| Prime Ministers of the UK | 0 | - | 4.96 | 434,457 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,652,344 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,664 |
| World Capitals Closest to Jerusalem | 0 | - | 4.47 | 44,813 |
| Name the Popes Quiz | 0 | - | 4.47 | 137,092 |
| Countries of the Popes | 0 | - | 4.79 | 127,162 |
| Paramount Leaders of China | 0 | - | 4.36 | 10,996 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,021 |
| The Dictator Files: Chairman Mao | 0 | - | 4.28 | 20,572 |
| Country by Photo of its Leader | 0 | - | 4.74 | 123,215 |
| Soviet Leaders 1917–1991 | 0 | - | 4.43 | 94,403 |
| Biggest Trading Partners - China | 0 | - | 4.95 | 74,664 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 423,550 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 379,489 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 433,376 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,597 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,279 |
| U.S. Vice Presidents | 0 | - | 4.41 | 134,874 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 107,919 |
| U.S. Presidents by Event | 0 | - | 4.58 | 33,437 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 92,978 |
| Presidential Middle Names | 0 | - | 4.41 | 59,682 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 52,708 |
| Assassinated U.S. Presidents | 0 | - | 4.61 | 93,792 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,727 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,158 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 189,760 |
| Play-Doh Presidents | 0 | - | 5.00 | 81,651 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 148,874 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,371 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,333 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,063 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 55,973 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,305 |
| Pope Facts | 0 | - | 4.39 | 31,031 |
| "Stan" Countries - Map Quiz | 0 | - | 4.98 | 133,692 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 103,844 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 105,826 |
| African Countries with the Most Christians | 0 | - | 4.94 | 74,834 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,506 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,509 |
| Countries in the Byzantine Empire | 0 | - | 4.95 | 71,717 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,201 |
| Name the English Monarchs | 0 | - | 4.92 | 497,728 |
| Asian Countries with the Most Christians | 0 | - | 4.85 | 96,186 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.85 | 113,201 |
| 10 Plagues of Egypt | 0 | - | 4.41 | 50,517 |
| Vietnam War Countries | 0 | - | 4.83 | 93,581 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 80,642 |
| Biggest Trading Partners – Australia | 0 | - | 4.93 | 60,935 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,373 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,162 |
| First Ladies of the United States | 0 | - | 4.28 | 85,227 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,812 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,108 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 76,259 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 15,996 |
| Add a Letter - Make a U.S. President | 0 | - | 4.61 | 23,825 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,207 |
| Top 10 Most Jewish U.S. States | 0 | - | 4.31 | 42,724 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,681 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,124 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.37 | 48,278 |
| The Trojan War | 0 | - | 4.83 | 39,419 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 641,657 |
| Name that Greek Letter | 0 | - | 4.94 | 321,568 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,485 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,023 |
| Roman Emperors | 0 | - | 4.95 | 118,411 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 60,336 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,115 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 85,458 |
| Every Asian Country Shape | 0 | - | 4.95 | 86,641 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 69,180 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,243 |
| Countries that Beat Israel | 0 | - | 4.37 | 30,008 |
| Countries Bordering China Since 1914 | 0 | - | 4.93 | 94,698 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 88,394 |
| National Founders | 0 | - | 4.40 | 83,642 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 28,457 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,658 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,488 |
| The John Adams Presidency | 0 | - | 4.12 | 8,675 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,681 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,770 |
| The American Revolution | 0 | - | 4.52 | 54,048 |
| U.S. States by Church Attendance | 0 | - | 4.59 | 32,234 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 160,427 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,626 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 70,742 |
| Olympian Gods Quiz | 0 | - | 4.96 | 495,721 |
| Ancient Greek Words | 0 | - | 4.92 | 110,635 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 124,196 |
| Biggest Trading Partners - Spain | 0 | - | 4.91 | 53,499 |
| Biggest Trading Partners – United Kingdom | 0 | - | 4.92 | 79,478 |
| Turkmenistan Country Quiz | 0 | - | 4.81 | 25,664 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 81,754 |
| Flags of Countries that Border China | 0 | - | 4.94 | 98,507 |
| Colonies of Africa with a Map | 0 | - | 4.77 | 53,925 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 28,877 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.49 | 11,669 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 303,312 |
| The George Washington Presidency | 0 | - | 4.03 | 14,473 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,866 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,205 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,608 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 69,376 |
| Category Elimination - U.S. States #1 | 0 | - | 4.87 | 218,432 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 132,431 |
| Europe Map Quiz | 0 | - | 5.00 | 4,729,885 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 526,224 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,735 |
| Countries of Europe After World War II | 0 | - | 4.99 | 186,660 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 155,300 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 88,008 |
| History of Russia Quiz | 0 | - | 4.49 | 31,784 |
| Countries of the Soviet Union | 0 | - | 4.98 | 193,783 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 72,407 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,288 |
| History of Italy | 0 | - | 4.55 | 31,809 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,476 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 76,974 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,376 |
| Tolkien's Middle Earth Map Quiz | 0 | - | 4.91 | 37,087 |
| Countries of Asia in 1900 | 0 | - | 4.50 | 57,607 |
| Random Asian Countries on a Map | 0 | - | 4.90 | 168,710 |
| Communist Countries in History | 0 | - | 4.63 | 492,360 |
| History of India | 0 | - | 4.61 | 21,276 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.68 | 55,155 |
| Africa Map Quiz | 0 | - | 5.00 | 2,103,733 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 266,459 |
| History of South Africa | 0 | - | 4.60 | 17,599 |
| Oceania Map Quiz | 0 | - | 4.98 | 635,021 |
| Australian Capitals | 0 | - | 4.92 | 62,589 |
| History of Mexico | 0 | - | 4.58 | 15,227 |
| United States Map Quiz | 0 | - | 4.98 | 4,141,090 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,732 |
| Win the U.S. Presidential Election | 0 | - | 4.80 | 618,124 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,360 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,084 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,440 |
| U.S. President Scramble | 0 | - | 4.40 | 116,178 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,015 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,689 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 128,661 |
| Count to 10 in Europe: Pro | 0 | - | 4.85 | 68,561 |
| Official European Union Languages | 0 | - | 4.97 | 236,465 |
| European Countries in their Native Language | 0 | - | 4.99 | 156,660 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 425,061 |
| Least Forested Countries in Asia | 0 | - | 4.74 | 64,407 |
| Save Europeans by Guessing Countries | 0 | - | 4.84 | 209,312 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 93,525 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,212 |
| History of Austria | 0 | - | 4.70 | 17,743 |
| Geography of the French Empire | 0 | - | 4.48 | 26,923 |
| The French Revolution | 0 | - | 4.46 | 23,773 |
| History of France | 0 | - | 4.59 | 55,973 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,380 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 143,115 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,760 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,765 |
| Figures from Greek Mythology | 0 | - | 4.91 | 184,852 |
| Countries Italy Declared War On | 0 | - | 4.75 | 42,930 |
| Byzantine History | 0 | - | 4.91 | 28,606 |
| Count in Roman Numerals - 30 Second Sprint | 0 | - | 4.26 | 101,428 |
| History of The Netherlands | 0 | - | 4.46 | 17,305 |
| The Vikings! | 0 | - | 4.45 | 28,240 |
| The Portuguese Empire | 0 | - | 4.54 | 11,987 |
| Arthurian Legend | 0 | - | 4.33 | 25,049 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,164 |
| Countries the UK Declared War On | 0 | - | 4.61 | 121,744 |
| Geography of the British Empire | 0 | - | 4.48 | 39,467 |
| Medieval English History | 0 | - | 4.53 | 43,306 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,439,377 |
| Asia Map Quiz | 0 | - | 4.99 | 906,642 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 277,060 |
| Top 10 Most Forested Countries in Asia | 0 | - | 4.63 | 63,170 |
| Top 10 Richest Countries in Asia | 0 | - | 4.73 | 104,759 |
| Random Sequential Asian Countries on a Map | 0 | - | 4.99 | 118,229 |
| History of Iran | 0 | - | 4.65 | 16,263 |
| The Iraq War | 0 | - | 4.47 | 15,547 |
| Ottoman Empire Quiz | 0 | - | 4.46 | 17,021 |
| Israel Country Quiz | 0 | - | 3.89 | 74,648 |
| Chinese Inventions | 0 | - | 4.30 | 33,717 |
| History of China | 0 | - | 4.37 | 56,677 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 92,837 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,125 |
| Countries by Founding Story | 0 | - | 4.95 | 76,495 |
| Independence from Whom | 0 | - | 4.99 | 209,602 |
| Political Movements by Country | 0 | - | 4.46 | 72,249 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 130,686 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 61,973 |
| Modern Day Countries of the Mughal Empire on a Map | 0 | - | 4.42 | 33,207 |
| Countries of Africa | 0 | - | 5.00 | 2,506,507 |
| Africa Cities Map Quiz | 0 | - | 4.97 | 98,421 |
| Flags of Africa Quiz | 0 | - | 5.00 | 462,933 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 45,778 |
| Top 10 Biggest African Countries by Area | 0 | - | 4.99 | 215,570 |
| 10 Southernmost Countries in Africa | 0 | - | 4.98 | 115,536 |
| 10 Northernmost Countries in Africa | 0 | - | 4.98 | 160,215 |
