| Landlocked Countries | 0 | - | 4.99 | 426,435 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,914,510 |
| Sahara Desert Countries | 0 | - | 4.98 | 166,512 |
| Himalayan Countries | 0 | - | 4.93 | 140,452 |
| Andean Countries | 0 | - | 4.94 | 85,591 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 64,736 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 127,185 |
| Coffee Producing Countries | 0 | - | 4.83 | 68,298 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 66,538 |
| Danube Countries | 0 | - | 4.97 | 72,464 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 117,672 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,895 |
| Countries with the Worst Passports | 0 | - | 4.93 | 85,244 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 150,718 |
| European Landlocked Countries | 0 | - | 4.99 | 147,658 |
| Partially Recognized Countries | 0 | - | 4.98 | 107,383 |
| Countries with the Most Species | 0 | - | 4.99 | 103,599 |
| Countries 197 to 205 | 0 | - | 4.90 | 71,493 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,788 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,910 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,871 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,612 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 58,063 |
| Countries in the Alps | 0 | - | 4.87 | 118,844 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 102,766 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 107,976 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 79,006 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 97,080 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 117,025 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 96,311 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 101,466 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,909 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,459 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 63,224 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,907 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.91 | 41,774 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,598 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,841 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,939 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 119,965 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,653 |
| Countries that Host the Most Refugees | 0 | - | 4.96 | 75,305 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 46,732 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 245,911 |
| World Countries - Blind Typing | 0 | - | 5.00 | 109,273 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,547 |
| Largest Countries By Category | 0 | - | 4.97 | 158,941 |
| Countries by Countries | 0 | - | 4.96 | 63,699 |
| Country Flags with the Most White | 0 | - | 4.85 | 139,320 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,422 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,686 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 89,143 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,807,384 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 335,914 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 376,822 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 409,952 |
| Island Countries | 0 | - | 4.99 | 712,727 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,055,265 |
| Northernmost Countries | 0 | - | 4.99 | 364,238 |
| Countries of South America | 0 | - | 5.00 | 933,307 |
| Countries of Oceania | 0 | - | 5.00 | 1,064,292 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,890,756 |
| "Land" Countries | 0 | - | 4.98 | 338,522 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 175,296 |
| Countries with Megacities | 0 | - | 4.99 | 267,402 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 200,970 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 114,219 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 139,297 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 82,323 |
| Countries by Official Language | 0 | - | 4.95 | 196,095 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 297,757 |
| Countries in their Native Language | 0 | - | 4.99 | 199,824 |
| Independence from Whom | 0 | - | 4.99 | 213,197 |
| Subdivisions by Country | 0 | - | 4.87 | 50,640 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 133,549 |
| Megadiverse Countries | 0 | - | 4.96 | 142,261 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 133,019 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 55,553 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 126,744 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,235 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 164,337 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,883 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 95,169 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 154,588 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 96,114 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,272 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 78,624 |
| Landmarks of Countries #1 | 0 | - | 4.89 | 108,422 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,462 |
| Countries with the Highest HDI | 0 | - | 4.95 | 137,170 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,602 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,909 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,395,040 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 112,498 |
| World Map Quiz | 0 | - | 4.81 | 65,807 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 159,494 |
| Smallest Countries with at Least One Border | 0 | - | 4.88 | 107,750 |
| Countries by Founding Story | 0 | - | 4.95 | 77,849 |
| Countries by Road Signs | 0 | - | 4.98 | 54,388 |
| Southernmost Countries of the World | 0 | - | 4.99 | 229,359 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 106,148 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 123,609 |
| Countries With the Most Languages | 0 | - | 4.90 | 203,708 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.96 | 111,481 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 94,595 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,786 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,717 |
| Tallest Countries North to South | 0 | - | 4.85 | 130,832 |
| Widest Countries East to West | 0 | - | 4.92 | 130,773 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,613 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 187,297 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,533 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 95,093 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 149,031 |
| Countries with the Most Desert | 0 | - | 4.93 | 128,524 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,515 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,905 |
| Countries with Double Letters | 0 | - | 4.96 | 97,203 |
| Countries that End in N | 0 | - | 4.95 | 172,219 |
| Countries with Five Letters | 0 | - | 4.96 | 284,151 |
| Countries with Six Letters | 0 | - | 4.94 | 214,613 |
| Countries with W | 0 | - | 4.96 | 161,040 |
| Countries with Z | 0 | - | 4.98 | 292,581 |
| Countries with Letters Missing | 0 | - | 4.96 | 187,376 |
| Countries That End in U | 0 | - | 4.95 | 121,240 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 135,185 |
| Countries that End in O | 0 | - | 4.92 | 160,260 |
| Countries that End in R | 0 | - | 4.87 | 119,213 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,976 |
| Countries Ending in "IA" | 0 | - | 4.99 | 209,950 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 171,218 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,874 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 142,803 |
| Countries That End in Y | 0 | - | 4.91 | 186,110 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 198,527 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 153,322 |
| Countries that End in I | 0 | - | 4.94 | 135,351 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 184,688 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 96,087 |
| Countries That End in NIA | 0 | - | 4.92 | 110,094 |
| Countries That End in BIA | 0 | - | 4.93 | 149,636 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 167,722 |
| Countries Whose Names Start with Saint | 0 | - | 4.88 | 119,809 |
| Countries That End in RIA | 0 | - | 4.93 | 127,087 |
| Most Common Words in Official Country Names | 0 | - | 4.85 | 111,441 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 228,721 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 134,253 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 126,701 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 92,249 |
| Add A Letter - Make a Country | 0 | - | 4.81 | 74,837 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 53,362 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,554 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,956 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,669 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,786 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 54,481 |
| Countries that End in L | 0 | - | 4.94 | 157,176 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 218,197 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,360 |
| City to Country Quiz #1 | 0 | - | 4.97 | 157,567 |
| City to Country Quiz #3 | 0 | - | 4.88 | 120,042 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 79,484 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 250,518 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 201,200 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 143,465 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 164,328 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 226,044 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 153,254 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 71,258 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,849 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 63,289 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,454,847 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 382,675 |
| One Border Countries | 0 | - | 4.98 | 472,187 |
| Top Producing Countries | 0 | - | 4.63 | 116,431 |
| ISO Country Codes | 0 | - | 4.49 | 91,707 |
| Countries on the Equator | 0 | - | 4.63 | 141,268 |
| Members of the Arab League | 0 | - | 4.77 | 75,733 |
| Countries with the Oldest Median Age | 0 | - | 4.80 | 70,088 |
| Separatist Movements | 0 | - | 4.45 | 46,050 |
| Countries with the Best Passports | 0 | - | 4.73 | 85,617 |
| Prime Meridian Countries | 0 | - | 4.69 | 59,933 |
| Next Country Alphabetically | 0 | - | 4.70 | 86,454 |
| 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 | 109,046 |
| Indochina Countries | 0 | - | 4.74 | 66,370 |
| Atlantic Ocean Island Countries | 0 | - | 4.56 | 64,689 |
| Countries With the Most Conflict Deaths | 0 | - | 4.62 | 96,830 |
| Highest Foreign Aid Recipients | 0 | - | 4.67 | 44,033 |
| Pacific Ocean Island Countries | 0 | - | 4.49 | 57,171 |
| Countries with the Most Traffic-Related Deaths | 0 | - | 4.74 | 48,509 |
| Countries with More Sheep than People | 0 | - | 4.48 | 32,083 |
| Countries with the Lowest Obesity Rate | 0 | - | 4.47 | 53,876 |
| Countries that are the Source of Refugees | 0 | - | 4.78 | 75,835 |
| Countries 206 to 242 | 0 | - | 4.74 | 34,090 |
| Most Populous Countries By Category | 0 | - | 4.55 | 85,712 |
| Countries with the Most Turkic People | 0 | - | 4.77 | 45,886 |
| Countries Most-Mentioned by the New York Times, 1900–2018 | 0 | - | 4.74 | 61,781 |
