| Landlocked Countries | 0 | - | 4.99 | 423,063 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,668,566 |
| Sahara Desert Countries | 0 | - | 4.98 | 165,043 |
| Himalayan Countries | 0 | - | 4.95 | 139,198 |
| Andean Countries | 0 | - | 4.93 | 84,884 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 64,101 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 126,240 |
| Coffee Producing Countries | 0 | - | 4.83 | 67,681 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,996 |
| Danube Countries | 0 | - | 4.97 | 72,140 |
| Countries With an "Ish" Demonym | 0 | - | 4.98 | 117,198 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,546 |
| Countries with the Worst Passports | 0 | - | 4.93 | 84,541 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 150,052 |
| European Landlocked Countries | 0 | - | 4.99 | 147,284 |
| Partially Recognized Countries | 0 | - | 4.98 | 106,843 |
| Countries with the Most Species | 0 | - | 4.99 | 103,352 |
| Countries 197 to 205 | 0 | - | 4.90 | 70,970 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,648 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,768 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,621 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,371 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,791 |
| Countries in the Alps | 0 | - | 4.87 | 118,371 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 101,779 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 107,298 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,760 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,722 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,645 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 96,044 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,820 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,611 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,251 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,958 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,723 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,595 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,331 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,569 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,638 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 119,171 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,405 |
| Countries that Host the Most Refugees | 0 | - | 4.96 | 64,790 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 46,256 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 244,526 |
| World Countries - Blind Typing | 0 | - | 5.00 | 108,438 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,315 |
| Largest Countries By Category | 0 | - | 4.97 | 158,409 |
| Countries by Countries | 0 | - | 4.96 | 63,363 |
| Country Flags with the Most White | 0 | - | 4.85 | 138,855 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,328 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,592 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 88,795 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,786,307 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 332,567 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 375,861 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 408,021 |
| Island Countries | 0 | - | 4.99 | 711,438 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,051,243 |
| Northernmost Countries | 0 | - | 4.99 | 362,513 |
| Countries of South America | 0 | - | 5.00 | 928,872 |
| Countries of Oceania | 0 | - | 5.00 | 1,058,802 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,880,721 |
| "Land" Countries | 0 | - | 4.98 | 337,643 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 174,217 |
| Countries with Megacities | 0 | - | 4.99 | 265,343 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 200,044 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,646 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 138,286 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 81,720 |
| Countries by Official Language | 0 | - | 4.95 | 195,479 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 296,686 |
| Countries in their Native Language | 0 | - | 4.99 | 199,252 |
| Independence from Whom | 0 | - | 4.99 | 212,344 |
| Subdivisions by Country | 0 | - | 4.87 | 50,485 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 132,919 |
| Megadiverse Countries | 0 | - | 4.96 | 135,099 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 132,286 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,419 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 126,297 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,142 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 163,276 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,664 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,621 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 154,418 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,710 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,184 |
| Countries by Sports League Revenue | 0 | - | 4.95 | 77,918 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,954 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,271 |
| Countries with the Highest HDI | 0 | - | 4.95 | 137,015 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,428 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,551 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,386,390 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 111,554 |
| World Map Quiz | 0 | - | 4.81 | 65,258 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 157,852 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,459 |
| Countries by Founding Story | 0 | - | 4.95 | 77,460 |
| Countries by Road Signs | 0 | - | 4.98 | 54,118 |
| Southernmost Countries of the World | 0 | - | 4.99 | 228,319 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 105,416 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 123,122 |
| Countries With the Most Languages | 0 | - | 4.90 | 202,590 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 111,017 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 94,129 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,401 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,497 |
| Tallest Countries North to South | 0 | - | 4.83 | 120,653 |
| Widest Countries East to West | 0 | - | 4.92 | 129,757 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,481 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 186,517 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,386 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,845 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,704 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,978 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,415 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,822 |
| Countries with Double Letters | 0 | - | 4.96 | 96,490 |
| Countries that End in N | 0 | - | 4.95 | 171,380 |
| Countries with Five Letters | 0 | - | 4.96 | 282,936 |
| Countries with Six Letters | 0 | - | 4.94 | 213,820 |
| Countries with W | 0 | - | 4.96 | 160,516 |
| Countries with Z | 0 | - | 4.98 | 291,739 |
| Countries with Letters Missing | 0 | - | 4.96 | 186,869 |
| Countries That End in U | 0 | - | 4.95 | 120,945 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 134,642 |
| Countries that End in O | 0 | - | 4.92 | 159,599 |
| Countries that End in R | 0 | - | 4.87 | 119,028 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,791 |
| Countries Ending in "IA" | 0 | - | 4.99 | 209,327 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 170,824 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,583 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 142,495 |
| Countries That End in Y | 0 | - | 4.91 | 185,946 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 198,065 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 152,991 |
| Countries that End in I | 0 | - | 4.94 | 135,172 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 184,251 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,884 |
| Countries That End in NIA | 0 | - | 4.92 | 109,859 |
| Countries That End in BIA | 0 | - | 4.93 | 149,309 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 167,221 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,528 |
| Countries That End in RIA | 0 | - | 4.93 | 126,884 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 111,127 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 227,902 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 133,853 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 126,282 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 91,833 |
| Add A Letter - Make a Country | 0 | - | 4.81 | 74,640 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 53,118 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,470 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,633 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,494 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,419 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 54,109 |
| Countries that End in L | 0 | - | 4.94 | 156,926 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 216,287 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,290 |
| City to Country Quiz #1 | 0 | - | 4.97 | 156,097 |
| City to Country Quiz #3 | 0 | - | 4.88 | 119,025 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 79,070 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 249,949 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 200,811 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 143,235 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 163,953 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 225,610 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 152,970 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 71,140 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,737 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 63,026 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,449,972 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 381,410 |
| One Border Countries | 0 | - | 4.98 | 470,488 |
| Top Producing Countries | 0 | - | 4.63 | 116,303 |
| ISO Country Codes | 0 | - | 4.49 | 91,457 |
| Countries on the Equator | 0 | - | 4.63 | 141,065 |
| Members of the Arab League | 0 | - | 4.77 | 75,661 |
| Countries with the Oldest Median Age | 0 | - | 4.80 | 69,970 |
| Separatist Movements | 0 | - | 4.45 | 45,942 |
| Countries with the Best Passports | 0 | - | 4.73 | 85,363 |
| Prime Meridian Countries | 0 | - | 4.69 | 59,856 |
| Next Country Alphabetically | 0 | - | 4.70 | 86,324 |
| Westernmost Countries | 0 | - | 4.43 | 62,483 |
| Easternmost Countries | 0 | - | 4.75 | 63,016 |
| Top 10 Most Famous Island Countries | 0 | - | 4.69 | 108,774 |
| Indochina Countries | 0 | - | 4.74 | 66,255 |
| Atlantic Ocean Island Countries | 0 | - | 4.56 | 64,659 |
| Countries With the Most Conflict Deaths | 0 | - | 4.61 | 96,409 |
| Highest Foreign Aid Recipients | 0 | - | 4.67 | 43,995 |
| Pacific Ocean Island Countries | 0 | - | 4.49 | 57,130 |
| Countries with the Most Traffic-Related Deaths | 0 | - | 4.74 | 48,440 |
| Countries with More Sheep than People | 0 | - | 4.48 | 31,655 |
| Countries with the Lowest Obesity Rate | 0 | - | 4.47 | 53,762 |
| Countries that are the Source of Refugees | 0 | - | 4.78 | 74,115 |
| Countries 206 to 242 | 0 | - | 4.74 | 34,004 |
| Most Populous Countries By Category | 0 | - | 4.55 | 85,528 |
| Countries with the Most Turkic People | 0 | - | 4.75 | 45,764 |
| Countries Most-Mentioned by the New York Times, 1900–2018 | 0 | - | 4.74 | 61,661 |
| Flyover Countries | 0 | - | 4.69 | 50,896 |
