| Countries of the World in 1900 | 0 | - | 4.89 | 85,895 |
| Countries of the World in 1914 with a Map | 0 | - | 4.99 | 196,654 |
| Countries of Europe in 1444 | 0 | - | 4.92 | 100,509 |
| Countries of the World in 1444 | 0 | - | 4.98 | 60,720 |
| Modern-Day Countries of the Inca Empire on a Map | 0 | - | 4.83 | 57,844 |
| Independence from Whom | 0 | - | 4.99 | 212,966 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 133,366 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,817 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 95,052 |
| Countries by Founding Story | 0 | - | 4.95 | 77,766 |
| Modern-Day Countries of the Umayyad Caliphate on a Map | 0 | - | 4.98 | 69,148 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,847,126 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,650,636 |
| Recently Independent Countries | 0 | - | 4.98 | 160,275 |
| Countries by Former Name | 0 | - | 4.99 | 125,774 |
| Historical City to Country | 0 | - | 4.85 | 78,988 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,844,123 |
| Landlocked Countries | 0 | - | 4.99 | 425,239 |
| Save Humanity by Guessing Countries | 0 | - | 4.98 | 586,988 |
| Countries of Europe in 1000 with a Map | 0 | - | 4.78 | 43,637 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,801,366 |
| Most Populous Countries by Year | 0 | - | 4.83 | 111,343 |
| First Countries to Reach 5 Million People | 0 | - | 4.93 | 135,843 |
| Most Populous Modern-Day Countries in 1000 AD | 0 | - | 4.88 | 76,492 |
| Most Populous Modern-Day Countries in 1 AD | 0 | - | 4.98 | 93,167 |
| Most Populous Modern-Day Countries in 1800 AD | 0 | - | 4.93 | 67,494 |
| Most Populous Modern-Day Countries in 1500 AD | 0 | - | 4.93 | 73,842 |
| Most Populous Modern-Day Countries by Century | 0 | - | 4.98 | 97,728 |
| Sahara Desert Countries | 0 | - | 4.98 | 166,001 |
| Himalayan Countries | 0 | - | 4.93 | 140,032 |
| Andean Countries | 0 | - | 4.94 | 85,323 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 64,476 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 126,842 |
| Coffee Producing Countries | 0 | - | 4.83 | 68,052 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 66,338 |
| Danube Countries | 0 | - | 4.97 | 72,326 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 117,506 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,775 |
| Countries with the Worst Passports | 0 | - | 4.93 | 85,000 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 150,511 |
| European Landlocked Countries | 0 | - | 4.99 | 147,549 |
| Partially Recognized Countries | 0 | - | 4.98 | 107,209 |
| Countries with the Most Species | 0 | - | 4.99 | 103,526 |
| Countries 197 to 205 | 0 | - | 4.90 | 71,337 |
| Countries Settled by Vikings | 0 | - | 4.92 | 122,045 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,754 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,856 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,797 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,531 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,966 |
| Countries in the Alps | 0 | - | 4.87 | 118,698 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 102,505 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 107,762 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,925 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,973 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,892 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 96,197 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 101,337 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,814 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,382 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 63,131 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,829 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.91 | 41,705 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,509 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,739 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,836 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 119,715 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,569 |
| Countries that Host the Most Refugees | 0 | - | 4.96 | 65,718 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 46,612 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 245,497 |
| World Countries - Blind Typing | 0 | - | 5.00 | 109,028 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,477 |
| Largest Countries By Category | 0 | - | 4.97 | 158,790 |
| Countries by Countries | 0 | - | 4.96 | 63,591 |
| Pixelated World Map | 0 | - | 5.00 | 144,043 |
| Country Flags with the Most White | 0 | - | 4.85 | 139,198 |
| Warsaw Pact Countries | 0 | - | 4.83 | 84,674 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,384 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 70,291 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,654 |
| All Countries by Population With a Map | 0 | - | 4.98 | 110,839 |
| Six Degrees of Separation - Countries #1 | 0 | - | 4.96 | 99,379 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 89,057 |
| Countries of the World with a Borderless Map | 0 | - | 4.99 | 82,730 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 335,055 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 376,540 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 409,435 |
| Island Countries | 0 | - | 4.99 | 712,376 |
| Modern-Day Countries of the Khmer Empire on a Map | 0 | - | 4.77 | 45,807 |
| Modern-Day Countries of the Mayan Civilization | 0 | - | 4.78 | 33,666 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,054,221 |
| Northernmost Countries | 0 | - | 4.99 | 363,773 |
| Countries of South America | 0 | - | 5.00 | 931,956 |
| Countries of Oceania | 0 | - | 5.00 | 1,062,505 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,887,743 |
| "Land" Countries | 0 | - | 4.98 | 338,290 |
| Most Populous Countries in 1900 | 0 | - | 4.91 | 174,208 |
| Countries by Independence Day | 0 | - | 4.62 | 52,855 |
| Former Countries by Capital | 0 | - | 4.45 | 127,789 |
| Former Countries | 0 | - | 4.77 | 134,187 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,392,549 |
| Mediterranean Countries with an Empty Map | 0 | - | 4.99 | 105,466 |
| Flags of Countries of the World in 1910 | 0 | - | 4.96 | 79,435 |
| Battle to Country | 0 | - | 4.91 | 53,914 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,290 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,783 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 175,023 |
| Countries with Megacities | 0 | - | 4.99 | 266,867 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 200,737 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 114,044 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 139,054 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 82,169 |
| Countries by Official Language | 0 | - | 4.95 | 195,914 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 297,518 |
| Countries in their Native Language | 0 | - | 4.99 | 199,662 |
| Subdivisions by Country | 0 | - | 4.87 | 50,593 |
| Megadiverse Countries | 0 | - | 4.96 | 135,252 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 132,876 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 55,516 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 126,474 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,215 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 163,588 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 154,549 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,841 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,247 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 78,438 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 108,352 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,422 |
| Countries with the Highest HDI | 0 | - | 4.95 | 137,130 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,560 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,701 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 112,239 |
| World Map Quiz | 0 | - | 4.81 | 65,621 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 159,020 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,669 |
| Countries within the Arctic Circle - Map Quiz | 0 | - | 4.84 | 64,534 |
| Countries by Road Signs | 0 | - | 4.98 | 54,312 |
| Southernmost Countries of the World | 0 | - | 4.99 | 229,166 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 106,016 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 123,512 |
| Countries With the Most Languages | 0 | - | 4.90 | 203,450 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.96 | 111,382 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 94,484 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,683 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,661 |
| Tallest Countries North to South | 0 | - | 4.86 | 130,570 |
| Widest Countries East to West | 0 | - | 4.92 | 130,405 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,586 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 187,198 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,498 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 95,026 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,941 |
| Countries with the Most Desert | 0 | - | 4.93 | 128,431 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,485 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,885 |
| Countries With the Tallest People | 0 | - | 4.93 | 95,178 |
| Countries with Double Letters | 0 | - | 4.96 | 96,992 |
| Countries that End in N | 0 | - | 4.95 | 171,854 |
| Countries with Five Letters | 0 | - | 4.96 | 283,648 |
| Countries with Six Letters | 0 | - | 4.94 | 214,385 |
| Countries with W | 0 | - | 4.96 | 160,884 |
| Countries with Z | 0 | - | 4.98 | 292,345 |
| Countries with Letters Missing | 0 | - | 4.96 | 187,240 |
| Countries That End in U | 0 | - | 4.95 | 121,160 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 135,045 |
| Countries that End in O | 0 | - | 4.92 | 160,186 |
| Countries that End in R | 0 | - | 4.87 | 119,156 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,914 |
| Countries Ending in "IA" | 0 | - | 4.99 | 209,763 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 171,107 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,786 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 142,716 |
| Countries That End in Y | 0 | - | 4.91 | 186,075 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 198,406 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 153,234 |
| Countries that End in I | 0 | - | 4.94 | 135,297 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 184,564 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 96,032 |
| Countries That End in NIA | 0 | - | 4.92 | 110,026 |
| Countries That End in BIA | 0 | - | 4.93 | 149,549 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 167,482 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,740 |
| Countries That End in RIA | 0 | - | 4.93 | 127,033 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 111,355 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 228,498 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 134,126 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 126,562 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 92,130 |
| Add A Letter - Make a Country | 0 | - | 4.81 | 74,783 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 53,300 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,529 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,866 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,637 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,674 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 54,368 |
| Countries that End in L | 0 | - | 4.94 | 157,090 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 217,837 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,338 |
| City to Country Quiz #1 | 0 | - | 4.97 | 157,411 |
