| Countries of the World in 1900 | 0 | - | 4.89 | 84,827 |
| Countries of the World in 1914 with a Map | 0 | - | 4.99 | 195,125 |
| Countries of Europe in 1444 | 0 | - | 4.92 | 99,685 |
| Countries of the World in 1444 | 0 | - | 4.98 | 60,232 |
| Modern-Day Countries of the Inca Empire on a Map | 0 | - | 4.83 | 57,411 |
| Independence from Whom | 0 | - | 4.99 | 211,620 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,913 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,456 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,151 |
| Countries by Founding Story | 0 | - | 4.95 | 77,173 |
| Modern-Day Countries of the Umayyad Caliphate on a Map | 0 | - | 4.98 | 68,729 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,827,283 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,621,061 |
| Recently Independent Countries | 0 | - | 4.98 | 159,183 |
| Countries by Former Name | 0 | - | 4.99 | 125,082 |
| Historical City to Country | 0 | - | 4.84 | 78,510 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,426,635 |
| Landlocked Countries | 0 | - | 4.99 | 420,037 |
| Save Humanity by Guessing Countries | 0 | - | 4.98 | 571,146 |
| Countries of Europe in 1000 with a Map | 0 | - | 4.78 | 43,201 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,764,724 |
| Most Populous Countries by Year | 0 | - | 4.83 | 110,565 |
| First Countries to Reach 5 Million People | 0 | - | 4.92 | 135,228 |
| Most Populous Modern-Day Countries in 1000 AD | 0 | - | 4.88 | 76,174 |
| Most Populous Modern-Day Countries in 1 AD | 0 | - | 4.98 | 92,713 |
| Most Populous Modern-Day Countries in 1800 AD | 0 | - | 4.93 | 67,235 |
| Most Populous Modern-Day Countries in 1500 AD | 0 | - | 4.93 | 73,523 |
| Most Populous Modern-Day Countries by Century | 0 | - | 4.98 | 97,203 |
| Sahara Desert Countries | 0 | - | 4.98 | 163,491 |
| Himalayan Countries | 0 | - | 4.95 | 137,909 |
| Andean Countries | 0 | - | 4.95 | 84,172 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 63,381 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 124,966 |
| Coffee Producing Countries | 0 | - | 4.83 | 67,038 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,486 |
| Danube Countries | 0 | - | 4.97 | 71,775 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 116,717 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,172 |
| Countries with the Worst Passports | 0 | - | 4.94 | 83,875 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 148,970 |
| European Landlocked Countries | 0 | - | 4.99 | 146,910 |
| Partially Recognized Countries | 0 | - | 4.98 | 106,304 |
| Countries with the Most Species | 0 | - | 4.99 | 103,045 |
| Countries 197 to 205 | 0 | - | 4.89 | 70,453 |
| Countries Settled by Vikings | 0 | - | 4.93 | 121,397 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,470 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,638 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,404 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,082 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,471 |
| Countries in the Alps | 0 | - | 4.87 | 117,895 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 97,680 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 106,613 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,512 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,398 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,244 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 95,807 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,409 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,292 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,044 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,659 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,549 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,390 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,021 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,312 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,321 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 118,447 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,141 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,649 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 45,717 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 242,953 |
| World Countries - Blind Typing | 0 | - | 5.00 | 107,536 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,069 |
| Largest Countries By Category | 0 | - | 4.97 | 157,849 |
| Countries by Countries | 0 | - | 4.97 | 62,961 |
| Pixelated World Map | 0 | - | 5.00 | 143,349 |
| Country Flags with the Most White | 0 | - | 4.85 | 138,391 |
| Warsaw Pact Countries | 0 | - | 4.83 | 84,493 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,194 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 69,104 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,498 |
| All Countries by Population With a Map | 0 | - | 4.98 | 108,929 |
| Six Degrees of Separation - Countries #1 | 0 | - | 4.96 | 98,760 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 88,454 |
| Countries of the World with a Borderless Map | 0 | - | 4.99 | 82,108 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 329,951 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 374,926 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 405,985 |
| Island Countries | 0 | - | 4.99 | 710,219 |
| Modern-Day Countries of the Khmer Empire on a Map | 0 | - | 4.77 | 45,526 |
| Modern-Day Countries of the Mayan Civilization | 0 | - | 4.77 | 33,373 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,047,376 |
| Northernmost Countries | 0 | - | 4.99 | 361,038 |
| Countries of South America | 0 | - | 5.00 | 924,513 |
| Countries of Oceania | 0 | - | 5.00 | 1,053,374 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,870,502 |
| "Land" Countries | 0 | - | 4.98 | 336,094 |
| Most Populous Countries in 1900 | 0 | - | 4.91 | 173,707 |
| Countries by Independence Day | 0 | - | 4.61 | 52,731 |
| Former Countries by Capital | 0 | - | 4.45 | 127,453 |
| Former Countries | 0 | - | 4.75 | 133,763 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,378,537 |
| Mediterranean Countries with an Empty Map | 0 | - | 4.99 | 105,052 |
| Flags of Countries of the World in 1910 | 0 | - | 4.96 | 78,814 |
| Battle to Country | 0 | - | 4.91 | 53,292 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,155 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,933 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 173,362 |
| Countries with Megacities | 0 | - | 4.99 | 262,947 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 199,196 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,176 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 137,500 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 81,216 |
| Countries by Official Language | 0 | - | 4.95 | 194,861 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 295,837 |
| Countries in their Native Language | 0 | - | 4.99 | 198,399 |
| Subdivisions by Country | 0 | - | 4.86 | 50,341 |
| Megadiverse Countries | 0 | - | 4.96 | 134,848 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 131,734 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,236 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,818 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,052 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 162,856 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,911 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,545 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,030 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 77,272 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,779 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,065 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,846 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,228 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,399 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 110,539 |
| World Map Quiz | 0 | - | 4.81 | 64,797 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 156,193 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,154 |
| Countries within the Arctic Circle - Map Quiz | 0 | - | 4.85 | 63,896 |
| Countries by Road Signs | 0 | - | 4.98 | 53,769 |
| Southernmost Countries of the World | 0 | - | 4.99 | 227,717 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 105,055 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,777 |
| Countries With the Most Languages | 0 | - | 4.90 | 201,668 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,659 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,796 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,934 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,336 |
| Tallest Countries North to South | 0 | - | 4.83 | 120,400 |
| Widest Countries East to West | 0 | - | 4.92 | 129,465 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,410 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 186,114 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,042 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,606 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,367 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,664 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,292 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,752 |
| Countries With the Tallest People | 0 | - | 4.93 | 94,873 |
| Countries with Double Letters | 0 | - | 4.97 | 95,315 |
| Countries that End in N | 0 | - | 4.95 | 170,346 |
| Countries with Five Letters | 0 | - | 4.96 | 281,177 |
| Countries with Six Letters | 0 | - | 4.94 | 212,758 |
| Countries with W | 0 | - | 4.97 | 159,678 |
| Countries with Z | 0 | - | 4.98 | 290,568 |
| Countries with Letters Missing | 0 | - | 4.96 | 185,944 |
| Countries That End in U | 0 | - | 4.95 | 120,501 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 133,947 |
| Countries that End in O | 0 | - | 4.92 | 159,273 |
| Countries that End in R | 0 | - | 4.87 | 118,794 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,561 |
| Countries Ending in "IA" | 0 | - | 4.99 | 208,561 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 170,294 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,197 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,798 |
| Countries That End in Y | 0 | - | 4.91 | 185,703 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 197,475 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 152,571 |
| Countries that End in I | 0 | - | 4.94 | 134,932 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 183,682 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,651 |
| Countries That End in NIA | 0 | - | 4.92 | 109,603 |
| Countries That End in BIA | 0 | - | 4.93 | 148,959 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,860 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,182 |
| Countries That End in RIA | 0 | - | 4.93 | 126,616 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 110,750 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 227,014 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 133,378 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 125,765 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 91,307 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,399 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,773 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,351 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,262 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,269 |
| Countries with the Word "And" | 0 | - | 4.99 | 116,958 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 53,682 |
| Countries that End in L | 0 | - | 4.94 | 156,631 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 214,627 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,185 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,902 |
