| Landlocked Countries | 0 | - | 4.99 | 421,454 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,540,409 |
| Sahara Desert Countries | 0 | - | 4.98 | 164,187 |
| Himalayan Countries | 0 | - | 4.95 | 138,477 |
| Andean Countries | 0 | - | 4.93 | 84,471 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 63,665 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 125,644 |
| Coffee Producing Countries | 0 | - | 4.83 | 67,295 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,698 |
| Danube Countries | 0 | - | 4.97 | 71,944 |
| Countries With an "Ish" Demonym | 0 | - | 4.98 | 116,934 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,360 |
| Countries with the Worst Passports | 0 | - | 4.93 | 84,188 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 149,651 |
| European Landlocked Countries | 0 | - | 4.99 | 147,069 |
| Partially Recognized Countries | 0 | - | 4.98 | 106,530 |
| Countries with the Most Species | 0 | - | 4.99 | 103,179 |
| Countries 197 to 205 | 0 | - | 4.89 | 70,677 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,551 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,696 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,503 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,181 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,599 |
| Countries in the Alps | 0 | - | 4.87 | 118,119 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 100,720 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 106,936 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,607 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,545 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,430 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 95,904 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,601 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,445 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,144 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,795 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,619 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,482 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,168 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,422 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,468 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 118,763 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,259 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 62,543 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 45,978 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 243,663 |
| World Countries - Blind Typing | 0 | - | 5.00 | 107,940 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,176 |
| Largest Countries By Category | 0 | - | 4.97 | 158,112 |
| Countries by Countries | 0 | - | 4.96 | 63,137 |
| Country Flags with the Most White | 0 | - | 4.85 | 138,610 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,258 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,547 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 88,619 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,774,889 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 331,137 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 375,361 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 406,892 |
| Island Countries | 0 | - | 4.99 | 710,842 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,049,161 |
| Northernmost Countries | 0 | - | 4.99 | 361,726 |
| Countries of South America | 0 | - | 5.00 | 926,572 |
| Countries of Oceania | 0 | - | 5.00 | 1,055,910 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,875,561 |
| "Land" Countries | 0 | - | 4.98 | 337,165 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 173,752 |
| Countries with Megacities | 0 | - | 4.99 | 264,226 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 199,610 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,397 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 137,872 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 81,460 |
| Countries by Official Language | 0 | - | 4.95 | 195,150 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 296,223 |
| Countries in their Native Language | 0 | - | 4.99 | 198,941 |
| Independence from Whom | 0 | - | 4.99 | 211,960 |
| Subdivisions by Country | 0 | - | 4.86 | 50,400 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 132,635 |
| Megadiverse Countries | 0 | - | 4.96 | 134,968 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 131,987 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,320 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 126,034 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,089 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 163,048 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,563 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,389 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,998 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,617 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,095 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 77,577 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,845 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,171 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,931 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,320 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,464 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,382,349 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 111,021 |
| World Map Quiz | 0 | - | 4.81 | 65,018 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 156,988 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,298 |
| Countries by Founding Story | 0 | - | 4.95 | 77,317 |
| Southernmost Countries of the World | 0 | - | 4.99 | 227,992 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 105,216 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,939 |
| Countries With the Most Languages | 0 | - | 4.90 | 202,071 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,829 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,962 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,256 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,409 |
| Tallest Countries North to South | 0 | - | 4.83 | 120,526 |
| Widest Countries East to West | 0 | - | 4.92 | 129,594 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,437 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 186,324 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,101 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,729 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,534 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,805 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,352 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,790 |
| Countries with Double Letters | 0 | - | 4.96 | 96,100 |
| Countries that End in N | 0 | - | 4.95 | 170,985 |
| Countries with Five Letters | 0 | - | 4.96 | 282,180 |
| Countries with Six Letters | 0 | - | 4.94 | 213,413 |
| Countries with W | 0 | - | 4.97 | 160,223 |
| Countries with Z | 0 | - | 4.98 | 291,288 |
| Countries with Letters Missing | 0 | - | 4.96 | 186,584 |
| Countries That End in U | 0 | - | 4.95 | 120,780 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 134,347 |
| Countries that End in O | 0 | - | 4.92 | 159,465 |
| Countries that End in R | 0 | - | 4.87 | 118,930 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,691 |
| Countries Ending in "IA" | 0 | - | 4.99 | 208,952 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 170,617 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,414 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 142,335 |
| Countries That End in Y | 0 | - | 4.91 | 185,839 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 197,819 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 152,779 |
| Countries that End in I | 0 | - | 4.94 | 135,050 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 183,994 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,775 |
| Countries That End in NIA | 0 | - | 4.92 | 109,727 |
| Countries That End in BIA | 0 | - | 4.93 | 149,133 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 167,037 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,368 |
| Countries That End in RIA | 0 | - | 4.93 | 126,769 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 110,955 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 227,436 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 133,617 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 126,013 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 91,580 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,542 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,961 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,427 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,468 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,385 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,213 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 53,909 |
| Countries that End in L | 0 | - | 4.94 | 156,777 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 215,435 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,246 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,984 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,907 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,952 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 249,644 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 200,579 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 142,927 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 163,471 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 225,352 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 152,819 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 71,068 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,687 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,837 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,447,305 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 380,767 |
| One Border Countries | 0 | - | 4.98 | 469,572 |
| Top Producing Countries | 0 | - | 4.63 | 116,244 |
| ISO Country Codes | 0 | - | 4.48 | 91,084 |
| Countries on the Equator | 0 | - | 4.63 | 140,805 |
| Members of the Arab League | 0 | - | 4.77 | 75,629 |
| Countries with the Oldest Median Age | 0 | - | 4.80 | 69,896 |
| Separatist Movements | 0 | - | 4.45 | 45,893 |
| Countries with the Best Passports | 0 | - | 4.73 | 85,235 |
| Prime Meridian Countries | 0 | - | 4.69 | 59,821 |
| Next Country Alphabetically | 0 | - | 4.70 | 86,261 |
| Westernmost Countries | 0 | - | 4.43 | 62,385 |
| Easternmost Countries | 0 | - | 4.75 | 62,933 |
| Countries With the Most ISIS Fighters | 0 | - | 4.54 | 39,652 |
| Top 10 Most Famous Island Countries | 0 | - | 4.69 | 108,621 |
| Indochina Countries | 0 | - | 4.74 | 66,181 |
| Atlantic Ocean Island Countries | 0 | - | 4.56 | 64,627 |
| Countries With the Most Conflict Deaths | 0 | - | 4.61 | 96,354 |
| Highest Foreign Aid Recipients | 0 | - | 4.67 | 43,979 |
| Pacific Ocean Island Countries | 0 | - | 4.49 | 57,091 |
| Countries with the Most Traffic-Related Deaths | 0 | - | 4.74 | 48,390 |
| Countries with the Lowest Obesity Rate | 0 | - | 4.47 | 53,689 |
| Countries that are the Source of Refugees | 0 | - | 4.69 | 63,499 |
| Countries 206 to 242 | 0 | - | 4.74 | 33,946 |
| Most Populous Countries By Category | 0 | - | 4.55 | 85,440 |
| Countries with the Most Turkic People | 0 | - | 4.75 | 45,707 |
| Countries Most-Mentioned by the New York Times, 1900–2018 | 0 | - | 4.74 | 61,585 |
| Flyover Countries | 0 | - | 4.69 | 50,812 |
| Top 50 Countries by Area - In Order | 0 | - | 4.73 | 73,946 |
