| Prime Ministers of the UK | 0 | - | 4.95 | 441,262 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,718,040 |
| Prime Ministers of Australia | 0 | - | 4.51 | 32,134 |
| World Capitals Closest to Jerusalem | 0 | - | 4.47 | 45,024 |
| Name the Popes Quiz | 0 | - | 4.47 | 138,692 |
| Countries of the Popes | 0 | - | 4.79 | 128,543 |
| Paramount Leaders of China | 0 | - | 4.36 | 11,115 |
| Canadian Prime Ministers | 0 | - | 4.64 | 57,797 |
| The Dictator Files: Saddam Hussein | 0 | - | 4.48 | 15,909 |
| The Dictator Files: Chairman Mao | 0 | - | 4.28 | 20,728 |
| Country by Photo of its Leader | 0 | - | 4.70 | 124,464 |
| Soviet Leaders 1917–1991 | 0 | - | 4.44 | 95,388 |
| Biggest Trading Partners - China | 0 | - | 4.95 | 75,393 |
| Top 10 Oldest African Countries | 0 | - | 4.88 | 28,142 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 427,905 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 383,079 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 438,952 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,403 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,570 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 109,161 |
| U.S. Presidents by Event | 0 | - | 4.58 | 35,035 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.62 | 94,393 |
| Presidential Middle Names | 0 | - | 4.41 | 60,588 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,560 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,793 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 35,142 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,564 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 193,292 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,734 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,049 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 84,585 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,462 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,597 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,360 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,328 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,540 |
| Pope Facts | 0 | - | 4.39 | 31,342 |
| "Stan" Countries - Map Quiz | 0 | - | 4.98 | 136,988 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 104,473 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 73,035 |
| Countries in the Byzantine Empire | 0 | - | 4.95 | 72,371 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,429 |
| Name the English Monarchs | 0 | - | 4.91 | 505,262 |
| Asian Countries with the Most Christians | 0 | - | 4.86 | 97,733 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.87 | 136,462 |
| 10 Plagues of Egypt | 0 | - | 4.41 | 53,889 |
| Vietnam War Countries | 0 | - | 4.82 | 94,490 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,318 |
| African Countries with the Most Christians | 0 | - | 4.94 | 75,932 |
| Biggest Trading Partners – Australia | 0 | - | 4.93 | 61,859 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,578 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,750 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,326 |
| U.S. Presidential Running Mates | 0 | - | 4.41 | 28,714 |
| First Ladies of the United States | 0 | - | 4.28 | 85,846 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 24,025 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,278 |
| U.S. Presidents in Order by First Letter | 0 | - | 4.32 | 77,374 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,310 |
| Add a Letter - Make a U.S. President | 0 | - | 4.58 | 24,060 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,551 |
| Top 10 Most Jewish U.S. States | 0 | - | 4.31 | 43,081 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,682 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.37 | 48,610 |
| The Trojan War | 0 | - | 4.83 | 39,928 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 650,515 |
| Name that Greek Letter | 0 | - | 4.93 | 324,619 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,643 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,457 |
| Roman Emperors | 0 | - | 4.95 | 120,845 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 61,494 |
| Countries of Iberia in History with a Map | 0 | - | 4.88 | 42,247 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,700 |
| Every Asian Country Shape | 0 | - | 4.95 | 88,148 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 70,362 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,948 |
| Countries that Beat Israel | 0 | - | 4.38 | 30,348 |
| Countries Bordering China Since 1914 | 0 | - | 4.92 | 95,728 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 89,763 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 81,565 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,909 |
| National Founders | 0 | - | 4.40 | 83,931 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,764 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,720 |
| The John Adams Presidency | 0 | - | 4.12 | 8,770 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,759 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,894 |
| The American Revolution | 0 | - | 4.52 | 54,321 |
| U.S. States by Church Attendance | 0 | - | 4.59 | 32,525 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 162,051 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,903 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 71,835 |
| Olympian Gods Quiz | 0 | - | 4.96 | 502,885 |
| Ancient Greek Words | 0 | - | 4.93 | 112,210 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 127,088 |
| Biggest Trading Partners - Spain | 0 | - | 4.92 | 53,911 |
| Biggest Trading Partners – United Kingdom | 0 | - | 4.93 | 80,742 |
| Turkmenistan Country Quiz | 0 | - | 4.81 | 26,098 |
| Biggest Trading Partners - Turkey | 0 | - | 4.81 | 51,066 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 83,223 |
| Flags of Countries that Border China | 0 | - | 4.94 | 99,932 |
| The Dictator Files: Fidel Castro | 0 | - | 4.19 | 12,376 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,129 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,849 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 305,913 |
| The George Washington Presidency | 0 | - | 4.03 | 14,588 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,968 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,355 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,737 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 70,427 |
| Category Elimination - U.S. States #1 | 0 | - | 4.88 | 221,988 |
| Category Elimination - U.S. States #2 | 0 | - | 4.83 | 135,247 |
| Europe Map Quiz | 0 | - | 5.00 | 4,779,809 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 531,637 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 35,126 |
| Countries of Europe After World War II | 0 | - | 4.99 | 189,073 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 157,173 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 89,484 |
| History of Russia Quiz | 0 | - | 4.47 | 31,981 |
| Countries of the Soviet Union | 0 | - | 4.98 | 195,359 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.98 | 74,957 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,770 |
| History of Italy | 0 | - | 4.55 | 32,105 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,775 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,373 |
| Invasions of Great Britain | 0 | - | 4.51 | 60,037 |
| Tolkien's Middle Earth Map Quiz | 0 | - | 4.92 | 38,087 |
| Countries of Asia in 1900 | 0 | - | 4.50 | 58,181 |
| Random Asian Countries on a Map | 0 | - | 4.91 | 170,678 |
| Colonies of Africa with a Map | 0 | - | 4.79 | 54,659 |
| Communist Countries in History | 0 | - | 4.63 | 497,396 |
| History of South Africa | 0 | - | 4.60 | 17,740 |
| Oceania Map Quiz | 0 | - | 4.98 | 657,743 |
| Australian Capitals | 0 | - | 4.92 | 62,802 |
| History of Mexico | 0 | - | 4.52 | 15,354 |
| United States Map Quiz | 0 | - | 4.98 | 4,167,384 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 80,090 |
| Win the U.S. Presidential Election | 0 | - | 4.78 | 632,623 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,581 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,253 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,879 |
| U.S. President Scramble | 0 | - | 4.40 | 117,333 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,298 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 48,026 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 129,523 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,549 |
| Official European Union Languages | 0 | - | 4.97 | 239,397 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,416 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 430,102 |
| Least Forested Countries in Asia | 0 | - | 4.75 | 64,861 |
| Save Europeans by Guessing Countries | 0 | - | 4.86 | 215,825 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 94,290 |
| Soviet Union Country Quiz | 0 | - | 4.91 | 81,023 |
| History of Austria | 0 | - | 4.70 | 17,949 |
| Geography of the French Empire | 0 | - | 4.45 | 27,193 |
| The French Revolution | 0 | - | 4.47 | 24,108 |
| History of France | 0 | - | 4.61 | 57,453 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,539 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 145,310 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,165 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,999 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 20,912 |
| Figures from Greek Mythology | 0 | - | 4.91 | 188,304 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,552 |
| Byzantine History | 0 | - | 4.91 | 28,984 |
| Byzantine Emperors | 0 | - | 4.92 | 14,492 |
| Count in Roman Numerals - 30 Second Sprint | 0 | - | 4.27 | 103,502 |
| History of The Netherlands | 0 | - | 4.46 | 17,524 |
| The Vikings! | 0 | - | 4.46 | 28,388 |
| The Portuguese Empire | 0 | - | 4.58 | 12,094 |
| Arthurian Legend | 0 | - | 4.33 | 25,146 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,435 |
| Countries the UK Declared War On | 0 | - | 4.55 | 123,095 |
| Geography of the British Empire | 0 | - | 4.48 | 39,811 |
| Medieval English History | 0 | - | 4.53 | 43,616 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,450,981 |
| Asia Map Quiz | 0 | - | 4.99 | 922,786 |
| Asian Countries by First 2 Letters | 0 | - | 4.92 | 280,259 |
| Top 10 Most Forested Countries in Asia | 0 | - | 4.63 | 63,571 |
| Top 10 Richest Countries in Asia | 0 | - | 4.69 | 106,024 |
| Random Sequential Asian Countries on a Map | 0 | - | 4.99 | 119,430 |
| History of Iran | 0 | - | 4.66 | 16,402 |
| The Iraq War | 0 | - | 4.47 | 15,689 |
| Israel Country Quiz | 0 | - | 3.84 | 75,203 |
| Chinese Inventions | 0 | - | 4.30 | 33,844 |
| History of China | 0 | - | 4.35 | 57,453 |
| History of India | 0 | - | 4.62 | 21,486 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.69 | 55,591 |
| Africa Map Quiz | 0 | - | 5.00 | 2,125,676 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 269,009 |
| George Washington... or George W. Bush? | 0 | - | 4.16 | 12,286 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,760 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,997 |
| Countries by Founding Story | 0 | - | 4.95 | 77,557 |
| Independence from Whom | 0 | - | 4.99 | 212,586 |
| Political Movements by Country | 0 | - | 4.46 | 72,704 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 133,094 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,704 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,305 |
| European Countries Ending in "IA" | 0 | - | 4.96 | 68,815 |
