| Independence from Whom | 0 | - | 4.99 | 209,570 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 130,652 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 61,966 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 92,688 |
| Countries by Founding Story | 0 | - | 4.95 | 76,479 |
| Countries of the World Quiz | 0 | - | 5.00 | 46,881,161 |
| Recently Independent Countries | 0 | - | 4.98 | 157,919 |
| Countries of the World in 1900 | 0 | - | 4.89 | 83,397 |
| Countries of the World in 1914 with a Map | 0 | - | 4.99 | 193,019 |
| Countries of the World in 1945 with a Map | 0 | - | 5.00 | 148,702 |
| Countries by Former Name | 0 | - | 4.99 | 124,212 |
| Historical City to Country | 0 | - | 4.84 | 78,107 |
| Landlocked Countries | 0 | - | 4.99 | 413,177 |
| Most Populous Countries by Year | 0 | - | 4.83 | 109,120 |
| First Countries to Reach 5 Million People | 0 | - | 4.92 | 134,221 |
| Most Populous Modern-Day Countries in 1000 AD | 0 | - | 4.87 | 75,204 |
| Most Populous Modern-Day Countries in 1 AD | 0 | - | 4.97 | 83,555 |
| Most Populous Modern-Day Countries in 1800 AD | 0 | - | 4.93 | 66,520 |
| Most Populous Modern-Day Countries in 1500 AD | 0 | - | 4.93 | 72,754 |
| Most Populous Modern-Day Countries by Century | 0 | - | 4.98 | 96,149 |
| Former Capitals | 0 | - | 4.88 | 71,114 |
| Countries Settled by Vikings | 0 | - | 4.93 | 120,799 |
| Warsaw Pact Countries | 0 | - | 4.83 | 84,251 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 67,241 |
| Countries of Europe in 1444 | 0 | - | 4.92 | 98,651 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,712,653 |
| Sahara Desert Countries | 0 | - | 4.98 | 160,391 |
| Himalayan Countries | 0 | - | 4.95 | 135,167 |
| Andean Countries | 0 | - | 4.94 | 82,735 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 62,152 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 123,082 |
| Coffee Producing Countries | 0 | - | 4.81 | 65,822 |
| Countries with Shrinking Populations | 0 | - | 4.93 | 64,517 |
| Countries in World War I | 0 | - | 4.88 | 226,514 |
| Danube Countries | 0 | - | 4.97 | 71,033 |
| Countries With an "Ish" Demonym | 0 | - | 4.98 | 115,698 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 85,489 |
| Countries with the Worst Passports | 0 | - | 4.94 | 82,368 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 147,286 |
| European Landlocked Countries | 0 | - | 4.99 | 145,701 |
| Partially Recognized Countries | 0 | - | 4.98 | 105,115 |
| Countries with the Most Species | 0 | - | 4.99 | 95,216 |
| Axis Occupied Countries of WWII | 0 | - | 4.99 | 227,318 |
| Countries 197 to 205 | 0 | - | 4.89 | 69,267 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,190 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,352 |
| Countries that Use the Peso | 0 | - | 4.87 | 58,928 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.89 | 72,542 |
| Countries with a AAA Credit Rating | 0 | - | 4.85 | 56,904 |
| Countries in the Alps | 0 | - | 4.87 | 116,749 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 94,515 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 105,162 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 77,975 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 95,371 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 115,101 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.91 | 94,959 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 99,513 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 52,716 |
| Largest Country by Body of Water | 0 | - | 4.96 | 56,912 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,009 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,179 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,014 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,400 |
| Arctic Ocean Countries | 0 | - | 4.95 | 78,704 |
| Countries with the Most Grassland | 0 | - | 4.93 | 76,712 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 116,964 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 67,596 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,223 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 44,723 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 239,018 |
| World Countries - Blind Typing | 0 | - | 5.00 | 105,480 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 47,568 |
| Largest Countries By Category | 0 | - | 4.97 | 156,680 |
| Countries by Countries | 0 | - | 4.96 | 62,214 |
| Country Flags with the Most White | 0 | - | 4.87 | 137,304 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 61,948 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,311 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 87,710 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 323,364 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 371,969 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 401,379 |
| Island Countries | 0 | - | 4.99 | 707,405 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,038,844 |
| Northernmost Countries | 0 | - | 4.99 | 357,457 |
| Countries of South America | 0 | - | 5.00 | 913,965 |
| Countries of Oceania | 0 | - | 5.00 | 1,039,334 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,846,552 |
| "Land" Countries | 0 | - | 4.98 | 333,513 |
| Most Populous Countries in 1900 | 0 | - | 4.91 | 172,534 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,361,005 |
| Flags of Countries of the World in 1910 | 0 | - | 4.96 | 77,975 |
| Battle to Country | 0 | - | 4.91 | 52,475 |
| Countries by Independence Day | 0 | - | 4.56 | 52,592 |
| Former Countries by Capital | 0 | - | 4.45 | 127,003 |
| Former Countries | 0 | - | 4.75 | 132,636 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 170,963 |
| Countries with Megacities | 0 | - | 4.99 | 246,438 |
| Most Populous Countries in 1950 | 0 | - | 4.63 | 85,699 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 196,879 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 111,777 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 135,342 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 79,735 |
| Countries by Official Language | 0 | - | 4.95 | 192,670 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 292,994 |
| Countries in their Native Language | 0 | - | 4.99 | 196,538 |
| Subdivisions by Country | 0 | - | 4.86 | 50,043 |
| Megadiverse Countries | 0 | - | 4.97 | 133,852 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 129,713 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 54,899 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,398 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 74,847 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 161,585 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 114,708 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,102 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,197 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 44,729 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 75,464 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,387 |
| Countries Furthest from the United States | 0 | - | 4.94 | 88,460 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,477 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 74,640 |
| Most Dispersed Island Nations | 0 | - | 4.96 | 70,997 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 108,425 |
| World Map Quiz | 0 | - | 4.81 | 63,424 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 152,406 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 106,270 |
| Communist Countries in History | 0 | - | 4.63 | 492,275 |
| Southernmost Countries of the World | 0 | - | 4.99 | 226,234 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 103,924 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 121,890 |
| Countries With the Most Languages | 0 | - | 4.90 | 199,594 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 109,809 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.89 | 93,010 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,215 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 60,906 |
| Tallest Countries North to South | 0 | - | 4.83 | 119,292 |
| Widest Countries East to West | 0 | - | 4.92 | 128,558 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,204 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 185,148 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 97,540 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 93,653 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 147,566 |
| Countries with the Most Desert | 0 | - | 4.93 | 126,987 |
| Countries by Contribution to UN Budget | 0 | - | 4.86 | 69,042 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.84 | 34,557 |
| Countries with Double Letters | 0 | - | 4.97 | 93,288 |
| Countries that End in N | 0 | - | 4.94 | 156,347 |
| Countries with Five Letters Quiz | 0 | - | 4.96 | 258,571 |
| Countries with Six Letters | 0 | - | 4.93 | 210,260 |
| Countries with W | 0 | - | 4.97 | 158,157 |
| Countries with Z | 0 | - | 4.98 | 287,738 |
| Countries with Letters Missing | 0 | - | 4.97 | 184,474 |
| Countries That End in U | 0 | - | 4.95 | 119,477 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 132,441 |
| Countries that End in O | 0 | - | 4.92 | 158,506 |
| Countries that End in R | 0 | - | 4.87 | 118,239 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 154,834 |
| Countries Ending in "IA" | 0 | - | 4.99 | 206,925 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 169,240 |
| Countries by Last Two Letters | 0 | - | 4.85 | 134,426 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 140,758 |
| Countries That End in Y | 0 | - | 4.90 | 185,176 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 196,262 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 151,598 |
| Countries that End in I | 0 | - | 4.94 | 134,359 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 182,097 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,165 |
| Countries That End in NIA | 0 | - | 4.92 | 108,957 |
| Countries That End in BIA | 0 | - | 4.92 | 147,652 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,007 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 118,439 |
| Countries That End in RIA | 0 | - | 4.93 | 126,044 |
| Most Common Words in Official Country Names | 0 | - | 4.85 | 109,960 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 225,080 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 132,476 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 124,854 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 90,301 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 73,903 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,068 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 102,596 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 124,444 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 48,792 |
| Countries with the Word "And" | 0 | - | 4.99 | 116,066 |
| Countries Containing Two or More Words | 0 | - | 4.96 | 52,744 |
| Countries that End in L | 0 | - | 4.94 | 155,679 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 210,913 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 84,973 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,483 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,261 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,395 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 246,595 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 199,014 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 125,872 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 162,115 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.93 | 223,306 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 151,470 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 70,589 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.81 | 108,157 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,405 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,280 |
