| Prime Ministers of the UK | 0 | - | 4.95 | 442,622 |
| Prime Ministers of Australia | 0 | - | 4.51 | 32,210 |
| Canadian Prime Ministers | 0 | - | 4.64 | 57,954 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.87 | 137,475 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,727,633 |
| Paramount Leaders of China | 0 | - | 4.36 | 11,134 |
| Country by Photo of its Leader | 0 | - | 4.70 | 124,677 |
| The Dictator Files: Chairman Mao | 0 | - | 4.28 | 20,758 |
| Hindu Countries | 0 | - | 4.87 | 50,609 |
| Soviet Leaders 1917–1991 | 0 | - | 4.44 | 95,604 |
| Biggest Trading Partners - Turkey | 0 | - | 4.81 | 51,232 |
| Biggest Trading Partners - China | 0 | - | 4.95 | 75,535 |
| National Founders | 0 | - | 4.40 | 83,981 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 428,641 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 383,702 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,477 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,539 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,866 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 193,871 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,901 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,439 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 85,667 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,869 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.97 | 71,914 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,631 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.46 | 26,944 |
| "Stan" Countries - Map Quiz | 0 | - | 4.98 | 137,607 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 104,636 |
| Political Movements by Country | 0 | - | 4.46 | 72,790 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 80,159 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,151 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 73,123 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,867 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,843 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,770 |
| Top 10 Richest Countries in Europe | 0 | - | 4.90 | 151,306 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 200,821 |
| Biggest Trading Partners - European Union | 0 | - | 4.91 | 73,351 |
| Category Elimination - European Countries #1 | 0 | - | 4.90 | 91,149 |
| Countries Italy Declared War On | 0 | - | 4.70 | 46,302 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 61,713 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,918 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,868 |
| Name the English Monarchs | 0 | - | 4.91 | 506,864 |
| Name the Popes Quiz | 0 | - | 4.47 | 139,003 |
| Countries of the Popes | 0 | - | 4.79 | 128,787 |
| Every Asian Country Shape | 0 | - | 4.95 | 88,647 |
| Asian Countries with the Most Christians | 0 | - | 4.86 | 98,039 |
| Top 10 Richest Countries in Asia | 0 | - | 4.69 | 106,698 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 73,057 |
| Prime Ministers of Israel | 0 | - | 3.97 | 18,075 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,592 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 81,751 |
| Countries Bordering India | 0 | - | 4.98 | 163,839 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.69 | 55,677 |
| Countries Closest to India | 0 | - | 4.97 | 103,264 |
| African Countries with the Most Christians | 0 | - | 4.94 | 76,133 |
| Top 10 Richest Countries in Africa | 0 | - | 4.85 | 77,067 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 121,395 |
| Biggest Trading Partners – Australia | 0 | - | 4.93 | 62,051 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,605 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.37 | 48,665 |
| The Trojan War | 0 | - | 4.83 | 40,012 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 652,295 |
| Name that Greek Letter | 0 | - | 4.93 | 325,086 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 113,035 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,623 |
| Roman Emperors | 0 | - | 4.95 | 121,290 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 70,563 |
| Countries Bordering China Since 1914 | 0 | - | 4.92 | 95,871 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 90,013 |
| Modern Day Countries of the Mughal Empire on a Map | 0 | - | 4.43 | 33,873 |
| Biggest Trading Partners - Colombia | 0 | - | 4.88 | 40,568 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 109,586 |
| U.S. Presidents by Event | 0 | - | 4.58 | 35,382 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.62 | 94,679 |
| Presidential Middle Names | 0 | - | 4.41 | 60,754 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,710 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,913 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 35,224 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,641 |
| The American Revolution | 0 | - | 4.52 | 54,367 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 532,688 |
| Neutral European Countries of WWII | 0 | - | 4.92 | 162,416 |
| History of Russia Quiz | 0 | - | 4.47 | 32,009 |
| The Reign of Napoleon | 0 | - | 4.54 | 39,169 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 72,051 |
| Olympian Gods Quiz | 0 | - | 4.96 | 503,966 |
| Ancient Greek Words | 0 | - | 4.93 | 112,547 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 127,659 |
| History of Italy | 0 | - | 4.55 | 32,160 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,577 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,830 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,437 |
| Countries Closest to Spain A-Z | 0 | - | 4.99 | 108,857 |
| Biggest Trading Partners - Spain | 0 | - | 4.92 | 54,011 |
| Invasions of Great Britain | 0 | - | 4.51 | 60,112 |
| Biggest Trading Partners – United Kingdom | 0 | - | 4.93 | 81,014 |
| Countries Closest to the United Kingdom A-Z | 0 | - | 4.96 | 192,064 |
| All UK Parliament Constituencies on a Map | 0 | - | 4.60 | 29,053 |
| Countries of Asia in 1900 | 0 | - | 4.50 | 58,285 |
| Turkmenistan Country Quiz | 0 | - | 4.81 | 26,150 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 83,459 |
| Flags of Countries that Border China | 0 | - | 4.94 | 100,154 |
| Countries with the Most Hindus | 0 | - | 4.90 | 123,611 |
| Colonies of Africa with a Map | 0 | - | 4.79 | 54,791 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 306,281 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 70,612 |
| Category Elimination - U.S. States #1 | 0 | - | 4.88 | 222,551 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 135,680 |
| Midwestern States of the U.S. | 0 | - | 4.88 | 14,180 |
| Europe Map Quiz | 0 | - | 5.00 | 4,789,946 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 35,207 |
| Save Europeans by Guessing Countries | 0 | - | 4.86 | 216,984 |
| Countries of Europe After World War II | 0 | - | 4.99 | 189,511 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 157,568 |
| Countries of the Soviet Union | 0 | - | 4.98 | 195,613 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 75,443 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 439,999 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,826 |
| Pope Facts | 0 | - | 4.39 | 31,402 |
| Asian Countries by First 2 Letters | 0 | - | 4.92 | 280,816 |
| Random Asian Countries on a Map | 0 | - | 4.91 | 171,062 |
| The Vietnam War | 0 | - | 4.44 | 35,663 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 269,485 |
| Communist Countries in History | 0 | - | 4.63 | 498,418 |
| History of South Africa | 0 | - | 4.60 | 17,767 |
| Oceania Map Quiz | 0 | - | 4.98 | 659,760 |
| Australian Capitals | 0 | - | 4.92 | 62,841 |
| History of Mexico | 0 | - | 4.52 | 15,367 |
| United States Map Quiz | 0 | - | 4.98 | 4,172,183 |
| American Political Words | 0 | - | 4.39 | 23,477 |
| U.S. Political Figures by Picture #1 | 0 | - | 4.14 | 26,219 |
| U.S. Political Figures by Picture #2 | 0 | - | 4.10 | 15,566 |
| Female Political Figures by Picture - U.S. | 0 | - | 4.22 | 10,907 |
| U.S. Vice Presidents | 0 | - | 4.39 | 137,077 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,373 |
| U.S. Presidential Running Mates | 0 | - | 4.41 | 28,785 |
| First Ladies of the United States | 0 | - | 4.28 | 85,998 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.42 | 24,077 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,325 |
| U.S. Presidents in Order by First Letter | 0 | - | 4.32 | 77,503 |
| U.S. President Scramble | 0 | - | 4.40 | 117,496 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,370 |
| Add a Letter - Make a U.S. President | 0 | - | 4.58 | 24,105 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,359 |
| Win the 1828 U.S. Presidential Election | 0 | - | 4.31 | 59,276 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 48,095 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,953 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,781 |
| Official European Union Languages | 0 | - | 4.97 | 239,889 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,710 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 431,083 |
| Least Forested Countries in Asia | 0 | - | 4.75 | 64,946 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 94,454 |
| Soviet Union Country Quiz | 0 | - | 4.91 | 81,183 |
| History of Austria | 0 | - | 4.70 | 17,979 |
| Geography of the French Empire | 0 | - | 4.45 | 27,221 |
| The French Revolution | 0 | - | 4.47 | 24,153 |
| History of France | 0 | - | 4.61 | 57,661 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,564 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,635 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,250 |
| Geography of Ancient Greece | 0 | - | 4.69 | 32,054 |
| Mythology A-Z | 0 | - | 4.31 | 37,415 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 20,983 |
| Figures from Greek Mythology | 0 | - | 4.91 | 188,978 |
| Countries in the Byzantine Empire | 0 | - | 4.95 | 72,500 |
| Byzantine History | 0 | - | 4.91 | 29,030 |
| Byzantine Emperors | 0 | - | 4.93 | 14,619 |
| Count in Roman Numerals - 30 Second Sprint | 0 | - | 4.27 | 104,038 |
| History of The Netherlands | 0 | - | 4.46 | 17,560 |
| The Vikings! | 0 | - | 4.46 | 28,412 |
| The Portuguese Empire | 0 | - | 4.58 | 12,113 |
| Arthurian Legend | 0 | - | 4.33 | 25,179 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,472 |
| Countries the UK Declared War On | 0 | - | 4.55 | 123,296 |
| Geography of the British Empire | 0 | - | 4.48 | 39,852 |
| Medieval English History | 0 | - | 4.53 | 43,663 |
| Places Where Winston Churchill Said We Would Fight the Nazis | 0 | - | 4.57 | 14,654 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,452,814 |
| Asia Map Quiz | 0 | - | 4.99 | 925,727 |
| Most Guessed Asian Capitals | 0 | - | 4.51 | 66,043 |
| Top 10 Most Forested Countries in Asia | 0 | - | 4.63 | 63,661 |
| Random Sequential Asian Countries on a Map | 0 | - | 4.99 | 119,636 |
| History of Iran | 0 | - | 4.66 | 16,428 |
| The Iraq War | 0 | - | 4.47 | 15,707 |
| Vietnam War Countries | 0 | - | 4.82 | 94,679 |
| Chinese Inventions | 0 | - | 4.30 | 33,865 |
| History of China | 0 | - | 4.35 | 57,615 |
| History of India | 0 | - | 4.62 | 21,522 |
| Countries that Visit India the Most | 0 | - | 4.74 | 61,276 |
| Africa Map Quiz | 0 | - | 5.00 | 2,129,456 |
| African Countries with the Most Muslims | 0 | - | 4.80 | 101,262 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 95,175 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 47,178 |
| Countries by Founding Story | 0 | - | 4.95 | 77,851 |
| Independence from Whom | 0 | - | 4.99 | 213,202 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 133,552 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,884 |
