| Prime Ministers of the UK | 0 | - | 4.96 | 436,384 |
| Hindu Countries | 0 | - | 4.86 | 49,799 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,775 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,253 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.85 | 118,971 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,672,194 |
| Paramount Leaders of China | 0 | - | 4.36 | 11,023 |
| Country by Photo of its Leader | 0 | - | 4.74 | 123,581 |
| The Dictator Files: Chairman Mao | 0 | - | 4.28 | 20,612 |
| Countries with the Most Hindus | 0 | - | 4.90 | 122,600 |
| Soviet Leaders 1917–1991 | 0 | - | 4.43 | 94,645 |
| Biggest Trading Partners - Turkey | 0 | - | 4.81 | 50,351 |
| Biggest Trading Partners - China | 0 | - | 4.95 | 74,832 |
| National Founders | 0 | - | 4.40 | 83,727 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 424,877 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 380,285 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,724 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,814 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,765 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 190,615 |
| Play-Doh Presidents | 0 | - | 5.00 | 81,912 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,477 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,805 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,907 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,447 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,323 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,706 |
| "Stan" Countries - Map Quiz | 0 | - | 4.98 | 134,562 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 104,024 |
| Political Movements by Country | 0 | - | 4.46 | 72,372 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,266 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 80,938 |
| Countries Bordering India | 0 | - | 4.98 | 163,171 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.69 | 55,290 |
| Countries Closest to India | 0 | - | 4.97 | 102,441 |
| African Countries with the Most Christians | 0 | - | 4.94 | 75,134 |
| Top 10 Richest Countries in Africa | 0 | - | 4.85 | 75,484 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 119,722 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,840 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 28,959 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,664 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.49 | 11,695 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,697 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,282 |
| Top 10 Richest Countries in Europe | 0 | - | 4.90 | 148,706 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 197,987 |
| Biggest Trading Partners - European Union | 0 | - | 4.91 | 72,377 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 89,418 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,124 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,777 |
| Name the English Monarchs | 0 | - | 4.92 | 499,866 |
| Name the Popes Quiz | 0 | - | 4.47 | 137,526 |
| Countries of the Popes | 0 | - | 4.79 | 127,553 |
| Every Asian Country Shape | 0 | - | 4.95 | 86,968 |
| Asian Countries with the Most Christians | 0 | - | 4.85 | 96,643 |
| Top 10 Richest Countries in Asia | 0 | - | 4.73 | 105,179 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,421 |
| Prime Ministers of Israel | 0 | - | 3.97 | 17,867 |
| Biggest Cities in India | 0 | - | 4.70 | 67,487 |
| Modern Day Countries of the Mughal Empire on a Map | 0 | - | 4.42 | 33,394 |
| Biggest Trading Partners – Australia | 0 | - | 4.93 | 61,192 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,418 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.37 | 48,381 |
| The Trojan War | 0 | - | 4.83 | 39,547 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 644,282 |
| Name that Greek Letter | 0 | - | 4.93 | 322,439 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,098 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,255 |
| Roman Emperors | 0 | - | 4.95 | 119,146 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 69,470 |
| Countries Bordering China Since 1914 | 0 | - | 4.93 | 94,925 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 88,789 |
| All Cities in India with Population of 1 Million | 0 | - | 4.83 | 47,290 |
| Colonies of Africa with a Map | 0 | - | 4.78 | 54,167 |
| Biggest Trading Partners - Colombia | 0 | - | 4.88 | 40,114 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 108,231 |
| U.S. Presidents by Event | 0 | - | 4.58 | 33,889 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 93,298 |
| Presidential Middle Names | 0 | - | 4.41 | 59,906 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 52,958 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,173 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,843 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,267 |
| The American Revolution | 0 | - | 4.52 | 54,136 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 527,555 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 160,874 |
| History of Russia Quiz | 0 | - | 4.49 | 31,835 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,815 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 71,050 |
| Olympian Gods Quiz | 0 | - | 4.96 | 498,137 |
| Ancient Greek Words | 0 | - | 4.93 | 111,054 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 124,989 |
| History of Italy | 0 | - | 4.55 | 31,891 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,372 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,552 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,080 |
| Countries Closest to Spain A-Z | 0 | - | 4.98 | 107,916 |
| Biggest Trading Partners - Spain | 0 | - | 4.91 | 53,618 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,698 |
| Biggest Trading Partners – United Kingdom | 0 | - | 4.93 | 79,841 |
| Countries Closest to the United Kingdom A-Z | 0 | - | 4.96 | 190,296 |
| All UK Parliament Constituencies on a Map | 0 | - | 4.60 | 28,629 |
| Countries of Asia in 1900 | 0 | - | 4.50 | 57,755 |
| Turkmenistan Country Quiz | 0 | - | 4.81 | 25,839 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 82,174 |
| Flags of Countries that Border China | 0 | - | 4.94 | 98,801 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 267,301 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 304,087 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 69,650 |
| Category Elimination - U.S. States #1 | 0 | - | 4.88 | 219,427 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 133,172 |
| Europe Map Quiz | 0 | - | 5.00 | 4,744,001 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,834 |
| Save Europeans by Guessing Countries | 0 | - | 4.83 | 210,889 |
| Countries of Europe After World War II | 0 | - | 4.99 | 187,597 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 155,833 |
| Countries of the Soviet Union | 0 | - | 4.98 | 194,174 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 73,077 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 434,965 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,447 |
| Pope Facts | 0 | - | 4.39 | 31,124 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 278,072 |
| Random Asian Countries on a Map | 0 | - | 4.90 | 169,279 |
| The Vietnam War | 0 | - | 4.43 | 35,388 |
| Communist Countries in History | 0 | - | 4.63 | 493,730 |
| History of India | 0 | - | 4.61 | 21,334 |
| Countries that Visit India the Most | 0 | - | 4.74 | 60,419 |
| Africa Map Quiz | 0 | - | 5.00 | 2,109,940 |
| African Countries with the Most Muslims | 0 | - | 4.80 | 100,606 |
| History of South Africa | 0 | - | 4.60 | 17,634 |
| Oceania Map Quiz | 0 | - | 4.98 | 638,157 |
| Australian Capitals | 0 | - | 4.92 | 62,648 |
| History of Mexico | 0 | - | 4.58 | 15,255 |
| United States Map Quiz | 0 | - | 4.98 | 4,147,612 |
| American Political Words | 0 | - | 4.39 | 23,375 |
| U.S. Political Figures by Picture #1 | 0 | - | 4.14 | 26,111 |
| U.S. Political Figures by Picture #2 | 0 | - | 4.10 | 15,488 |
| Female Political Figures by Picture - U.S. | 0 | - | 4.20 | 10,830 |
| U.S. Vice Presidents | 0 | - | 4.39 | 135,591 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,195 |
| First Ladies of the United States | 0 | - | 4.28 | 85,358 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,863 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,157 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 76,645 |
| U.S. President Scramble | 0 | - | 4.40 | 116,433 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,074 |
| Add a Letter - Make a U.S. President | 0 | - | 4.57 | 23,877 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,077 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,769 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,729 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 68,829 |
| Official European Union Languages | 0 | - | 4.97 | 237,578 |
| European Countries in their Native Language | 0 | - | 4.99 | 157,265 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 426,385 |
| Least Forested Countries in Asia | 0 | - | 4.74 | 64,542 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 93,756 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,437 |
| History of Austria | 0 | - | 4.70 | 17,794 |
| Geography of the French Empire | 0 | - | 4.45 | 26,988 |
| The French Revolution | 0 | - | 4.46 | 23,855 |
| History of France | 0 | - | 4.59 | 56,557 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,422 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,081 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,861 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,833 |
| Mythology A-Z | 0 | - | 4.31 | 37,091 |
| Figures from Greek Mythology | 0 | - | 4.91 | 185,748 |
| Countries in the Byzantine Empire | 0 | - | 4.95 | 71,878 |
| Byzantine History | 0 | - | 4.91 | 28,689 |
| Count in Roman Numerals - 30 Second Sprint | 0 | - | 4.26 | 101,984 |
| History of The Netherlands | 0 | - | 4.46 | 17,352 |
| The Vikings! | 0 | - | 4.46 | 28,281 |
| The Portuguese Empire | 0 | - | 4.58 | 12,026 |
| Arthurian Legend | 0 | - | 4.33 | 25,074 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,257 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,068 |
| Geography of the British Empire | 0 | - | 4.48 | 39,569 |
| Medieval English History | 0 | - | 4.53 | 43,385 |
| Places Where Winston Churchill Said We Would Fight the Nazis | 0 | - | 4.57 | 14,576 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,443,655 |
| Asia Map Quiz | 0 | - | 4.99 | 910,444 |
| Most Guessed Asian Capitals | 0 | - | 4.51 | 65,839 |
| Top 10 Most Forested Countries in Asia | 0 | - | 4.63 | 63,290 |
| Random Sequential Asian Countries on a Map | 0 | - | 4.99 | 118,562 |
| History of Iran | 0 | - | 4.66 | 16,299 |
| The Iraq War | 0 | - | 4.47 | 15,589 |
| Ottoman Empire Quiz | 0 | - | 4.42 | 17,071 |
| Vietnam War Countries | 0 | - | 4.83 | 93,867 |
| Chinese Inventions | 0 | - | 4.30 | 33,750 |
| History of China | 0 | - | 4.37 | 56,893 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,507 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,398 |
| Countries by Founding Story | 0 | - | 4.95 | 76,830 |
| Independence from Whom | 0 | - | 4.99 | 210,444 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,253 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,187 |
| India A-Z | 0 | - | 4.42 | 34,005 |
| Countries that Beat India | 0 | - | 4.41 | 62,721 |
| Countries of Africa | 0 | - | 5.00 | 2,519,545 |
| Africa Cities Map Quiz | 0 | - | 4.97 | 98,614 |
