| Prime Ministers of the UK | 0 | - | 4.95 | 439,199 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,950 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,549 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.87 | 134,660 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,699,898 |
| Paramount Leaders of China | 0 | - | 4.36 | 11,076 |
| Country by Photo of its Leader | 0 | - | 4.72 | 124,104 |
| Hindu Countries | 0 | - | 4.86 | 50,176 |
| The Dictator Files: Chairman Mao | 0 | - | 4.28 | 20,689 |
| Soviet Leaders 1917–1991 | 0 | - | 4.44 | 95,037 |
| Biggest Trading Partners - Turkey | 0 | - | 4.81 | 50,766 |
| Biggest Trading Partners - China | 0 | - | 4.95 | 75,179 |
| National Founders | 0 | - | 4.40 | 83,848 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 426,587 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 381,878 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 32,025 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,159 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,499 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 191,877 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,318 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,433 |
| Countries of Europe in 1848 | 0 | - | 4.99 | 82,146 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,730 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,059 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,926 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,821 |
| "Stan" Countries - Map Quiz | 0 | - | 4.98 | 135,884 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 104,265 |
| Political Movements by Country | 0 | - | 4.46 | 72,540 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,884 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 81,301 |
| Countries Bordering India | 0 | - | 4.98 | 163,446 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.69 | 55,458 |
| Countries Closest to India | 0 | - | 4.97 | 102,800 |
| African Countries with the Most Christians | 0 | - | 4.94 | 75,631 |
| Top 10 Richest Countries in Africa | 0 | - | 4.85 | 76,296 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 120,629 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,989 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,078 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,888 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,811 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,821 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,505 |
| Top 10 Richest Countries in Europe | 0 | - | 4.90 | 149,772 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 199,465 |
| Biggest Trading Partners - European Union | 0 | - | 4.91 | 72,833 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 90,100 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,340 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,303 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,658 |
| Name the English Monarchs | 0 | - | 4.91 | 502,893 |
| Name the Popes Quiz | 0 | - | 4.47 | 138,240 |
| Countries of the Popes | 0 | - | 4.79 | 128,146 |
| Every Asian Country Shape | 0 | - | 4.95 | 87,791 |
| Asian Countries with the Most Christians | 0 | - | 4.85 | 97,270 |
| Top 10 Richest Countries in Asia | 0 | - | 4.74 | 105,711 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,682 |
| Prime Ministers of Israel | 0 | - | 3.97 | 17,952 |
| Modern Day Countries of the Mughal Empire on a Map | 0 | - | 4.42 | 33,654 |
| Biggest Trading Partners – Australia | 0 | - | 4.93 | 61,582 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,537 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.37 | 48,510 |
| The Trojan War | 0 | - | 4.83 | 39,738 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 647,669 |
| Name that Greek Letter | 0 | - | 4.93 | 323,516 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,890 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,549 |
| Roman Emperors | 0 | - | 4.95 | 120,094 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 69,932 |
| Countries Bordering China Since 1914 | 0 | - | 4.93 | 95,262 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 89,314 |
| Countries with the Most Hindus | 0 | - | 4.90 | 123,055 |
| Colonies of Africa with a Map | 0 | - | 4.78 | 54,460 |
| Biggest Trading Partners - Colombia | 0 | - | 4.88 | 40,337 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 108,754 |
| U.S. Presidents by Event | 0 | - | 4.58 | 34,523 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 93,830 |
| Presidential Middle Names | 0 | - | 4.41 | 60,291 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,363 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,608 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 35,000 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,439 |
| The American Revolution | 0 | - | 4.52 | 54,261 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 529,671 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 161,531 |
| History of Russia Quiz | 0 | - | 4.47 | 31,922 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,962 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 71,500 |
| Olympian Gods Quiz | 0 | - | 4.96 | 500,998 |
| Ancient Greek Words | 0 | - | 4.93 | 111,647 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 126,056 |
| History of Italy | 0 | - | 4.55 | 31,980 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,464 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,664 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,242 |
| Countries Closest to Spain A-Z | 0 | - | 4.98 | 108,291 |
| Biggest Trading Partners - Spain | 0 | - | 4.92 | 53,790 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,875 |
| Biggest Trading Partners – United Kingdom | 0 | - | 4.93 | 80,374 |
| Countries Closest to the United Kingdom A-Z | 0 | - | 4.96 | 190,903 |
| All UK Parliament Constituencies on a Map | 0 | - | 4.60 | 28,830 |
| Countries of Asia in 1900 | 0 | - | 4.50 | 58,013 |
| Turkmenistan Country Quiz | 0 | - | 4.81 | 25,984 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 82,738 |
| Flags of Countries that Border China | 0 | - | 4.94 | 99,468 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 268,260 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 304,999 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 70,039 |
| Category Elimination - U.S. States #1 | 0 | - | 4.88 | 220,868 |
| Category Elimination - U.S. States #2 | 0 | - | 4.83 | 134,264 |
| Midwestern States of the U.S. | 0 | - | 4.88 | 13,821 |
| Europe Map Quiz | 0 | - | 5.00 | 4,764,142 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,996 |
| Save Europeans by Guessing Countries | 0 | - | 4.83 | 213,652 |
| Countries of Europe After World War II | 0 | - | 4.99 | 188,438 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 156,612 |
| Countries of the Soviet Union | 0 | - | 4.98 | 194,623 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.98 | 74,288 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 437,260 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,673 |
| Pope Facts | 0 | - | 4.39 | 31,255 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 279,219 |
| Random Asian Countries on a Map | 0 | - | 4.91 | 170,075 |
| The Vietnam War | 0 | - | 4.44 | 35,533 |
| Communist Countries in History | 0 | - | 4.63 | 495,852 |
| History of India | 0 | - | 4.62 | 21,432 |
| Countries that Visit India the Most | 0 | - | 4.74 | 60,812 |
| Africa Map Quiz | 0 | - | 5.00 | 2,118,404 |
| African Countries with the Most Muslims | 0 | - | 4.80 | 100,922 |
| History of South Africa | 0 | - | 4.60 | 17,692 |
| Oceania Map Quiz | 0 | - | 4.98 | 642,591 |
| Australian Capitals | 0 | - | 4.92 | 62,729 |
| History of Mexico | 0 | - | 4.58 | 15,310 |
| United States Map Quiz | 0 | - | 4.98 | 4,158,963 |
| American Political Words | 0 | - | 4.39 | 23,428 |
| U.S. Political Figures by Picture #1 | 0 | - | 4.14 | 26,164 |
| U.S. Political Figures by Picture #2 | 0 | - | 4.10 | 15,529 |
| Female Political Figures by Picture - U.S. | 0 | - | 4.20 | 10,865 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,283 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,262 |
| First Ladies of the United States | 0 | - | 4.28 | 85,658 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,959 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,229 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 77,107 |
| U.S. President Scramble | 0 | - | 4.40 | 116,797 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,201 |
| Add a Letter - Make a U.S. President | 0 | - | 4.57 | 23,968 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,193 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,903 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,832 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,162 |
| Official European Union Languages | 0 | - | 4.97 | 238,570 |
| European Countries in their Native Language | 0 | - | 4.99 | 157,900 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 428,314 |
| Least Forested Countries in Asia | 0 | - | 4.75 | 64,722 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 94,042 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,761 |
| History of Austria | 0 | - | 4.70 | 17,865 |
| Geography of the French Empire | 0 | - | 4.45 | 27,062 |
| The French Revolution | 0 | - | 4.47 | 23,946 |
| History of France | 0 | - | 4.59 | 57,005 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,311 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,009 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,917 |
| Mythology A-Z | 0 | - | 4.31 | 37,227 |
| Figures from Greek Mythology | 0 | - | 4.91 | 187,033 |
| Countries in the Byzantine Empire | 0 | - | 4.95 | 72,180 |
| Byzantine History | 0 | - | 4.91 | 28,874 |
| Byzantine Emperors | 0 | - | 4.92 | 14,190 |
| Count in Roman Numerals - 30 Second Sprint | 0 | - | 4.27 | 102,929 |
| History of The Netherlands | 0 | - | 4.46 | 17,437 |
| The Vikings! | 0 | - | 4.46 | 28,348 |
| The Portuguese Empire | 0 | - | 4.58 | 12,067 |
| Arthurian Legend | 0 | - | 4.33 | 25,113 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,356 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,504 |
| Geography of the British Empire | 0 | - | 4.48 | 39,680 |
| Medieval English History | 0 | - | 4.53 | 43,518 |
| Places Where Winston Churchill Said We Would Fight the Nazis | 0 | - | 4.57 | 14,612 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,448,435 |
| Asia Map Quiz | 0 | - | 4.99 | 917,158 |
| Most Guessed Asian Capitals | 0 | - | 4.51 | 65,911 |
| Top 10 Most Forested Countries in Asia | 0 | - | 4.63 | 63,451 |
| Random Sequential Asian Countries on a Map | 0 | - | 4.99 | 119,086 |
| History of Iran | 0 | - | 4.66 | 16,359 |
| The Iraq War | 0 | - | 4.47 | 15,655 |
| Vietnam War Countries | 0 | - | 4.82 | 94,234 |
| Chinese Inventions | 0 | - | 4.30 | 33,802 |
| History of China | 0 | - | 4.37 | 57,212 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,250 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,737 |
| Countries by Founding Story | 0 | - | 4.95 | 77,241 |
| Independence from Whom | 0 | - | 4.99 | 211,767 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 132,022 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,496 |
| Countries that Beat India | 0 | - | 4.42 | 63,024 |
| Biggest Cities in India | 0 | - | 4.64 | 67,767 |
| Countries of Africa | 0 | - | 5.00 | 2,538,133 |
| Africa Cities Map Quiz | 0 | - | 4.97 | 98,992 |
| Flags of Africa Quiz | 0 | - | 5.00 | 471,600 |
