the World in 1910 | 0 | - | 4.96 | 74,276 |
| Battle to Country | 0 | - | 4.91 | 48,895 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 360,106 |
| Countries with the Most Tourists Quiz | 0 | - | 4.91 | 382,223 |
| Island Countries Quiz | 0 | - | 4.99 | 690,669 |
| Sahara Desert Countries | 0 | - | 4.97 | 145,376 |
| Himalayan Countries | 0 | - | 4.95 | 122,043 |
| Andean Countries | 0 | - | 4.92 | 68,583 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 56,589 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 112,936 |
| Coffee Producing Countries | 0 | - | 4.83 | 59,813 |
| Countries with Shrinking Populations | 0 | - | 4.92 | 59,218 |
| Danube Countries | 0 | - | 4.97 | 60,792 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 96,789 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 81,840 |
| Countries with the Best Passports | 0 | - | 4.81 | 80,400 |
| Countries with the Worst Passports | 0 | - | 4.92 | 64,660 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 138,063 |
| European Landlocked Countries | 0 | - | 4.99 | 140,969 |
| Partially Recognized Countries | 0 | - | 4.98 | 97,999 |
| Countries with the Most Species | 0 | - | 4.99 | 92,307 |
| Countries 197 to 205 | 0 | - | 4.87 | 63,402 |
| Tropic of Cancer Countries | 0 | - | 4.95 | 46,670 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 45,772 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 52,545 |
| Countries that Use the Peso | 0 | - | 4.88 | 56,314 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.87 | 69,921 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 53,603 |
| Countries in the Alps | 0 | - | 4.86 | 110,379 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 90,658 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 97,717 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 75,354 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 83,687 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 110,588 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.90 | 91,915 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 94,957 |
| Five Biggest Countries by Longitude | 0 | - | 4.90 | 49,807 |
| Biggest Country by Body of Water | 0 | - | 4.95 | 47,938 |
| Countries with the Most Container Port Traffic | 0 | - | 4.91 | 58,743 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 72,701 |
| Bridge and Tunnel Borders | 0 | - | 4.95 | 51,232 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.89 | 39,082 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 100,121 |
| Arctic Ocean Countries | 0 | - | 4.94 | 75,814 |
| Countries with the Most Grassland | 0 | - | 4.93 | 73,478 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 108,908 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 64,765 |
| Countries that Host the Most Refugees | 0 | - | 4.94 | 56,694 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 221,865 |
| World Countries - Blind Typing | 0 | - | 5.00 | 94,976 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 45,067 |
| Largest Countries By Category | 0 | - | 4.97 | 151,295 |
| Countries by Countries | 0 | - | 4.96 | 58,433 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,257,081 |
| Country Flags with the Most White | 0 | - | 4.87 | 132,039 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 60,647 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 83,903 |
| Biggest Countries by Area | 0 | - | 5.00 | 989,519 |
| Northernmost Countries | 0 | - | 4.99 | 342,677 |
| Countries of South America | 0 | - | 5.00 | 862,620 |
| Countries of Oceania | 0 | - | 5.00 | 975,327 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,730,297 |
| Countries by Independence Day | 0 | - | 4.61 | 51,827 |
| Former Countries by Capital | 0 | - | 4.43 | 108,123 |
| Former Countries | 0 | - | 4.74 | 129,426 |
| Guerrillas by Country | 0 | - | 4.44 | 40,066 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 101,884 |
| Biggest Countries by Population | 0 | - | 4.99 | 1,381,489 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 364,802 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 158,847 |
| Countries with Megacities | 0 | - | 4.99 | 218,035 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 186,715 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.97 | 106,240 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 126,659 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.97 | 73,225 |
| Top 50 Countries by Population - In Order | 0 | - | 4.97 | 269,901 |
| Countries by Official Language | 0 | - | 4.95 | 184,084 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 282,071 |
| Countries in their Native Language | 0 | - | 4.98 | 188,866 |
| Subdivisions by Country | 0 | - | 4.86 | 48,525 |
| Megadiverse Countries | 0 | - | 4.96 | 130,498 |
| Countries With the Most English Speakers | 0 | - | 4.89 | 122,154 |
| Countries with Multiple Big Islands | 0 | - | 4.92 | 121,731 |
| Most Desired Destinations for Potential Migrants | 0 | - | 4.82 | 49,327 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 155,463 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.94 | 149,046 |
| Countries with Multiple Populous Islands | 0 | - | 4.91 | 80,425 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 43,420 |
| Countries by Sports League Revenue | 0 | - | 4.93 | 67,453 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 104,869 |
| Countries Furthest from the United States | 0 | - | 4.95 | 85,966 |
| Countries with the Highest HDI | 0 | - | 4.95 | 134,214 |
| Straight Shot to the Arctic Circle | 0 | - | 4.89 | 72,170 |
| Most Dispersed Island Nations | 0 | - | 4.96 | 68,628 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 98,182 |
| Countries in the Ottoman Empire | 0 | - | 4.88 | 70,158 |
| World Map Quiz | 0 | - | 4.88 | 57,693 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 86,744 |
| Southernmost Countries of the World | 0 | - | 4.99 | 218,631 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 98,775 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 116,610 |
| Countries With the Most Languages | 0 | - | 4.89 | 189,292 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.93 | 92,554 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.89 | 88,597 |
| Countries with the Most Prisoners | 0 | - | 4.93 | 93,612 |
| Countries with the Most Domestic Camels | 0 | - | 4.93 | 58,379 |
| Tallest Countries North to South | 0 | - | 4.85 | 115,623 |
| Widest Countries East to West | 0 | - | 4.92 | 124,767 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 70,203 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 179,788 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 95,457 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 90,292 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 125,447 |
| Countries with the Most Desert | 0 | - | 4.93 | 123,361 |
| Countries by Contribution to UN Budget | 0 | - | 4.85 | 68,039 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 33,559 |
| Countries with Double Letters | 0 | - | 4.96 | 82,353 |
| Countries that End in N | 0 | - | 4.93 | 146,253 |
| Countries with Five Letters Quiz | 0 | - | 4.96 | 246,224 |
| Countries with Six Letters Quiz | 0 | - | 4.94 | 200,663 |
| Countries with W | 0 | - | 4.97 | 149,121 |
| Countries with Z | 0 | - | 4.98 | 276,151 |
| Countries with Letters Missing | 0 | - | 4.97 | 176,600 |
| Countries That End in U | 0 | - | 4.95 | 114,403 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 100,672 |
| Countries that End in O | 0 | - | 4.91 | 154,504 |
| Countries that End in R | 0 | - | 4.84 | 99,995 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 151,981 |
| Countries Ending in "IA" | 0 | - | 4.99 | 198,244 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 163,414 |
| Countries by Last Two Letters | 0 | - | 4.87 | 121,911 |
| Countries by First and Last Letter #2 | 0 | - | 4.95 | 135,674 |
| Countries That End in Y | 0 | - | 4.91 | 182,176 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 189,343 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.91 | 127,581 |
| Countries that End in I | 0 | - | 4.92 | 117,487 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 158,484 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 92,254 |
| Countries That End in NIA | 0 | - | 4.92 | 105,171 |
| Countries That End in BIA | 0 | - | 4.92 | 142,811 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 161,339 |
| Countries Whose Names Start with Saint | 0 | - | 4.86 | 114,831 |
| Countries That End in RIA | 0 | - | 4.89 | 105,525 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 105,977 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 215,448 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 127,339 |
| Divided Country Name Puzzle #3 | 0 | - | 4.91 | 119,181 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 4.99 | 85,038 |
| Add A Letter - Make a Country | 0 | - | 4.81 | 71,253 |
| Countries With One Word and Three A's | 0 | - | 4.94 | 48,662 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 98,178 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.97 | 120,073 |
| Countries that are Free from U.S.A. | 0 | - | 4.87 | 46,310 |
| Countries Containing Two or More Words | 0 | - | 4.96 | 47,842 |
| Countries that End in L | 0 | - | 4.94 | 151,857 |
| "Land" Countries | 0 | - | 4.98 | 299,750 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 197,650 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 83,956 |
| City to Country Quiz #1 | 0 | - | 4.96 | 150,614 |
| City to Country Quiz #3 | 0 | - | 4.87 | 104,775 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 75,650 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 219,297 |
| Five Poorest Countries by Continent | 0 | - | 4.94 | 192,455 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 122,115 |
| Five Smallest Countries by Continent | 0 | - | 4.97 | 140,913 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.93 | 216,000 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.97 | 147,212 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.88 | 68,742 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.82 | 105,997 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 84,876 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 59,814 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 78,240 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,631,631 |
| One Border Countries | 0 | - | 4.98 | 445,067 |
