| Prime Ministers of the UK | 0 | - | 4.95 | 439,624 |
| Biggest Trading Partners - Turkey | 0 | - | 4.81 | 50,839 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,976 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,590 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.87 | 135,076 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,704,074 |
| Paramount Leaders of China | 0 | - | 4.36 | 11,084 |
| Country by Photo of its Leader | 0 | - | 4.72 | 124,186 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 70,015 |
| The Dictator Files: Chairman Mao | 0 | - | 4.28 | 20,694 |
| Soviet Leaders 1917–1991 | 0 | - | 4.44 | 95,128 |
| Byzantine History | 0 | - | 4.91 | 28,895 |
| Byzantine Emperors | 0 | - | 4.92 | 14,288 |
| Biggest Trading Partners - China | 0 | - | 4.95 | 75,236 |
| National Founders | 0 | - | 4.40 | 83,860 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 426,802 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 382,093 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 32,129 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,216 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,615 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 192,116 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,387 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,585 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 82,813 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,898 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,192 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,030 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,843 |
| "Stan" Countries - Map Quiz | 0 | - | 4.98 | 136,139 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 104,313 |
| Political Movements by Country | 0 | - | 4.46 | 72,585 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,986 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 81,354 |
| African Countries with the Most Christians | 0 | - | 4.94 | 75,701 |
| Top 10 Richest Countries in Africa | 0 | - | 4.85 | 76,359 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 120,710 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 80,010 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,096 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,910 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,822 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,942 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,534 |
| Top 10 Richest Countries in Europe | 0 | - | 4.90 | 149,885 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 199,622 |
| Biggest Trading Partners - European Union | 0 | - | 4.91 | 72,893 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 90,224 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,376 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,819 |
| Name the English Monarchs | 0 | - | 4.91 | 503,399 |
| Name the Popes Quiz | 0 | - | 4.47 | 138,334 |
| Countries of the Popes | 0 | - | 4.79 | 128,243 |
| Every Asian Country Shape | 0 | - | 4.95 | 87,890 |
| Asian Countries with the Most Christians | 0 | - | 4.85 | 97,353 |
| Top 10 Richest Countries in Asia | 0 | - | 4.74 | 105,778 |
| 15 Largest Cities in the Middle East With a Map | 0 | - | 4.92 | 118,599 |
| Countries Bordering Iran | 0 | - | 4.83 | 95,412 |
| Countries that Border Iraq | 0 | - | 4.97 | 108,494 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,719 |
| Prime Ministers of Israel | 0 | - | 3.97 | 17,962 |
| Hindu Countries | 0 | - | 4.86 | 50,235 |
| Biggest Trading Partners – Australia | 0 | - | 4.93 | 61,652 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,548 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.37 | 48,530 |
| The Trojan War | 0 | - | 4.83 | 39,770 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 648,243 |
| Name that Greek Letter | 0 | - | 4.93 | 324,019 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,040 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,602 |
| Roman Emperors | 0 | - | 4.95 | 120,242 |
| Egypt Country Quiz | 0 | - | 4.83 | 77,604 |
| Countries Bordering China Since 1914 | 0 | - | 4.93 | 95,331 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 89,400 |
| Countries with the Most Hindus | 0 | - | 4.90 | 123,134 |
| Colonies of Africa with a Map | 0 | - | 4.78 | 54,507 |
| Biggest Trading Partners - Colombia | 0 | - | 4.88 | 40,376 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 108,831 |
| U.S. Presidents by Event | 0 | - | 4.58 | 34,617 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 93,902 |
| Presidential Middle Names | 0 | - | 4.41 | 60,350 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,407 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,639 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 35,028 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,460 |
| The American Revolution | 0 | - | 4.52 | 54,268 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 530,097 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 161,644 |
| History of Russia Quiz | 0 | - | 4.47 | 31,941 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,992 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 71,583 |
| Olympian Gods Quiz | 0 | - | 4.96 | 501,440 |
| Ancient Greek Words | 0 | - | 4.93 | 111,776 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 126,270 |
| History of Italy | 0 | - | 4.55 | 32,027 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,481 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,701 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,273 |
| Countries Closest to Spain A-Z | 0 | - | 4.98 | 108,343 |
| Biggest Trading Partners - Spain | 0 | - | 4.92 | 53,822 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,914 |
| Biggest Trading Partners – United Kingdom | 0 | - | 4.93 | 80,459 |
| Countries Closest to the United Kingdom A-Z | 0 | - | 4.96 | 190,993 |
| All UK Parliament Constituencies on a Map | 0 | - | 4.60 | 28,864 |
| Countries of Asia in 1900 | 0 | - | 4.50 | 58,054 |
| Turkmenistan Country Quiz | 0 | - | 4.81 | 26,007 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 82,854 |
| Countries that Beat Egypt | 0 | - | 4.88 | 57,078 |
| Countries Closest to Israel | 0 | - | 4.69 | 106,233 |
| Flags of Countries that Border China | 0 | - | 4.94 | 99,621 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 268,440 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 305,178 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 70,111 |
| Category Elimination - U.S. States #1 | 0 | - | 4.88 | 221,061 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 134,415 |
| Midwestern States of the U.S. | 0 | - | 4.88 | 13,864 |
| Europe Map Quiz | 0 | - | 5.00 | 4,767,413 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 35,020 |
| Save Europeans by Guessing Countries | 0 | - | 4.86 | 214,129 |
| Countries of Europe After World War II | 0 | - | 4.99 | 188,586 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 156,725 |
| Countries of the Soviet Union | 0 | - | 4.98 | 194,713 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 437,590 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,687 |
| Pope Facts | 0 | - | 4.39 | 31,272 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 279,431 |
| Random Asian Countries on a Map | 0 | - | 4.91 | 170,223 |
| The Vietnam War | 0 | - | 4.44 | 35,558 |
| Communist Countries in History | 0 | - | 4.63 | 496,171 |
| History of India | 0 | - | 4.62 | 21,445 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.69 | 55,487 |
| Africa Map Quiz | 0 | - | 5.00 | 2,120,065 |
| African Countries with the Most Muslims | 0 | - | 4.80 | 100,963 |
| History of South Africa | 0 | - | 4.60 | 17,707 |
| Oceania Map Quiz | 0 | - | 4.98 | 643,254 |
| Australian Capitals | 0 | - | 4.92 | 62,735 |
| History of Mexico | 0 | - | 4.58 | 15,323 |
| United States Map Quiz | 0 | - | 4.98 | 4,161,613 |
| American Political Words | 0 | - | 4.39 | 23,435 |
| U.S. Political Figures by Picture #1 | 0 | - | 4.14 | 26,173 |
| U.S. Political Figures by Picture #2 | 0 | - | 4.10 | 15,533 |
| Female Political Figures by Picture - U.S. | 0 | - | 4.20 | 10,870 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,385 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,270 |
| First Ladies of the United States | 0 | - | 4.28 | 85,697 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,968 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,236 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 77,193 |
| U.S. President Scramble | 0 | - | 4.40 | 116,857 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,225 |
| Add a Letter - Make a U.S. President | 0 | - | 4.57 | 23,985 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,203 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,926 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,846 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,244 |
| Official European Union Languages | 0 | - | 4.97 | 238,728 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,004 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 428,638 |
| Least Forested Countries in Asia | 0 | - | 4.75 | 64,752 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 94,102 |
| Soviet Union Country Quiz | 0 | - | 4.91 | 80,816 |
| History of Austria | 0 | - | 4.70 | 17,882 |
| Geography of the French Empire | 0 | - | 4.45 | 27,138 |
| The French Revolution | 0 | - | 4.47 | 24,032 |
| History of France | 0 | - | 4.59 | 57,166 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,345 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,040 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,937 |
| Mythology A-Z | 0 | - | 4.31 | 37,257 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 20,814 |
| Figures from Greek Mythology | 0 | - | 4.91 | 187,280 |
| Countries in the Byzantine Empire | 0 | - | 4.95 | 72,226 |
| Count in Roman Numerals - 30 Second Sprint | 0 | - | 4.27 | 103,101 |
| History of The Netherlands | 0 | - | 4.46 | 17,458 |
| The Vikings! | 0 | - | 4.46 | 28,357 |
| The Portuguese Empire | 0 | - | 4.58 | 12,076 |
| Arthurian Legend | 0 | - | 4.33 | 25,127 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,379 |
| Countries the UK Declared War On | 0 | - | 4.55 | 122,589 |
| Geography of the British Empire | 0 | - | 4.48 | 39,720 |
| Medieval English History | 0 | - | 4.53 | 43,554 |
| Places Where Winston Churchill Said We Would Fight the Nazis | 0 | - | 4.57 | 14,618 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,449,056 |
| Asia Map Quiz | 0 | - | 4.99 | 918,095 |
| Most Guessed Asian Capitals | 0 | - | 4.51 | 65,928 |
| Top 10 Most Forested Countries in Asia | 0 | - | 4.63 | 63,494 |
| Random Sequential Asian Countries on a Map | 0 | - | 4.99 | 119,166 |
| Flags of the Middle East | 0 | - | 4.69 | 62,665 |
| History of Iran | 0 | - | 4.66 | 16,367 |
| Iran Country Quiz | 0 | - | 4.49 | 60,417 |
| Iraq Country Quiz | 0 | - | 4.43 | 40,980 |
| The Iraq War | 0 | - | 4.47 | 15,664 |
| Biggest Cities in Turkey on a Map | 0 | - | 4.25 | 20,547 |
| English Words of Arabic Origin | 0 | - | 4.54 | 49,776 |
| Vietnam War Countries | 0 | - | 4.82 | 94,302 |
| Chinese Inventions | 0 | - | 4.30 | 33,811 |
| History of China | 0 | - | 4.37 | 57,259 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,374 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,799 |
| Countries by Founding Story | 0 | - | 4.95 | 77,310 |
| Independence from Whom | 0 | - | 4.99 | 211,940 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 132,627 |
