| Independence from Whom | 0 | - | 4.99 | 211,812 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 132,281 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,509 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,287 |
| Countries by Founding Story | 0 | - | 4.95 | 77,259 |
| Recently Independent Countries | 0 | - | 4.98 | 159,304 |
| Countries of the World in 1900 | 0 | - | 4.89 | 84,992 |
| Countries of the World in 1914 with a Map | 0 | - | 4.99 | 195,393 |
| Countries of the World in 1945 with a Map | 0 | - | 5.00 | 150,977 |
| Countries by Former Name | 0 | - | 4.99 | 125,179 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,490,655 |
| Landlocked Countries | 0 | - | 4.99 | 420,878 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,770,292 |
| Most Populous Countries by Year | 0 | - | 4.83 | 110,685 |
| First Countries to Reach 5 Million People | 0 | - | 4.92 | 135,340 |
| Most Populous Modern-Day Countries in 1000 AD | 0 | - | 4.88 | 76,218 |
| Most Populous Modern-Day Countries in 1 AD | 0 | - | 4.98 | 92,786 |
| Most Populous Modern-Day Countries in 1800 AD | 0 | - | 4.93 | 67,275 |
| Most Populous Modern-Day Countries in 1500 AD | 0 | - | 4.93 | 73,566 |
| Most Populous Modern-Day Countries by Century | 0 | - | 4.98 | 97,287 |
| Sahara Desert Countries | 0 | - | 4.98 | 163,945 |
| Himalayan Countries | 0 | - | 4.95 | 138,248 |
| Andean Countries | 0 | - | 4.95 | 84,340 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 63,567 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 125,462 |
| Coffee Producing Countries | 0 | - | 4.83 | 67,190 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,612 |
| Danube Countries | 0 | - | 4.97 | 71,880 |
| Countries With an "Ish" Demonym | 0 | - | 4.98 | 116,850 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,281 |
| Countries with the Worst Passports | 0 | - | 4.94 | 84,067 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 149,528 |
| European Landlocked Countries | 0 | - | 4.99 | 147,011 |
| Partially Recognized Countries | 0 | - | 4.98 | 106,438 |
| Countries with the Most Species | 0 | - | 4.99 | 103,131 |
| Countries 197 to 205 | 0 | - | 4.89 | 70,581 |
| Countries Settled by Vikings | 0 | - | 4.93 | 121,659 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,527 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,671 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,465 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,143 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,544 |
| Countries in the Alps | 0 | - | 4.87 | 118,020 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 100,128 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 106,801 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,566 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,492 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,362 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 95,858 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,518 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,380 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,102 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,730 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,578 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,436 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,101 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,374 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,399 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 118,631 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,203 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,717 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 45,865 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 243,379 |
| World Countries - Blind Typing | 0 | - | 5.00 | 107,777 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,135 |
| Largest Countries By Category | 0 | - | 4.97 | 157,992 |
| Countries by Countries | 0 | - | 4.96 | 63,060 |
| Country Flags with the Most White | 0 | - | 4.85 | 138,516 |
| Warsaw Pact Countries | 0 | - | 4.83 | 84,522 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,230 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 69,323 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,524 |
| Countries of Europe in 1444 | 0 | - | 4.92 | 99,820 |
| Modern-Day Countries of the Inca Empire on a Map | 0 | - | 4.83 | 57,471 |
| All Countries by Population With a Map | 0 | - | 4.98 | 109,185 |
| Six Degrees of Separation - Countries #1 | 0 | - | 4.96 | 98,852 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 88,551 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 330,607 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 375,160 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 406,501 |
| Island Countries | 0 | - | 4.99 | 710,587 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,048,387 |
| Northernmost Countries | 0 | - | 4.99 | 361,417 |
| Countries of South America | 0 | - | 5.00 | 925,616 |
| Countries of Oceania | 0 | - | 5.00 | 1,054,754 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,873,242 |
| "Land" Countries | 0 | - | 4.98 | 336,891 |
| Most Populous Countries in 1900 | 0 | - | 4.91 | 173,784 |
| Countries by Independence Day | 0 | - | 4.61 | 52,747 |
| Former Countries by Capital | 0 | - | 4.45 | 127,500 |
| Former Countries | 0 | - | 4.75 | 133,831 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,380,761 |
| Flags of Countries of the World in 1910 | 0 | - | 4.96 | 78,923 |
| Battle to Country | 0 | - | 4.91 | 53,382 |
| Modern-Day Countries of the Umayyad Caliphate on a Map | 0 | - | 4.98 | 68,805 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 173,591 |
| Countries with Megacities | 0 | - | 4.99 | 263,741 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 199,433 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,312 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 137,703 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 81,356 |
| Countries by Official Language | 0 | - | 4.95 | 195,013 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 296,066 |
| Countries in their Native Language | 0 | - | 4.99 | 198,526 |
| Subdivisions by Country | 0 | - | 4.86 | 50,380 |
| Megadiverse Countries | 0 | - | 4.96 | 134,916 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 131,870 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,283 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,863 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,069 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 162,966 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,964 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,588 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,048 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 77,425 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,811 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,124 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,900 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,273 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,432 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 110,826 |
| World Map Quiz | 0 | - | 4.81 | 64,932 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 156,600 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,232 |
| Countries by Road Signs | 0 | - | 4.98 | 53,866 |
| Southernmost Countries of the World | 0 | - | 4.99 | 227,860 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 105,140 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,865 |
| Countries With the Most Languages | 0 | - | 4.90 | 201,885 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,773 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,907 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,203 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,380 |
| Tallest Countries North to South | 0 | - | 4.83 | 120,482 |
| Widest Countries East to West | 0 | - | 4.92 | 129,550 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,423 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 186,228 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,078 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,665 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,452 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,736 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,330 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,774 |
| Countries with Double Letters | 0 | - | 4.97 | 95,850 |
| Countries that End in N | 0 | - | 4.95 | 170,781 |
| Countries with Five Letters | 0 | - | 4.96 | 281,861 |
| Countries with Six Letters | 0 | - | 4.94 | 213,200 |
| Countries with W | 0 | - | 4.97 | 160,061 |
| Countries with Z | 0 | - | 4.98 | 291,048 |
| Countries with Letters Missing | 0 | - | 4.96 | 186,415 |
| Countries That End in U | 0 | - | 4.95 | 120,694 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 134,194 |
| Countries that End in O | 0 | - | 4.92 | 159,406 |
| Countries that End in R | 0 | - | 4.87 | 118,876 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,649 |
| Countries Ending in "IA" | 0 | - | 4.99 | 208,799 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 170,478 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,327 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 142,082 |
| Countries That End in Y | 0 | - | 4.91 | 185,791 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 197,673 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 152,692 |
| Countries that End in I | 0 | - | 4.94 | 135,009 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 183,847 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,734 |
| Countries That End in NIA | 0 | - | 4.92 | 109,679 |
| Countries That End in BIA | 0 | - | 4.93 | 149,058 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,954 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,282 |
| Countries That End in RIA | 0 | - | 4.93 | 126,711 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 110,873 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 227,266 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 133,501 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 125,901 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 91,474 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,484 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,891 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,401 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,385 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,338 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,116 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 53,812 |
| Countries that End in L | 0 | - | 4.94 | 156,720 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 215,044 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,228 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,939 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,864 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,908 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 249,515 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 200,475 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 142,865 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 163,398 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 225,058 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 152,764 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 71,037 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,658 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,785 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,446,320 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 380,474 |
| One Border Countries | 0 | - | 4.98 | 468,847 |
