| Landlocked Countries | 0 | - | 4.99 | 420,793 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,480,790 |
| Sahara Desert Countries | 0 | - | 4.98 | 163,868 |
| Himalayan Countries | 0 | - | 4.95 | 138,199 |
| Andean Countries | 0 | - | 4.95 | 84,319 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 63,543 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 125,425 |
| Coffee Producing Countries | 0 | - | 4.83 | 67,169 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,600 |
| Danube Countries | 0 | - | 4.97 | 71,861 |
| Countries With an "Ish" Demonym | 0 | - | 4.98 | 116,833 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,264 |
| Countries with the Worst Passports | 0 | - | 4.94 | 84,030 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 149,487 |
| European Landlocked Countries | 0 | - | 4.99 | 147,001 |
| Partially Recognized Countries | 0 | - | 4.98 | 106,410 |
| Countries with the Most Species | 0 | - | 4.99 | 103,124 |
| Countries 197 to 205 | 0 | - | 4.89 | 70,568 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,521 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,669 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,457 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,134 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,526 |
| Countries in the Alps | 0 | - | 4.87 | 117,997 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 99,894 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 106,779 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,558 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,473 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,343 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 95,847 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,495 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,364 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,095 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,720 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,573 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,429 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,090 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,365 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,390 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 118,599 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,189 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,714 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 45,854 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 243,324 |
| World Countries - Blind Typing | 0 | - | 5.00 | 107,744 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,127 |
| Largest Countries By Category | 0 | - | 4.97 | 157,974 |
| Countries by Countries | 0 | - | 4.96 | 63,048 |
| Country Flags with the Most White | 0 | - | 4.85 | 138,495 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,227 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,522 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 88,540 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,769,373 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 330,503 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 375,127 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 406,426 |
| Island Countries | 0 | - | 4.99 | 710,536 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,048,229 |
| Northernmost Countries | 0 | - | 4.99 | 361,361 |
| Countries of South America | 0 | - | 5.00 | 925,431 |
| Countries of Oceania | 0 | - | 5.00 | 1,054,479 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,872,719 |
| "Land" Countries | 0 | - | 4.98 | 336,819 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 173,554 |
| Countries with Megacities | 0 | - | 4.99 | 263,635 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 199,389 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,295 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 137,667 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 81,333 |
| Countries by Official Language | 0 | - | 4.95 | 194,991 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 296,019 |
| Countries in their Native Language | 0 | - | 4.99 | 198,497 |
| Independence from Whom | 0 | - | 4.99 | 211,772 |
| Subdivisions by Country | 0 | - | 4.86 | 50,377 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 132,062 |
| Megadiverse Countries | 0 | - | 4.96 | 134,905 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 131,841 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,276 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,857 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,066 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 162,948 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,498 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,261 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,952 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,580 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,047 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 77,399 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,802 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,115 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,888 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,261 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,426 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,380,441 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 110,785 |
| World Map Quiz | 0 | - | 4.81 | 64,906 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 156,546 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,216 |
| Countries by Founding Story | 0 | - | 4.95 | 77,245 |
| Southernmost Countries of the World | 0 | - | 4.99 | 227,833 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 105,124 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,850 |
| Countries With the Most Languages | 0 | - | 4.90 | 201,846 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,755 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,889 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,193 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,368 |
| Tallest Countries North to South | 0 | - | 4.83 | 120,464 |
| Widest Countries East to West | 0 | - | 4.92 | 129,531 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,420 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 186,213 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,073 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,654 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,438 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,725 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,323 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,771 |
| Countries with Double Letters | 0 | - | 4.97 | 95,761 |
| Countries that End in N | 0 | - | 4.95 | 170,716 |
| Countries with Five Letters | 0 | - | 4.96 | 281,772 |
| Countries with Six Letters | 0 | - | 4.94 | 213,134 |
| Countries with W | 0 | - | 4.97 | 160,016 |
| Countries with Z | 0 | - | 4.98 | 290,974 |
| Countries with Letters Missing | 0 | - | 4.96 | 186,367 |
| Countries That End in U | 0 | - | 4.95 | 120,665 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 134,163 |
| Countries that End in O | 0 | - | 4.92 | 159,385 |
| Countries that End in R | 0 | - | 4.87 | 118,863 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,634 |
| Countries Ending in "IA" | 0 | - | 4.99 | 208,760 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 170,422 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,293 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,918 |
| Countries That End in Y | 0 | - | 4.91 | 185,781 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 197,610 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 152,674 |
| Countries that End in I | 0 | - | 4.94 | 134,995 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 183,797 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,715 |
| Countries That End in NIA | 0 | - | 4.92 | 109,659 |
| Countries That End in BIA | 0 | - | 4.93 | 149,043 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,926 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,262 |
| Countries That End in RIA | 0 | - | 4.93 | 126,693 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 110,838 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 227,222 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 133,481 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 125,876 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 91,432 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,468 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,868 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,390 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,362 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,322 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,090 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 53,795 |
| Countries that End in L | 0 | - | 4.94 | 156,706 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 214,984 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,223 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,929 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,853 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,900 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 249,488 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 200,449 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 142,838 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 163,380 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 224,902 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 152,743 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 71,031 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,652 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,779 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,446,143 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 380,441 |
| One Border Countries | 0 | - | 4.98 | 468,761 |
| Top Producing Countries | 0 | - | 4.63 | 116,209 |
| ISO Country Codes | 0 | - | 4.48 | 90,298 |
| Countries on the Equator | 0 | - | 4.63 | 140,746 |
| Members of the Arab League | 0 | - | 4.77 | 75,617 |
| Countries with the Oldest Median Age | 0 | - | 4.80 | 69,864 |
| Separatist Movements | 0 | - | 4.44 | 45,872 |
| Countries with the Best Passports | 0 | - | 4.73 | 85,168 |
| Prime Meridian Countries | 0 | - | 4.69 | 59,799 |
| Next Country Alphabetically | 0 | - | 4.70 | 86,236 |
| Westernmost Countries | 0 | - | 4.42 | 62,279 |
| Easternmost Countries | 0 | - | 4.75 | 62,876 |
| Countries With the Most ISIS Fighters | 0 | - | 4.54 | 39,631 |
| Top 10 Most Famous Island Countries | 0 | - | 4.69 | 108,548 |
| Indochina Countries | 0 | - | 4.74 | 66,146 |
| Atlantic Ocean Island Countries | 0 | - | 4.56 | 64,613 |
| Countries With the Most Conflict Deaths | 0 | - | 4.61 | 96,325 |
| Highest Foreign Aid Recipients | 0 | - | 4.67 | 43,970 |
| Pacific Ocean Island Countries | 0 | - | 4.49 | 57,085 |
| Countries with the Most Traffic-Related Deaths | 0 | - | 4.74 | 48,378 |
| Countries with the Lowest Obesity Rate | 0 | - | 4.47 | 53,660 |
| Countries that are the Source of Refugees | 0 | - | 4.68 | 60,868 |
| Countries 206 to 242 | 0 | - | 4.74 | 33,917 |
| Most Populous Countries By Category | 0 | - | 4.55 | 85,399 |
| Countries with the Most Turkic People | 0 | - | 4.75 | 45,669 |
| Countries Most-Mentioned by the New York Times, 1900–2018 | 0 | - | 4.74 | 61,552 |
| Flyover Countries | 0 | - | 4.69 | 50,787 |
| Top 50 Countries by Area - In Order | 0 | - | 4.73 | 73,872 |
