| Landlocked Countries | 0 | - | 4.99 | 426,507 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,918,082 |
| Sahara Desert Countries | 0 | - | 4.98 | 166,531 |
| Himalayan Countries | 0 | - | 4.93 | 140,469 |
| Andean Countries | 0 | - | 4.94 | 85,608 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 64,744 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 127,205 |
| Coffee Producing Countries | 0 | - | 4.83 | 68,310 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 66,542 |
| Danube Countries | 0 | - | 4.97 | 72,466 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 117,676 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,899 |
| Countries with the Worst Passports | 0 | - | 4.93 | 85,259 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 150,729 |
| European Landlocked Countries | 0 | - | 4.99 | 147,666 |
| Partially Recognized Countries | 0 | - | 4.98 | 107,394 |
| Countries with the Most Species | 0 | - | 4.99 | 103,604 |
| Countries 197 to 205 | 0 | - | 4.90 | 71,505 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,790 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,911 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,875 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,615 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 58,065 |
| Countries in the Alps | 0 | - | 4.87 | 118,854 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 102,785 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 107,986 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 79,009 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 97,090 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 117,038 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 96,319 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 101,469 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,917 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,462 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 63,232 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,912 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.91 | 41,780 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,606 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,846 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,947 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 119,979 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,654 |
| Countries that Host the Most Refugees | 0 | - | 4.96 | 75,499 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 46,742 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 245,943 |
| World Countries - Blind Typing | 0 | - | 5.00 | 109,293 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,550 |
| Largest Countries By Category | 0 | - | 4.97 | 158,947 |
| Countries by Countries | 0 | - | 4.96 | 63,706 |
| Country Flags with the Most White | 0 | - | 4.85 | 139,328 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,425 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,688 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 89,150 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,807,694 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 335,956 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 376,838 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 409,982 |
| Island Countries | 0 | - | 4.99 | 712,749 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,055,327 |
| Northernmost Countries | 0 | - | 4.99 | 364,266 |
| Countries of South America | 0 | - | 5.00 | 933,361 |
| Countries of Oceania | 0 | - | 5.00 | 1,064,343 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,890,890 |
| "Land" Countries | 0 | - | 4.98 | 338,535 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 175,310 |
| Countries with Megacities | 0 | - | 4.99 | 267,431 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 200,981 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 114,225 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 139,307 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 82,328 |
| Countries by Official Language | 0 | - | 4.95 | 196,106 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 297,773 |
| Countries in their Native Language | 0 | - | 4.99 | 199,834 |
| Independence from Whom | 0 | - | 4.99 | 213,213 |
| Subdivisions by Country | 0 | - | 4.87 | 50,640 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 133,555 |
| Megadiverse Countries | 0 | - | 4.96 | 144,012 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 133,030 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 55,554 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 126,746 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,237 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 164,344 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,886 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 95,181 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 154,590 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 96,119 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,275 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 78,633 |
| Landmarks of Countries #1 | 0 | - | 4.89 | 108,430 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,462 |
| Countries with the Highest HDI | 0 | - | 4.95 | 137,174 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,602 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,912 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,395,195 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 112,520 |
| World Map Quiz | 0 | - | 4.81 | 65,819 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 159,524 |
| Smallest Countries with at Least One Border | 0 | - | 4.88 | 107,757 |
| Countries by Founding Story | 0 | - | 4.95 | 77,852 |
| Countries by Road Signs | 0 | - | 4.98 | 54,392 |
| Southernmost Countries of the World | 0 | - | 4.99 | 229,374 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 106,152 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 123,618 |
| Countries With the Most Languages | 0 | - | 4.90 | 203,725 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.96 | 111,482 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 94,601 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,788 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,722 |
| Tallest Countries North to South | 0 | - | 4.85 | 130,839 |
| Widest Countries East to West | 0 | - | 4.92 | 130,776 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,616 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 187,302 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,534 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 95,096 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 149,035 |
| Countries with the Most Desert | 0 | - | 4.93 | 128,532 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,516 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,906 |
| Countries with Double Letters | 0 | - | 4.96 | 97,213 |
| Countries that End in N | 0 | - | 4.95 | 172,271 |
| Countries with Five Letters | 0 | - | 4.96 | 284,173 |
| Countries with Six Letters | 0 | - | 4.94 | 214,630 |
| Countries with W | 0 | - | 4.96 | 161,050 |
| Countries with Z | 0 | - | 4.98 | 292,603 |
| Countries with Letters Missing | 0 | - | 4.96 | 187,387 |
| Countries That End in U | 0 | - | 4.95 | 121,244 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 135,195 |
| Countries that End in O | 0 | - | 4.92 | 160,267 |
| Countries that End in R | 0 | - | 4.87 | 119,216 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,979 |
| Countries Ending in "IA" | 0 | - | 4.99 | 209,961 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 171,225 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,877 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 142,808 |
| Countries That End in Y | 0 | - | 4.91 | 186,113 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 198,533 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 153,325 |
| Countries that End in I | 0 | - | 4.94 | 135,361 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 184,691 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 96,089 |
| Countries That End in NIA | 0 | - | 4.92 | 110,095 |
| Countries That End in BIA | 0 | - | 4.93 | 149,640 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 167,778 |
| Countries Whose Names Start with Saint | 0 | - | 4.88 | 119,811 |
| Countries That End in RIA | 0 | - | 4.93 | 127,089 |
| Most Common Words in Official Country Names | 0 | - | 4.85 | 111,446 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 228,741 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 134,258 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 126,713 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 92,259 |
| Add A Letter - Make a Country | 0 | - | 4.81 | 74,839 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 53,365 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,555 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,966 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,672 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,794 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 54,488 |
| Countries that End in L | 0 | - | 4.94 | 157,180 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 218,215 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,361 |
| City to Country Quiz #1 | 0 | - | 4.97 | 157,574 |
| City to Country Quiz #3 | 0 | - | 4.88 | 120,045 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 79,490 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 250,525 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 201,204 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 143,466 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 164,334 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 226,051 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 153,259 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 71,259 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,852 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 63,292 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,454,932 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 382,693 |
| One Border Countries | 0 | - | 4.98 | 472,207 |
| Top Producing Countries | 0 | - | 4.63 | 116,432 |
| ISO Country Codes | 0 | - | 4.49 | 91,713 |
| Countries on the Equator | 0 | - | 4.63 | 141,269 |
| Members of the Arab League | 0 | - | 4.77 | 75,733 |
| Countries with the Oldest Median Age | 0 | - | 4.80 | 70,089 |
| Separatist Movements | 0 | - | 4.45 | 46,052 |
| Countries with the Best Passports | 0 | - | 4.73 | 85,627 |
| Prime Meridian Countries | 0 | - | 4.69 | 59,934 |
| Next Country Alphabetically | 0 | - | 4.70 | 86,456 |
| Westernmost Countries | 0 | - | 4.43 | 62,556 |
| Easternmost Countries | 0 | - | 4.74 | 63,075 |
| Countries With the Most ISIS Fighters | 0 | - | 4.54 | 39,766 |
| Top 10 Most Famous Island Countries | 0 | - | 4.69 | 109,051 |
| Indochina Countries | 0 | - | 4.74 | 66,371 |
| Atlantic Ocean Island Countries | 0 | - | 4.56 | 64,690 |
| Countries With the Most Conflict Deaths | 0 | - | 4.62 | 96,831 |
| Highest Foreign Aid Recipients | 0 | - | 4.67 | 44,033 |
| Pacific Ocean Island Countries | 0 | - | 4.49 | 57,172 |
| Countries with the Most Traffic-Related Deaths | 0 | - | 4.74 | 48,511 |
| Countries with More Sheep than People | 0 | - | 4.48 | 32,088 |
| Countries with the Lowest Obesity Rate | 0 | - | 4.47 | 53,876 |
| Countries that are the Source of Refugees | 0 | - | 4.78 | 75,854 |
| Countries 206 to 242 | 0 | - | 4.74 | 34,091 |
| Most Populous Countries By Category | 0 | - | 4.55 | 85,712 |
| Countries with the Most Turkic People | 0 | - | 4.77 | 45,888 |
| Countries Most-Mentioned by the New York Times, 1900–2018 | 0 | - | 4.74 | 61,784 |
