| Axis Occupied Countries of WWII | 0 | - | 4.99 | 228,528 |
| Countries in World War I | 0 | - | 4.88 | 227,669 |
| Countries in World War II | 0 | - | 4.54 | 909,774 |
| Important Cities in WWII | 0 | - | 4.42 | 93,289 |
| Battle to Country | 0 | - | 4.91 | 53,048 |
| Cities Bombed During WWII | 0 | - | 4.08 | 30,072 |
| Countries by Percent WWII Deaths | 0 | - | 4.07 | 29,935 |
| The Dictator Files: Adolf Hitler | 0 | - | 4.79 | 77,708 |
| WWII First Names | 0 | - | 4.44 | 41,716 |
| Modern-Day Countries of the Holy Roman Empire on a Map | 0 | - | 4.93 | 45,501 |
| World Leaders of the World Wars | 0 | - | 4.35 | 37,779 |
| Communist Countries in History | 0 | - | 4.63 | 494,495 |
| Europe Map Quiz | 0 | - | 5.00 | 4,750,974 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,319 |
| Name the English Monarchs | 0 | - | 4.91 | 500,878 |
| Independence from Whom | 0 | - | 4.99 | 211,093 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,536 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,302 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,795 |
| World Map Quiz | 0 | - | 4.81 | 64,331 |
| Countries by Founding Story | 0 | - | 4.95 | 76,976 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,445,321 |
| Oceania Map Quiz | 0 | - | 4.98 | 639,615 |
| Africa Map Quiz | 0 | - | 5.00 | 2,112,883 |
| Asia Map Quiz | 0 | - | 4.99 | 912,880 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,523 |
| Countries that Have Won the Most Battles | 0 | - | 4.02 | 39,497 |
| Middle East Map Quiz | 0 | - | 4.99 | 1,380,191 |
| United States Map Quiz | 0 | - | 4.98 | 4,150,793 |
| Australia Map Quiz | 0 | - | 4.95 | 343,571 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 363,684 |
| Cities by Former Name | 0 | - | 4.84 | 91,352 |
| Recently Independent Countries | 0 | - | 4.98 | 158,717 |
| Countries of the World in 1900 | 0 | - | 4.89 | 84,370 |
| Countries of the World in 1914 with a Map | 0 | - | 4.99 | 194,471 |
| Countries of the World in 1945 with a Map | 0 | - | 5.00 | 150,125 |
| Countries by Former Name | 0 | - | 4.99 | 124,813 |
| Historical City to Country | 0 | - | 4.84 | 78,384 |
| Canada Provinces Map Quiz | 0 | - | 4.99 | 638,558 |
| South America Map Quiz | 0 | - | 5.00 | 1,546,154 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 50,366 |
| South and Central Asia Map Quiz | 0 | - | 4.93 | 98,439 |
| Western Africa Map Quiz | 0 | - | 4.97 | 73,508 |
| WWII for Dummies | 0 | - | 4.79 | 104,594 |
| Countries Settled by Vikings | 0 | - | 4.93 | 121,192 |
| Countries with the Most Christians | 0 | - | 4.92 | 142,569 |
| Warsaw Pact Countries | 0 | - | 4.83 | 84,426 |
| Least Christian Countries with Exceptions | 0 | - | 4.90 | 87,725 |
| Countries of Europe in 1444 | 0 | - | 4.92 | 99,351 |
| Countries of the World in 1444 | 0 | - | 4.98 | 60,004 |
| Modern-Day Countries of the Inca Empire on a Map | 0 | - | 4.83 | 57,221 |
| Countries of Europe before World War II with a Map | 0 | - | 4.95 | 52,964 |
| Central America and Caribbean Map Quiz | 0 | - | 4.89 | 901,238 |
| Latin American Countries Map Quiz | 0 | - | 4.97 | 129,102 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 86,888 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,618 |
| North America Map Quiz | 0 | - | 4.98 | 247,233 |
| Africa Cities Map Quiz | 0 | - | 4.97 | 98,793 |
| East Asia Cities Map Quiz | 0 | - | 4.96 | 109,995 |
| UK Cities Map Quiz | 0 | - | 4.96 | 463,752 |
| Former Flags | 0 | - | 4.97 | 107,362 |
| Modern Day Countries of the Kushan Empire on a Map | 0 | - | 4.89 | 24,753 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,869 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 232,247 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 166,427 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.85 | 109,525 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 91,955 |
| Category Elimination - Asian Geography #2 | 0 | - | 4.94 | 96,217 |
| Biggest US Cities by Decade | 0 | - | 4.95 | 167,568 |
| Largest City on Every Continent A-Z | 0 | - | 4.97 | 38,013 |
| Divided World City Name Puzzle #1 | 0 | - | 4.87 | 48,510 |
| Divided World City Name Puzzle #2 | 0 | - | 4.83 | 36,791 |
| Capitals of Countries with the Biggest Economies | 0 | - | 4.93 | 94,993 |
| Category Elimination - Capital Cities #1 | 0 | - | 4.87 | 132,329 |
| Category Elimination - Capital Cities #2 | 0 | - | 4.89 | 80,110 |
| World Capitals in the Answer | 0 | - | 4.94 | 76,743 |
| European Capital Superlatives - Top 2 | 0 | - | 4.94 | 80,990 |
| Countries with the Most Catholics | 0 | - | 4.90 | 108,896 |
| Orthodox Countries | 0 | - | 4.92 | 131,133 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 198,358 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 119,916 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.85 | 120,595 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.93 | 91,602 |
| Flags of Countries of the World in 1910 | 0 | - | 4.96 | 78,550 |
| Monarchies of Europe | 0 | - | 4.90 | 97,833 |
| Monarchies of Asia | 0 | - | 4.97 | 70,909 |
| Modern-Day Countries of the Umayyad Caliphate on a Map | 0 | - | 4.98 | 68,546 |
| Countries Mentioned in the Bible | 0 | - | 4.96 | 66,691 |
| Asian Country Superlatives | 0 | - | 4.83 | 80,722 |
| Political Movements by Country | 0 | - | 4.46 | 72,428 |
| "Stan" Countries - Map Quiz | 0 | - | 4.98 | 135,027 |
| Five Countries with Most Christians by Continent | 0 | - | 4.99 | 111,311 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,760 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 126,648 |
| Top 10 Coldest Asian Countries | 0 | - | 4.95 | 122,758 |
| Countries Bordering the Mediterranean - Map Quiz | 0 | - | 4.87 | 88,823 |
| Regions of France Map Quiz | 0 | - | 4.97 | 143,988 |
| States of Germany Map Quiz | 0 | - | 4.91 | 132,394 |
| Provinces of China Map Quiz | 0 | - | 4.91 | 93,322 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 185,226 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 148,974 |
| Brazil States Map Quiz | 0 | - | 4.85 | 47,771 |
| Counties of England Map Quiz | 0 | - | 4.97 | 306,894 |
| Caribbean / Lesser Antilles Map Quiz | 0 | - | 4.99 | 147,380 |
| Mexico States Map Quiz | 0 | - | 4.85 | 104,341 |
| France Cities Map Quiz | 0 | - | 4.96 | 166,257 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 125,774 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 96,573 |
| China Cities Map Quiz | 0 | - | 4.93 | 104,820 |
| Australia Cities Map Quiz | 0 | - | 4.83 | 145,046 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 151,687 |
| North American Capitals - Map Quiz | 0 | - | 4.87 | 57,607 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,495 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,071 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,727 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 76,005 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,146 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,614 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,497 |
| The Vietnam War | 0 | - | 4.44 | 35,452 |
| WWII Geography | 0 | - | 4.81 | 120,021 |
| Ancient City to Country | 0 | - | 4.70 | 107,872 |
| City-States | 0 | - | 4.53 | 37,208 |
| Damaged and Destroyed Cities | 0 | - | 4.44 | 44,605 |
| City Where It Happened #2 | 0 | - | 4.42 | 53,064 |
| City Where It Happened #3 | 0 | - | 4.53 | 40,360 |
| Most Guessed European Capitals | 0 | - | 4.87 | 101,405 |
| Name a World Capital A-Z | 0 | - | 5.00 | 175,698 |
| Countries by Independence Day | 0 | - | 4.61 | 52,697 |
| National Founders | 0 | - | 4.40 | 83,768 |
| Former Countries by Capital | 0 | - | 4.45 | 127,310 |
| Former Countries | 0 | - | 4.75 | 133,073 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 89,649 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.93 | 82,753 |
| Top 10 Richest Countries in Africa | 0 | - | 4.85 | 75,661 |
| Top 10 Richest Countries in Europe | 0 | - | 4.90 | 149,003 |
| Biggest Trading Partners - European Union | 0 | - | 4.91 | 72,533 |
| States of India Map Quiz | 0 | - | 4.83 | 26,309 |
| Mexico Cities Map Quiz | 0 | - | 4.83 | 37,879 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 60,837 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 85,990 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 645,450 |
| Name that Greek Letter | 0 | - | 4.93 | 322,876 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,201 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,712 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,536 |
| Most Guessed U.S. Cities | 0 | - | 4.89 | 105,626 |
| U.S. Cities with the Biggest Economies | 0 | - | 4.84 | 72,539 |
| Cities Where Famous People Died | 0 | - | 4.47 | 33,103 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,252,336 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 237,040 |
| Hindu Countries | 0 | - | 4.86 | 49,937 |
| Countries of Europe in 1000 with a Map | 0 | - | 4.78 | 43,022 |
| Five Most Guessed Country Flags by Continent | 0 | - | 4.98 | 53,428 |
| Countries with the Most Hindus | 0 | - | 4.90 | 122,748 |
| Biggest Trading Partners - Turkey | 0 | - | 4.81 | 50,473 |
| Topological Map of Asia Quiz | 0 | - | 4.81 | 20,045 |
| Roman Provinces on a Map | 0 | - | 4.54 | 36,806 |
| Zone 1 London Underground Stations - With a Map | 0 | - | 4.90 | 52,215 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 124,367 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 125,254 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,766 |
| The Trojan War | 0 | - | 4.83 | 39,619 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,386 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 125,319 |
| Places Where Winston Churchill Said We Would Fight the Nazis | 0 | - | 4.57 | 14,589 |
| The American Civil War | 0 | - | 4.62 | 52,334 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,360 |
| Roman Emperors | 0 | - | 4.95 | 119,517 |
| British History A-Z #1 | 0 | - | 4.45 | 46,355 |
| Boundary Waters | 0 | - | 4.92 | 88,326 |
| Countries Along the Afro-Eurasia Coast | 0 | - | 4.85 | 35,038 |
| The Same Suffixes - Geography | 0 | - | 4.98 | 95,789 |
| 100 Geography Questions of Varying Difficulty | 0 | - | 4.94 | 62,004 |
| "Second Best" Geography Edition #2 | 0 | - | 4.88 | 60,253 |
| "Second Best" Geography Edition #3 | 0 | - | 4.90 | 70,176 |
| Cities by Founder and Date | 0 | - | 4.56 | 29,081 |
| City Where It Happened #1 | 0 | - | 4.24 | 106,258 |
| World Capitals Quiz | 0 | - | 5.00 | 5,057,400 |
| Landlocked Countries | 0 | - | 4.99 | 417,802 |
| Countries Unconquered since 1850 | 0 | - | 4.32 | 64,764 |
| Guerrillas by Country | 0 | - | 4.40 | 41,057 |
| Longest Uninterrupted Democracies | 0 | - | 4.04 | 33,160 |
| Most Recent Country To ... | 0 | - | 4.33 | 55,584 |
| Countries with the Most Cathedrals | 0 | - | 4.51 | 44,883 |
| Save Humanity by Guessing Countries | 0 | - | 4.98 | 565,078 |
| Modern-Day Countries of the Khmer Empire on a Map | 0 | - | 4.75 | 45,382 |
| Modern-Day Countries of the Mayan Civilization | 0 | - | 4.77 | 33,247 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,749,367 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 117,902 |
| Countries Closest to Spain A-Z | 0 | - | 4.98 | 108,049 |
| Countries Closest to the United Kingdom A-Z | 0 | - | 4.96 | 190,518 |
| Biggest Trading Partners - Colombia | 0 | - | 4.88 | 40,188 |
| Tolkien's Middle Earth Map Quiz | 0 | - | 4.92 | 37,551 |
| MLB Cities Map Quiz | 0 | - | 4.50 | 69,282 |
| European Cities Beginning with B - Click Map | 0 | - | 4.77 | 77,868 |
| Famous Immigrants and Exiles | 0 | - | 4.45 | 23,239 |
| Colonies of Africa with a Map | 0 | - | 4.78 | 54,285 |
| Random Sequential Oceanic Countries on a Map | 0 | - | 4.97 | 27,065 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 73,375 |
