| Landlocked Countries | 0 | - | 4.99 | 425,744 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,872,118 |
| Sahara Desert Countries | 0 | - | 4.98 | 166,205 |
| Himalayan Countries | 0 | - | 4.93 | 140,205 |
| Andean Countries | 0 | - | 4.94 | 85,422 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 64,571 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 126,961 |
| Coffee Producing Countries | 0 | - | 4.83 | 68,140 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 66,414 |
| Danube Countries | 0 | - | 4.97 | 72,375 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 117,577 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,825 |
| Countries with the Worst Passports | 0 | - | 4.93 | 85,095 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 150,590 |
| European Landlocked Countries | 0 | - | 4.99 | 147,599 |
| Partially Recognized Countries | 0 | - | 4.98 | 107,286 |
| Countries with the Most Species | 0 | - | 4.99 | 103,554 |
| Countries 197 to 205 | 0 | - | 4.90 | 71,394 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,774 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,880 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,834 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,573 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 58,006 |
| Countries in the Alps | 0 | - | 4.87 | 118,762 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 102,607 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 107,841 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,956 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 97,016 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,938 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 96,241 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 101,387 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,854 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,415 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 63,165 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,862 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.91 | 41,738 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,550 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,776 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,880 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 119,816 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,601 |
| Countries that Host the Most Refugees | 0 | - | 4.96 | 68,714 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 46,654 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 245,668 |
| World Countries - Blind Typing | 0 | - | 5.00 | 109,119 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,496 |
| Largest Countries By Category | 0 | - | 4.97 | 158,850 |
| Countries by Countries | 0 | - | 4.96 | 63,635 |
| Country Flags with the Most White | 0 | - | 4.85 | 139,250 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,399 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,665 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 89,099 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,803,861 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 335,341 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 376,666 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 409,654 |
| Island Countries | 0 | - | 4.99 | 712,534 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,054,620 |
| Northernmost Countries | 0 | - | 4.99 | 363,946 |
| Countries of South America | 0 | - | 5.00 | 932,561 |
| Countries of Oceania | 0 | - | 5.00 | 1,063,197 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,888,977 |
| "Land" Countries | 0 | - | 4.98 | 338,359 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 175,129 |
| Countries with Megacities | 0 | - | 4.99 | 267,068 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 200,823 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 114,121 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 139,138 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 82,230 |
| Countries by Official Language | 0 | - | 4.95 | 195,979 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 297,610 |
| Countries in their Native Language | 0 | - | 4.99 | 199,727 |
| Independence from Whom | 0 | - | 4.99 | 213,045 |
| Subdivisions by Country | 0 | - | 4.87 | 50,613 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 133,422 |
| Megadiverse Countries | 0 | - | 4.96 | 135,273 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 132,936 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 55,533 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 126,652 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,228 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 163,951 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,847 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 95,106 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 154,569 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 96,035 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,254 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 78,515 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 108,373 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,441 |
| Countries with the Highest HDI | 0 | - | 4.95 | 137,141 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,575 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,840 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,393,461 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 112,338 |
| World Map Quiz | 0 | - | 4.81 | 65,718 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 159,197 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,710 |
| Countries by Founding Story | 0 | - | 4.95 | 77,789 |
| Countries by Road Signs | 0 | - | 4.98 | 54,341 |
| Southernmost Countries of the World | 0 | - | 4.99 | 229,238 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 106,075 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 123,554 |
| Countries With the Most Languages | 0 | - | 4.90 | 203,556 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.96 | 111,423 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 94,528 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,724 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,688 |
| Tallest Countries North to South | 0 | - | 4.86 | 130,702 |
| Widest Countries East to West | 0 | - | 4.92 | 130,450 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,597 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 187,253 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,515 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 95,060 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,962 |
| Countries with the Most Desert | 0 | - | 4.93 | 128,480 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,502 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,889 |
| Countries with Double Letters | 0 | - | 4.96 | 97,059 |
| Countries that End in N | 0 | - | 4.95 | 171,919 |
| Countries with Five Letters | 0 | - | 4.96 | 283,747 |
| Countries with Six Letters | 0 | - | 4.94 | 214,457 |
| Countries with W | 0 | - | 4.96 | 160,919 |
| Countries with Z | 0 | - | 4.98 | 292,432 |
| Countries with Letters Missing | 0 | - | 4.96 | 187,280 |
| Countries That End in U | 0 | - | 4.95 | 121,183 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 135,093 |
| Countries that End in O | 0 | - | 4.92 | 160,210 |
| Countries that End in R | 0 | - | 4.87 | 119,179 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,935 |
| Countries Ending in "IA" | 0 | - | 4.99 | 209,822 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 171,146 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,825 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 142,750 |
| Countries That End in Y | 0 | - | 4.91 | 186,086 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 198,446 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 153,271 |
| Countries that End in I | 0 | - | 4.94 | 135,313 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 184,614 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 96,055 |
| Countries That End in NIA | 0 | - | 4.92 | 110,050 |
| Countries That End in BIA | 0 | - | 4.93 | 149,572 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 167,534 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,769 |
| Countries That End in RIA | 0 | - | 4.93 | 127,053 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 111,387 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 228,581 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 134,182 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 126,622 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 92,169 |
| Add A Letter - Make a Country | 0 | - | 4.81 | 74,803 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 53,327 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,537 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,903 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,649 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,722 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 54,416 |
| Countries that End in L | 0 | - | 4.94 | 157,125 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 217,985 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,342 |
| City to Country Quiz #1 | 0 | - | 4.97 | 157,506 |
| City to Country Quiz #3 | 0 | - | 4.88 | 119,990 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 79,446 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 250,420 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 201,133 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 143,431 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 164,257 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 225,968 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 153,208 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 71,237 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,827 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 63,242 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,454,018 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 382,461 |
| One Border Countries | 0 | - | 4.98 | 471,914 |
| Top Producing Countries | 0 | - | 4.63 | 116,411 |
| ISO Country Codes | 0 | - | 4.49 | 91,670 |
| Countries on the Equator | 0 | - | 4.63 | 141,232 |
| Members of the Arab League | 0 | - | 4.77 | 75,716 |
| Countries with the Oldest Median Age | 0 | - | 4.80 | 70,059 |
| Separatist Movements | 0 | - | 4.45 | 46,041 |
| Countries with the Best Passports | 0 | - | 4.73 | 85,571 |
| Prime Meridian Countries | 0 | - | 4.69 | 59,920 |
| Next Country Alphabetically | 0 | - | 4.70 | 86,436 |
| Westernmost Countries | 0 | - | 4.43 | 62,543 |
| Easternmost Countries | 0 | - | 4.74 | 63,066 |
| Countries With the Most ISIS Fighters | 0 | - | 4.54 | 39,755 |
| Top 10 Most Famous Island Countries | 0 | - | 4.69 | 108,996 |
| Indochina Countries | 0 | - | 4.74 | 66,346 |
| Atlantic Ocean Island Countries | 0 | - | 4.56 | 64,681 |
| Countries With the Most Conflict Deaths | 0 | - | 4.62 | 96,810 |
| Highest Foreign Aid Recipients | 0 | - | 4.67 | 44,027 |
| Pacific Ocean Island Countries | 0 | - | 4.49 | 57,165 |
| Countries with the Most Traffic-Related Deaths | 0 | - | 4.74 | 48,491 |
| Countries with More Sheep than People | 0 | - | 4.48 | 32,043 |
| Countries with the Lowest Obesity Rate | 0 | - | 4.47 | 53,855 |
| Countries that are the Source of Refugees | 0 | - | 4.78 | 75,597 |
| Countries 206 to 242 | 0 | - | 4.74 | 34,071 |
| Most Populous Countries By Category | 0 | - | 4.55 | 85,679 |
| Countries with the Most Turkic People | 0 | - | 4.77 | 45,871 |
| Countries Most-Mentioned by the New York Times, 1900–2018 | 0 | - | 4.74 | 61,762 |
