| Landlocked Countries | 0 | - | 4.99 | 420,530 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,459,700 |
| Sahara Desert Countries | 0 | - | 4.98 | 163,710 |
| Himalayan Countries | 0 | - | 4.95 | 138,084 |
| Andean Countries | 0 | - | 4.95 | 84,264 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 63,488 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 125,329 |
| Coffee Producing Countries | 0 | - | 4.83 | 67,120 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,562 |
| Danube Countries | 0 | - | 4.97 | 71,835 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 116,792 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,234 |
| Countries with the Worst Passports | 0 | - | 4.94 | 83,970 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 149,423 |
| European Landlocked Countries | 0 | - | 4.99 | 146,964 |
| Partially Recognized Countries | 0 | - | 4.98 | 106,374 |
| Countries with the Most Species | 0 | - | 4.99 | 103,091 |
| Countries 197 to 205 | 0 | - | 4.89 | 70,530 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,506 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,658 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,444 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,115 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,504 |
| Countries in the Alps | 0 | - | 4.87 | 117,957 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 99,447 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 106,710 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,548 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,454 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,306 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 95,831 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,468 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,339 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,076 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,702 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,567 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,420 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,070 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,349 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,365 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 118,541 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,179 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,690 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 45,822 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 243,171 |
| World Countries - Blind Typing | 0 | - | 5.00 | 107,664 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,109 |
| Largest Countries By Category | 0 | - | 4.97 | 157,928 |
| Countries by Countries | 0 | - | 4.97 | 63,012 |
| Country Flags with the Most White | 0 | - | 4.85 | 138,466 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,216 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,510 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 88,509 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,767,620 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 330,284 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 375,043 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 406,236 |
| Island Countries | 0 | - | 4.99 | 710,391 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,047,876 |
| Northernmost Countries | 0 | - | 4.99 | 361,220 |
| Countries of South America | 0 | - | 5.00 | 925,107 |
| Countries of Oceania | 0 | - | 5.00 | 1,054,030 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,871,920 |
| "Land" Countries | 0 | - | 4.98 | 336,390 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 173,467 |
| Countries with Megacities | 0 | - | 4.99 | 263,415 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 199,302 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,244 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 137,600 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 81,286 |
| Countries by Official Language | 0 | - | 4.95 | 194,938 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 295,955 |
| Countries in their Native Language | 0 | - | 4.99 | 198,461 |
| Independence from Whom | 0 | - | 4.99 | 211,717 |
| Subdivisions by Country | 0 | - | 4.86 | 50,361 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,984 |
| Megadiverse Countries | 0 | - | 4.96 | 134,882 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 131,804 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,259 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,846 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,060 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 162,915 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,482 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,221 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,937 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,565 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,042 |
| Countries by Sports League Revenue | 0 | - | 4.95 | 77,344 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,794 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,095 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,871 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,253 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,416 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,379,671 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 110,675 |
| World Map Quiz | 0 | - | 4.81 | 64,864 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 156,417 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,198 |
| Southernmost Countries of the World | 0 | - | 4.99 | 227,784 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 105,095 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,832 |
| Countries With the Most Languages | 0 | - | 4.90 | 201,774 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,725 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,857 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,135 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,353 |
| Tallest Countries North to South | 0 | - | 4.83 | 120,434 |
| Widest Countries East to West | 0 | - | 4.92 | 129,505 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,416 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 186,166 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,063 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,642 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,414 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,707 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,311 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,764 |
| Countries with Double Letters | 0 | - | 4.97 | 95,400 |
| Countries that End in N | 0 | - | 4.95 | 170,436 |
| Countries with Five Letters | 0 | - | 4.96 | 281,390 |
| Countries with Six Letters | 0 | - | 4.94 | 212,848 |
| Countries with W | 0 | - | 4.97 | 159,733 |
| Countries with Z | 0 | - | 4.98 | 290,661 |
| Countries with Letters Missing | 0 | - | 4.96 | 185,997 |
| Countries That End in U | 0 | - | 4.95 | 120,528 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 134,021 |
| Countries that End in O | 0 | - | 4.92 | 159,297 |
| Countries that End in R | 0 | - | 4.87 | 118,810 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,582 |
| Countries Ending in "IA" | 0 | - | 4.99 | 208,633 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 170,340 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,227 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,847 |
| Countries That End in Y | 0 | - | 4.91 | 185,731 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 197,542 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 152,629 |
| Countries that End in I | 0 | - | 4.94 | 134,961 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 183,743 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,674 |
| Countries That End in NIA | 0 | - | 4.92 | 109,634 |
| Countries That End in BIA | 0 | - | 4.93 | 148,989 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,891 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,216 |
| Countries That End in RIA | 0 | - | 4.93 | 126,654 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 110,788 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 227,127 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 133,432 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 125,817 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 91,349 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,425 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,809 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,363 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,306 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,291 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,017 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 53,737 |
| Countries that End in L | 0 | - | 4.94 | 156,668 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 214,833 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,195 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,916 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,831 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,884 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 249,436 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 200,410 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 142,815 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 163,350 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 224,849 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 152,729 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 71,020 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,643 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,767 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,445,719 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 380,350 |
| One Border Countries | 0 | - | 4.98 | 468,623 |
| Top Producing Countries | 0 | - | 4.63 | 116,197 |
| ISO Country Codes | 0 | - | 4.47 | 89,088 |
| Countries on the Equator | 0 | - | 4.63 | 140,732 |
| Members of the Arab League | 0 | - | 4.77 | 75,613 |
| Countries with the Oldest Median Age | 0 | - | 4.80 | 69,850 |
| Separatist Movements | 0 | - | 4.44 | 45,865 |
| Countries with the Best Passports | 0 | - | 4.73 | 85,153 |
| Prime Meridian Countries | 0 | - | 4.69 | 59,792 |
| Next Country Alphabetically | 0 | - | 4.70 | 86,227 |
| Westernmost Countries | 0 | - | 4.42 | 62,209 |
| Easternmost Countries | 0 | - | 4.75 | 62,869 |
| Countries With the Most ISIS Fighters | 0 | - | 4.54 | 39,626 |
| Top 10 Most Famous Island Countries | 0 | - | 4.69 | 108,528 |
| Indochina Countries | 0 | - | 4.74 | 66,135 |
| Atlantic Ocean Island Countries | 0 | - | 4.56 | 64,610 |
| Countries With the Most Conflict Deaths | 0 | - | 4.61 | 96,311 |
| Highest Foreign Aid Recipients | 0 | - | 4.67 | 43,970 |
| Pacific Ocean Island Countries | 0 | - | 4.49 | 57,078 |
| Countries with the Most Traffic-Related Deaths | 0 | - | 4.74 | 48,366 |
| Countries with the Lowest Obesity Rate | 0 | - | 4.47 | 53,651 |
| Countries that are the Source of Refugees | 0 | - | 4.68 | 60,862 |
| Countries 206 to 242 | 0 | - | 4.74 | 33,906 |
| Most Populous Countries By Category | 0 | - | 4.55 | 85,385 |
| Countries with the Most Turkic People | 0 | - | 4.75 | 45,652 |
| Countries Most-Mentioned by the New York Times, 1900–2018 | 0 | - | 4.74 | 61,541 |
| Flyover Countries | 0 | - | 4.69 | 50,779 |
| Top 50 Countries by Area - In Order | 0 | - | 4.73 | 73,853 |
| Countries with the Most Coral Reefs | 0 | - | 4.77 | 48,515 |
