| Prime Ministers of the UK | 0 | - | 4.96 | 434,020 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,648,183 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,639 |
| World Capitals Closest to Jerusalem | 0 | - | 4.47 | 44,804 |
| Name the Popes Quiz | 0 | - | 4.47 | 136,939 |
| Countries of the Popes | 0 | - | 4.79 | 127,062 |
| Paramount Leaders of China | 0 | - | 4.36 | 10,985 |
| Canadian Prime Ministers | 0 | - | 4.63 | 56,960 |
| The Dictator Files: Chairman Mao | 0 | - | 4.28 | 20,560 |
| Country by Photo of its Leader | 0 | - | 4.74 | 123,137 |
| Soviet Leaders 1917–1991 | 0 | - | 4.43 | 94,344 |
| Biggest Trading Partners - China | 0 | - | 4.95 | 74,640 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 423,225 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 379,315 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 433,062 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,541 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,142 |
| U.S. Vice Presidents | 0 | - | 4.41 | 134,714 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 107,833 |
| U.S. Presidents by Event | 0 | - | 4.58 | 33,340 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 92,901 |
| Presidential Middle Names | 0 | - | 4.41 | 59,630 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 52,656 |
| Assassinated U.S. Presidents | 0 | - | 4.61 | 93,731 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,703 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,144 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 189,581 |
| Play-Doh Presidents | 0 | - | 5.00 | 81,589 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 148,749 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,283 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,226 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 69,976 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 55,894 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,292 |
| Pope Facts | 0 | - | 4.39 | 31,010 |
| "Stan" Countries - Map Quiz | 0 | - | 4.98 | 133,523 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 103,817 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 105,697 |
| African Countries with the Most Christians | 0 | - | 4.94 | 74,772 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,476 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,480 |
| Countries in the Byzantine Empire | 0 | - | 4.95 | 71,675 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,091 |
| Name the English Monarchs | 0 | - | 4.92 | 497,318 |
| Asian Countries with the Most Christians | 0 | - | 4.85 | 96,064 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.85 | 113,146 |
| 10 Plagues of Egypt | 0 | - | 4.41 | 45,648 |
| Vietnam War Countries | 0 | - | 4.83 | 93,528 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 80,602 |
| Biggest Trading Partners – Australia | 0 | - | 4.93 | 60,884 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,364 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,155 |
| First Ladies of the United States | 0 | - | 4.28 | 85,191 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,807 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,098 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 76,178 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 15,978 |
| Add a Letter - Make a U.S. President | 0 | - | 4.61 | 23,815 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,112 |
| Top 10 Most Jewish U.S. States | 0 | - | 4.31 | 42,694 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,668 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,090 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.37 | 48,258 |
| The Trojan War | 0 | - | 4.83 | 39,392 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 641,119 |
| Name that Greek Letter | 0 | - | 4.94 | 321,413 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,327 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 83,955 |
| Roman Emperors | 0 | - | 4.95 | 118,270 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 60,275 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,060 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 85,381 |
| Every Asian Country Shape | 0 | - | 4.95 | 86,488 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 69,121 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,195 |
| Countries that Beat Israel | 0 | - | 4.37 | 29,994 |
| Countries Bordering China Since 1914 | 0 | - | 4.93 | 94,597 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 88,314 |
| National Founders | 0 | - | 4.40 | 83,614 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 28,442 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,653 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,428 |
| The John Adams Presidency | 0 | - | 4.12 | 8,673 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,678 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,762 |
| The American Revolution | 0 | - | 4.52 | 54,030 |
| U.S. States by Church Attendance | 0 | - | 4.59 | 32,201 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 160,349 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,612 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 70,678 |
| Olympian Gods Quiz | 0 | - | 4.96 | 494,529 |
| Ancient Greek Words | 0 | - | 4.92 | 110,532 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 124,028 |
| Biggest Trading Partners - Spain | 0 | - | 4.91 | 53,476 |
| Biggest Trading Partners – United Kingdom | 0 | - | 4.92 | 79,404 |
| Turkmenistan Country Quiz | 0 | - | 4.81 | 25,645 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 81,670 |
| Flags of Countries that Border China | 0 | - | 4.94 | 98,447 |
| Colonies of Africa with a Map | 0 | - | 4.77 | 53,886 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 28,868 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.49 | 11,660 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 303,150 |
| The George Washington Presidency | 0 | - | 4.03 | 14,469 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,861 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,195 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,601 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 69,308 |
| Category Elimination - U.S. States #1 | 0 | - | 4.87 | 217,962 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 132,252 |
| Europe Map Quiz | 0 | - | 5.00 | 4,726,957 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 525,979 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,714 |
| Countries of Europe After World War II | 0 | - | 4.99 | 186,550 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 155,182 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 87,913 |
| History of Russia Quiz | 0 | - | 4.49 | 31,771 |
| Countries of the Soviet Union | 0 | - | 4.98 | 193,688 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 72,315 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,258 |
| History of Italy | 0 | - | 4.55 | 31,796 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,459 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 76,958 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,353 |
| Tolkien's Middle Earth Map Quiz | 0 | - | 4.91 | 37,034 |
| Countries of Asia in 1900 | 0 | - | 4.50 | 57,578 |
| Random Asian Countries on a Map | 0 | - | 4.90 | 168,566 |
| Communist Countries in History | 0 | - | 4.63 | 492,063 |
| History of India | 0 | - | 4.61 | 21,263 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.68 | 55,125 |
| Africa Map Quiz | 0 | - | 5.00 | 2,102,579 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 266,316 |
| History of South Africa | 0 | - | 4.60 | 17,590 |
| Oceania Map Quiz | 0 | - | 4.98 | 634,371 |
| Australian Capitals | 0 | - | 4.92 | 62,584 |
| History of Mexico | 0 | - | 4.58 | 15,217 |
| United States Map Quiz | 0 | - | 4.98 | 4,139,472 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,703 |
| Win the U.S. Presidential Election | 0 | - | 4.80 | 617,284 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,345 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,078 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,417 |
| U.S. President Scramble | 0 | - | 4.40 | 116,134 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 22,991 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,667 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 128,614 |
| Count to 10 in Europe: Pro | 0 | - | 4.85 | 68,511 |
| Official European Union Languages | 0 | - | 4.97 | 236,329 |
| European Countries in their Native Language | 0 | - | 4.99 | 156,592 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 424,804 |
| Least Forested Countries in Asia | 0 | - | 4.74 | 64,378 |
| Save Europeans by Guessing Countries | 0 | - | 4.84 | 209,018 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 93,473 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,172 |
| History of Austria | 0 | - | 4.70 | 17,734 |
| Geography of the French Empire | 0 | - | 4.48 | 26,911 |
| The French Revolution | 0 | - | 4.46 | 23,746 |
| History of France | 0 | - | 4.59 | 55,865 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,369 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 142,982 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,737 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,745 |
| Figures from Greek Mythology | 0 | - | 4.91 | 184,648 |
| Countries Italy Declared War On | 0 | - | 4.75 | 42,905 |
| Byzantine History | 0 | - | 4.91 | 28,579 |
| Count in Roman Numerals - 30 Second Sprint | 0 | - | 4.26 | 101,326 |
| History of The Netherlands | 0 | - | 4.46 | 17,296 |
| The Vikings! | 0 | - | 4.45 | 28,234 |
| The Portuguese Empire | 0 | - | 4.54 | 11,979 |
| Arthurian Legend | 0 | - | 4.33 | 25,045 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,153 |
| Countries the UK Declared War On | 0 | - | 4.61 | 121,688 |
| Geography of the British Empire | 0 | - | 4.48 | 39,455 |
| Medieval English History | 0 | - | 4.53 | 43,289 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,436,931 |
| Asia Map Quiz | 0 | - | 4.99 | 905,631 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 276,906 |
| Top 10 Most Forested Countries in Asia | 0 | - | 4.63 | 63,139 |
| Top 10 Richest Countries in Asia | 0 | - | 4.73 | 104,704 |
| Random Sequential Asian Countries on a Map | 0 | - | 4.99 | 118,152 |
| History of Iran | 0 | - | 4.65 | 16,256 |
| The Iraq War | 0 | - | 4.47 | 15,538 |
| Ottoman Empire Quiz | 0 | - | 4.46 | 16,993 |
| Israel Country Quiz | 0 | - | 3.89 | 74,612 |
| Chinese Inventions | 0 | - | 4.30 | 33,711 |
| History of China | 0 | - | 4.37 | 56,636 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 92,583 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,079 |
| Countries by Founding Story | 0 | - | 4.95 | 76,440 |
| Independence from Whom | 0 | - | 4.99 | 209,444 |
| Political Movements by Country | 0 | - | 4.46 | 72,221 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 130,578 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 61,937 |
| Modern Day Countries of the Mughal Empire on a Map | 0 | - | 4.42 | 33,180 |
| Countries of Africa | 0 | - | 5.00 | 2,504,041 |
| Africa Cities Map Quiz | 0 | - | 4.97 | 98,172 |
| Flags of Africa Quiz | 0 | - | 5.00 | 462,135 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 45,700 |
| Top 10 Biggest African Countries by Area | 0 | - | 4.99 | 215,460 |
| 10 Southernmost Countries in Africa | 0 | - | 4.98 | 115,453 |
| 10 Northernmost Countries in Africa | 0 | - | 4.98 | 160,144 |
