| Prime Ministers of the UK | 0 | - | 4.95 | 439,211 |
| Hindu Countries | 0 | - | 4.86 | 50,177 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,954 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,552 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.87 | 134,673 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,700,095 |
| Paramount Leaders of China | 0 | - | 4.36 | 11,076 |
| Country by Photo of its Leader | 0 | - | 4.72 | 124,114 |
| The Dictator Files: Chairman Mao | 0 | - | 4.28 | 20,689 |
| Countries with the Most Hindus | 0 | - | 4.90 | 123,059 |
| Soviet Leaders 1917–1991 | 0 | - | 4.44 | 95,040 |
| Biggest Trading Partners - Turkey | 0 | - | 4.81 | 50,766 |
| Biggest Trading Partners - China | 0 | - | 4.95 | 75,180 |
| National Founders | 0 | - | 4.40 | 83,848 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 426,597 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 381,909 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 32,027 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,165 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,504 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 191,891 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,320 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,434 |
| Countries of Europe in 1848 | 0 | - | 4.99 | 82,164 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,734 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,060 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,932 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,822 |
| "Stan" Countries - Map Quiz | 0 | - | 4.98 | 135,891 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 104,266 |
| Political Movements by Country | 0 | - | 4.46 | 72,542 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,890 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 81,302 |
| 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 | 102,803 |
| African Countries with the Most Christians | 0 | - | 4.94 | 75,634 |
| Top 10 Richest Countries in Africa | 0 | - | 4.85 | 76,299 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 120,631 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,990 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,078 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,889 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,812 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,827 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,506 |
| Top 10 Richest Countries in Europe | 0 | - | 4.90 | 149,774 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 199,470 |
| Biggest Trading Partners - European Union | 0 | - | 4.91 | 72,834 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 90,106 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,343 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,307 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,663 |
| Name the English Monarchs | 0 | - | 4.91 | 502,915 |
| Name the Popes Quiz | 0 | - | 4.47 | 138,248 |
| Countries of the Popes | 0 | - | 4.79 | 128,149 |
| Every Asian Country Shape | 0 | - | 4.95 | 87,797 |
| Asian Countries with the Most Christians | 0 | - | 4.85 | 97,271 |
| Top 10 Richest Countries in Asia | 0 | - | 4.74 | 105,714 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,682 |
| Prime Ministers of Israel | 0 | - | 3.97 | 17,952 |
| Biggest Cities in India | 0 | - | 4.64 | 67,771 |
| Modern Day Countries of the Mughal Empire on a Map | 0 | - | 4.42 | 33,658 |
| Biggest Trading Partners – Australia | 0 | - | 4.93 | 61,587 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,540 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.37 | 48,510 |
| The Trojan War | 0 | - | 4.83 | 39,739 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 647,691 |
| Name that Greek Letter | 0 | - | 4.93 | 323,534 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,901 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,550 |
| Roman Emperors | 0 | - | 4.95 | 120,097 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 69,936 |
| Countries Bordering China Since 1914 | 0 | - | 4.93 | 95,263 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 89,318 |
| All Cities in India with Population of 1 Million | 0 | - | 4.83 | 47,571 |
| Colonies of Africa with a Map | 0 | - | 4.78 | 54,461 |
| Biggest Trading Partners - Colombia | 0 | - | 4.88 | 40,338 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 108,757 |
| U.S. Presidents by Event | 0 | - | 4.58 | 34,526 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.62 | 93,834 |
| Presidential Middle Names | 0 | - | 4.41 | 60,296 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,364 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,611 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 35,001 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,443 |
| The American Revolution | 0 | - | 4.52 | 54,261 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 529,688 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 161,538 |
| History of Russia Quiz | 0 | - | 4.47 | 31,923 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,962 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 71,501 |
| Olympian Gods Quiz | 0 | - | 4.96 | 501,008 |
| Ancient Greek Words | 0 | - | 4.93 | 111,650 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 126,071 |
| 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 | 108,292 |
| 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 | 80,381 |
| Countries Closest to the United Kingdom A-Z | 0 | - | 4.96 | 190,904 |
| All UK Parliament Constituencies on a Map | 0 | - | 4.60 | 28,831 |
| Countries of Asia in 1900 | 0 | - | 4.50 | 58,014 |
| Turkmenistan Country Quiz | 0 | - | 4.81 | 25,985 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 82,743 |
| Flags of Countries that Border China | 0 | - | 4.94 | 99,474 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 268,273 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 305,013 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 70,046 |
| Category Elimination - U.S. States #1 | 0 | - | 4.88 | 220,871 |
| Category Elimination - U.S. States #2 | 0 | - | 4.83 | 134,267 |
| Midwestern States of the U.S. | 0 | - | 4.88 | 13,822 |
| Europe Map Quiz | 0 | - | 5.00 | 4,764,232 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,997 |
| Save Europeans by Guessing Countries | 0 | - | 4.83 | 213,678 |
| Countries of Europe After World War II | 0 | - | 4.99 | 188,442 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 156,618 |
| Countries of the Soviet Union | 0 | - | 4.98 | 194,626 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.98 | 74,294 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 437,273 |
| 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 | 279,233 |
| Random Asian Countries on a Map | 0 | - | 4.91 | 170,082 |
| The Vietnam War | 0 | - | 4.44 | 35,533 |
| Communist Countries in History | 0 | - | 4.63 | 495,864 |
| History of India | 0 | - | 4.62 | 21,432 |
| Countries that Visit India the Most | 0 | - | 4.74 | 60,815 |
| Africa Map Quiz | 0 | - | 5.00 | 2,118,445 |
| African Countries with the Most Muslims | 0 | - | 4.80 | 100,923 |
| History of South Africa | 0 | - | 4.60 | 17,692 |
| Oceania Map Quiz | 0 | - | 4.98 | 642,601 |
| Australian Capitals | 0 | - | 4.92 | 62,729 |
| History of Mexico | 0 | - | 4.58 | 15,310 |
| United States Map Quiz | 0 | - | 4.98 | 4,159,062 |
| 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 | 136,290 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,264 |
| First Ladies of the United States | 0 | - | 4.28 | 85,662 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,959 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,230 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 77,114 |
| U.S. President Scramble | 0 | - | 4.40 | 116,802 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,206 |
| Add a Letter - Make a U.S. President | 0 | - | 4.57 | 23,970 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,194 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,904 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,835 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,164 |
| Official European Union Languages | 0 | - | 4.97 | 238,574 |
| European Countries in their Native Language | 0 | - | 4.99 | 157,902 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 428,317 |
| Least Forested Countries in Asia | 0 | - | 4.75 | 64,724 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 94,045 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,762 |
| History of Austria | 0 | - | 4.70 | 17,865 |
| Geography of the French Empire | 0 | - | 4.45 | 27,064 |
| The French Revolution | 0 | - | 4.47 | 23,950 |
| History of France | 0 | - | 4.59 | 57,007 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,311 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,010 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,917 |
| Mythology A-Z | 0 | - | 4.31 | 37,230 |
| Figures from Greek Mythology | 0 | - | 4.91 | 187,048 |
| Countries in the Byzantine Empire | 0 | - | 4.95 | 72,181 |
| Byzantine History | 0 | - | 4.91 | 28,874 |
| Byzantine Emperors | 0 | - | 4.92 | 14,197 |
| Count in Roman Numerals - 30 Second Sprint | 0 | - | 4.27 | 102,938 |
| 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 | 25,114 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,356 |
| Countries the UK Declared War On | 0 | - | 4.55 | 122,508 |
| Geography of the British Empire | 0 | - | 4.48 | 39,680 |
| Medieval English History | 0 | - | 4.53 | 43,520 |
| Places Where Winston Churchill Said We Would Fight the Nazis | 0 | - | 4.57 | 14,612 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,448,461 |
| Asia Map Quiz | 0 | - | 4.99 | 917,211 |
| Most Guessed Asian Capitals | 0 | - | 4.51 | 65,911 |
| Top 10 Most Forested Countries in Asia | 0 | - | 4.63 | 63,453 |
| Random Sequential Asian Countries on a Map | 0 | - | 4.99 | 119,090 |
| History of Iran | 0 | - | 4.66 | 16,359 |
| The Iraq War | 0 | - | 4.47 | 15,656 |
| Vietnam War Countries | 0 | - | 4.82 | 94,238 |
| Chinese Inventions | 0 | - | 4.30 | 33,802 |
| History of China | 0 | - | 4.37 | 57,213 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,256 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,737 |
| Countries by Founding Story | 0 | - | 4.95 | 77,243 |
| Independence from Whom | 0 | - | 4.99 | 211,771 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 132,049 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,498 |
| India A-Z | 0 | - | 4.42 | 34,137 |
| Countries that Beat India | 0 | - | 4.42 | 63,025 |
| Countries of Africa | 0 | - | 5.00 | 2,538,247 |
