| Prime Ministers of the UK | 0 | - | 4.96 | 435,609 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,744 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,180 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.85 | 114,870 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,665,055 |
| Biggest Trading Partners - Turkey | 0 | - | 4.80 | 50,287 |
| Paramount Leaders of China | 0 | - | 4.36 | 11,016 |
| Country by Photo of its Leader | 0 | - | 4.74 | 123,460 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 69,367 |
| The Dictator Files: Chairman Mao | 0 | - | 4.28 | 20,596 |
| Soviet Leaders 1917–1991 | 0 | - | 4.43 | 94,574 |
| Byzantine History | 0 | - | 4.91 | 28,666 |
| Biggest Trading Partners - China | 0 | - | 4.95 | 74,773 |
| National Founders | 0 | - | 4.40 | 83,691 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 424,363 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 379,999 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,644 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,730 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,563 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 190,306 |
| Play-Doh Presidents | 0 | - | 5.00 | 81,807 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,245 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,670 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,704 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,334 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,215 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,680 |
| "Stan" Countries - Map Quiz | 0 | - | 4.98 | 134,231 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 103,947 |
| Political Movements by Country | 0 | - | 4.46 | 72,335 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,122 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 80,830 |
| African Countries with the Most Christians | 0 | - | 4.94 | 75,008 |
| Top 10 Richest Countries in Africa | 0 | - | 4.85 | 75,302 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 119,542 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,794 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 28,916 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,603 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.49 | 11,683 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,530 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,223 |
| Top 10 Richest Countries in Europe | 0 | - | 4.90 | 148,420 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 197,626 |
| Biggest Trading Partners - European Union | 0 | - | 4.91 | 72,256 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 89,216 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,067 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,586 |
| Name the English Monarchs | 0 | - | 4.92 | 499,068 |
| Name the Popes Quiz | 0 | - | 4.47 | 137,377 |
| Countries of the Popes | 0 | - | 4.79 | 127,427 |
| Every Asian Country Shape | 0 | - | 4.95 | 86,856 |
| Asian Countries with the Most Christians | 0 | - | 4.85 | 96,491 |
| Top 10 Richest Countries in Asia | 0 | - | 4.73 | 105,030 |
| 15 Largest Cities in the Middle East With a Map | 0 | - | 4.92 | 117,588 |
| Countries Bordering Iran | 0 | - | 4.83 | 94,902 |
| Countries that Border Iraq | 0 | - | 4.97 | 107,968 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,371 |
| Prime Ministers of Israel | 0 | - | 3.97 | 17,843 |
| Hindu Countries | 0 | - | 4.86 | 49,698 |
| Biggest Trading Partners – Australia | 0 | - | 4.93 | 61,081 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,394 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.37 | 48,344 |
| The Trojan War | 0 | - | 4.83 | 39,501 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 643,365 |
| Name that Greek Letter | 0 | - | 4.94 | 322,118 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,883 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,172 |
| Roman Emperors | 0 | - | 4.95 | 118,814 |
| Egypt Country Quiz | 0 | - | 4.82 | 77,151 |
| Countries Bordering China Since 1914 | 0 | - | 4.93 | 94,842 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 88,635 |
| Countries with the Most Hindus | 0 | - | 4.90 | 122,515 |
| Colonies of Africa with a Map | 0 | - | 4.78 | 54,082 |
| Biggest Trading Partners - Colombia | 0 | - | 4.88 | 40,053 |
| U.S. Vice Presidents | 0 | - | 4.41 | 135,343 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 108,117 |
| U.S. Presidents by Event | 0 | - | 4.58 | 33,722 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 93,172 |
| Presidential Middle Names | 0 | - | 4.41 | 59,815 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 52,860 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 93,977 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,798 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,226 |
| The American Revolution | 0 | - | 4.52 | 54,110 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 526,970 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 160,689 |
| History of Russia Quiz | 0 | - | 4.49 | 31,819 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,774 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 70,936 |
| Olympian Gods Quiz | 0 | - | 4.96 | 497,463 |
| Ancient Greek Words | 0 | - | 4.92 | 110,919 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 124,729 |
| History of Italy | 0 | - | 4.55 | 31,864 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,347 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,524 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,037 |
| Countries Closest to Spain A-Z | 0 | - | 4.99 | 107,824 |
| Biggest Trading Partners - Spain | 0 | - | 4.92 | 53,571 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,648 |
| Biggest Trading Partners – United Kingdom | 0 | - | 4.92 | 79,701 |
| Countries Closest to the United Kingdom A-Z | 0 | - | 4.96 | 190,162 |
| All UK Parliament Constituencies on a Map | 0 | - | 4.60 | 28,598 |
| Countries of Asia in 1900 | 0 | - | 4.50 | 57,694 |
| Turkmenistan Country Quiz | 0 | - | 4.81 | 25,792 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 82,028 |
| Countries that Beat Egypt | 0 | - | 4.88 | 56,687 |
| Countries Closest to Israel | 0 | - | 4.67 | 105,338 |
| Flags of Countries that Border China | 0 | - | 4.94 | 98,697 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 266,851 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 303,798 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 69,555 |
| Category Elimination - U.S. States #1 | 0 | - | 4.88 | 219,029 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 132,894 |
| Europe Map Quiz | 0 | - | 5.00 | 4,739,059 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,808 |
| Save Europeans by Guessing Countries | 0 | - | 4.84 | 210,322 |
| Countries of Europe After World War II | 0 | - | 4.99 | 187,022 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 155,618 |
| Countries of the Soviet Union | 0 | - | 4.98 | 194,054 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 434,455 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,426 |
| Pope Facts | 0 | - | 4.39 | 31,092 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 277,806 |
| Random Asian Countries on a Map | 0 | - | 4.90 | 169,082 |
| The Vietnam War | 0 | - | 4.43 | 35,348 |
| Communist Countries in History | 0 | - | 4.63 | 493,262 |
| History of India | 0 | - | 4.61 | 21,318 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.69 | 55,238 |
| Africa Map Quiz | 0 | - | 5.00 | 2,107,474 |
| African Countries with the Most Muslims | 0 | - | 4.80 | 100,550 |
| History of South Africa | 0 | - | 4.60 | 17,625 |
| Oceania Map Quiz | 0 | - | 4.98 | 636,969 |
| Australian Capitals | 0 | - | 4.92 | 62,614 |
| History of Mexico | 0 | - | 4.58 | 15,245 |
| United States Map Quiz | 0 | - | 4.98 | 4,145,323 |
| American Political Words | 0 | - | 4.39 | 23,356 |
| U.S. Political Figures by Picture #1 | 0 | - | 4.14 | 26,090 |
| U.S. Political Figures by Picture #2 | 0 | - | 4.10 | 15,472 |
| Female Political Figures by Picture - U.S. | 0 | - | 4.20 | 10,824 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,181 |
| First Ladies of the United States | 0 | - | 4.28 | 85,318 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,840 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,134 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 76,515 |
| U.S. President Scramble | 0 | - | 4.40 | 116,340 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,040 |
| Add a Letter - Make a U.S. President | 0 | - | 4.61 | 23,854 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,060 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,739 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,715 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 68,736 |
| Official European Union Languages | 0 | - | 4.97 | 237,295 |
| European Countries in their Native Language | 0 | - | 4.99 | 157,109 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 425,902 |
| Least Forested Countries in Asia | 0 | - | 4.74 | 64,494 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 93,669 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,355 |
| History of Austria | 0 | - | 4.70 | 17,779 |
| Geography of the French Empire | 0 | - | 4.45 | 26,964 |
| The French Revolution | 0 | - | 4.46 | 23,832 |
| History of France | 0 | - | 4.59 | 56,384 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,409 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,021 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,826 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,806 |
| Mythology A-Z | 0 | - | 4.31 | 37,058 |
| Figures from Greek Mythology | 0 | - | 4.91 | 185,452 |
| Countries in the Byzantine Empire | 0 | - | 4.95 | 71,816 |
| Count in Roman Numerals - 30 Second Sprint | 0 | - | 4.26 | 101,779 |
| History of The Netherlands | 0 | - | 4.46 | 17,344 |
| The Vikings! | 0 | - | 4.46 | 28,268 |
| The Portuguese Empire | 0 | - | 4.54 | 12,008 |
| Arthurian Legend | 0 | - | 4.33 | 25,064 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,238 |
| Countries the UK Declared War On | 0 | - | 4.61 | 121,975 |
| Geography of the British Empire | 0 | - | 4.48 | 39,537 |
| Medieval English History | 0 | - | 4.53 | 43,352 |
| Places Where Winston Churchill Said We Would Fight the Nazis | 0 | - | 4.57 | 14,565 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,442,566 |
| Asia Map Quiz | 0 | - | 4.99 | 908,901 |
| Most Guessed Asian Capitals | 0 | - | 4.51 | 65,814 |
| Top 10 Most Forested Countries in Asia | 0 | - | 4.63 | 63,241 |
| Random Sequential Asian Countries on a Map | 0 | - | 4.99 | 118,455 |
| Flags of the Middle East | 0 | - | 4.69 | 62,418 |
| History of Iran | 0 | - | 4.65 | 16,288 |
| Iran Country Quiz | 0 | - | 4.53 | 60,016 |
| Iraq Country Quiz | 0 | - | 4.43 | 40,751 |
| The Iraq War | 0 | - | 4.47 | 15,576 |
| Biggest Cities in Turkey on a Map | 0 | - | 4.25 | 20,292 |
| Ottoman Empire Quiz | 0 | - | 4.42 | 17,056 |
| English Words of Arabic Origin | 0 | - | 4.54 | 49,640 |
| Vietnam War Countries | 0 | - | 4.83 | 93,766 |
| Chinese Inventions | 0 | - | 4.30 | 33,739 |
| History of China | 0 | - | 4.37 | 56,791 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,308 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,307 |
| Countries by Founding Story | 0 | - | 4.95 | 76,701 |
| Independence from Whom | 0 | - | 4.99 | 210,109 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,033 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,112 |
