| Landlocked Countries | 0 | - | 4.99 | 426,341 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,909,095 |
| Sahara Desert Countries | 0 | - | 4.98 | 166,473 |
| Himalayan Countries | 0 | - | 4.93 | 140,424 |
| Andean Countries | 0 | - | 4.94 | 85,564 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 64,716 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 127,163 |
| Coffee Producing Countries | 0 | - | 4.83 | 68,278 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 66,519 |
| Danube Countries | 0 | - | 4.97 | 72,453 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 117,664 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,885 |
| Countries with the Worst Passports | 0 | - | 4.93 | 85,228 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 150,701 |
| European Landlocked Countries | 0 | - | 4.99 | 147,649 |
| Partially Recognized Countries | 0 | - | 4.98 | 107,366 |
| Countries with the Most Species | 0 | - | 4.99 | 103,593 |
| Countries 197 to 205 | 0 | - | 4.90 | 71,473 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,788 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,904 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,868 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,605 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 58,053 |
| Countries in the Alps | 0 | - | 4.87 | 118,834 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 102,740 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 107,958 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,993 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 97,069 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 117,008 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 96,298 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 101,454 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,901 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,453 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 63,219 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,905 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.91 | 41,769 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,590 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,832 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,926 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 119,940 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,645 |
| Countries that Host the Most Refugees | 0 | - | 4.96 | 75,013 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 46,723 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 245,887 |
| World Countries - Blind Typing | 0 | - | 5.00 | 109,251 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,543 |
| Largest Countries By Category | 0 | - | 4.97 | 158,928 |
| Countries by Countries | 0 | - | 4.96 | 63,687 |
| Country Flags with the Most White | 0 | - | 4.85 | 139,309 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,420 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,685 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 89,132 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,806,939 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 335,793 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 376,802 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 409,920 |
| Island Countries | 0 | - | 4.99 | 712,707 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,055,197 |
| Northernmost Countries | 0 | - | 4.99 | 364,206 |
| Countries of South America | 0 | - | 5.00 | 933,215 |
| Countries of Oceania | 0 | - | 5.00 | 1,064,155 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,890,546 |
| "Land" Countries | 0 | - | 4.98 | 338,502 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 175,279 |
| Countries with Megacities | 0 | - | 4.99 | 267,357 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 200,952 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 114,208 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 139,267 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 82,311 |
| Countries by Official Language | 0 | - | 4.95 | 196,081 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 297,736 |
| Countries in their Native Language | 0 | - | 4.99 | 199,807 |
| Independence from Whom | 0 | - | 4.99 | 213,178 |
| Subdivisions by Country | 0 | - | 4.87 | 50,636 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 133,532 |
| Megadiverse Countries | 0 | - | 4.96 | 139,175 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 133,005 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 55,552 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 126,737 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,234 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 164,329 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,878 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 95,161 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 154,584 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 96,103 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,268 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 78,616 |
| Landmarks of Countries #1 | 0 | - | 4.89 | 108,405 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,458 |
| Countries with the Highest HDI | 0 | - | 4.95 | 137,166 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,600 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,900 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,394,876 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 112,465 |
| World Map Quiz | 0 | - | 4.81 | 65,797 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 159,467 |
| Smallest Countries with at Least One Border | 0 | - | 4.88 | 107,744 |
| Countries by Founding Story | 0 | - | 4.95 | 77,842 |
| Countries by Road Signs | 0 | - | 4.98 | 54,383 |
| Southernmost Countries of the World | 0 | - | 4.99 | 229,347 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 106,143 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 123,607 |
| Countries With the Most Languages | 0 | - | 4.90 | 203,686 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.96 | 111,474 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 94,589 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,783 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,715 |
| Tallest Countries North to South | 0 | - | 4.85 | 130,813 |
| Widest Countries East to West | 0 | - | 4.92 | 130,761 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,610 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 187,293 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,528 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 95,088 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 149,022 |
| Countries with the Most Desert | 0 | - | 4.93 | 128,513 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,514 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,902 |
| Countries with Double Letters | 0 | - | 4.96 | 97,175 |
| Countries that End in N | 0 | - | 4.95 | 172,108 |
| Countries with Five Letters | 0 | - | 4.96 | 284,123 |
| Countries with Six Letters | 0 | - | 4.94 | 214,594 |
| Countries with W | 0 | - | 4.96 | 161,025 |
| Countries with Z | 0 | - | 4.98 | 292,561 |
| Countries with Letters Missing | 0 | - | 4.96 | 187,362 |
| Countries That End in U | 0 | - | 4.95 | 121,233 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 135,179 |
| Countries that End in O | 0 | - | 4.92 | 160,253 |
| Countries that End in R | 0 | - | 4.87 | 119,207 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,975 |
| Countries Ending in "IA" | 0 | - | 4.99 | 209,934 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 171,208 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,870 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 142,793 |
| Countries That End in Y | 0 | - | 4.91 | 186,105 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 198,515 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 153,314 |
| Countries that End in I | 0 | - | 4.94 | 135,345 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 184,677 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 96,085 |
| Countries That End in NIA | 0 | - | 4.92 | 110,090 |
| Countries That End in BIA | 0 | - | 4.93 | 149,616 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 167,653 |
| Countries Whose Names Start with Saint | 0 | - | 4.88 | 119,802 |
| Countries That End in RIA | 0 | - | 4.93 | 127,083 |
| Most Common Words in Official Country Names | 0 | - | 4.85 | 111,434 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 228,692 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 134,240 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 126,688 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 92,242 |
| Add A Letter - Make a Country | 0 | - | 4.81 | 74,832 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 53,358 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,550 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,948 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,666 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,776 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 54,475 |
| Countries that End in L | 0 | - | 4.94 | 157,170 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 218,175 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,357 |
| City to Country Quiz #1 | 0 | - | 4.97 | 157,561 |
| City to Country Quiz #3 | 0 | - | 4.88 | 120,037 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 79,479 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 250,500 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 201,195 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 143,461 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 164,321 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 226,035 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 153,249 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 71,258 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,847 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 63,284 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,454,741 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 382,648 |
| One Border Countries | 0 | - | 4.98 | 472,143 |
| Top Producing Countries | 0 | - | 4.63 | 116,429 |
| ISO Country Codes | 0 | - | 4.49 | 91,705 |
| Countries on the Equator | 0 | - | 4.63 | 141,259 |
| Members of the Arab League | 0 | - | 4.77 | 75,732 |
| Countries with the Oldest Median Age | 0 | - | 4.80 | 70,084 |
| Separatist Movements | 0 | - | 4.45 | 46,050 |
| Countries with the Best Passports | 0 | - | 4.73 | 85,615 |
| Prime Meridian Countries | 0 | - | 4.69 | 59,933 |
| Next Country Alphabetically | 0 | - | 4.70 | 86,453 |
| Westernmost Countries | 0 | - | 4.43 | 62,555 |
| Easternmost Countries | 0 | - | 4.74 | 63,075 |
| Countries With the Most ISIS Fighters | 0 | - | 4.54 | 39,764 |
| Top 10 Most Famous Island Countries | 0 | - | 4.69 | 109,037 |
| Indochina Countries | 0 | - | 4.74 | 66,369 |
| Atlantic Ocean Island Countries | 0 | - | 4.56 | 64,689 |
| Countries With the Most Conflict Deaths | 0 | - | 4.62 | 96,829 |
| Highest Foreign Aid Recipients | 0 | - | 4.67 | 44,033 |
| Pacific Ocean Island Countries | 0 | - | 4.49 | 57,170 |
| Countries with the Most Traffic-Related Deaths | 0 | - | 4.74 | 48,508 |
| Countries with More Sheep than People | 0 | - | 4.48 | 32,075 |
| Countries with the Lowest Obesity Rate | 0 | - | 4.47 | 53,875 |
| Countries that are the Source of Refugees | 0 | - | 4.78 | 75,805 |
| Countries 206 to 242 | 0 | - | 4.74 | 34,086 |
| Most Populous Countries By Category | 0 | - | 4.55 | 85,707 |
| Countries with the Most Turkic People | 0 | - | 4.77 | 45,884 |
| Countries Most-Mentioned by the New York Times, 1900–2018 | 0 | - | 4.74 | 61,777 |
