| Prime Ministers of the UK | 0 | - | 4.95 | 440,607 |
| Hindu Countries | 0 | - | 4.86 | 50,347 |
| Prime Ministers of Australia | 0 | - | 4.50 | 32,080 |
| Canadian Prime Ministers | 0 | - | 4.64 | 57,723 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.87 | 135,923 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,711,787 |
| Paramount Leaders of China | 0 | - | 4.36 | 11,105 |
| Country by Photo of its Leader | 0 | - | 4.70 | 124,335 |
| The Dictator Files: Chairman Mao | 0 | - | 4.28 | 20,716 |
| Soviet Leaders 1917–1991 | 0 | - | 4.44 | 95,262 |
| Biggest Trading Partners - Turkey | 0 | - | 4.81 | 50,951 |
| Biggest Trading Partners - China | 0 | - | 4.95 | 75,323 |
| Countries with the Most Hindus | 0 | - | 4.90 | 123,263 |
| National Founders | 0 | - | 4.40 | 83,898 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 427,311 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 382,521 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,249 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,323 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,883 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 192,783 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,544 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,858 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 83,899 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,225 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,427 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,228 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,878 |
| "Stan" Countries - Map Quiz | 0 | - | 4.98 | 136,688 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 104,410 |
| Political Movements by Country | 0 | - | 4.46 | 72,653 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 80,058 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,118 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,971 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,838 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,356 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,630 |
| Top 10 Richest Countries in Europe | 0 | - | 4.90 | 150,119 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 199,962 |
| Biggest Trading Partners - European Union | 0 | - | 4.91 | 73,004 |
| Category Elimination - European Countries #1 | 0 | - | 4.90 | 90,522 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,463 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 61,370 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,583 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,152 |
| Name the English Monarchs | 0 | - | 4.91 | 504,489 |
| Name the Popes Quiz | 0 | - | 4.47 | 138,545 |
| Countries of the Popes | 0 | - | 4.79 | 128,419 |
| Every Asian Country Shape | 0 | - | 4.95 | 88,050 |
| Asian Countries with the Most Christians | 0 | - | 4.85 | 97,586 |
| Top 10 Richest Countries in Asia | 0 | - | 4.74 | 105,921 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,837 |
| Prime Ministers of Israel | 0 | - | 3.97 | 18,012 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,167 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 81,470 |
| Countries Bordering India | 0 | - | 4.98 | 163,615 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.69 | 55,544 |
| Countries Closest to India | 0 | - | 4.97 | 102,993 |
| African Countries with the Most Christians | 0 | - | 4.94 | 75,814 |
| Top 10 Richest Countries in Africa | 0 | - | 4.85 | 76,507 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 120,888 |
| Biggest Trading Partners – Australia | 0 | - | 4.93 | 61,757 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,566 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.37 | 48,580 |
| The Trojan War | 0 | - | 4.83 | 39,845 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 649,604 |
| Name that Greek Letter | 0 | - | 4.93 | 324,330 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,400 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,992 |
| Roman Emperors | 0 | - | 4.95 | 120,536 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 70,176 |
| Countries Bordering China Since 1914 | 0 | - | 4.92 | 95,627 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 89,587 |
| Biggest Cities in India | 0 | - | 4.64 | 67,899 |
| Modern Day Countries of the Mughal Empire on a Map | 0 | - | 4.42 | 33,734 |
| Biggest Trading Partners - Colombia | 0 | - | 4.88 | 40,426 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 109,006 |
| U.S. Presidents by Event | 0 | - | 4.58 | 34,817 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.62 | 94,211 |
| Presidential Middle Names | 0 | - | 4.41 | 60,469 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,488 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,699 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 35,077 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,513 |
| The American Revolution | 0 | - | 4.52 | 54,298 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 530,935 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 161,877 |
| History of Russia Quiz | 0 | - | 4.47 | 31,970 |
| The Reign of Napoleon | 0 | - | 4.54 | 39,048 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 71,732 |
| Olympian Gods Quiz | 0 | - | 4.96 | 502,246 |
| Ancient Greek Words | 0 | - | 4.93 | 112,039 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 126,719 |
| History of Italy | 0 | - | 4.55 | 32,084 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,513 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,745 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,323 |
| Countries Closest to Spain A-Z | 0 | - | 4.98 | 108,476 |
| Biggest Trading Partners - Spain | 0 | - | 4.92 | 53,874 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,991 |
| Biggest Trading Partners – United Kingdom | 0 | - | 4.93 | 80,608 |
| Countries Closest to the United Kingdom A-Z | 0 | - | 4.96 | 191,217 |
| All UK Parliament Constituencies on a Map | 0 | - | 4.60 | 28,932 |
| Countries of Asia in 1900 | 0 | - | 4.50 | 58,124 |
| Turkmenistan Country Quiz | 0 | - | 4.81 | 26,053 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 83,064 |
| Flags of Countries that Border China | 0 | - | 4.94 | 99,812 |
| All Cities in India with Population of 1 Million | 0 | - | 4.84 | 47,711 |
| Colonies of Africa with a Map | 0 | - | 4.79 | 54,585 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 305,605 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 70,270 |
| Category Elimination - U.S. States #1 | 0 | - | 4.88 | 221,610 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 134,762 |
| Midwestern States of the U.S. | 0 | - | 4.88 | 13,957 |
| Europe Map Quiz | 0 | - | 5.00 | 4,774,409 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 35,078 |
| Save Europeans by Guessing Countries | 0 | - | 4.86 | 214,973 |
| Countries of Europe After World War II | 0 | - | 4.99 | 188,861 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 156,971 |
| Countries of the Soviet Union | 0 | - | 4.98 | 195,223 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.98 | 74,737 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 438,364 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,739 |
| Pope Facts | 0 | - | 4.39 | 31,314 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 279,927 |
| Random Asian Countries on a Map | 0 | - | 4.91 | 170,482 |
| The Vietnam War | 0 | - | 4.44 | 35,593 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 268,751 |
| Communist Countries in History | 0 | - | 4.63 | 496,868 |
| History of South Africa | 0 | - | 4.60 | 17,728 |
| Oceania Map Quiz | 0 | - | 4.98 | 655,769 |
| Australian Capitals | 0 | - | 4.92 | 62,776 |
| History of Mexico | 0 | - | 4.58 | 15,341 |
| United States Map Quiz | 0 | - | 4.98 | 4,164,842 |
| American Political Words | 0 | - | 4.39 | 23,439 |
| U.S. Political Figures by Picture #1 | 0 | - | 4.14 | 26,184 |
| U.S. Political Figures by Picture #2 | 0 | - | 4.10 | 15,541 |
| Female Political Figures by Picture - U.S. | 0 | - | 4.22 | 10,876 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,597 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,298 |
| First Ladies of the United States | 0 | - | 4.28 | 85,783 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,990 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,255 |
| U.S. Presidents in Order by First Letter | 0 | - | 4.32 | 77,302 |
| U.S. President Scramble | 0 | - | 4.40 | 117,170 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,252 |
| Add a Letter - Make a U.S. President | 0 | - | 4.58 | 24,016 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,241 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,971 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,865 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,400 |
| Official European Union Languages | 0 | - | 4.97 | 239,081 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,236 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 429,507 |
| Least Forested Countries in Asia | 0 | - | 4.75 | 64,817 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 94,205 |
| Soviet Union Country Quiz | 0 | - | 4.91 | 80,915 |
| History of Austria | 0 | - | 4.70 | 17,923 |
| Geography of the French Empire | 0 | - | 4.45 | 27,168 |
| The French Revolution | 0 | - | 4.47 | 24,078 |
| History of France | 0 | - | 4.61 | 57,346 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,419 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,114 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,968 |
| Mythology A-Z | 0 | - | 4.31 | 37,313 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 20,869 |
| Figures from Greek Mythology | 0 | - | 4.91 | 187,950 |
| Countries in the Byzantine Empire | 0 | - | 4.95 | 72,302 |
| Byzantine History | 0 | - | 4.91 | 28,940 |
| Byzantine Emperors | 0 | - | 4.92 | 14,414 |
| Count in Roman Numerals - 30 Second Sprint | 0 | - | 4.27 | 103,336 |
| History of The Netherlands | 0 | - | 4.46 | 17,499 |
| The Vikings! | 0 | - | 4.46 | 28,375 |
| The Portuguese Empire | 0 | - | 4.58 | 12,087 |
| Arthurian Legend | 0 | - | 4.33 | 25,136 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,424 |
| Countries the UK Declared War On | 0 | - | 4.55 | 122,971 |
| Geography of the British Empire | 0 | - | 4.48 | 39,771 |
| Medieval English History | 0 | - | 4.53 | 43,591 |
| Places Where Winston Churchill Said We Would Fight the Nazis | 0 | - | 4.57 | 14,633 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,450,071 |
| Asia Map Quiz | 0 | - | 4.99 | 920,626 |
| Most Guessed Asian Capitals | 0 | - | 4.51 | 65,968 |
| Top 10 Most Forested Countries in Asia | 0 | - | 4.63 | 63,538 |
| Random Sequential Asian Countries on a Map | 0 | - | 4.99 | 119,295 |
| History of Iran | 0 | - | 4.66 | 16,390 |
| The Iraq War | 0 | - | 4.47 | 15,678 |
| Vietnam War Countries | 0 | - | 4.82 | 94,405 |
| Chinese Inventions | 0 | - | 4.30 | 33,828 |
| History of China | 0 | - | 4.37 | 57,374 |
| History of India | 0 | - | 4.62 | 21,468 |
| Countries that Visit India the Most | 0 | - | 4.74 | 61,030 |
| Africa Map Quiz | 0 | - | 5.00 | 2,123,052 |
| African Countries with the Most Muslims | 0 | - | 4.80 | 101,074 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,581 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,910 |
| Countries by Founding Story | 0 | - | 4.95 | 77,443 |
| Independence from Whom | 0 | - | 4.99 | 212,296 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 132,872 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,645 |
| Biggest Trading Partners - South Africa | 0 | - | 4.74 | 40,356 |
