| Prime Ministers of the UK | 0 | - | 4.96 | 435,628 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,748 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,183 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.85 | 115,132 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,665,265 |
| Biggest Trading Partners - Turkey | 0 | - | 4.80 | 50,291 |
| Paramount Leaders of China | 0 | - | 4.36 | 11,017 |
| Country by Photo of its Leader | 0 | - | 4.74 | 123,469 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 69,372 |
| The Dictator Files: Chairman Mao | 0 | - | 4.28 | 20,596 |
| Soviet Leaders 1917–1991 | 0 | - | 4.43 | 94,575 |
| Byzantine History | 0 | - | 4.91 | 28,667 |
| Biggest Trading Partners - China | 0 | - | 4.95 | 74,775 |
| National Founders | 0 | - | 4.40 | 83,691 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 424,386 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 380,011 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,649 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,732 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,569 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 190,321 |
| Play-Doh Presidents | 0 | - | 5.00 | 81,811 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,249 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,672 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,708 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,336 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,218 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,681 |
| "Stan" Countries - Map Quiz | 0 | - | 4.98 | 134,241 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 103,949 |
| Political Movements by Country | 0 | - | 4.46 | 72,337 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,123 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 80,831 |
| African Countries with the Most Christians | 0 | - | 4.94 | 75,011 |
| Top 10 Richest Countries in Africa | 0 | - | 4.85 | 75,310 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 119,547 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,795 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 28,916 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,604 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.49 | 11,683 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,538 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,228 |
| Top 10 Richest Countries in Europe | 0 | - | 4.90 | 148,433 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 197,632 |
| Biggest Trading Partners - European Union | 0 | - | 4.91 | 72,258 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 89,220 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,068 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,590 |
| Name the English Monarchs | 0 | - | 4.92 | 499,107 |
| Name the Popes Quiz | 0 | - | 4.47 | 137,383 |
| Countries of the Popes | 0 | - | 4.79 | 127,430 |
| Every Asian Country Shape | 0 | - | 4.95 | 86,859 |
| Asian Countries with the Most Christians | 0 | - | 4.85 | 96,496 |
| Top 10 Richest Countries in Asia | 0 | - | 4.73 | 105,040 |
| 15 Largest Cities in the Middle East With a Map | 0 | - | 4.92 | 117,594 |
| Countries Bordering Iran | 0 | - | 4.83 | 94,905 |
| Countries that Border Iraq | 0 | - | 4.97 | 107,971 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,372 |
| Prime Ministers of Israel | 0 | - | 3.97 | 17,843 |
| Hindu Countries | 0 | - | 4.86 | 49,701 |
| Biggest Trading Partners – Australia | 0 | - | 4.93 | 61,082 |
| 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 | 643,389 |
| Name that Greek Letter | 0 | - | 4.94 | 322,125 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,888 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,174 |
| Roman Emperors | 0 | - | 4.95 | 118,824 |
| Egypt Country Quiz | 0 | - | 4.82 | 77,152 |
| Countries Bordering China Since 1914 | 0 | - | 4.93 | 94,844 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 88,641 |
| Countries with the Most Hindus | 0 | - | 4.90 | 122,518 |
| Colonies of Africa with a Map | 0 | - | 4.78 | 54,084 |
| Biggest Trading Partners - Colombia | 0 | - | 4.88 | 40,053 |
| U.S. Vice Presidents | 0 | - | 4.41 | 135,351 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 108,125 |
| U.S. Presidents by Event | 0 | - | 4.58 | 33,729 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 93,178 |
| Presidential Middle Names | 0 | - | 4.41 | 59,822 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 52,865 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 93,982 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,801 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,226 |
| The American Revolution | 0 | - | 4.52 | 54,112 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 526,974 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 160,694 |
| 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 | 70,940 |
| Olympian Gods Quiz | 0 | - | 4.96 | 497,475 |
| Ancient Greek Words | 0 | - | 4.92 | 110,927 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 124,741 |
| 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 | 77,038 |
| Countries Closest to Spain A-Z | 0 | - | 4.99 | 107,828 |
| Biggest Trading Partners - Spain | 0 | - | 4.92 | 53,573 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,650 |
| Biggest Trading Partners – United Kingdom | 0 | - | 4.92 | 79,707 |
| Countries Closest to the United Kingdom A-Z | 0 | - | 4.96 | 190,167 |
| 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 | 25,797 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 82,034 |
| Countries that Beat Egypt | 0 | - | 4.88 | 56,689 |
| Countries Closest to Israel | 0 | - | 4.67 | 105,339 |
| Flags of Countries that Border China | 0 | - | 4.94 | 98,698 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 266,858 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 303,820 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 69,561 |
| Category Elimination - U.S. States #1 | 0 | - | 4.88 | 219,047 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 132,908 |
| Europe Map Quiz | 0 | - | 5.00 | 4,739,207 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,809 |
| Save Europeans by Guessing Countries | 0 | - | 4.84 | 210,338 |
| Countries of Europe After World War II | 0 | - | 4.99 | 187,026 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 155,621 |
| Countries of the Soviet Union | 0 | - | 4.98 | 194,058 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 434,473 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,426 |
| Pope Facts | 0 | - | 4.39 | 31,096 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 277,812 |
| Random Asian Countries on a Map | 0 | - | 4.90 | 169,083 |
| The Vietnam War | 0 | - | 4.43 | 35,349 |
| Communist Countries in History | 0 | - | 4.63 | 493,280 |
| History of India | 0 | - | 4.61 | 21,318 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.69 | 55,239 |
| Africa Map Quiz | 0 | - | 5.00 | 2,107,540 |
| African Countries with the Most Muslims | 0 | - | 4.80 | 100,552 |
| History of South Africa | 0 | - | 4.60 | 17,625 |
| Oceania Map Quiz | 0 | - | 4.98 | 636,995 |
| Australian Capitals | 0 | - | 4.92 | 62,614 |
| History of Mexico | 0 | - | 4.58 | 15,245 |
| United States Map Quiz | 0 | - | 4.98 | 4,145,402 |
| American Political Words | 0 | - | 4.39 | 23,358 |
| 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 | 20,183 |
| First Ladies of the United States | 0 | - | 4.28 | 85,319 |
| 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 | 76,519 |
| U.S. President Scramble | 0 | - | 4.40 | 116,341 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,042 |
| 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 | 47,740 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,716 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 68,738 |
| Official European Union Languages | 0 | - | 4.97 | 237,298 |
| European Countries in their Native Language | 0 | - | 4.99 | 157,117 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 425,907 |
| Least Forested Countries in Asia | 0 | - | 4.74 | 64,494 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 93,676 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,358 |
| History of Austria | 0 | - | 4.70 | 17,779 |
| Geography of the French Empire | 0 | - | 4.45 | 26,966 |
| The French Revolution | 0 | - | 4.46 | 23,832 |
| History of France | 0 | - | 4.59 | 56,388 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,409 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,023 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,828 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,807 |
| Mythology A-Z | 0 | - | 4.31 | 37,059 |
| Figures from Greek Mythology | 0 | - | 4.91 | 185,455 |
| Countries in the Byzantine Empire | 0 | - | 4.95 | 71,823 |
| Count in Roman Numerals - 30 Second Sprint | 0 | - | 4.26 | 101,786 |
| History of The Netherlands | 0 | - | 4.46 | 17,345 |
| The Vikings! | 0 | - | 4.46 | 28,268 |
| The Portuguese Empire | 0 | - | 4.54 | 12,008 |
| Arthurian Legend | 0 | - | 4.33 | 25,065 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,238 |
| Countries the UK Declared War On | 0 | - | 4.61 | 121,976 |
| Geography of the British Empire | 0 | - | 4.48 | 39,538 |
| Medieval English History | 0 | - | 4.53 | 43,353 |
| Places Where Winston Churchill Said We Would Fight the Nazis | 0 | - | 4.57 | 14,565 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,442,587 |
| Asia Map Quiz | 0 | - | 4.99 | 908,921 |
| 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 | 118,456 |
| Flags of the Middle East | 0 | - | 4.69 | 62,419 |
| History of Iran | 0 | - | 4.65 | 16,288 |
| Iran Country Quiz | 0 | - | 4.53 | 60,017 |
| 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 | 20,294 |
| Ottoman Empire Quiz | 0 | - | 4.42 | 17,059 |
| English Words of Arabic Origin | 0 | - | 4.54 | 49,640 |
| Vietnam War Countries | 0 | - | 4.83 | 93,770 |
| Chinese Inventions | 0 | - | 4.30 | 33,739 |
| History of China | 0 | - | 4.37 | 56,794 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,314 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,309 |
| Countries by Founding Story | 0 | - | 4.95 | 76,703 |
| Independence from Whom | 0 | - | 4.99 | 210,118 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,039 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,115 |
