| Landlocked Countries | 0 | - | 4.99 | 423,342 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,692,801 |
| Sahara Desert Countries | 0 | - | 4.98 | 165,148 |
| Himalayan Countries | 0 | - | 4.94 | 139,336 |
| Andean Countries | 0 | - | 4.94 | 84,941 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 64,162 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 126,324 |
| Coffee Producing Countries | 0 | - | 4.83 | 67,730 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 66,042 |
| Danube Countries | 0 | - | 4.97 | 72,163 |
| Countries With an "Ish" Demonym | 0 | - | 4.98 | 117,241 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,569 |
| Countries with the Worst Passports | 0 | - | 4.93 | 84,604 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 150,110 |
| European Landlocked Countries | 0 | - | 4.99 | 147,319 |
| Partially Recognized Countries | 0 | - | 4.98 | 106,891 |
| Countries with the Most Species | 0 | - | 4.99 | 103,375 |
| Countries 197 to 205 | 0 | - | 4.90 | 71,026 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,661 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,776 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,642 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,401 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,806 |
| Countries in the Alps | 0 | - | 4.87 | 118,422 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 101,903 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 107,354 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,779 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,758 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,667 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 96,066 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,857 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,637 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,267 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,988 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,738 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,611 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,350 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,599 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,670 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 119,251 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,435 |
| Countries that Host the Most Refugees | 0 | - | 4.96 | 64,969 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 46,288 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 244,682 |
| World Countries - Blind Typing | 0 | - | 5.00 | 108,516 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,335 |
| Largest Countries By Category | 0 | - | 4.97 | 158,467 |
| Countries by Countries | 0 | - | 4.96 | 63,392 |
| Country Flags with the Most White | 0 | - | 4.85 | 138,919 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,333 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,602 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 88,830 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,788,418 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 332,807 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 375,951 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 408,225 |
| Island Countries | 0 | - | 4.99 | 711,561 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,051,666 |
| Northernmost Countries | 0 | - | 4.99 | 362,673 |
| Countries of South America | 0 | - | 5.00 | 929,299 |
| Countries of Oceania | 0 | - | 5.00 | 1,059,346 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,881,709 |
| "Land" Countries | 0 | - | 4.98 | 337,730 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 174,329 |
| Countries with Megacities | 0 | - | 4.99 | 265,549 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 200,124 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,691 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 138,386 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 81,761 |
| Countries by Official Language | 0 | - | 4.95 | 195,534 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 296,785 |
| Countries in their Native Language | 0 | - | 4.99 | 199,322 |
| Independence from Whom | 0 | - | 4.99 | 212,424 |
| Subdivisions by Country | 0 | - | 4.87 | 50,504 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 132,977 |
| Megadiverse Countries | 0 | - | 4.96 | 135,121 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 132,341 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,433 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 126,313 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,148 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 163,317 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,672 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,660 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 154,440 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,726 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,194 |
| Countries by Sports League Revenue | 0 | - | 4.95 | 77,984 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,979 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,293 |
| Countries with the Highest HDI | 0 | - | 4.95 | 137,032 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,453 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,575 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,387,263 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 111,660 |
| World Map Quiz | 0 | - | 4.81 | 65,294 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 157,987 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,492 |
| Countries by Founding Story | 0 | - | 4.95 | 77,488 |
| Southernmost Countries of the World | 0 | - | 4.99 | 228,382 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 105,467 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 123,164 |
| Countries With the Most Languages | 0 | - | 4.90 | 202,710 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 111,060 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 94,177 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,428 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,515 |
| Tallest Countries North to South | 0 | - | 4.83 | 121,044 |
| Widest Countries East to West | 0 | - | 4.92 | 129,796 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,487 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 186,933 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,405 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,868 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,749 |
| Countries with the Most Desert | 0 | - | 4.93 | 128,009 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,426 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,828 |
| Countries with Double Letters | 0 | - | 4.96 | 96,560 |
| Countries that End in N | 0 | - | 4.95 | 171,463 |
| Countries with Five Letters | 0 | - | 4.96 | 283,031 |
| Countries with Six Letters | 0 | - | 4.94 | 213,900 |
| Countries with W | 0 | - | 4.96 | 160,566 |
| Countries with Z | 0 | - | 4.98 | 291,819 |
| Countries with Letters Missing | 0 | - | 4.96 | 186,930 |
| Countries That End in U | 0 | - | 4.95 | 120,979 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 134,708 |
| Countries that End in O | 0 | - | 4.92 | 159,632 |
| Countries that End in R | 0 | - | 4.87 | 119,052 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,807 |
| Countries Ending in "IA" | 0 | - | 4.99 | 209,383 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 170,864 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,615 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 142,520 |
| Countries That End in Y | 0 | - | 4.91 | 185,963 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 198,118 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 153,020 |
| Countries that End in I | 0 | - | 4.94 | 135,190 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 184,293 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,902 |
| Countries That End in NIA | 0 | - | 4.92 | 109,871 |
| Countries That End in BIA | 0 | - | 4.93 | 149,349 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 167,269 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,560 |
| Countries That End in RIA | 0 | - | 4.93 | 126,907 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 111,154 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 227,959 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 133,891 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 126,323 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 91,877 |
| Add A Letter - Make a Country | 0 | - | 4.81 | 74,657 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 53,148 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,476 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,659 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,521 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,452 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 54,146 |
| Countries that End in L | 0 | - | 4.94 | 156,956 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 216,441 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,298 |
| City to Country Quiz #1 | 0 | - | 4.97 | 156,121 |
| City to Country Quiz #3 | 0 | - | 4.88 | 119,047 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 79,093 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 250,005 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 200,854 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 143,264 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 164,003 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 225,648 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 153,007 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 71,151 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,746 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 63,075 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,450,456 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 381,507 |
| One Border Countries | 0 | - | 4.98 | 470,684 |
| Top Producing Countries | 0 | - | 4.63 | 116,326 |
| ISO Country Codes | 0 | - | 4.49 | 91,481 |
| Countries on the Equator | 0 | - | 4.63 | 141,081 |
| Members of the Arab League | 0 | - | 4.77 | 75,671 |
| Countries with the Oldest Median Age | 0 | - | 4.80 | 69,980 |
| Separatist Movements | 0 | - | 4.45 | 45,953 |
| Countries with the Best Passports | 0 | - | 4.73 | 85,384 |
| Prime Meridian Countries | 0 | - | 4.69 | 59,865 |
| Next Country Alphabetically | 0 | - | 4.70 | 86,340 |
| Westernmost Countries | 0 | - | 4.43 | 62,493 |
| Easternmost Countries | 0 | - | 4.74 | 63,020 |
| Countries With the Most ISIS Fighters | 0 | - | 4.54 | 39,713 |
| Top 10 Most Famous Island Countries | 0 | - | 4.69 | 108,808 |
| Indochina Countries | 0 | - | 4.74 | 66,266 |
| Atlantic Ocean Island Countries | 0 | - | 4.56 | 64,663 |
| Countries With the Most Conflict Deaths | 0 | - | 4.62 | 96,418 |
| Highest Foreign Aid Recipients | 0 | - | 4.67 | 44,006 |
| Pacific Ocean Island Countries | 0 | - | 4.49 | 57,134 |
| Countries with the Most Traffic-Related Deaths | 0 | - | 4.74 | 48,446 |
| Countries with More Sheep than People | 0 | - | 4.48 | 31,742 |
| Countries with the Lowest Obesity Rate | 0 | - | 4.47 | 53,772 |
| Countries that are the Source of Refugees | 0 | - | 4.78 | 74,468 |
| Countries 206 to 242 | 0 | - | 4.74 | 34,008 |
| Most Populous Countries By Category | 0 | - | 4.55 | 85,546 |
| Countries with the Most Turkic People | 0 | - | 4.75 | 45,776 |
| Countries Most-Mentioned by the New York Times, 1900–2018 | 0 | - | 4.74 | 61,678 |
| Flyover Countries | 0 | - | 4.69 | 50,910 |
