| Countries of the World Quiz | 0 | - | 5.00 | 45,905,873 |
| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.97 | 108,880 |
| Landlocked Countries Quiz | 0 | - | 4.99 | 401,865 |
| Countries with the Most HIV | 0 | - | 4.46 | 44,096 |
| Countries with the Most Malaria Deaths | 0 | - | 4.47 | 44,087 |
| Most Populous Countries by Year | 0 | - | 4.83 | 106,916 |
| Countries with Glaciers | 0 | - | 4.97 | 103,486 |
| Countries with the Most Forest | 0 | - | 4.87 | 145,286 |
| Countries with the Most Billionaires | 0 | - | 4.90 | 328,912 |
| Countries Reducing Carbon Dioxide Emissions the Most | 0 | - | 4.89 | 63,250 |
| Countries with the Most Millionaires | 0 | - | 4.86 | 119,372 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,625,554 |
| Sahara Desert Countries | 0 | - | 4.98 | 155,116 |
| Himalayan Countries | 0 | - | 4.95 | 130,602 |
| Andean Countries | 0 | - | 4.94 | 79,778 |
| Countries with the Youngest Median Age | 0 | - | 4.98 | 60,244 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 119,558 |
| Coffee Producing Countries | 0 | - | 4.81 | 63,689 |
| Countries with Shrinking Populations | 0 | - | 4.93 | 62,741 |
| Danube Countries | 0 | - | 4.97 | 63,138 |
| Countries With an "Ish" Demonym | 0 | - | 4.98 | 99,998 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 84,107 |
| Countries with the Worst Passports | 0 | - | 4.93 | 79,829 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 144,370 |
| European Landlocked Countries | 0 | - | 4.99 | 143,945 |
| Partially Recognized Countries | 0 | - | 4.98 | 102,765 |
| Countries with the Most Species | 0 | - | 4.99 | 94,114 |
| Countries 197 to 205 | 0 | - | 4.88 | 67,175 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 52,664 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 46,851 |
| Countries that Use the Peso | 0 | - | 4.87 | 57,999 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.88 | 71,598 |
| Countries with a AAA Credit Rating | 0 | - | 4.85 | 55,774 |
| Countries in the Alps | 0 | - | 4.87 | 114,671 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 93,156 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 102,497 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 77,099 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 93,773 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 113,609 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.90 | 93,828 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 97,755 |
| Five Biggest Countries by Longitude | 0 | - | 4.90 | 51,697 |
| Largest Country by Body of Water | 0 | - | 4.96 | 49,458 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 60,828 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 52,542 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 40,337 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 102,247 |
| Arctic Ocean Countries | 0 | - | 4.95 | 77,703 |
| Countries with the Most Grassland | 0 | - | 4.93 | 75,636 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 114,061 |
| Countries with the Most Climate Zones | 0 | - | 4.95 | 66,578 |
| Countries that Host the Most Refugees | 0 | - | 4.94 | 58,341 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 42,661 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 232,753 |
| World Countries - Blind Typing | 0 | - | 5.00 | 101,801 |
| Countries in Their Own Alphabet | 0 | - | 4.96 | 46,692 |
| Largest Countries By Category | 0 | - | 4.97 | 154,643 |
| Countries by Countries | 0 | - | 4.96 | 60,836 |
| Country Flags with the Most White | 0 | - | 4.87 | 135,358 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 61,487 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 46,953 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 86,327 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 367,824 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 393,503 |
| Island Countries Quiz | 0 | - | 4.99 | 702,440 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,022,043 |
| Northernmost Countries | 0 | - | 4.99 | 349,727 |
| Countries with the Longest Coastlines | 0 | - | 4.81 | 408,154 |
| Countries of South America | 0 | - | 5.00 | 895,859 |
| Countries of Oceania | 0 | - | 5.00 | 1,016,354 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,803,331 |
| Most Populous Countries in 1900 | 0 | - | 4.91 | 170,923 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,329,035 |
| Countries that Catch the Most Fish | 0 | - | 4.89 | 110,154 |
| Countries with the Most Muslims | 0 | - | 4.94 | 157,231 |
| Countries with the Most Exports | 0 | - | 4.96 | 152,286 |
| Top Crude Oil Producing Countries | 0 | - | 4.89 | 186,197 |
| Countries by Oil Consumption | 0 | - | 4.96 | 118,591 |
| Largest Economies in 2050 | 0 | - | 4.90 | 109,491 |
| Richest Countries by Per-Capita GDP | 0 | - | 4.96 | 256,071 |
| Countries With Highest GDP as a Percent of Continent | 0 | - | 4.96 | 101,357 |
| Countries with the Highest GDP per Square Kilometer | 0 | - | 4.90 | 82,377 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 167,108 |
| Countries with Megacities | 0 | - | 4.99 | 228,023 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 193,323 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 109,802 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 132,112 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.97 | 77,417 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 313,091 |
| Countries by Official Language | 0 | - | 4.95 | 189,532 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 289,199 |
| Countries in their Native Language | 0 | - | 4.99 | 193,485 |
| Independence from Whom | 0 | - | 4.99 | 206,039 |
| Subdivisions by Country | 0 | - | 4.86 | 49,531 |
| Who Controlled These Colonies? | 0 | - | 4.90 | 128,011 |
| Megadiverse Countries | 0 | - | 4.97 | 132,895 |
| Countries With the Most English Speakers | 0 | - | 4.88 | 127,256 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 54,315 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 123,737 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 74,425 |
| Most Desired Destinations for Potential Migrants | 0 | - | 4.86 | 49,998 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 159,250 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 61,091 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 90,730 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.94 | 151,874 |
| Countries with Multiple Populous Islands | 0 | - | 4.88 | 93,282 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 44,258 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 72,759 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 106,112 |
| Countries Furthest from the United States | 0 | - | 4.94 | 87,624 |
| Countries with the Highest HDI | 0 | - | 4.95 | 135,760 |
| Straight Shot to the Arctic Circle | 0 | - | 4.87 | 73,823 |
| Most Dispersed Island Nations | 0 | - | 4.96 | 70,087 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 104,833 |
| World Map Quiz | 0 | - | 4.84 | 61,366 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 146,312 |
| Smallest Countries with at Least One Border | 0 | - | 4.88 | 104,244 |
| Countries by Founding Story | 0 | - | 4.95 | 75,203 |
| Southernmost Countries of the World | 0 | - | 4.99 | 223,547 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 102,276 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 120,132 |
| Countries With the Most Languages | 0 | - | 4.89 | 195,874 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 108,206 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.89 | 91,660 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 96,878 |
| Countries with the Most Domestic Camels | 0 | - | 4.93 | 60,064 |
| Tallest Countries North to South | 0 | - | 4.83 | 118,163 |
| Widest Countries East to West | 0 | - | 4.92 | 127,192 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 70,866 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 183,560 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 96,802 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 92,552 |
| Largest Countries as a Percent of Continent | 0 | - | 4.98 | 146,018 |
| Countries with the Most Desert | 0 | - | 4.93 | 125,679 |
| Countries by Contribution to UN Budget | 0 | - | 4.85 | 68,717 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.84 | 34,274 |
| Countries with Double Letters | 0 | - | 4.97 | 89,396 |
| Countries that End in N | 0 | - | 4.93 | 152,576 |
| Countries with Five Letters Quiz | 0 | - | 4.96 | 254,057 |
| Countries with Six Letters Quiz | 0 | - | 4.93 | 206,649 |
| Countries with W | 0 | - | 4.97 | 155,004 |
| Countries with Z | 0 | - | 4.98 | 283,004 |
| Countries with Letters Missing | 0 | - | 4.97 | 181,549 |
| Countries That End in U | 0 | - | 4.95 | 117,634 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 105,805 |
| Countries that End in O | 0 | - | 4.92 | 156,964 |
| Countries that End in R | 0 | - | 4.84 | 101,614 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 153,926 |
| Countries Ending in "IA" | 0 | - | 4.99 | 204,104 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 167,110 |
| Countries by Last Two Letters | 0 | - | 4.87 | 133,104 |
| Countries by First and Last Letter #2 | 0 | - | 4.95 | 139,022 |
| Countries That End in Y | 0 | - | 4.91 | 184,057 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 194,037 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 149,766 |
| Countries that End in I | 0 | - | 4.93 | 118,804 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 179,835 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 94,190 |
| Countries That End in NIA | 0 | - | 4.92 | 107,777 |
| Countries That End in BIA | 0 | - | 4.92 | 146,120 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 164,028 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 117,101 |
| Countries That End in RIA | 0 | - | 4.92 | 124,810 |
| Most Common Words in Official Country Names | 0 | - | 4.85 | 108,538 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 221,695 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 130,579 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 122,784 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 4.99 | 88,425 |
| Add A Letter - Make a Country | 0 | - | 4.81 | 72,978 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 50,824 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 100,966 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.97 | 122,830 |
| Countries that are Free from U.S.A. | 0 | - | 4.88 | 47,932 |
| Countries with the Word "And" | 0 | - | 4.99 | 114,272 |
| Countries Containing Two or More Words | 0 | - | 4.96 | 50,950 |
| Countries that End in L | 0 | - | 4.94 | 154,264 |
| "Land" Countries | 0 | - | 4.98 | 303,945 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 202,647 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 84,573 |
| City to Country Quiz #1 | 0 | - | 4.97 | 153,665 |
| City to Country Quiz #3 | 0 | - | 4.88 | 107,641 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 77,341 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 224,701 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 196,670 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 124,311 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 160,130 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.93 | 220,339 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 149,741 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.88 | 69,896 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.83 | 107,202 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 85,701 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 61,165 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,412,133 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 371,452 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,727,148 |
| One Border Countries | 0 | - | 4.98 | 454,585 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,522,175 |
| Countries that Desalinate the Most Water | 0 | - | 4.77 | 40,584 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.95 | 84,278 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 262,292 |
