| Prime Ministers of the UK | 0 | - | 4.96 | 435,533 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,740 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,173 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.85 | 113,417 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,663,842 |
| Biggest Trading Partners - Turkey | 0 | - | 4.80 | 50,276 |
| Paramount Leaders of China | 0 | - | 4.36 | 11,016 |
| Country by Photo of its Leader | 0 | - | 4.74 | 123,438 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 69,354 |
| The Dictator Files: Chairman Mao | 0 | - | 4.28 | 20,596 |
| Soviet Leaders 1917–1991 | 0 | - | 4.43 | 94,563 |
| Byzantine History | 0 | - | 4.91 | 28,664 |
| Biggest Trading Partners - China | 0 | - | 4.95 | 74,761 |
| National Founders | 0 | - | 4.40 | 83,687 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 424,316 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 379,964 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,638 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,717 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,538 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 190,260 |
| Play-Doh Presidents | 0 | - | 5.00 | 81,787 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,217 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,647 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,676 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,315 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,200 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,680 |
| "Stan" Countries - Map Quiz | 0 | - | 4.98 | 134,192 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 103,934 |
| Political Movements by Country | 0 | - | 4.46 | 72,330 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,105 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 80,808 |
| African Countries with the Most Christians | 0 | - | 4.94 | 74,991 |
| Top 10 Richest Countries in Africa | 0 | - | 4.85 | 75,286 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 119,515 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,789 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 28,911 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,593 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.49 | 11,683 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,499 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,221 |
| Top 10 Richest Countries in Europe | 0 | - | 4.90 | 148,351 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 197,583 |
| Biggest Trading Partners - European Union | 0 | - | 4.91 | 72,238 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 89,184 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,055 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,566 |
| Name the English Monarchs | 0 | - | 4.92 | 498,992 |
| Name the Popes Quiz | 0 | - | 4.47 | 137,361 |
| Countries of the Popes | 0 | - | 4.79 | 127,402 |
| Every Asian Country Shape | 0 | - | 4.95 | 86,840 |
| Asian Countries with the Most Christians | 0 | - | 4.85 | 96,463 |
| Top 10 Richest Countries in Asia | 0 | - | 4.73 | 104,975 |
| 15 Largest Cities in the Middle East With a Map | 0 | - | 4.92 | 117,550 |
| Countries Bordering Iran | 0 | - | 4.83 | 94,891 |
| Countries that Border Iraq | 0 | - | 4.97 | 107,950 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,359 |
| Prime Ministers of Israel | 0 | - | 3.97 | 17,841 |
| Hindu Countries | 0 | - | 4.86 | 49,683 |
| Biggest Trading Partners – Australia | 0 | - | 4.93 | 61,065 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,394 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.37 | 48,340 |
| The Trojan War | 0 | - | 4.83 | 39,490 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 643,223 |
| Name that Greek Letter | 0 | - | 4.94 | 322,066 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,852 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,157 |
| Roman Emperors | 0 | - | 4.95 | 118,777 |
| Egypt Country Quiz | 0 | - | 4.82 | 77,145 |
| Countries Bordering China Since 1914 | 0 | - | 4.93 | 94,837 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 88,616 |
| Countries with the Most Hindus | 0 | - | 4.90 | 122,496 |
| Colonies of Africa with a Map | 0 | - | 4.78 | 54,063 |
| Biggest Trading Partners - Colombia | 0 | - | 4.88 | 40,041 |
| U.S. Vice Presidents | 0 | - | 4.41 | 135,309 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 108,100 |
| U.S. Presidents by Event | 0 | - | 4.58 | 33,708 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 93,152 |
| Presidential Middle Names | 0 | - | 4.41 | 59,807 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 52,852 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 93,961 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,788 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,220 |
| The American Revolution | 0 | - | 4.52 | 54,103 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 526,903 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 160,666 |
| History of Russia Quiz | 0 | - | 4.49 | 31,814 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,766 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 70,910 |
| Olympian Gods Quiz | 0 | - | 4.96 | 497,353 |
| Ancient Greek Words | 0 | - | 4.92 | 110,899 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 124,684 |
| History of Italy | 0 | - | 4.55 | 31,861 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,340 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,520 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,029 |
| Countries Closest to Spain A-Z | 0 | - | 4.99 | 107,810 |
| Biggest Trading Partners - Spain | 0 | - | 4.92 | 53,563 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,634 |
| Biggest Trading Partners – United Kingdom | 0 | - | 4.92 | 79,680 |
| Countries Closest to the United Kingdom A-Z | 0 | - | 4.96 | 190,143 |
| All UK Parliament Constituencies on a Map | 0 | - | 4.60 | 28,591 |
| Countries of Asia in 1900 | 0 | - | 4.50 | 57,685 |
| Turkmenistan Country Quiz | 0 | - | 4.81 | 25,788 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 82,007 |
| Countries that Beat Egypt | 0 | - | 4.88 | 56,681 |
| Countries Closest to Israel | 0 | - | 4.67 | 105,328 |
| Flags of Countries that Border China | 0 | - | 4.94 | 98,681 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 266,821 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 303,752 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 69,544 |
| Category Elimination - U.S. States #1 | 0 | - | 4.88 | 218,968 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 132,844 |
| Europe Map Quiz | 0 | - | 5.00 | 4,738,243 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,805 |
| Save Europeans by Guessing Countries | 0 | - | 4.84 | 210,268 |
| Countries of Europe After World War II | 0 | - | 4.99 | 186,988 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 155,594 |
| Countries of the Soviet Union | 0 | - | 4.98 | 194,030 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 434,398 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,422 |
| Pope Facts | 0 | - | 4.39 | 31,089 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 277,756 |
| Random Asian Countries on a Map | 0 | - | 4.90 | 169,055 |
| The Vietnam War | 0 | - | 4.43 | 35,343 |
| Communist Countries in History | 0 | - | 4.63 | 493,205 |
| History of India | 0 | - | 4.61 | 21,313 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.69 | 55,233 |
| Africa Map Quiz | 0 | - | 5.00 | 2,106,954 |
| African Countries with the Most Muslims | 0 | - | 4.80 | 100,537 |
| History of South Africa | 0 | - | 4.60 | 17,623 |
| Oceania Map Quiz | 0 | - | 4.98 | 636,760 |
| Australian Capitals | 0 | - | 4.92 | 62,613 |
| History of Mexico | 0 | - | 4.58 | 15,244 |
| United States Map Quiz | 0 | - | 4.98 | 4,145,043 |
| American Political Words | 0 | - | 4.39 | 23,356 |
| U.S. Political Figures by Picture #1 | 0 | - | 4.14 | 26,089 |
| 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 | 20,178 |
| First Ladies of the United States | 0 | - | 4.28 | 85,313 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,835 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,131 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 76,493 |
| U.S. President Scramble | 0 | - | 4.40 | 116,326 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,037 |
| Add a Letter - Make a U.S. President | 0 | - | 4.61 | 23,852 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,056 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,734 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,711 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 68,725 |
| Official European Union Languages | 0 | - | 4.97 | 237,252 |
| European Countries in their Native Language | 0 | - | 4.99 | 157,089 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 425,842 |
| Least Forested Countries in Asia | 0 | - | 4.74 | 64,489 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 93,658 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,343 |
| History of Austria | 0 | - | 4.70 | 17,777 |
| Geography of the French Empire | 0 | - | 4.45 | 26,963 |
| The French Revolution | 0 | - | 4.46 | 23,826 |
| History of France | 0 | - | 4.59 | 56,354 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,405 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,012 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,821 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,803 |
| Mythology A-Z | 0 | - | 4.31 | 37,054 |
| Figures from Greek Mythology | 0 | - | 4.91 | 185,402 |
| Countries in the Byzantine Empire | 0 | - | 4.95 | 71,810 |
| Count in Roman Numerals - 30 Second Sprint | 0 | - | 4.26 | 101,749 |
| History of The Netherlands | 0 | - | 4.46 | 17,343 |
| The Vikings! | 0 | - | 4.46 | 28,264 |
| The Portuguese Empire | 0 | - | 4.54 | 12,006 |
| Arthurian Legend | 0 | - | 4.33 | 25,061 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,232 |
| Countries the UK Declared War On | 0 | - | 4.61 | 121,970 |
| Geography of the British Empire | 0 | - | 4.48 | 39,532 |
| Medieval English History | 0 | - | 4.53 | 43,351 |
| Places Where Winston Churchill Said We Would Fight the Nazis | 0 | - | 4.57 | 14,565 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,442,451 |
| Asia Map Quiz | 0 | - | 4.99 | 908,723 |
| Most Guessed Asian Capitals | 0 | - | 4.51 | 65,811 |
| Top 10 Most Forested Countries in Asia | 0 | - | 4.63 | 63,238 |
| Random Sequential Asian Countries on a Map | 0 | - | 4.99 | 118,438 |
| Flags of the Middle East | 0 | - | 4.69 | 62,402 |
| History of Iran | 0 | - | 4.65 | 16,285 |
| Iran Country Quiz | 0 | - | 4.53 | 60,010 |
| Iraq Country Quiz | 0 | - | 4.43 | 40,748 |
| The Iraq War | 0 | - | 4.47 | 15,574 |
| Biggest Cities in Turkey on a Map | 0 | - | 4.25 | 20,282 |
| Ottoman Empire Quiz | 0 | - | 4.42 | 17,053 |
| English Words of Arabic Origin | 0 | - | 4.54 | 49,637 |
| Vietnam War Countries | 0 | - | 4.83 | 93,751 |
| Chinese Inventions | 0 | - | 4.30 | 33,739 |
| History of China | 0 | - | 4.37 | 56,784 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,285 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,283 |
| Countries by Founding Story | 0 | - | 4.95 | 76,685 |
| Independence from Whom | 0 | - | 4.99 | 210,068 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,004 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,105 |
