| Landlocked Countries | 0 | - | 4.99 | 424,775 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,802,627 |
| Sahara Desert Countries | 0 | - | 4.98 | 165,749 |
| Himalayan Countries | 0 | - | 4.93 | 139,861 |
| Andean Countries | 0 | - | 4.94 | 85,226 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 64,400 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 126,715 |
| Coffee Producing Countries | 0 | - | 4.83 | 67,965 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 66,271 |
| Danube Countries | 0 | - | 4.97 | 72,292 |
| Countries With an "Ish" Demonym | 0 | - | 4.98 | 117,445 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,733 |
| Countries with the Worst Passports | 0 | - | 4.93 | 84,906 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 150,407 |
| European Landlocked Countries | 0 | - | 4.99 | 147,487 |
| Partially Recognized Countries | 0 | - | 4.98 | 107,131 |
| Countries with the Most Species | 0 | - | 4.99 | 103,504 |
| Countries 197 to 205 | 0 | - | 4.90 | 71,276 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,719 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,829 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,767 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,500 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,925 |
| Countries in the Alps | 0 | - | 4.87 | 118,634 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 102,395 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 107,653 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,894 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,921 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,845 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 96,155 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 101,284 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,790 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,359 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 63,089 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,803 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.91 | 41,674 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,469 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,706 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,798 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 119,576 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,537 |
| Countries that Host the Most Refugees | 0 | - | 4.96 | 65,612 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 46,521 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 245,295 |
| World Countries - Blind Typing | 0 | - | 5.00 | 108,907 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,451 |
| Largest Countries By Category | 0 | - | 4.97 | 158,703 |
| Countries by Countries | 0 | - | 4.96 | 63,536 |
| Country Flags with the Most White | 0 | - | 4.85 | 139,140 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,369 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,646 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 89,008 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,797,980 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 334,641 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 376,396 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 409,117 |
| Island Countries | 0 | - | 4.99 | 712,175 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,053,578 |
| Northernmost Countries | 0 | - | 4.99 | 363,534 |
| Countries of South America | 0 | - | 5.00 | 931,272 |
| Countries of Oceania | 0 | - | 5.00 | 1,061,612 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,886,151 |
| "Land" Countries | 0 | - | 4.98 | 338,140 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 174,884 |
| Countries with Megacities | 0 | - | 4.99 | 266,573 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 200,588 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,969 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 138,892 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 82,072 |
| Countries by Official Language | 0 | - | 4.95 | 195,822 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 297,383 |
| Countries in their Native Language | 0 | - | 4.99 | 199,604 |
| Independence from Whom | 0 | - | 4.99 | 212,844 |
| Subdivisions by Country | 0 | - | 4.87 | 50,575 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 133,278 |
| Megadiverse Countries | 0 | - | 4.96 | 135,211 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 132,806 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 55,492 |
| Countries with Multiple Big Islands | 0 | - | 4.92 | 126,398 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,196 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 163,478 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,784 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,978 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 154,521 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,783 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,230 |
| Countries by Sports League Revenue | 0 | - | 4.95 | 78,299 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 108,326 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,390 |
| Countries with the Highest HDI | 0 | - | 4.95 | 137,112 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,533 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,650 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,391,327 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 112,103 |
| World Map Quiz | 0 | - | 4.81 | 65,538 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 158,749 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,613 |
| Countries by Founding Story | 0 | - | 4.95 | 77,709 |
| Southernmost Countries of the World | 0 | - | 4.99 | 229,048 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 105,977 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 123,457 |
| Countries With the Most Languages | 0 | - | 4.90 | 203,312 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.96 | 111,313 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 94,440 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,637 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,633 |
| Tallest Countries North to South | 0 | - | 4.86 | 130,349 |
| Widest Countries East to West | 0 | - | 4.92 | 130,351 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,576 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 187,147 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,480 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,997 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,889 |
| Countries with the Most Desert | 0 | - | 4.93 | 128,386 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,469 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,871 |
| Countries with Double Letters | 0 | - | 4.96 | 96,859 |
| Countries that End in N | 0 | - | 4.95 | 171,744 |
| Countries with Five Letters | 0 | - | 4.96 | 283,477 |
| Countries with Six Letters | 0 | - | 4.94 | 214,222 |
| Countries with W | 0 | - | 4.96 | 160,794 |
| Countries with Z | 0 | - | 4.98 | 292,207 |
| Countries with Letters Missing | 0 | - | 4.96 | 187,143 |
| Countries That End in U | 0 | - | 4.95 | 121,100 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 134,955 |
| Countries that End in O | 0 | - | 4.92 | 159,743 |
| Countries that End in R | 0 | - | 4.87 | 119,128 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,885 |
| Countries Ending in "IA" | 0 | - | 4.99 | 209,653 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 171,039 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,746 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 142,673 |
| Countries That End in Y | 0 | - | 4.91 | 186,042 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 198,338 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 153,169 |
| Countries that End in I | 0 | - | 4.94 | 135,261 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 184,504 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,996 |
| Countries That End in NIA | 0 | - | 4.92 | 109,985 |
| Countries That End in BIA | 0 | - | 4.93 | 149,504 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 167,419 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,694 |
| Countries That End in RIA | 0 | - | 4.93 | 127,001 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 111,288 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 228,364 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 134,063 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 126,502 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 92,069 |
| Add A Letter - Make a Country | 0 | - | 4.81 | 74,759 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 53,252 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,516 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,814 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,597 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,620 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 54,302 |
| Countries that End in L | 0 | - | 4.94 | 157,056 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 217,415 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,324 |
| City to Country Quiz #1 | 0 | - | 4.97 | 157,108 |
| City to Country Quiz #3 | 0 | - | 4.88 | 119,724 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 79,331 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 250,282 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 201,043 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 143,370 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 164,169 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 225,861 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 153,140 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 71,208 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,799 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 63,174 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,452,687 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 382,113 |
| One Border Countries | 0 | - | 4.98 | 471,474 |
| Top Producing Countries | 0 | - | 4.63 | 116,382 |
| ISO Country Codes | 0 | - | 4.49 | 91,579 |
| Countries on the Equator | 0 | - | 4.63 | 141,178 |
| Members of the Arab League | 0 | - | 4.77 | 75,702 |
| Countries with the Oldest Median Age | 0 | - | 4.80 | 70,024 |
| Separatist Movements | 0 | - | 4.45 | 45,996 |
| Countries with the Best Passports | 0 | - | 4.73 | 85,498 |
| Prime Meridian Countries | 0 | - | 4.69 | 59,902 |
| Next Country Alphabetically | 0 | - | 4.70 | 86,396 |
| Westernmost Countries | 0 | - | 4.43 | 62,525 |
| Easternmost Countries | 0 | - | 4.74 | 63,052 |
| Countries With the Most ISIS Fighters | 0 | - | 4.54 | 39,741 |
| Top 10 Most Famous Island Countries | 0 | - | 4.69 | 108,927 |
| Indochina Countries | 0 | - | 4.74 | 66,312 |
| Atlantic Ocean Island Countries | 0 | - | 4.56 | 64,673 |
| Countries With the Most Conflict Deaths | 0 | - | 4.62 | 96,634 |
| Highest Foreign Aid Recipients | 0 | - | 4.67 | 44,022 |
| Pacific Ocean Island Countries | 0 | - | 4.49 | 57,154 |
| Countries with the Most Traffic-Related Deaths | 0 | - | 4.74 | 48,479 |
| Countries with More Sheep than People | 0 | - | 4.48 | 31,970 |
| Countries with the Lowest Obesity Rate | 0 | - | 4.47 | 53,825 |
| Countries that are the Source of Refugees | 0 | - | 4.78 | 75,305 |
| Countries 206 to 242 | 0 | - | 4.74 | 34,044 |
| Most Populous Countries By Category | 0 | - | 4.55 | 85,633 |
| Countries with the Most Turkic People | 0 | - | 4.77 | 45,837 |
| Countries Most-Mentioned by the New York Times, 1900–2018 | 0 | - | 4.74 | 61,726 |
| Flyover Countries | 0 | - | 4.69 | 50,966 |
