| Landlocked Countries | 0 | - | 4.99 | 424,318 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,769,521 |
| Sahara Desert Countries | 0 | - | 4.98 | 165,559 |
| Himalayan Countries | 0 | - | 4.94 | 139,714 |
| Andean Countries | 0 | - | 4.94 | 85,155 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 64,327 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 126,580 |
| Coffee Producing Countries | 0 | - | 4.83 | 67,905 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 66,188 |
| Danube Countries | 0 | - | 4.97 | 72,256 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 117,393 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,685 |
| Countries with the Worst Passports | 0 | - | 4.93 | 84,817 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 150,315 |
| European Landlocked Countries | 0 | - | 4.99 | 147,437 |
| Partially Recognized Countries | 0 | - | 4.98 | 107,051 |
| Countries with the Most Species | 0 | - | 4.99 | 103,462 |
| Countries 197 to 205 | 0 | - | 4.90 | 71,185 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,701 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,814 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,731 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,462 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,888 |
| Countries in the Alps | 0 | - | 4.87 | 118,555 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 102,245 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 107,569 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,845 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,859 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,782 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 96,121 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 101,034 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,719 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,331 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 63,050 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,783 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,650 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,432 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,668 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,758 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 119,470 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,509 |
| Countries that Host the Most Refugees | 0 | - | 4.96 | 65,484 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 46,465 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 245,134 |
| World Countries - Blind Typing | 0 | - | 5.00 | 108,794 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,417 |
| Largest Countries By Category | 0 | - | 4.97 | 158,611 |
| Countries by Countries | 0 | - | 4.96 | 63,492 |
| Country Flags with the Most White | 0 | - | 4.85 | 139,064 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,361 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,638 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 88,961 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,795,258 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 333,927 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 376,256 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 408,847 |
| Island Countries | 0 | - | 4.99 | 711,987 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,053,078 |
| Northernmost Countries | 0 | - | 4.99 | 363,335 |
| Countries of South America | 0 | - | 5.00 | 930,650 |
| Countries of Oceania | 0 | - | 5.00 | 1,061,053 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,884,952 |
| "Land" Countries | 0 | - | 4.98 | 338,020 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 174,739 |
| Countries with Megacities | 0 | - | 4.99 | 266,286 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 200,464 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,876 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 138,758 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 81,985 |
| Countries by Official Language | 0 | - | 4.95 | 195,750 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 297,271 |
| Countries in their Native Language | 0 | - | 4.99 | 199,526 |
| Independence from Whom | 0 | - | 4.99 | 212,711 |
| Subdivisions by Country | 0 | - | 4.87 | 50,557 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 133,187 |
| Megadiverse Countries | 0 | - | 4.96 | 135,184 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 132,742 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 55,476 |
| Countries with Multiple Big Islands | 0 | - | 4.92 | 126,372 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,178 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 163,423 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,743 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,875 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 154,499 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,769 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,220 |
| Countries by Sports League Revenue | 0 | - | 4.95 | 78,164 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 108,300 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,365 |
| Countries with the Highest HDI | 0 | - | 4.95 | 137,086 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,509 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,622 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,390,342 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 111,974 |
| World Map Quiz | 0 | - | 4.81 | 65,419 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 158,532 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,563 |
| Countries by Founding Story | 0 | - | 4.95 | 77,651 |
| Southernmost Countries of the World | 0 | - | 4.99 | 228,958 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 105,929 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 123,419 |
| Countries With the Most Languages | 0 | - | 4.90 | 203,181 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.96 | 111,274 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 94,394 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,587 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,613 |
| Tallest Countries North to South | 0 | - | 4.86 | 129,986 |
| Widest Countries East to West | 0 | - | 4.92 | 130,297 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,556 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 187,090 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,459 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,970 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,848 |
| Countries with the Most Desert | 0 | - | 4.93 | 128,351 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,462 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,861 |
| Countries with Double Letters | 0 | - | 4.96 | 96,782 |
| Countries that End in N | 0 | - | 4.95 | 171,669 |
| Countries with Five Letters | 0 | - | 4.96 | 283,362 |
| Countries with Six Letters | 0 | - | 4.94 | 214,123 |
| Countries with W | 0 | - | 4.96 | 160,730 |
| Countries with Z | 0 | - | 4.98 | 292,100 |
| Countries with Letters Missing | 0 | - | 4.96 | 187,079 |
| Countries That End in U | 0 | - | 4.95 | 121,067 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 134,880 |
| Countries that End in O | 0 | - | 4.92 | 159,715 |
| Countries that End in R | 0 | - | 4.87 | 119,105 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,851 |
| Countries Ending in "IA" | 0 | - | 4.99 | 209,558 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 170,995 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,699 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 142,630 |
| Countries That End in Y | 0 | - | 4.91 | 186,020 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 198,269 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 153,124 |
| Countries that End in I | 0 | - | 4.94 | 135,245 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 184,447 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,969 |
| Countries That End in NIA | 0 | - | 4.92 | 109,953 |
| Countries That End in BIA | 0 | - | 4.93 | 149,443 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 167,379 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,653 |
| Countries That End in RIA | 0 | - | 4.93 | 126,971 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 111,262 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 228,231 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 134,018 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 126,451 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 92,014 |
| Add A Letter - Make a Country | 0 | - | 4.81 | 74,725 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 53,224 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,506 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,771 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,575 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,571 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 54,261 |
| Countries that End in L | 0 | - | 4.94 | 157,022 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 216,935 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,316 |
| City to Country Quiz #1 | 0 | - | 4.97 | 156,438 |
| City to Country Quiz #3 | 0 | - | 4.88 | 119,284 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 79,197 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 250,201 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 200,980 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 143,331 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 164,115 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 225,802 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 153,101 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 71,189 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,776 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 63,154 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,452,011 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 381,955 |
| One Border Countries | 0 | - | 4.98 | 471,252 |
| Top Producing Countries | 0 | - | 4.63 | 116,359 |
| ISO Country Codes | 0 | - | 4.49 | 91,557 |
| Countries on the Equator | 0 | - | 4.63 | 141,151 |
| Members of the Arab League | 0 | - | 4.77 | 75,695 |
| Countries with the Oldest Median Age | 0 | - | 4.80 | 70,004 |
| Separatist Movements | 0 | - | 4.45 | 45,982 |
| Countries with the Best Passports | 0 | - | 4.73 | 85,459 |
| Prime Meridian Countries | 0 | - | 4.69 | 59,892 |
| Next Country Alphabetically | 0 | - | 4.70 | 86,375 |
| Westernmost Countries | 0 | - | 4.43 | 62,520 |
| Easternmost Countries | 0 | - | 4.74 | 63,045 |
| Countries With the Most ISIS Fighters | 0 | - | 4.54 | 39,729 |
| Top 10 Most Famous Island Countries | 0 | - | 4.69 | 108,892 |
| Indochina Countries | 0 | - | 4.74 | 66,293 |
| Atlantic Ocean Island Countries | 0 | - | 4.56 | 64,668 |
| Countries With the Most Conflict Deaths | 0 | - | 4.62 | 96,451 |
| Highest Foreign Aid Recipients | 0 | - | 4.67 | 44,019 |
| Pacific Ocean Island Countries | 0 | - | 4.49 | 57,147 |
| Countries with the Most Traffic-Related Deaths | 0 | - | 4.74 | 48,469 |
| Countries with More Sheep than People | 0 | - | 4.48 | 31,932 |
| Countries with the Lowest Obesity Rate | 0 | - | 4.47 | 53,806 |
| Countries that are the Source of Refugees | 0 | - | 4.78 | 75,115 |
| Countries 206 to 242 | 0 | - | 4.74 | 34,033 |
| Most Populous Countries By Category | 0 | - | 4.55 | 85,616 |
| Countries with the Most Turkic People | 0 | - | 4.77 | 45,817 |
| Countries Most-Mentioned by the New York Times, 1900–2018 | 0 | - | 4.74 | 61,714 |
| Flyover Countries | 0 | - | 4.69 | 50,950 |
