| Axis Occupied Countries of WWII | 0 | - | 4.99 | 229,662 |
| Countries in World War I | 0 | - | 4.88 | 228,708 |
| Countries in World War II | 0 | - | 4.54 | 916,407 |
| Important Cities in WWII | 0 | - | 4.42 | 93,712 |
| Battle to Country | 0 | - | 4.91 | 53,699 |
| Cities Bombed During WWII | 0 | - | 4.09 | 30,244 |
| Countries by Percent WWII Deaths | 0 | - | 4.07 | 30,127 |
| The Dictator Files: Adolf Hitler | 0 | - | 4.79 | 78,160 |
| WWII First Names | 0 | - | 4.44 | 41,901 |
| Modern-Day Countries of the Holy Roman Empire on a Map | 0 | - | 4.93 | 45,820 |
| World Leaders of the World Wars | 0 | - | 4.36 | 37,966 |
| Communist Countries in History | 0 | - | 4.63 | 497,200 |
| Europe Map Quiz | 0 | - | 5.00 | 4,777,719 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,467 |
| Name the English Monarchs | 0 | - | 4.91 | 504,955 |
| Independence from Whom | 0 | - | 4.99 | 212,469 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 133,008 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,678 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,677 |
| World Map Quiz | 0 | - | 4.81 | 65,312 |
| Countries by Founding Story | 0 | - | 4.95 | 77,502 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,450,718 |
| Oceania Map Quiz | 0 | - | 4.98 | 657,194 |
| Africa Map Quiz | 0 | - | 5.00 | 2,124,883 |
| Asia Map Quiz | 0 | - | 4.99 | 922,079 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,962 |
| Countries that Have Won the Most Battles | 0 | - | 4.01 | 39,696 |
| Middle East Map Quiz | 0 | - | 4.99 | 1,385,837 |
| United States Map Quiz | 0 | - | 4.98 | 4,166,413 |
| Australia Map Quiz | 0 | - | 4.95 | 345,598 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 365,525 |
| Cities by Former Name | 0 | - | 4.83 | 91,860 |
| Recently Independent Countries | 0 | - | 4.98 | 159,669 |
| Countries of the World in 1900 | 0 | - | 4.89 | 85,505 |
| Countries of the World in 1914 with a Map | 0 | - | 4.99 | 196,148 |
| Countries of the World in 1945 with a Map | 0 | - | 5.00 | 151,654 |
| Countries by Former Name | 0 | - | 4.99 | 125,521 |
| Historical City to Country | 0 | - | 4.85 | 78,738 |
| Canada Provinces Map Quiz | 0 | - | 4.99 | 642,674 |
| South America Map Quiz | 0 | - | 5.00 | 1,553,333 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 51,121 |
| South and Central Asia Map Quiz | 0 | - | 4.94 | 99,608 |
| Western Africa Map Quiz | 0 | - | 4.97 | 74,361 |
| WWII for Dummies | 0 | - | 4.78 | 105,343 |
| Countries Settled by Vikings | 0 | - | 4.93 | 121,885 |
| Countries with the Most Christians | 0 | - | 4.93 | 144,184 |
| Warsaw Pact Countries | 0 | - | 4.83 | 84,610 |
| Least Christian Countries with Exceptions | 0 | - | 4.90 | 88,762 |
| Countries of Europe in 1444 | 0 | - | 4.92 | 100,235 |
| Countries of the World in 1444 | 0 | - | 4.98 | 60,553 |
| Modern-Day Countries of the Inca Empire on a Map | 0 | - | 4.83 | 57,703 |
| Countries of Europe before World War II with a Map | 0 | - | 4.95 | 53,830 |
| Central America and Caribbean Map Quiz | 0 | - | 4.89 | 903,645 |
| Latin American Countries Map Quiz | 0 | - | 4.97 | 130,326 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,547 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,569 |
| North America Map Quiz | 0 | - | 4.98 | 250,241 |
| Africa Cities Map Quiz | 0 | - | 4.97 | 99,354 |
| East Asia Cities Map Quiz | 0 | - | 4.96 | 110,564 |
| UK Cities Map Quiz | 0 | - | 4.96 | 465,703 |
| Former Flags | 0 | - | 4.97 | 108,189 |
| Modern Day Countries of the Kushan Empire on a Map | 0 | - | 4.89 | 25,135 |
| The Reign of Napoleon | 0 | - | 4.54 | 39,070 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 234,856 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 168,199 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.86 | 110,633 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 92,833 |
| Category Elimination - Asian Geography #2 | 0 | - | 4.94 | 97,348 |
| Biggest US Cities by Decade | 0 | - | 4.95 | 168,737 |
| Largest City on Every Continent A-Z | 0 | - | 4.97 | 38,411 |
| Divided World City Name Puzzle #1 | 0 | - | 4.84 | 49,108 |
| Divided World City Name Puzzle #2 | 0 | - | 4.83 | 37,277 |
| Capitals of Countries with the Biggest Economies | 0 | - | 4.93 | 95,346 |
| Category Elimination - Capital Cities #1 | 0 | - | 4.88 | 133,733 |
| Category Elimination - Capital Cities #2 | 0 | - | 4.89 | 81,007 |
| World Capitals in the Answer | 0 | - | 4.94 | 77,447 |
| European Capital Superlatives - Top 2 | 0 | - | 4.95 | 81,407 |
| Countries with the Most Catholics | 0 | - | 4.90 | 110,041 |
| Orthodox Countries | 0 | - | 4.92 | 132,481 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 200,119 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 120,976 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.87 | 136,291 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 92,553 |
| Flags of Countries of the World in 1910 | 0 | - | 4.96 | 79,247 |
| Monarchies of Europe | 0 | - | 4.90 | 98,542 |
| Monarchies of Asia | 0 | - | 4.97 | 71,346 |
| Modern-Day Countries of the Umayyad Caliphate on a Map | 0 | - | 4.98 | 69,035 |
| Countries Mentioned in the Bible | 0 | - | 4.96 | 67,397 |
| Asian Country Superlatives | 0 | - | 4.84 | 81,136 |
| Political Movements by Country | 0 | - | 4.46 | 72,681 |
| "Stan" Countries - Map Quiz | 0 | - | 4.98 | 136,874 |
| Five Countries with Most Christians by Continent | 0 | - | 4.99 | 112,223 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 193,528 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 127,461 |
| Top 10 Coldest Asian Countries | 0 | - | 4.95 | 123,590 |
| Countries Bordering the Mediterranean - Map Quiz | 0 | - | 4.86 | 89,298 |
| Regions of France Map Quiz | 0 | - | 4.97 | 145,085 |
| States of Germany Map Quiz | 0 | - | 4.92 | 133,430 |
| Provinces of China Map Quiz | 0 | - | 4.92 | 94,164 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 186,489 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 149,919 |
| Brazil States Map Quiz | 0 | - | 4.86 | 48,371 |
| Counties of England Map Quiz | 0 | - | 4.97 | 308,505 |
| Caribbean / Lesser Antilles Map Quiz | 0 | - | 4.99 | 149,577 |
| Mexico States Map Quiz | 0 | - | 4.84 | 105,392 |
| France Cities Map Quiz | 0 | - | 4.96 | 167,427 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 126,838 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,268 |
| China Cities Map Quiz | 0 | - | 4.94 | 105,656 |
| Australia Cities Map Quiz | 0 | - | 4.82 | 146,195 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 152,794 |
| North American Capitals - Map Quiz | 0 | - | 4.88 | 58,405 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,262 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,310 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,991 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 84,373 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,379 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,527 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,303 |
| The Vietnam War | 0 | - | 4.44 | 35,611 |
| WWII Geography | 0 | - | 4.81 | 120,732 |
| Ancient City to Country | 0 | - | 4.70 | 108,226 |
| City-States | 0 | - | 4.53 | 37,345 |
| Damaged and Destroyed Cities | 0 | - | 4.44 | 44,756 |
| City Where It Happened #2 | 0 | - | 4.42 | 53,179 |
| City Where It Happened #3 | 0 | - | 4.53 | 40,516 |
| Most Guessed European Capitals | 0 | - | 4.87 | 101,692 |
| Name a World Capital A-Z | 0 | - | 5.00 | 176,677 |
| Countries by Independence Day | 0 | - | 4.62 | 52,820 |
| National Founders | 0 | - | 4.40 | 83,922 |
| Former Countries by Capital | 0 | - | 4.45 | 127,688 |
| Former Countries | 0 | - | 4.77 | 134,042 |
| Category Elimination - European Countries #1 | 0 | - | 4.90 | 90,682 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.93 | 84,781 |
| Top 10 Richest Countries in Africa | 0 | - | 4.85 | 76,597 |
| Top 10 Richest Countries in Europe | 0 | - | 4.90 | 150,231 |
| Biggest Trading Partners - European Union | 0 | - | 4.91 | 73,069 |
| States of India Map Quiz | 0 | - | 4.83 | 26,730 |
| Mexico Cities Map Quiz | 0 | - | 4.83 | 38,751 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 61,445 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,656 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 650,181 |
| Name that Greek Letter | 0 | - | 4.93 | 324,501 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,526 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,882 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,848 |
| Most Guessed U.S. Cities | 0 | - | 4.89 | 106,650 |
| U.S. Cities with the Biggest Economies | 0 | - | 4.83 | 73,113 |
| Cities Where Famous People Died | 0 | - | 4.47 | 33,217 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,703,632 |
| Commonwealth of Nations Countries | 0 | - | 4.95 | 237,939 |
| Hindu Countries | 0 | - | 4.87 | 50,411 |
| Countries of Europe in 1000 with a Map | 0 | - | 4.78 | 43,473 |
| Five Most Guessed Country Flags by Continent | 0 | - | 4.98 | 54,559 |
| Countries with the Most Hindus | 0 | - | 4.90 | 123,342 |
| Biggest Trading Partners - Turkey | 0 | - | 4.81 | 51,019 |
| Topological Map of Asia Quiz | 0 | - | 4.82 | 20,314 |
| Roman Provinces on a Map | 0 | - | 4.53 | 37,183 |
| Zone 1 London Underground Stations - With a Map | 0 | - | 4.90 | 52,597 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 125,543 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 126,179 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 62,097 |
| The Trojan War | 0 | - | 4.83 | 39,903 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,552 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 126,927 |
| Places Where Winston Churchill Said We Would Fight the Nazis | 0 | - | 4.57 | 14,641 |
| The American Civil War | 0 | - | 4.62 | 52,557 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,393 |
| Roman Emperors | 0 | - | 4.95 | 120,729 |
| British History A-Z #1 | 0 | - | 4.45 | 46,647 |
| Boundary Waters | 0 | - | 4.92 | 88,653 |
| Countries Along the Afro-Eurasia Coast | 0 | - | 4.87 | 35,324 |
| The Same Suffixes - Geography | 0 | - | 4.98 | 96,451 |
| 100 Geography Questions of Varying Difficulty | 0 | - | 4.93 | 62,995 |
| "Second Best" Geography Edition #2 | 0 | - | 4.88 | 60,763 |
| "Second Best" Geography Edition #3 | 0 | - | 4.89 | 70,746 |
| Cities by Founder and Date | 0 | - | 4.56 | 29,141 |
| City Where It Happened #1 | 0 | - | 4.23 | 106,430 |
| World Capitals Quiz | 0 | - | 5.00 | 5,092,593 |
| Landlocked Countries | 0 | - | 4.99 | 423,482 |
| Countries Unconquered since 1850 | 0 | - | 4.32 | 64,912 |
| Guerrillas by Country | 0 | - | 4.40 | 41,187 |
| Longest Uninterrupted Democracies | 0 | - | 4.04 | 33,243 |
| Most Recent Country To ... | 0 | - | 4.33 | 55,810 |
| Countries with the Most Cathedrals | 0 | - | 4.48 | 46,990 |
| Save Humanity by Guessing Countries | 0 | - | 4.98 | 582,070 |
| Modern-Day Countries of the Khmer Empire on a Map | 0 | - | 4.77 | 45,716 |
| Modern-Day Countries of the Mayan Civilization | 0 | - | 4.78 | 33,561 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,789,475 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 118,487 |
| Countries Closest to Spain A-Z | 0 | - | 4.98 | 108,546 |
| Countries Closest to the United Kingdom A-Z | 0 | - | 4.96 | 191,317 |
| Biggest Trading Partners - Colombia | 0 | - | 4.88 | 40,462 |
| Tolkien's Middle Earth Map Quiz | 0 | - | 4.92 | 38,061 |
| MLB Cities Map Quiz | 0 | - | 4.50 | 69,828 |
| European Cities Beginning with B - Click Map | 0 | - | 4.77 | 78,546 |
| Famous Immigrants and Exiles | 0 | - | 4.46 | 23,623 |
| Colonies of Africa with a Map | 0 | - | 4.79 | 54,642 |
| Random Sequential Oceanic Countries on a Map | 0 | - | 4.97 | 27,310 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.98 | 74,852 |
