| Flags of Countries of the World in 1910 | 0 | - | 4.96 | 79,593 |
| Battle to Country | 0 | - | 4.91 | 54,101 |
| Independence from Whom | 0 | - | 4.99 | 213,394 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 133,653 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,924 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 95,273 |
| Countries by Founding Story | 0 | - | 4.95 | 77,904 |
| Recently Independent Countries | 0 | - | 4.98 | 160,502 |
| Countries of the World in 1900 | 0 | - | 4.89 | 86,168 |
| Countries of the World in 1914 with a Map | 0 | - | 4.99 | 197,063 |
| Countries of the World in 1945 with a Map | 0 | - | 5.00 | 152,438 |
| Countries by Former Name | 0 | - | 4.99 | 125,967 |
| Historical City to Country | 0 | - | 4.85 | 79,097 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,965,309 |
| Most Populous Countries by Year | 0 | - | 4.83 | 111,602 |
| First Countries to Reach 5 Million People | 0 | - | 4.93 | 136,010 |
| Most Populous Modern-Day Countries in 1000 AD | 0 | - | 4.88 | 76,605 |
| Most Populous Modern-Day Countries in 1 AD | 0 | - | 4.98 | 93,278 |
| Most Populous Modern-Day Countries in 1800 AD | 0 | - | 4.93 | 67,571 |
| Most Populous Modern-Day Countries in 1500 AD | 0 | - | 4.93 | 73,921 |
| Most Populous Modern-Day Countries by Century | 0 | - | 4.98 | 97,865 |
| Countries in World War I | 0 | - | 4.88 | 229,414 |
| Axis Occupied Countries of WWII | 0 | - | 4.99 | 230,427 |
| Countries Settled by Vikings | 0 | - | 4.92 | 122,167 |
| World Map without 12 Countries | 0 | - | 4.97 | 346,443 |
| Countries with the Most Christians | 0 | - | 4.93 | 144,922 |
| Warsaw Pact Countries | 0 | - | 4.83 | 84,724 |
| Least Christian Countries with Exceptions | 0 | - | 4.90 | 89,334 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 70,715 |
| Countries of Europe in 1444 | 0 | - | 4.92 | 100,739 |
| Modern-Day Countries of the Inca Empire on a Map | 0 | - | 4.83 | 57,974 |
| Country Shapes Quiz #1 | 0 | - | 4.93 | 910,211 |
| Country Shapes Quiz #2 | 0 | - | 4.97 | 418,815 |
| Every Country Shape | 0 | - | 5.00 | 472,406 |
| Landlocked Countries | 0 | - | 4.99 | 427,202 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,812,007 |
| Flags of Countries With More Than 100 Million People | 0 | - | 4.98 | 160,101 |
| Most Populous Countries in 1900 | 0 | - | 4.91 | 174,360 |
| World Map without 12 Countries #2 | 0 | - | 4.98 | 174,928 |
| World Map without 12 Countries #3 | 0 | - | 4.98 | 139,647 |
| Countries with the Most Catholics | 0 | - | 4.90 | 110,617 |
| Orthodox Countries | 0 | - | 4.92 | 132,945 |
| Monarchies of Europe | 0 | - | 4.90 | 99,020 |
| Monarchies of Asia | 0 | - | 4.97 | 71,600 |
| Modern-Day Countries of the Umayyad Caliphate on a Map | 0 | - | 4.98 | 69,286 |
| Asian Country Superlatives | 0 | - | 4.84 | 81,348 |
| Country Shapes Quiz #3 | 0 | - | 4.90 | 297,668 |
| Country Shapes Quiz #4 | 0 | - | 4.94 | 227,044 |
| Country Shapes Quiz #5 | 0 | - | 4.93 | 165,405 |
| Recognize Countries by Tripoint Maps #1 | 0 | - | 4.99 | 40,316 |
| Recognize Countries by Tripoint Maps #2 | 0 | - | 4.98 | 34,673 |
| Country Shapes in the World Map #3 | 0 | - | 4.99 | 105,253 |
| Country Shapes in the World Map #2 | 0 | - | 4.99 | 112,229 |
| Country Shapes in the World Map #1 | 0 | - | 4.99 | 123,093 |
| Country Shapes in the World Map #4 | 0 | - | 4.98 | 109,025 |
| Country Shapes in the World Map #6 | 0 | - | 4.98 | 81,202 |
| Country Shapes in the World Map #7 | 0 | - | 4.99 | 58,729 |
| Country Shapes in the World Map #5 | 0 | - | 4.98 | 86,452 |
| Cartoon Versions of Countries | 0 | - | 4.99 | 95,882 |
| Country Shapes Under the Sea | 0 | - | 5.00 | 78,318 |
| A Square of Merged Countries #1 | 0 | - | 4.89 | 60,181 |
| Five Countries with Most Christians by Continent | 0 | - | 4.99 | 112,687 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 336,573 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 377,029 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 410,337 |
| Island Countries | 0 | - | 4.99 | 712,998 |
| Sahara Desert Countries | 0 | - | 4.98 | 166,889 |
| Himalayan Countries | 0 | - | 4.93 | 140,802 |
| Andean Countries | 0 | - | 4.94 | 85,788 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 64,908 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 127,476 |
| Coffee Producing Countries | 0 | - | 4.83 | 68,457 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 66,684 |
| Danube Countries | 0 | - | 4.97 | 72,546 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 117,795 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,970 |
| Countries with the Worst Passports | 0 | - | 4.93 | 85,429 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 150,908 |
| European Landlocked Countries | 0 | - | 4.99 | 147,735 |
| Partially Recognized Countries | 0 | - | 4.98 | 107,530 |
| Countries with the Most Species | 0 | - | 4.99 | 103,642 |
| Countries 197 to 205 | 0 | - | 4.90 | 71,631 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,812 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,951 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,923 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,677 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 58,125 |
| Countries in the Alps | 0 | - | 4.87 | 118,966 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 102,979 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 108,122 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 79,053 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 97,168 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 117,123 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 96,387 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 101,586 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,987 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,512 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 63,309 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,951 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.91 | 41,829 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,668 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,920 |
| Countries with the Most Grassland | 0 | - | 4.94 | 78,017 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 120,136 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,729 |
| Countries that Host the Most Refugees | 0 | - | 4.96 | 76,411 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 46,831 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 246,275 |
| World Countries - Blind Typing | 0 | - | 5.00 | 109,481 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,611 |
| Largest Countries By Category | 0 | - | 4.97 | 159,079 |
| Countries by Countries | 0 | - | 4.97 | 63,799 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,396,910 |
| Country Flags with the Most White | 0 | - | 4.85 | 139,431 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,448 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,704 |
| All Countries by Population With a Map | 0 | - | 4.98 | 111,407 |
| Six Degrees of Separation - Countries #1 | 0 | - | 4.96 | 99,545 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 89,221 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,056,102 |
| Northernmost Countries | 0 | - | 4.99 | 364,573 |
| Countries of South America | 0 | - | 5.00 | 934,210 |
| Countries of Oceania | 0 | - | 5.00 | 1,065,418 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,892,845 |
| "Land" Countries | 0 | - | 4.98 | 338,979 |
| Biggest Countries by Population - Shape Quiz | 0 | - | 4.91 | 57,861 |
| Countries by Independence Day | 0 | - | 4.62 | 52,880 |
| Former Countries by Capital | 0 | - | 4.45 | 127,887 |
| Former Countries | 0 | - | 4.77 | 134,315 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 117,090 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 200,950 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 121,474 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.87 | 137,699 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 92,942 |
| Countries Connected in the World Map #2 | 0 | - | 4.97 | 81,351 |
| Countries Connected in the World Map #1 | 0 | - | 4.97 | 78,013 |
| Countries Connected in the World Map #3 | 0 | - | 4.97 | 77,247 |
| Countries in a Ring of the World Map | 0 | - | 4.99 | 155,699 |
| Countries in a Strip of the World Map | 0 | - | 4.99 | 74,263 |
| Countries in a Stewart of the World Map | 0 | - | 4.99 | 55,630 |
| Communist Countries in History | 0 | - | 4.63 | 498,713 |
| World Map Without 20 Random Countries | 0 | - | 4.99 | 8,413,132 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 194,044 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 127,929 |
| Top 10 Coldest Asian Countries | 0 | - | 4.95 | 123,809 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,455,954 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 382,953 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 175,481 |
| Countries with Megacities | 0 | - | 4.99 | 267,813 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 201,131 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 114,333 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 139,461 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 82,428 |
| Countries by Official Language | 0 | - | 4.95 | 196,207 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 297,928 |
| Countries in World War II | 0 | - | 4.54 | 920,190 |
| Countries in their Native Language | 0 | - | 4.99 | 199,949 |
| Subdivisions by Country | 0 | - | 4.87 | 50,664 |
| Megadiverse Countries | 0 | - | 4.96 | 148,940 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 133,130 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 55,573 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 126,802 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,257 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 164,465 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 154,622 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 96,162 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,286 |
| Countries with Four Letters - Shape Quiz | 0 | - | 4.97 | 102,031 |
| Countries by Sports League Revenue | 0 | - | 4.95 | 78,756 |
| Landmarks of Countries #1 | 0 | - | 4.89 | 108,483 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,504 |
| Countries with the Highest HDI | 0 | - | 4.95 | 137,216 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,637 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,972 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 112,714 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 73,103 |
| World Map Quiz | 0 | - | 4.81 | 65,923 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 159,873 |
| Countries in an Empty Ring of the World Map | 0 | - | 4.92 | 127,393 |
| Category Elimination - European Countries #1 | 0 | - | 4.90 | 91,249 |
| Smallest Countries with at Least One Border | 0 | - | 4.88 | 107,813 |
| Countries within the Arctic Circle - Map Quiz | 0 | - | 4.84 | 64,720 |
| Countries by Road Signs | 0 | - | 4.98 | 54,442 |
| Country Picture Puzzle Game #1 | 0 | - | 4.86 | 86,945 |
| Every European Country Shape | 0 | - | 4.96 | 203,237 |
| Every Asian Country Shape | 0 | - | 4.95 | 88,704 |
| Every African Country Shape | 0 | - | 4.90 | 88,597 |
| One Border Countries - Shape Quiz | 0 | - | 4.84 | 65,282 |
| Merged Country Shapes Quiz #1 | 0 | - | 4.93 | 59,750 |
| Merged Country Shapes Quiz #2 | 0 | - | 4.92 | 60,556 |
| Merged Country Shapes Quiz #3 | 0 | - | 4.87 | 42,346 |
| Country Flag-Shape Picture Quiz #1 | 0 | - | 4.94 | 95,518 |
| Country Flag-Shape Picture Quiz #2 | 0 | - | 4.90 | 73,359 |
| Country Flag-Shape Picture Quiz #4 | 0 | - | 4.96 | 72,214 |
| Country Flag-Shape Picture Quiz #6 | 0 | - | 4.98 | 70,227 |
| Country Flag-Shape Picture Quiz #5 | 0 | - | 4.97 | 62,227 |
| Country Flag-Shape Picture Quiz #7 | 0 | - | 4.96 | 59,335 |
| Southernmost Countries of the World | 0 | - | 4.99 | 229,503 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 106,229 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 123,702 |
