| Prime Ministers of the UK | 0 | - | 4.96 | 434,782 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,689 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,058 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.85 | 113,270 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,655,854 |
| Paramount Leaders of China | 0 | - | 4.36 | 11,004 |
| Country by Photo of its Leader | 0 | - | 4.74 | 123,281 |
| Hindu Countries | 0 | - | 4.86 | 49,599 |
| The Dictator Files: Chairman Mao | 0 | - | 4.28 | 20,577 |
| Soviet Leaders 1917–1991 | 0 | - | 4.43 | 94,456 |
| Biggest Trading Partners - China | 0 | - | 4.95 | 74,694 |
| National Founders | 0 | - | 4.40 | 83,655 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 423,854 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 379,624 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,635 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,364 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 189,904 |
| Play-Doh Presidents | 0 | - | 5.00 | 81,688 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 148,985 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,454 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,451 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,144 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,038 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,646 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,541 |
| "Stan" Countries - Map Quiz | 0 | - | 4.98 | 133,830 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 103,869 |
| Political Movements by Country | 0 | - | 4.46 | 72,268 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 105,933 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 80,705 |
| Countries Bordering India | 0 | - | 4.98 | 162,622 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.68 | 55,183 |
| Countries Closest to India | 0 | - | 4.97 | 102,220 |
| African Countries with the Most Christians | 0 | - | 4.94 | 74,878 |
| Top 10 Richest Countries in Africa | 0 | - | 4.85 | 75,188 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 119,383 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,749 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 28,885 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,538 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.49 | 11,670 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,302 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,158 |
| Top 10 Richest Countries in Europe | 0 | - | 4.91 | 148,180 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 197,289 |
| Biggest Trading Partners - European Union | 0 | - | 4.91 | 72,125 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 88,996 |
| Countries Italy Declared War On | 0 | - | 4.75 | 42,971 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 85,536 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,334 |
| Name the English Monarchs | 0 | - | 4.92 | 498,080 |
| Name the Popes Quiz | 0 | - | 4.47 | 137,180 |
| Countries of the Popes | 0 | - | 4.79 | 127,247 |
| Every Asian Country Shape | 0 | - | 4.95 | 86,734 |
| Asian Countries with the Most Christians | 0 | - | 4.85 | 96,306 |
| Top 10 Richest Countries in Asia | 0 | - | 4.73 | 104,815 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,293 |
| Prime Ministers of Israel | 0 | - | 3.97 | 17,821 |
| Modern Day Countries of the Mughal Empire on a Map | 0 | - | 4.42 | 33,233 |
| Biggest Trading Partners – Australia | 0 | - | 4.93 | 60,971 |
| 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 | 39,444 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 642,064 |
| Name that Greek Letter | 0 | - | 4.94 | 321,724 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,583 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,064 |
| Roman Emperors | 0 | - | 4.95 | 118,516 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 69,236 |
| Biggest Trading Partners - Turkey | 0 | - | 4.80 | 50,193 |
| Countries Bordering China Since 1914 | 0 | - | 4.93 | 94,750 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 88,471 |
| Countries with the Most Hindus | 0 | - | 4.90 | 122,378 |
| Colonies of Africa with a Map | 0 | - | 4.77 | 53,961 |
| Biggest Trading Partners - Colombia | 0 | - | 4.88 | 39,982 |
| U.S. Vice Presidents | 0 | - | 4.41 | 134,966 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 107,973 |
| U.S. Presidents by Event | 0 | - | 4.58 | 33,525 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 93,019 |
| Presidential Middle Names | 0 | - | 4.41 | 59,720 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 52,755 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 93,840 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,752 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,177 |
| The American Revolution | 0 | - | 4.52 | 54,061 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 526,448 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 160,501 |
| History of Russia Quiz | 0 | - | 4.49 | 31,796 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,702 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 70,801 |
| Olympian Gods Quiz | 0 | - | 4.96 | 496,394 |
| Ancient Greek Words | 0 | - | 4.92 | 110,724 |
| 101 Figures from Greek Mythology | 0 | - | 5.00 | 124,340 |
| History of Italy | 0 | - | 4.55 | 31,824 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,321 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,489 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 76,986 |
| Countries Closest to Spain A-Z | 0 | - | 4.99 | 107,696 |
| Biggest Trading Partners - Spain | 0 | - | 4.91 | 53,512 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,457 |
| Biggest Trading Partners – United Kingdom | 0 | - | 4.92 | 79,530 |
| Countries Closest to the United Kingdom A-Z | 0 | - | 4.96 | 189,950 |
| All UK Parliament Constituencies on a Map | 0 | - | 4.60 | 28,549 |
| Countries of Asia in 1900 | 0 | - | 4.50 | 57,638 |
| Turkmenistan Country Quiz | 0 | - | 4.81 | 25,710 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 81,838 |
| Flags of Countries that Border China | 0 | - | 4.94 | 98,560 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 266,577 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 303,414 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 69,443 |
| Category Elimination - U.S. States #1 | 0 | - | 4.87 | 218,594 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 132,549 |
| Europe Map Quiz | 0 | - | 5.00 | 4,732,280 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,752 |
| Save Europeans by Guessing Countries | 0 | - | 4.84 | 209,627 |
| Countries of Europe After World War II | 0 | - | 4.99 | 186,783 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 155,392 |
| Countries of the Soviet Union | 0 | - | 4.98 | 193,866 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 72,507 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 433,641 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,400 |
| Pope Facts | 0 | - | 4.39 | 31,050 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 277,137 |
| Random Asian Countries on a Map | 0 | - | 4.90 | 168,819 |
| The Vietnam War | 0 | - | 4.43 | 35,300 |
| Communist Countries in History | 0 | - | 4.63 | 492,602 |
| History of India | 0 | - | 4.61 | 21,289 |
| Countries that Visit India the Most | 0 | - | 4.74 | 60,197 |
| Africa Map Quiz | 0 | - | 5.00 | 2,104,709 |
| African Countries with the Most Muslims | 0 | - | 4.80 | 100,436 |
| History of South Africa | 0 | - | 4.60 | 17,603 |
| Oceania Map Quiz | 0 | - | 4.98 | 635,494 |
| Australian Capitals | 0 | - | 4.92 | 62,594 |
| History of Mexico | 0 | - | 4.58 | 15,231 |
| United States Map Quiz | 0 | - | 4.98 | 4,142,253 |
| 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 | 85,252 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,817 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,114 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 76,325 |
| U.S. President Scramble | 0 | - | 4.40 | 116,221 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,004 |
| Add a Letter - Make a U.S. President | 0 | - | 4.61 | 23,839 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,031 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,697 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,692 |
| Count to 10 in Europe: Pro | 0 | - | 4.85 | 68,597 |
| Official European Union Languages | 0 | - | 4.97 | 236,805 |
| European Countries in their Native Language | 0 | - | 4.99 | 156,717 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 425,287 |
| Least Forested Countries in Asia | 0 | - | 4.74 | 64,431 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 93,559 |
| 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 | 23,788 |
| History of France | 0 | - | 4.59 | 56,096 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,388 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 26,939 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,781 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,774 |
| Mythology A-Z | 0 | - | 4.31 | 37,009 |
| Figures from Greek Mythology | 0 | - | 4.91 | 185,014 |
| Countries in the Byzantine Empire | 0 | - | 4.95 | 71,742 |
| Byzantine History | 0 | - | 4.91 | 28,627 |
| Count in Roman Numerals - 30 Second Sprint | 0 | - | 4.26 | 101,518 |
| History of The Netherlands | 0 | - | 4.46 | 17,317 |
| 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 | 53,189 |
| Countries the UK Declared War On | 0 | - | 4.61 | 121,813 |
| 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 | 14,546 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,440,885 |
| Asia Map Quiz | 0 | - | 4.99 | 907,285 |
| 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 | 118,298 |
| History of Iran | 0 | - | 4.65 | 16,272 |
| The Iraq War | 0 | - | 4.47 | 15,559 |
| Ottoman Empire Quiz | 0 | - | 4.42 | 17,028 |
| Vietnam War Countries | 0 | - | 4.83 | 93,630 |
| Chinese Inventions | 0 | - | 4.30 | 33,725 |
| History of China | 0 | - | 4.37 | 56,703 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,051 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,184 |
| Countries by Founding Story | 0 | - | 4.95 | 76,563 |
| Independence from Whom | 0 | - | 4.99 | 209,743 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 130,790 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,016 |
| Countries that Beat India | 0 | - | 4.41 | 62,595 |
| Biggest Cities in India | 0 | - | 4.70 | 67,343 |
| Countries of Africa | 0 | - | 5.00 | 2,508,687 |
| Africa Cities Map Quiz | 0 | - | 4.97 | 98,444 |
| Flags of Africa Quiz | 0 | - | 5.00 | 463,620 |
