| Countries of the World in 1900 | 0 | - | 4.89 | 84,825 |
| Countries of the World in 1914 with a Map | 0 | - | 4.99 | 195,124 |
| Countries of Europe in 1444 | 0 | - | 4.92 | 99,684 |
| 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 | 62,455 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,151 |
| Countries by Founding Story | 0 | - | 4.95 | 77,172 |
| Modern-Day Countries of the Umayyad Caliphate on a Map | 0 | - | 4.98 | 68,729 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,827,266 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,621,041 |
| 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 | 47,426,205 |
| Landlocked Countries | 0 | - | 4.99 | 420,033 |
| Save Humanity by Guessing Countries | 0 | - | 4.98 | 571,113 |
| Countries of Europe in 1000 with a Map | 0 | - | 4.78 | 43,200 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,764,689 |
| Most Populous Countries by Year | 0 | - | 4.83 | 110,564 |
| First Countries to Reach 5 Million People | 0 | - | 4.92 | 135,228 |
| Most Populous Modern-Day Countries in 1000 AD | 0 | - | 4.88 | 76,173 |
| Most Populous Modern-Day Countries in 1 AD | 0 | - | 4.98 | 92,712 |
| Most Populous Modern-Day Countries in 1800 AD | 0 | - | 4.93 | 67,233 |
| 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 | 163,488 |
| Himalayan Countries | 0 | - | 4.95 | 137,908 |
| Andean Countries | 0 | - | 4.95 | 84,171 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 63,379 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 124,961 |
| Coffee Producing Countries | 0 | - | 4.83 | 67,036 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,484 |
| Danube Countries | 0 | - | 4.97 | 71,774 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 116,715 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,172 |
| Countries with the Worst Passports | 0 | - | 4.94 | 83,873 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 148,962 |
| European Landlocked Countries | 0 | - | 4.99 | 146,908 |
| Partially Recognized Countries | 0 | - | 4.98 | 106,302 |
| Countries with the Most Species | 0 | - | 4.99 | 103,045 |
| Countries 197 to 205 | 0 | - | 4.89 | 70,452 |
| 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 | 59,403 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,081 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,470 |
| Countries in the Alps | 0 | - | 4.87 | 117,892 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 97,602 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 106,612 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,510 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,396 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,244 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 95,806 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,408 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,291 |
| 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 | 104,020 |
| 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 | 59,648 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 45,716 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 242,951 |
| World Countries - Blind Typing | 0 | - | 5.00 | 107,535 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,069 |
| Largest Countries By Category | 0 | - | 4.97 | 157,847 |
| 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 | 138,390 |
| Warsaw Pact Countries | 0 | - | 4.83 | 84,492 |
| 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 | 329,946 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 374,925 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 405,977 |
| Island Countries | 0 | - | 4.99 | 710,215 |
| Modern-Day Countries of the Khmer Empire on a Map | 0 | - | 4.77 | 45,525 |
| Modern-Day Countries of the Mayan Civilization | 0 | - | 4.77 | 33,372 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,047,367 |
| Northernmost Countries | 0 | - | 4.99 | 361,034 |
| Countries of South America | 0 | - | 5.00 | 924,508 |
| Countries of Oceania | 0 | - | 5.00 | 1,053,353 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,870,490 |
| "Land" Countries | 0 | - | 4.98 | 336,093 |
| 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 | 3,378,522 |
| 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 | 150,154 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,933 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 173,359 |
| Countries with Megacities | 0 | - | 4.99 | 262,943 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 199,195 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,175 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 137,498 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 81,215 |
| Countries by Official Language | 0 | - | 4.95 | 194,860 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 295,835 |
| Countries in their Native Language | 0 | - | 4.99 | 198,398 |
| 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 | 55,235 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,817 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,052 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 162,854 |
| 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 | 89,064 |
| 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 | 71,396 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 110,537 |
| 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 | 53,767 |
| Southernmost Countries of the World | 0 | - | 4.99 | 227,716 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 105,054 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,776 |
| Countries With the Most Languages | 0 | - | 4.90 | 201,667 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,658 |
| 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 | 186,113 |
| 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 | 94,872 |
| Countries with Double Letters | 0 | - | 4.97 | 95,315 |
| Countries that End in N | 0 | - | 4.95 | 170,345 |
| Countries with Five Letters | 0 | - | 4.96 | 281,175 |
| Countries with Six Letters | 0 | - | 4.94 | 212,758 |
| Countries with W | 0 | - | 4.97 | 159,678 |
| Countries with Z | 0 | - | 4.98 | 290,567 |
| 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 | 208,560 |
| 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 | 134,931 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 183,681 |
| 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 | 227,012 |
| 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 | 116,957 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 53,682 |
| Countries that End in L | 0 | - | 4.94 | 156,630 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 214,623 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,185 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,901 |
