| Landlocked Countries | 0 | - | 4.99 | 426,215 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,902,793 |
| Sahara Desert Countries | 0 | - | 4.98 | 166,425 |
| Himalayan Countries | 0 | - | 4.93 | 140,381 |
| Andean Countries | 0 | - | 4.94 | 85,539 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 64,695 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 127,123 |
| Coffee Producing Countries | 0 | - | 4.83 | 68,262 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 66,496 |
| Danube Countries | 0 | - | 4.97 | 72,438 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 117,643 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,873 |
| Countries with the Worst Passports | 0 | - | 4.93 | 85,203 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 150,680 |
| European Landlocked Countries | 0 | - | 4.99 | 147,640 |
| Partially Recognized Countries | 0 | - | 4.98 | 107,352 |
| Countries with the Most Species | 0 | - | 4.99 | 103,590 |
| Countries 197 to 205 | 0 | - | 4.90 | 71,453 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,786 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,898 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,860 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,597 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 58,043 |
| Countries in the Alps | 0 | - | 4.87 | 118,826 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 102,714 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 107,941 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,985 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 97,057 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,994 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 96,289 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 101,438 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,889 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,447 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 63,210 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,899 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.91 | 41,760 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,585 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,824 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,916 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 119,923 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,637 |
| Countries that Host the Most Refugees | 0 | - | 4.96 | 74,634 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 46,715 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 245,849 |
| World Countries - Blind Typing | 0 | - | 5.00 | 109,226 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,533 |
| Largest Countries By Category | 0 | - | 4.97 | 158,906 |
| Countries by Countries | 0 | - | 4.96 | 63,672 |
| Country Flags with the Most White | 0 | - | 4.85 | 139,301 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,414 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,680 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 89,130 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,806,455 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 335,710 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 376,773 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 409,867 |
| Island Countries | 0 | - | 4.99 | 712,674 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,055,105 |
| Northernmost Countries | 0 | - | 4.99 | 364,178 |
| Countries of South America | 0 | - | 5.00 | 933,118 |
| Countries of Oceania | 0 | - | 5.00 | 1,063,976 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,890,283 |
| "Land" Countries | 0 | - | 4.98 | 338,465 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 175,253 |
| Countries with Megacities | 0 | - | 4.99 | 267,309 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 200,933 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 114,188 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 139,254 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 82,302 |
| Countries by Official Language | 0 | - | 4.95 | 196,059 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 297,707 |
| Countries in their Native Language | 0 | - | 4.99 | 199,793 |
| Independence from Whom | 0 | - | 4.99 | 213,149 |
| Subdivisions by Country | 0 | - | 4.87 | 50,633 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 133,509 |
| Megadiverse Countries | 0 | - | 4.96 | 135,301 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 132,990 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 55,549 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 126,725 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,233 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 164,317 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,872 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 95,150 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 154,578 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 96,098 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,265 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 78,598 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 108,397 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,456 |
| Countries with the Highest HDI | 0 | - | 4.95 | 137,160 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,596 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,896 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,394,671 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 112,434 |
| World Map Quiz | 0 | - | 4.81 | 65,783 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 159,432 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,738 |
| Countries by Founding Story | 0 | - | 4.95 | 77,831 |
| Countries by Road Signs | 0 | - | 4.98 | 54,376 |
| Southernmost Countries of the World | 0 | - | 4.99 | 229,328 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 106,128 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 123,600 |
| Countries With the Most Languages | 0 | - | 4.90 | 203,665 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.96 | 111,473 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 94,578 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,777 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,714 |
| Tallest Countries North to South | 0 | - | 4.85 | 130,795 |
| Widest Countries East to West | 0 | - | 4.92 | 130,722 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,608 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 187,284 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,526 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 95,080 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 149,013 |
| Countries with the Most Desert | 0 | - | 4.93 | 128,509 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,512 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,900 |
| Countries with Double Letters | 0 | - | 4.96 | 97,155 |
| Countries that End in N | 0 | - | 4.95 | 172,026 |
| Countries with Five Letters | 0 | - | 4.96 | 284,071 |
| Countries with Six Letters | 0 | - | 4.94 | 214,568 |
| Countries with W | 0 | - | 4.96 | 161,009 |
| Countries with Z | 0 | - | 4.98 | 292,545 |
| Countries with Letters Missing | 0 | - | 4.96 | 187,346 |
| Countries That End in U | 0 | - | 4.95 | 121,222 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 135,164 |
| Countries that End in O | 0 | - | 4.92 | 160,250 |
| Countries that End in R | 0 | - | 4.87 | 119,202 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,967 |
| Countries Ending in "IA" | 0 | - | 4.99 | 209,919 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 171,199 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,864 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 142,787 |
| Countries That End in Y | 0 | - | 4.91 | 186,104 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 198,506 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 153,305 |
| Countries that End in I | 0 | - | 4.94 | 135,339 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 184,671 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 96,081 |
| Countries That End in NIA | 0 | - | 4.92 | 110,088 |
| Countries That End in BIA | 0 | - | 4.93 | 149,610 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 167,581 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,796 |
| Countries That End in RIA | 0 | - | 4.93 | 127,078 |
| Most Common Words in Official Country Names | 0 | - | 4.85 | 111,423 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 228,674 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 134,231 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 126,673 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 92,219 |
| Add A Letter - Make a Country | 0 | - | 4.81 | 74,826 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 53,352 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,548 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,940 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,666 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,769 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 54,468 |
| Countries that End in L | 0 | - | 4.94 | 157,160 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 218,144 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,355 |
| City to Country Quiz #1 | 0 | - | 4.97 | 157,554 |
| City to Country Quiz #3 | 0 | - | 4.88 | 120,032 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 79,477 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 250,495 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 201,178 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 143,455 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 164,311 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 226,014 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 153,240 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 71,255 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,844 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 63,273 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,454,600 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 382,616 |
| One Border Countries | 0 | - | 4.98 | 472,104 |
| Top Producing Countries | 0 | - | 4.63 | 116,428 |
| ISO Country Codes | 0 | - | 4.49 | 91,700 |
| Countries on the Equator | 0 | - | 4.63 | 141,254 |
| Members of the Arab League | 0 | - | 4.77 | 75,730 |
| Countries with the Oldest Median Age | 0 | - | 4.80 | 70,078 |
| Separatist Movements | 0 | - | 4.45 | 46,048 |
| Countries with the Best Passports | 0 | - | 4.73 | 85,606 |
| Prime Meridian Countries | 0 | - | 4.69 | 59,930 |
| Next Country Alphabetically | 0 | - | 4.70 | 86,450 |
| Westernmost Countries | 0 | - | 4.43 | 62,552 |
| Easternmost Countries | 0 | - | 4.74 | 63,073 |
| Countries With the Most ISIS Fighters | 0 | - | 4.54 | 39,762 |
| Top 10 Most Famous Island Countries | 0 | - | 4.69 | 109,029 |
| Indochina Countries | 0 | - | 4.74 | 66,366 |
| Atlantic Ocean Island Countries | 0 | - | 4.56 | 64,687 |
| Countries With the Most Conflict Deaths | 0 | - | 4.62 | 96,824 |
| Highest Foreign Aid Recipients | 0 | - | 4.67 | 44,032 |
| Pacific Ocean Island Countries | 0 | - | 4.49 | 57,169 |
| Countries with the Most Traffic-Related Deaths | 0 | - | 4.74 | 48,506 |
| Countries with More Sheep than People | 0 | - | 4.48 | 32,073 |
| Countries with the Lowest Obesity Rate | 0 | - | 4.47 | 53,868 |
| Countries that are the Source of Refugees | 0 | - | 4.78 | 75,773 |
| Countries 206 to 242 | 0 | - | 4.74 | 34,082 |
| Most Populous Countries By Category | 0 | - | 4.55 | 85,702 |
| Countries with the Most Turkic People | 0 | - | 4.77 | 45,881 |
| Countries Most-Mentioned by the New York Times, 1900–2018 | 0 | - | 4.74 | 61,773 |
