| Prime Ministers of the UK | 0 | - | 4.95 | 438,476 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,909 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,489 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.88 | 133,834 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,694,171 |
| Paramount Leaders of China | 0 | - | 4.36 | 11,063 |
| Country by Photo of its Leader | 0 | - | 4.72 | 123,986 |
| The Dictator Files: Chairman Mao | 0 | - | 4.28 | 20,669 |
| Soviet Leaders 1917–1991 | 0 | - | 4.44 | 94,928 |
| Biggest Trading Partners - Turkey | 0 | - | 4.81 | 50,692 |
| Biggest Trading Partners - China | 0 | - | 4.95 | 75,135 |
| National Founders | 0 | - | 4.40 | 83,817 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 426,244 |
| Prime Ministers of Israel | 0 | - | 3.97 | 17,935 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 381,377 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 191,628 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,226 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,789 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,951 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,085 |
| The Iraq War | 0 | - | 4.47 | 15,647 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 104,219 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,770 |
| African Countries with the Most Christians | 0 | - | 4.94 | 75,546 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 120,516 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,344 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,842 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 199,253 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,089 |
| Countries of Europe in 1848 | 0 | - | 4.99 | 80,685 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,521 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,878 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,774 |
| Countries in the Byzantine Empire | 0 | - | 4.95 | 72,100 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,468 |
| Name the Popes Quiz | 0 | - | 4.47 | 138,060 |
| Countries of the Popes | 0 | - | 4.79 | 128,029 |
| "Stan" Countries - Map Quiz | 0 | - | 4.98 | 135,659 |
| Asian Countries with the Most Christians | 0 | - | 4.85 | 97,151 |
| Political Movements by Country | 0 | - | 4.46 | 72,505 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 81,214 |
| Top 10 Richest Countries in Africa | 0 | - | 4.85 | 76,222 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,955 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,069 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,518 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,781 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,683 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,460 |
| Top 10 Richest Countries in Europe | 0 | - | 4.90 | 149,626 |
| Biggest Trading Partners - European Union | 0 | - | 4.91 | 72,779 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 89,961 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 646,862 |
| Name that Greek Letter | 0 | - | 4.93 | 323,305 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,296 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 61,049 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,213 |
| Name the English Monarchs | 0 | - | 4.91 | 502,194 |
| Every Asian Country Shape | 0 | - | 4.95 | 87,656 |
| Top 10 Richest Countries in Asia | 0 | - | 4.73 | 105,628 |
| The Persian Gulf War | 0 | - | 4.02 | 8,449 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,626 |
| Countries with the Most Hindus | 0 | - | 4.90 | 122,964 |
| Hindu Countries | 0 | - | 4.86 | 50,085 |
| Biggest Trading Partners – Australia | 0 | - | 4.93 | 61,530 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 108,639 |
| U.S. Presidents by Event | 0 | - | 4.58 | 34,384 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 93,721 |
| Presidential Middle Names | 0 | - | 4.41 | 60,185 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,277 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,545 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,397 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.37 | 48,468 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,937 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 71,418 |
| The Trojan War | 0 | - | 4.83 | 39,691 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,730 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 125,804 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,485 |
| Roman Emperors | 0 | - | 4.95 | 119,875 |
| Biggest Trading Partners - Spain | 0 | - | 4.92 | 53,766 |
| Biggest Trading Partners – United Kingdom | 0 | - | 4.93 | 80,287 |
| Turkmenistan Country Quiz | 0 | - | 4.81 | 25,957 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 69,822 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 82,618 |
| Countries Closest to Israel | 0 | - | 4.69 | 106,126 |
| Countries Bordering China Since 1914 | 0 | - | 4.93 | 95,194 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 89,207 |
| Colonies of Africa with a Map | 0 | - | 4.78 | 54,407 |
| Biggest Trading Partners - Colombia | 0 | - | 4.88 | 40,285 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 304,838 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,966 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 69,951 |
| The American Revolution | 0 | - | 4.52 | 54,234 |
| Category Elimination - U.S. States #1 | 0 | - | 4.88 | 220,622 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 134,061 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 529,236 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 161,384 |
| History of Russia Quiz | 0 | - | 4.47 | 31,905 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 73,975 |
| Olympian Gods Quiz | 0 | - | 4.96 | 500,430 |
| Ancient Greek Words | 0 | - | 4.93 | 111,502 |
| History of Italy | 0 | - | 4.55 | 31,960 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,432 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 436,787 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,643 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,207 |
| Countries Closest to Spain A-Z | 0 | - | 4.98 | 108,201 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,838 |
| Countries Closest to the United Kingdom A-Z | 0 | - | 4.96 | 190,764 |
| All UK Parliament Constituencies on a Map | 0 | - | 4.60 | 28,783 |
| Countries of Asia in 1900 | 0 | - | 4.50 | 57,960 |
| Random Asian Countries on a Map | 0 | - | 4.91 | 169,911 |
| World Capitals Closest to Jerusalem | 0 | - | 4.47 | 44,948 |
| 10 Plagues of Egypt | 0 | - | 4.41 | 53,802 |
| The Vietnam War | 0 | - | 4.44 | 35,510 |
| Flags of Countries that Border China | 0 | - | 4.94 | 99,163 |
| History of India | 0 | - | 4.62 | 21,413 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 268,056 |
| African Countries with the Most Muslims | 0 | - | 4.80 | 100,868 |
| History of South Africa | 0 | - | 4.60 | 17,679 |
| U.S. Political Figures by Picture #1 | 0 | - | 4.14 | 26,145 |
| U.S. Political Figures by Picture #2 | 0 | - | 4.10 | 15,512 |
| Female Political Figures by Picture - U.S. | 0 | - | 4.20 | 10,857 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,185 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,250 |
| First Ladies of the United States | 0 | - | 4.28 | 85,601 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,947 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,217 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 77,031 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,183 |
| Add a Letter - Make a U.S. President | 0 | - | 4.57 | 23,953 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,815 |
| Midwestern States of the U.S. | 0 | - | 4.88 | 13,720 |
| Europe Map Quiz | 0 | - | 5.00 | 4,759,753 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,959 |
| Least Forested Countries in Asia | 0 | - | 4.75 | 64,687 |
| Save Europeans by Guessing Countries | 0 | - | 4.83 | 212,824 |
| Countries of Europe After World War II | 0 | - | 4.99 | 188,243 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 156,431 |
| Countries of the Soviet Union | 0 | - | 4.98 | 194,522 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 93,980 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,687 |
| History of Austria | 0 | - | 4.70 | 17,854 |
| Geography of the French Empire | 0 | - | 4.45 | 27,046 |
| The French Revolution | 0 | - | 4.46 | 23,924 |
| History of France | 0 | - | 4.59 | 56,930 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,274 |
| Mythology A-Z | 0 | - | 4.31 | 37,203 |
| Figures from Greek Mythology | 0 | - | 4.91 | 186,759 |
| Count in Roman Numerals - 30 Second Sprint | 0 | - | 4.26 | 102,779 |
| The Vikings! | 0 | - | 4.46 | 28,337 |
| The Portuguese Empire | 0 | - | 4.58 | 12,059 |
| Arthurian Legend | 0 | - | 4.33 | 25,106 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,643 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,328 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,412 |
| Geography of the British Empire | 0 | - | 4.48 | 39,654 |
| Pope Facts | 0 | - | 4.39 | 31,226 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 278,924 |
| Random Sequential Asian Countries on a Map | 0 | - | 4.99 | 118,965 |
| History of Iran | 0 | - | 4.66 | 16,351 |
| History of China | 0 | - | 4.37 | 57,139 |
| Communist Countries in History | 0 | - | 4.63 | 495,373 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.69 | 55,424 |
| Modern Day Countries of the Mughal Empire on a Map | 0 | - | 4.42 | 33,603 |
| Countries of Africa | 0 | - | 5.00 | 2,534,064 |
| Africa Map Quiz | 0 | - | 5.00 | 2,116,633 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 46,747 |
| African East Coast | 0 | - | 4.96 | 95,964 |
| Western Africa Map Quiz | 0 | - | 4.97 | 73,792 |
| Oceania Map Quiz | 0 | - | 4.98 | 641,597 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 50,600 |
| Australian Capitals | 0 | - | 4.92 | 62,714 |
| Australia A-Z | 0 | - | 4.54 | 49,959 |
| Australia Map Quiz | 0 | - | 4.95 | 344,214 |
| History of Mexico | 0 | - | 4.58 | 15,304 |
| United States Map Quiz | 0 | - | 4.98 | 4,156,455 |
| U.S. States by Governor | 0 | - | 4.43 | 18,057 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,686 |
| American Political Words | 0 | - | 4.39 | 23,410 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,667 |
| Red State or Blue State Trait? | 0 | - | 4.42 | 55,328 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,492 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 28,623 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,183 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,723 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,660 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,642 |
| U.S. President Scramble | 0 | - | 4.40 | 116,724 |
| The John Adams Presidency | 0 | - | 4.12 | 8,742 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,742 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,848 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,172 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,557 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,867 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,105 |
| U.S. History for Dummies | 0 | - | 4.47 | 83,009 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 212,051 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,627 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,198 |
