| Prime Ministers of the UK | 0 | - | 4.95 | 439,139 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,699,533 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 437,224 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,460 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 191,852 |
| Figures from Greek Mythology | 0 | - | 4.91 | 187,014 |
| Countries Most-Visited By Queen Elizabeth II | 0 | - | 4.41 | 51,758 |
| Byzantine History | 0 | - | 4.91 | 28,869 |
| Byzantine Emperors | 0 | - | 4.92 | 14,178 |
| James Bond Countries Visited Map | 0 | - | 4.99 | 64,257 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,950 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 426,555 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,545 |
| Ultimate Harry Potter Name Game | 0 | - | 4.94 | 493,420 |
| Name the Popes Quiz | 0 | - | 4.47 | 138,233 |
| Countries of the Popes | 0 | - | 4.79 | 128,132 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 108,747 |
| U.S. Presidents by Event | 0 | - | 4.58 | 34,513 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 93,823 |
| Presidential Middle Names | 0 | - | 4.41 | 60,275 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 381,749 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,358 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,604 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,437 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,313 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 88,960 |
| Biggest English Cities by Century | 0 | - | 4.90 | 106,311 |
| Tolkien's Middle Earth Map Quiz | 0 | - | 4.92 | 37,867 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,489 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 304,985 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,997 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 70,032 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,424 |
| Countries of Europe in 1848 | 0 | - | 4.99 | 82,061 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,717 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,041 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,915 |
| Soviet Leaders 1917–1991 | 0 | - | 4.44 | 95,029 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 32,018 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 144,657 |
| Countries of the German Empire | 0 | - | 4.51 | 37,944 |
| Country by Photo of its Leader | 0 | - | 4.72 | 124,091 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,881 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,884 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,280 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,262 |
| First Ladies of the United States | 0 | - | 4.28 | 85,651 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,957 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,228 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 77,101 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,201 |
| Add a Letter - Make a U.S. President | 0 | - | 4.57 | 23,966 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,813 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,830 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 647,601 |
| Name that Greek Letter | 0 | - | 4.93 | 323,492 |
| Roman to Greek God | 0 | - | 4.52 | 122,843 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,297 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,646 |
| Shakespeare's Plays Quiz | 0 | - | 4.37 | 388,148 |
| Basic Harry Potter Quiz | 0 | - | 4.56 | 378,847 |
| Name the English Monarchs | 0 | - | 4.91 | 502,821 |
| Pope Facts | 0 | - | 4.39 | 31,251 |
| Paramount Leaders of China | 0 | - | 4.36 | 11,074 |
| U.S. President Scramble | 0 | - | 4.40 | 116,792 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,901 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,502 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,817 |
| Olympian Gods Quiz | 0 | - | 4.96 | 500,954 |
| The Trojan War | 0 | - | 4.83 | 39,734 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,872 |
| Things with Names from Classical Mythology | 0 | - | 4.28 | 87,782 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 126,040 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,544 |
| Roman Emperors | 0 | - | 4.95 | 120,081 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 237,445 |
| The Dictator Files: Chairman Mao | 0 | - | 4.28 | 20,686 |
| National Founders | 0 | - | 4.40 | 83,845 |
| Colonies of Africa with a Map | 0 | - | 4.78 | 54,454 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,077 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,811 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 28,639 |
| The George Washington Presidency | 0 | - | 4.03 | 14,548 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,734 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,652 |
| The John Adams Presidency | 0 | - | 4.12 | 8,748 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,935 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,744 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,325 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,678 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,854 |
| Countries of Europe After World War II | 0 | - | 4.99 | 188,413 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 156,606 |
| History of Russia Quiz | 0 | - | 4.47 | 31,921 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.37 | 48,503 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.98 | 74,279 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,622 |
| Ancient Greek Words | 0 | - | 4.93 | 111,633 |
| History of Italy | 0 | - | 4.55 | 31,979 |
| Countries of the Italian Empire | 0 | - | 4.21 | 27,695 |
| Biggest Cities Once in the Roman Empire | 0 | - | 4.80 | 72,748 |
| Modern-Day Countries of the Roman Empire on a Map | 0 | - | 4.99 | 125,932 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,152 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,664 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,241 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,873 |
| Shakespeare Quotes | 0 | - | 4.43 | 71,413 |
| Harry Potter: Voldemort's Horcruxes | 0 | - | 4.44 | 112,793 |
| Groups of Things - Harry Potter | 0 | - | 4.80 | 281,771 |
| Top 100 UK Baby Girls' Names in 1850 | 0 | - | 4.35 | 62,099 |
| 10 Plagues of Egypt | 0 | - | 4.41 | 53,824 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 104,265 |
| Communist Countries in History | 0 | - | 4.63 | 495,805 |
| History of India | 0 | - | 4.62 | 21,431 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.69 | 55,453 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 268,244 |
| History of South Africa | 0 | - | 4.60 | 17,692 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,988 |
| Win the U.S. Presidential Election | 0 | - | 4.78 | 627,854 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,502 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,195 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,684 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,190 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 129,277 |
| Europe Map Quiz | 0 | - | 5.00 | 4,763,842 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 529,653 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,995 |
| Save Europeans by Guessing Countries | 0 | - | 4.83 | 213,579 |
| 25 Biggest Cities of the Soviet Union | 0 | - | 4.94 | 84,514 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 94,037 |
| History of Austria | 0 | - | 4.70 | 17,863 |
| Geography of the French Empire | 0 | - | 4.45 | 27,061 |
| The French Revolution | 0 | - | 4.47 | 23,940 |
| History of France | 0 | - | 4.59 | 56,996 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,004 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,914 |
| Least Irish U.S. States | 0 | - | 4.49 | 18,313 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,339 |
| The Vikings! | 0 | - | 4.46 | 28,345 |
| The Portuguese Empire | 0 | - | 4.58 | 12,067 |
| Biggest Cities in the Commonwealth of Nations | 0 | - | 4.56 | 65,473 |
| Biggest British Empire Countries | 0 | - | 4.74 | 100,010 |
| Name the Harry Potter Books | 0 | - | 4.31 | 279,374 |
| Harry Potter Spells | 0 | - | 4.33 | 139,698 |
| Harry Potter Places | 0 | - | 4.34 | 108,301 |
| Harry Potter - Order of the Phoenix Members | 0 | - | 4.06 | 43,058 |
| Harry Potter Creatures | 0 | - | 4.29 | 64,110 |
| Word Scramble - Harry Potter Characters | 0 | - | 4.20 | 60,883 |
| Harry Potter Characters by Screen Time | 0 | - | 4.27 | 148,223 |
| 100 Most Common Words in Beatles Songs | 0 | - | 4.52 | 25,559 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,354 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,497 |
| Geography of the British Empire | 0 | - | 4.48 | 39,677 |
| Medieval English History | 0 | - | 4.53 | 43,515 |
| The Life of Winston Churchill | 0 | - | 4.16 | 11,845 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 279,193 |
| History of Iran | 0 | - | 4.66 | 16,358 |
| Prime Ministers of Israel | 0 | - | 3.97 | 17,952 |
| Vietnam War Countries | 0 | - | 4.82 | 94,231 |
| History of China | 0 | - | 4.37 | 57,212 |
| Political Movements by Country | 0 | - | 4.46 | 72,535 |
| Countries of Africa | 0 | - | 5.00 | 2,537,864 |
| Africa Cities Map Quiz | 0 | - | 4.97 | 98,982 |
| Flags of Africa Quiz | 0 | - | 5.00 | 471,535 |
| Africa Map Quiz | 0 | - | 5.00 | 2,118,291 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 46,852 |
| Top 10 Biggest African Countries by Area | 0 | - | 4.99 | 217,024 |
| 10 Southernmost Countries in Africa | 0 | - | 4.98 | 116,608 |
| 10 Northernmost Countries in Africa | 0 | - | 4.98 | 161,270 |
| Top 10 Smallest African Countries by Area | 0 | - | 4.96 | 33,285 |
| African East Coast | 0 | - | 4.96 | 96,092 |
| African Countries with the Shortest Names | 0 | - | 4.98 | 153,554 |
| Western Africa Map Quiz | 0 | - | 4.97 | 73,910 |
| Top African Languages on a Map | 0 | - | 4.92 | 74,103 |
| African Island Countries | 0 | - | 4.96 | 101,658 |
| Countries of Africa with an Empty Map | 0 | - | 5.00 | 243,449 |
| All First-Level Subdivisions of Africa on a Map | 0 | - | 4.92 | 33,305 |
| Oceania Map Quiz | 0 | - | 4.98 | 642,531 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 50,727 |
| Australian States and Territories | 0 | - | 4.96 | 142,005 |
| Australian Capitals | 0 | - | 4.92 | 62,727 |
| Australian Immigration by Country | 0 | - | 4.81 | 77,294 |
| Australia Map Quiz | 0 | - | 4.95 | 344,661 |
| Australia True or False | 0 | - | 4.87 | 56,867 |
| Flags of North and South America | 0 | - | 4.99 | 373,196 |
| 10 Biggest American Countries by Area | 0 | - | 4.95 | 112,622 |
| Top 10 Most Populous American Countries | 0 | - | 4.97 | 144,245 |
| Latin American Countries Map Quiz | 0 | - | 4.97 | 129,806 |
| History of Mexico | 0 | - | 4.58 | 15,309 |
| South America Map Quiz | 0 | - | 5.00 | 1,550,010 |
| Central America and Caribbean Map Quiz | 0 | - | 4.89 | 902,387 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,023,514 |
| North America Map Quiz | 0 | - | 4.98 | 248,611 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,743 |
| United States Map Quiz | 0 | - | 4.98 | 4,158,841 |
| U.S. States by Governor | 0 | - | 4.43 | 18,063 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,535 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,697 |
| Top 10 U.S. States by Republican Party Support | 0 | - | 4.44 | 75,521 |
| Top 10 U.S. States by Democratic Party Support | 0 | - | 4.63 | 81,353 |
