| Landlocked Countries | 0 | - | 4.99 | 422,731 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,642,623 |
| Sahara Desert Countries | 0 | - | 4.98 | 164,897 |
| Himalayan Countries | 0 | - | 4.95 | 139,071 |
| Andean Countries | 0 | - | 4.93 | 84,823 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 64,050 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 126,141 |
| Coffee Producing Countries | 0 | - | 4.83 | 67,629 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,944 |
| Danube Countries | 0 | - | 4.97 | 72,109 |
| Countries With an "Ish" Demonym | 0 | - | 4.98 | 117,143 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,513 |
| Countries with the Worst Passports | 0 | - | 4.93 | 84,477 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 149,970 |
| European Landlocked Countries | 0 | - | 4.99 | 147,246 |
| Partially Recognized Countries | 0 | - | 4.98 | 106,786 |
| Countries with the Most Species | 0 | - | 4.99 | 103,321 |
| Countries 197 to 205 | 0 | - | 4.90 | 70,913 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,635 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,757 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,604 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,332 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,752 |
| Countries in the Alps | 0 | - | 4.87 | 118,327 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 101,612 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 107,216 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,729 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,686 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,598 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 96,008 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,766 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,578 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,230 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,936 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,699 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,578 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,307 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,546 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,612 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 119,080 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,376 |
| Countries that Host the Most Refugees | 0 | - | 4.96 | 64,562 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 46,221 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 244,353 |
| World Countries - Blind Typing | 0 | - | 5.00 | 108,361 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,295 |
| Largest Countries By Category | 0 | - | 4.97 | 158,360 |
| Countries by Countries | 0 | - | 4.96 | 63,328 |
| Country Flags with the Most White | 0 | - | 4.85 | 138,789 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,313 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,588 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 88,759 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,784,090 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 332,292 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 375,740 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 407,797 |
| Island Countries | 0 | - | 4.99 | 711,311 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,050,842 |
| Northernmost Countries | 0 | - | 4.99 | 362,330 |
| Countries of South America | 0 | - | 5.00 | 928,428 |
| Countries of Oceania | 0 | - | 5.00 | 1,058,279 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,879,618 |
| "Land" Countries | 0 | - | 4.98 | 337,561 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 174,124 |
| Countries with Megacities | 0 | - | 4.99 | 265,102 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 199,935 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,602 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 138,203 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 81,671 |
| Countries by Official Language | 0 | - | 4.95 | 195,407 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 296,589 |
| Countries in their Native Language | 0 | - | 4.99 | 199,187 |
| Independence from Whom | 0 | - | 4.99 | 212,285 |
| Subdivisions by Country | 0 | - | 4.87 | 50,467 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 132,863 |
| Megadiverse Countries | 0 | - | 4.96 | 135,076 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 132,218 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,395 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 126,275 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,132 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 163,226 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,643 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,575 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 154,347 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,696 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,173 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 77,850 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,931 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,250 |
| Countries with the Highest HDI | 0 | - | 4.95 | 137,005 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,400 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,534 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,385,588 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 111,440 |
| World Map Quiz | 0 | - | 4.81 | 65,195 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 157,677 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,421 |
| Countries by Founding Story | 0 | - | 4.95 | 77,440 |
| Southernmost Countries of the World | 0 | - | 4.99 | 228,245 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 105,364 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 123,078 |
| Countries With the Most Languages | 0 | - | 4.90 | 202,464 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,977 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 94,087 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,367 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,485 |
| Tallest Countries North to South | 0 | - | 4.83 | 120,627 |
| Widest Countries East to West | 0 | - | 4.92 | 129,723 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,475 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 186,470 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,150 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,819 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,664 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,943 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,399 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,815 |
| Countries with Double Letters | 0 | - | 4.96 | 96,414 |
| Countries that End in N | 0 | - | 4.95 | 171,294 |
| Countries with Five Letters | 0 | - | 4.96 | 282,793 |
| Countries with Six Letters | 0 | - | 4.94 | 213,737 |
| Countries with W | 0 | - | 4.97 | 160,454 |
| Countries with Z | 0 | - | 4.98 | 291,649 |
| Countries with Letters Missing | 0 | - | 4.96 | 186,820 |
| Countries That End in U | 0 | - | 4.95 | 120,910 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 134,584 |
| Countries that End in O | 0 | - | 4.92 | 159,567 |
| Countries that End in R | 0 | - | 4.87 | 119,005 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,767 |
| Countries Ending in "IA" | 0 | - | 4.99 | 209,257 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 170,773 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,544 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 142,462 |
| Countries That End in Y | 0 | - | 4.91 | 185,925 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 198,020 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 152,942 |
| Countries that End in I | 0 | - | 4.94 | 135,141 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 184,204 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,863 |
| Countries That End in NIA | 0 | - | 4.92 | 109,841 |
| Countries That End in BIA | 0 | - | 4.93 | 149,275 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 167,191 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,487 |
| Countries That End in RIA | 0 | - | 4.93 | 126,861 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 111,081 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 227,811 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 133,803 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 126,237 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 91,790 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,626 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 53,086 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,463 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,597 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,471 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,376 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 54,066 |
| Countries that End in L | 0 | - | 4.94 | 156,899 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 216,133 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,286 |
| City to Country Quiz #1 | 0 | - | 4.97 | 156,078 |
| City to Country Quiz #3 | 0 | - | 4.88 | 119,002 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 79,046 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 249,901 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 200,765 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 143,206 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 163,912 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 225,571 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 152,938 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 71,129 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,726 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,912 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,449,426 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 381,277 |
| One Border Countries | 0 | - | 4.98 | 470,292 |
| Top Producing Countries | 0 | - | 4.63 | 116,288 |
| ISO Country Codes | 0 | - | 4.49 | 91,421 |
| Countries on the Equator | 0 | - | 4.63 | 141,046 |
| Members of the Arab League | 0 | - | 4.77 | 75,657 |
| Countries with the Oldest Median Age | 0 | - | 4.80 | 69,953 |
| Separatist Movements | 0 | - | 4.45 | 45,928 |
| Countries with the Best Passports | 0 | - | 4.73 | 85,337 |
| Prime Meridian Countries | 0 | - | 4.69 | 59,849 |
| Next Country Alphabetically | 0 | - | 4.70 | 86,314 |
| Westernmost Countries | 0 | - | 4.43 | 62,463 |
| Easternmost Countries | 0 | - | 4.75 | 62,996 |
| Countries With the Most ISIS Fighters | 0 | - | 4.54 | 39,692 |
| Top 10 Most Famous Island Countries | 0 | - | 4.69 | 108,741 |
| Indochina Countries | 0 | - | 4.74 | 66,243 |
| Atlantic Ocean Island Countries | 0 | - | 4.56 | 64,652 |
| Countries With the Most Conflict Deaths | 0 | - | 4.61 | 96,397 |
| Highest Foreign Aid Recipients | 0 | - | 4.67 | 43,993 |
| Pacific Ocean Island Countries | 0 | - | 4.49 | 57,127 |
| Countries with the Most Traffic-Related Deaths | 0 | - | 4.74 | 48,432 |
| Countries with the Lowest Obesity Rate | 0 | - | 4.47 | 53,744 |
| Countries that are the Source of Refugees | 0 | - | 4.80 | 73,554 |
| Countries 206 to 242 | 0 | - | 4.74 | 33,986 |
| Most Populous Countries By Category | 0 | - | 4.55 | 85,506 |
| Countries with the Most Turkic People | 0 | - | 4.75 | 45,753 |
| Countries Most-Mentioned by the New York Times, 1900–2018 | 0 | - | 4.74 | 61,648 |
| Flyover Countries | 0 | - | 4.69 | 50,883 |
| Top 50 Countries by Area - In Order | 0 | - | 4.73 | 74,062 |
