| Prime Ministers of the UK | 0 | - | 4.96 | 434,628 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,654,206 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,677 |
| World Capitals Closest to Jerusalem | 0 | - | 4.47 | 44,815 |
| Name the Popes Quiz | 0 | - | 4.47 | 137,154 |
| Countries of the Popes | 0 | - | 4.79 | 127,211 |
| Paramount Leaders of China | 0 | - | 4.36 | 10,998 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,038 |
| The Dictator Files: Chairman Mao | 0 | - | 4.28 | 20,574 |
| Country by Photo of its Leader | 0 | - | 4.74 | 123,256 |
| Soviet Leaders 1917–1991 | 0 | - | 4.43 | 94,432 |
| Biggest Trading Partners - China | 0 | - | 4.95 | 74,680 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 423,720 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 379,545 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 433,533 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,615 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,324 |
| U.S. Vice Presidents | 0 | - | 4.41 | 134,932 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 107,947 |
| U.S. Presidents by Event | 0 | - | 4.58 | 33,494 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 92,999 |
| Presidential Middle Names | 0 | - | 4.41 | 59,701 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 52,734 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 93,818 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,745 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,169 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 189,845 |
| Play-Doh Presidents | 0 | - | 5.00 | 81,673 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 148,946 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,418 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,408 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,110 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,018 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,313 |
| Pope Facts | 0 | - | 4.39 | 31,039 |
| "Stan" Countries - Map Quiz | 0 | - | 4.98 | 133,762 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 103,860 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 105,893 |
| African Countries with the Most Christians | 0 | - | 4.94 | 74,861 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,526 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,520 |
| Countries in the Byzantine Empire | 0 | - | 4.95 | 71,732 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,273 |
| Name the English Monarchs | 0 | - | 4.92 | 497,874 |
| Asian Countries with the Most Christians | 0 | - | 4.85 | 96,257 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.85 | 113,243 |
| 10 Plagues of Egypt | 0 | - | 4.39 | 52,134 |
| Vietnam War Countries | 0 | - | 4.83 | 93,609 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 80,677 |
| Biggest Trading Partners – Australia | 0 | - | 4.93 | 60,954 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,376 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,166 |
| First Ladies of the United States | 0 | - | 4.28 | 85,245 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,815 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,111 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 76,278 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,000 |
| Add a Letter - Make a U.S. President | 0 | - | 4.61 | 23,833 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,252 |
| Top 10 Most Jewish U.S. States | 0 | - | 4.31 | 42,736 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,686 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,144 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.37 | 48,288 |
| The Trojan War | 0 | - | 4.83 | 39,426 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 641,873 |
| Name that Greek Letter | 0 | - | 4.94 | 321,653 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,535 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,045 |
| Roman Emperors | 0 | - | 4.95 | 118,484 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 60,370 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,136 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 85,491 |
| Every Asian Country Shape | 0 | - | 4.95 | 86,701 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 69,214 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,275 |
| Countries that Beat Israel | 0 | - | 4.37 | 30,019 |
| Countries Bordering China Since 1914 | 0 | - | 4.93 | 94,727 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 88,444 |
| National Founders | 0 | - | 4.40 | 83,649 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 28,461 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,661 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,500 |
| The John Adams Presidency | 0 | - | 4.12 | 8,676 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,682 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,771 |
| The American Revolution | 0 | - | 4.52 | 54,055 |
| U.S. States by Church Attendance | 0 | - | 4.59 | 32,250 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 160,468 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,636 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 70,772 |
| Olympian Gods Quiz | 0 | - | 4.96 | 496,105 |
| Ancient Greek Words | 0 | - | 4.92 | 110,690 |
| 101 Figures from Greek Mythology | 0 | - | 5.00 | 124,284 |
| Biggest Trading Partners - Spain | 0 | - | 4.91 | 53,505 |
| Biggest Trading Partners – United Kingdom | 0 | - | 4.92 | 79,509 |
| Turkmenistan Country Quiz | 0 | - | 4.81 | 25,682 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 81,808 |
| Flags of Countries that Border China | 0 | - | 4.94 | 98,544 |
| Colonies of Africa with a Map | 0 | - | 4.77 | 53,943 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 28,882 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.49 | 11,670 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 303,362 |
| The George Washington Presidency | 0 | - | 4.03 | 14,475 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,870 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,213 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,609 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 69,413 |
| Category Elimination - U.S. States #1 | 0 | - | 4.87 | 218,543 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 132,503 |
| Europe Map Quiz | 0 | - | 5.00 | 4,731,186 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 526,338 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,744 |
| Countries of Europe After World War II | 0 | - | 4.99 | 186,740 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 155,351 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 88,039 |
| History of Russia Quiz | 0 | - | 4.49 | 31,792 |
| Countries of the Soviet Union | 0 | - | 4.98 | 193,835 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 72,460 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,305 |
| History of Italy | 0 | - | 4.55 | 31,814 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,481 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 76,981 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,387 |
| Tolkien's Middle Earth Map Quiz | 0 | - | 4.91 | 37,112 |
| Countries of Asia in 1900 | 0 | - | 4.50 | 57,621 |
| Random Asian Countries on a Map | 0 | - | 4.90 | 168,763 |
| Communist Countries in History | 0 | - | 4.63 | 492,505 |
| History of India | 0 | - | 4.61 | 21,284 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.68 | 55,174 |
| Africa Map Quiz | 0 | - | 5.00 | 2,104,260 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 266,527 |
| History of South Africa | 0 | - | 4.60 | 17,602 |
| Oceania Map Quiz | 0 | - | 4.98 | 635,292 |
| Australian Capitals | 0 | - | 4.92 | 62,593 |
| History of Mexico | 0 | - | 4.58 | 15,230 |
| United States Map Quiz | 0 | - | 4.98 | 4,141,781 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,736 |
| Win the U.S. Presidential Election | 0 | - | 4.80 | 618,465 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,363 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,087 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,447 |
| U.S. President Scramble | 0 | - | 4.40 | 116,198 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,023 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,695 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 128,687 |
| Count to 10 in Europe: Pro | 0 | - | 4.85 | 68,580 |
| Official European Union Languages | 0 | - | 4.97 | 236,521 |
| European Countries in their Native Language | 0 | - | 4.99 | 156,700 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 425,196 |
| Least Forested Countries in Asia | 0 | - | 4.74 | 64,419 |
| Save Europeans by Guessing Countries | 0 | - | 4.84 | 209,466 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 93,546 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,236 |
| History of Austria | 0 | - | 4.70 | 17,746 |
| Geography of the French Empire | 0 | - | 4.48 | 26,933 |
| The French Revolution | 0 | - | 4.46 | 23,784 |
| History of France | 0 | - | 4.59 | 56,041 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,383 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 143,174 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,774 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,768 |
| Figures from Greek Mythology | 0 | - | 4.91 | 184,942 |
| Countries Italy Declared War On | 0 | - | 4.75 | 42,948 |
| Byzantine History | 0 | - | 4.91 | 28,620 |
| Count in Roman Numerals - 30 Second Sprint | 0 | - | 4.26 | 101,472 |
| History of The Netherlands | 0 | - | 4.46 | 17,311 |
| The Vikings! | 0 | - | 4.45 | 28,245 |
| The Portuguese Empire | 0 | - | 4.54 | 11,990 |
| Arthurian Legend | 0 | - | 4.33 | 25,050 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,174 |
| Countries the UK Declared War On | 0 | - | 4.61 | 121,771 |
| Geography of the British Empire | 0 | - | 4.48 | 39,472 |
| Medieval English History | 0 | - | 4.53 | 43,317 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,440,453 |
| Asia Map Quiz | 0 | - | 4.99 | 906,987 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 277,099 |
| Top 10 Most Forested Countries in Asia | 0 | - | 4.63 | 63,181 |
| Top 10 Richest Countries in Asia | 0 | - | 4.73 | 104,797 |
| Random Sequential Asian Countries on a Map | 0 | - | 4.99 | 118,271 |
| History of Iran | 0 | - | 4.65 | 16,272 |
| The Iraq War | 0 | - | 4.47 | 15,552 |
| Ottoman Empire Quiz | 0 | - | 4.42 | 17,025 |
| Israel Country Quiz | 0 | - | 3.89 | 74,659 |
| Chinese Inventions | 0 | - | 4.30 | 33,719 |
| History of China | 0 | - | 4.37 | 56,691 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 92,939 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,163 |
| Countries by Founding Story | 0 | - | 4.95 | 76,531 |
| Independence from Whom | 0 | - | 4.99 | 209,679 |
| Political Movements by Country | 0 | - | 4.46 | 72,260 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 130,736 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 61,993 |
| Modern Day Countries of the Mughal Empire on a Map | 0 | - | 4.42 | 33,224 |
| Countries of Africa | 0 | - | 5.00 | 2,507,768 |
| Africa Cities Map Quiz | 0 | - | 4.97 | 98,433 |
| Flags of Africa Quiz | 0 | - | 5.00 | 463,313 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 45,813 |
| Top 10 Biggest African Countries by Area | 0 | - | 4.99 | 215,621 |
| 10 Southernmost Countries in Africa | 0 | - | 4.98 | 115,573 |
| 10 Northernmost Countries in Africa | 0 | - | 4.98 | 160,272 |
