| Landlocked Countries | 0 | - | 4.99 | 418,577 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,313,060 |
| Sahara Desert Countries | 0 | - | 4.98 | 162,801 |
| Himalayan Countries | 0 | - | 4.94 | 137,261 |
| Andean Countries | 0 | - | 4.95 | 83,845 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 63,118 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 124,516 |
| Coffee Producing Countries | 0 | - | 4.83 | 66,774 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,299 |
| Danube Countries | 0 | - | 4.97 | 71,615 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 116,493 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,017 |
| Countries with the Worst Passports | 0 | - | 4.94 | 83,580 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 148,647 |
| European Landlocked Countries | 0 | - | 4.99 | 146,730 |
| Partially Recognized Countries | 0 | - | 4.98 | 106,078 |
| Countries with the Most Species | 0 | - | 4.99 | 102,868 |
| Countries 197 to 205 | 0 | - | 4.89 | 70,211 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,421 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,575 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,279 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 72,959 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,334 |
| Countries in the Alps | 0 | - | 4.87 | 117,632 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 95,095 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 106,301 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,385 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 95,948 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,053 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 95,421 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,237 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,151 |
| Largest Country by Body of Water | 0 | - | 4.96 | 57,944 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,520 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,457 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,319 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,896 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,166 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,181 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 118,124 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,039 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,554 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 45,475 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 242,224 |
| World Countries - Blind Typing | 0 | - | 5.00 | 107,140 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 47,971 |
| Largest Countries By Category | 0 | - | 4.97 | 157,579 |
| Countries by Countries | 0 | - | 4.96 | 62,806 |
| Country Flags with the Most White | 0 | - | 4.85 | 138,157 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,148 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,464 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 88,292 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,754,910 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 328,710 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 374,505 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 404,935 |
| Island Countries | 0 | - | 4.99 | 709,612 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,045,718 |
| Northernmost Countries | 0 | - | 4.99 | 360,336 |
| Countries of South America | 0 | - | 5.00 | 922,524 |
| Countries of Oceania | 0 | - | 5.00 | 1,050,505 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,865,478 |
| "Land" Countries | 0 | - | 4.98 | 335,720 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 172,922 |
| Countries with Megacities | 0 | - | 4.99 | 257,385 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 198,781 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 112,928 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 137,071 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 80,933 |
| Countries by Official Language | 0 | - | 4.95 | 194,585 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 295,463 |
| Countries in their Native Language | 0 | - | 4.99 | 198,130 |
| Independence from Whom | 0 | - | 4.99 | 211,239 |
| Subdivisions by Country | 0 | - | 4.86 | 50,273 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,644 |
| Megadiverse Countries | 0 | - | 4.96 | 134,746 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 131,508 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,162 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,733 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,007 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 162,673 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,360 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,923 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,821 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,467 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 44,974 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 76,893 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,695 |
| Countries Furthest from the United States | 0 | - | 4.94 | 88,971 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,757 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,123 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,308 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,375,016 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 110,110 |
| World Map Quiz | 0 | - | 4.81 | 64,466 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 155,464 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,004 |
| Southernmost Countries of the World | 0 | - | 4.99 | 227,440 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 104,895 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,604 |
| Countries With the Most Languages | 0 | - | 4.90 | 201,259 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,485 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,648 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,800 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,246 |
| Tallest Countries North to South | 0 | - | 4.83 | 120,256 |
| Widest Countries East to West | 0 | - | 4.92 | 129,339 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,376 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 185,924 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 97,983 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,490 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,179 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,518 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,222 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,723 |
| Countries with Double Letters | 0 | - | 4.97 | 95,034 |
| Countries that End in N | 0 | - | 4.95 | 169,889 |
| Countries with Five Letters | 0 | - | 4.96 | 279,821 |
| Countries with Six Letters | 0 | - | 4.94 | 212,415 |
| Countries with W | 0 | - | 4.97 | 159,491 |
| Countries with Z | 0 | - | 4.98 | 289,735 |
| Countries with Letters Missing | 0 | - | 4.96 | 185,685 |
| Countries That End in U | 0 | - | 4.95 | 120,388 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 133,707 |
| Countries that End in O | 0 | - | 4.92 | 159,178 |
| Countries that End in R | 0 | - | 4.87 | 118,722 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,501 |
| Countries Ending in "IA" | 0 | - | 4.99 | 208,266 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 170,073 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,062 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,644 |
| Countries That End in Y | 0 | - | 4.90 | 185,637 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 197,184 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 152,389 |
| Countries that End in I | 0 | - | 4.94 | 134,846 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 183,038 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,560 |
| Countries That End in NIA | 0 | - | 4.92 | 109,499 |
| Countries That End in BIA | 0 | - | 4.93 | 148,815 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,676 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,024 |
| Countries That End in RIA | 0 | - | 4.93 | 126,512 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 110,598 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 226,609 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 133,179 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 125,528 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 91,081 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,295 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,652 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,208 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,093 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,181 |
| Countries with the Word "And" | 0 | - | 4.99 | 116,796 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 53,506 |
| Countries that End in L | 0 | - | 4.94 | 156,526 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 213,884 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,150 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,819 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,699 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,753 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 248,723 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 200,127 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 142,585 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 163,078 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 224,569 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 152,554 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 70,940 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,586 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,640 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,442,872 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 379,611 |
| One Border Countries | 0 | - | 4.98 | 467,518 |
| Top Producing Countries | 0 | - | 4.63 | 116,119 |
| ISO Country Codes | 0 | - | 4.45 | 82,343 |
| Countries on the Equator | 0 | - | 4.63 | 140,617 |
| Members of the Arab League | 0 | - | 4.77 | 75,569 |
| Countries with the Oldest Median Age | 0 | - | 4.80 | 69,762 |
| Separatist Movements | 0 | - | 4.44 | 45,799 |
| Countries with the Best Passports | 0 | - | 4.73 | 85,017 |
| Prime Meridian Countries | 0 | - | 4.69 | 59,741 |
| Next Country Alphabetically | 0 | - | 4.70 | 86,136 |
| Westernmost Countries | 0 | - | 4.50 | 54,066 |
| Easternmost Countries | 0 | - | 4.75 | 62,798 |
| Countries With the Most ISIS Fighters | 0 | - | 4.54 | 39,586 |
| Top 10 Most Famous Island Countries | 0 | - | 4.69 | 108,375 |
| Indochina Countries | 0 | - | 4.74 | 66,087 |
| Atlantic Ocean Island Countries | 0 | - | 4.56 | 64,575 |
| Countries With the Most Conflict Deaths | 0 | - | 4.61 | 96,237 |
| Highest Foreign Aid Recipients | 0 | - | 4.67 | 43,947 |
| Pacific Ocean Island Countries | 0 | - | 4.49 | 57,051 |
| Countries with the Most Traffic-Related Deaths | 0 | - | 4.74 | 48,317 |
| Countries with the Lowest Obesity Rate | 0 | - | 4.47 | 53,588 |
| Countries that are the Source of Refugees | 0 | - | 4.68 | 60,770 |
| Countries 206 to 242 | 0 | - | 4.74 | 33,853 |
| Most Populous Countries By Category | 0 | - | 4.55 | 85,258 |
| Countries with the Most Turkic People | 0 | - | 4.75 | 45,590 |
| Countries Most-Mentioned by the New York Times, 1900–2018 | 0 | - | 4.74 | 61,452 |
| Flyover Countries | 0 | - | 4.68 | 50,717 |
| Top 50 Countries by Area - In Order | 0 | - | 4.73 | 73,712 |
| Countries with the Most Coral Reefs | 0 | - | 4.77 | 48,450 |
