| Prime Ministers of the UK | 0 | - | 4.96 | 434,792 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,689 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,059 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.85 | 113,273 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,656,057 |
| Paramount Leaders of China | 0 | - | 4.36 | 11,004 |
| Country by Photo of its Leader | 0 | - | 4.74 | 123,287 |
| Hindu Countries | 0 | - | 4.86 | 49,599 |
| The Dictator Files: Chairman Mao | 0 | - | 4.28 | 20,579 |
| Soviet Leaders 1917–1991 | 0 | - | 4.43 | 94,456 |
| Biggest Trading Partners - China | 0 | - | 4.95 | 74,694 |
| National Founders | 0 | - | 4.40 | 83,656 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 423,874 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 379,633 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,638 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,368 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 189,913 |
| Play-Doh Presidents | 0 | - | 5.00 | 81,690 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 148,989 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,456 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,455 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,148 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,042 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,650 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,541 |
| "Stan" Countries - Map Quiz | 0 | - | 4.98 | 133,834 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 103,869 |
| Political Movements by Country | 0 | - | 4.46 | 72,269 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 105,940 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 80,711 |
| Countries Bordering India | 0 | - | 4.98 | 162,623 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.68 | 55,183 |
| Countries Closest to India | 0 | - | 4.97 | 102,222 |
| African Countries with the Most Christians | 0 | - | 4.94 | 74,879 |
| Top 10 Richest Countries in Africa | 0 | - | 4.85 | 75,190 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 119,384 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,750 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 28,885 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,539 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.49 | 11,670 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,311 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,160 |
| Top 10 Richest Countries in Europe | 0 | - | 4.91 | 148,184 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 197,294 |
| Biggest Trading Partners - European Union | 0 | - | 4.91 | 72,126 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 89,000 |
| Countries Italy Declared War On | 0 | - | 4.75 | 42,975 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 85,540 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,339 |
| Name the English Monarchs | 0 | - | 4.92 | 498,103 |
| Name the Popes Quiz | 0 | - | 4.47 | 137,189 |
| Countries of the Popes | 0 | - | 4.79 | 127,248 |
| Every Asian Country Shape | 0 | - | 4.95 | 86,736 |
| Asian Countries with the Most Christians | 0 | - | 4.85 | 96,308 |
| Top 10 Richest Countries in Asia | 0 | - | 4.73 | 104,816 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,295 |
| Prime Ministers of Israel | 0 | - | 3.97 | 17,822 |
| Modern Day Countries of the Mughal Empire on a Map | 0 | - | 4.42 | 33,234 |
| Biggest Trading Partners – Australia | 0 | - | 4.93 | 60,972 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,377 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.37 | 48,299 |
| The Trojan War | 0 | - | 4.83 | 39,445 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 642,093 |
| Name that Greek Letter | 0 | - | 4.94 | 321,732 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,593 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,065 |
| Roman Emperors | 0 | - | 4.95 | 118,525 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 69,238 |
| Biggest Trading Partners - Turkey | 0 | - | 4.80 | 50,193 |
| Countries Bordering China Since 1914 | 0 | - | 4.93 | 94,753 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 88,476 |
| Countries with the Most Hindus | 0 | - | 4.90 | 122,379 |
| Colonies of Africa with a Map | 0 | - | 4.77 | 53,964 |
| Biggest Trading Partners - Colombia | 0 | - | 4.88 | 39,982 |
| U.S. Vice Presidents | 0 | - | 4.41 | 134,974 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 107,981 |
| U.S. Presidents by Event | 0 | - | 4.58 | 33,537 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 93,025 |
| Presidential Middle Names | 0 | - | 4.41 | 59,724 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 52,757 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 93,841 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,753 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,177 |
| The American Revolution | 0 | - | 4.52 | 54,062 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 526,464 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 160,506 |
| History of Russia Quiz | 0 | - | 4.49 | 31,797 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,703 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 70,804 |
| Olympian Gods Quiz | 0 | - | 4.96 | 496,424 |
| Ancient Greek Words | 0 | - | 4.92 | 110,727 |
| 101 Figures from Greek Mythology | 0 | - | 5.00 | 124,354 |
| History of Italy | 0 | - | 4.55 | 31,824 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,322 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,489 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 76,989 |
| Countries Closest to Spain A-Z | 0 | - | 4.99 | 107,698 |
| Biggest Trading Partners - Spain | 0 | - | 4.91 | 53,512 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,471 |
| Biggest Trading Partners – United Kingdom | 0 | - | 4.92 | 79,535 |
| Countries Closest to the United Kingdom A-Z | 0 | - | 4.96 | 189,951 |
| All UK Parliament Constituencies on a Map | 0 | - | 4.60 | 28,549 |
| Countries of Asia in 1900 | 0 | - | 4.50 | 57,640 |
| Turkmenistan Country Quiz | 0 | - | 4.81 | 25,713 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 81,843 |
| Flags of Countries that Border China | 0 | - | 4.94 | 98,565 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 266,579 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 303,419 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 69,447 |
| Category Elimination - U.S. States #1 | 0 | - | 4.87 | 218,610 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 132,556 |
| Europe Map Quiz | 0 | - | 5.00 | 4,732,402 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,752 |
| Save Europeans by Guessing Countries | 0 | - | 4.84 | 209,643 |
| Countries of Europe After World War II | 0 | - | 4.99 | 186,787 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 155,398 |
| Countries of the Soviet Union | 0 | - | 4.98 | 193,869 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 72,508 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 433,664 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,400 |
| Pope Facts | 0 | - | 4.39 | 31,051 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 277,149 |
| Random Asian Countries on a Map | 0 | - | 4.90 | 168,825 |
| The Vietnam War | 0 | - | 4.43 | 35,302 |
| Communist Countries in History | 0 | - | 4.63 | 492,615 |
| History of India | 0 | - | 4.61 | 21,290 |
| Countries that Visit India the Most | 0 | - | 4.74 | 60,202 |
| Africa Map Quiz | 0 | - | 5.00 | 2,104,783 |
| African Countries with the Most Muslims | 0 | - | 4.80 | 100,437 |
| History of South Africa | 0 | - | 4.60 | 17,604 |
| Oceania Map Quiz | 0 | - | 4.98 | 635,526 |
| Australian Capitals | 0 | - | 4.92 | 62,594 |
| History of Mexico | 0 | - | 4.58 | 15,232 |
| United States Map Quiz | 0 | - | 4.98 | 4,142,316 |
| American Political Words | 0 | - | 4.39 | 23,341 |
| U.S. Political Figures by Picture #1 | 0 | - | 4.14 | 26,075 |
| U.S. Political Figures by Picture #2 | 0 | - | 4.10 | 15,465 |
| Female Political Figures by Picture - U.S. | 0 | - | 4.20 | 10,812 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,168 |
| First Ladies of the United States | 0 | - | 4.28 | 85,253 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,818 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,116 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 76,334 |
| U.S. President Scramble | 0 | - | 4.40 | 116,223 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,005 |
| Add a Letter - Make a U.S. President | 0 | - | 4.61 | 23,840 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,031 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,702 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,693 |
| Count to 10 in Europe: Pro | 0 | - | 4.85 | 68,597 |
| Official European Union Languages | 0 | - | 4.97 | 236,847 |
| European Countries in their Native Language | 0 | - | 4.99 | 156,721 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 425,324 |
| Least Forested Countries in Asia | 0 | - | 4.74 | 64,432 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 93,562 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,255 |
| History of Austria | 0 | - | 4.70 | 17,758 |
| Geography of the French Empire | 0 | - | 4.48 | 26,941 |
| The French Revolution | 0 | - | 4.46 | 23,789 |
| History of France | 0 | - | 4.59 | 56,100 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,388 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 26,940 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,781 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,774 |
| Mythology A-Z | 0 | - | 4.31 | 37,011 |
| Figures from Greek Mythology | 0 | - | 4.91 | 185,024 |
| Countries in the Byzantine Empire | 0 | - | 4.95 | 71,744 |
| Byzantine History | 0 | - | 4.91 | 28,627 |
| Count in Roman Numerals - 30 Second Sprint | 0 | - | 4.26 | 101,523 |
| History of The Netherlands | 0 | - | 4.46 | 17,318 |
| The Vikings! | 0 | - | 4.46 | 28,248 |
| The Portuguese Empire | 0 | - | 4.54 | 11,995 |
| Arthurian Legend | 0 | - | 4.33 | 25,050 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,190 |
| Countries the UK Declared War On | 0 | - | 4.61 | 121,819 |
| Geography of the British Empire | 0 | - | 4.48 | 39,483 |
| Medieval English History | 0 | - | 4.53 | 43,326 |
| Places Where Winston Churchill Said We Would Fight the Nazis | 0 | - | 4.57 | 14,548 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,440,941 |
| Asia Map Quiz | 0 | - | 4.99 | 907,341 |
| Most Guessed Asian Capitals | 0 | - | 4.51 | 65,785 |
| Top 10 Most Forested Countries in Asia | 0 | - | 4.63 | 63,190 |
| Random Sequential Asian Countries on a Map | 0 | - | 4.99 | 118,299 |
| History of Iran | 0 | - | 4.65 | 16,273 |
| The Iraq War | 0 | - | 4.47 | 15,559 |
| Ottoman Empire Quiz | 0 | - | 4.42 | 17,028 |
| Vietnam War Countries | 0 | - | 4.83 | 93,634 |
| Chinese Inventions | 0 | - | 4.30 | 33,725 |
| History of China | 0 | - | 4.37 | 56,705 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,060 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,189 |
| Countries by Founding Story | 0 | - | 4.95 | 76,564 |
| Independence from Whom | 0 | - | 4.99 | 209,747 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 130,795 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,018 |
| Countries that Beat India | 0 | - | 4.41 | 62,595 |
| Biggest Cities in India | 0 | - | 4.70 | 67,343 |
| Countries of Africa | 0 | - | 5.00 | 2,508,800 |
| Africa Cities Map Quiz | 0 | - | 4.97 | 98,444 |
| Flags of Africa Quiz | 0 | - | 5.00 | 463,650 |
