| Prime Ministers of the UK | 0 | - | 4.95 | 438,228 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,691,500 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 436,558 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,424 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 191,502 |
| Figures from Greek Mythology | 0 | - | 4.91 | 186,596 |
| Countries Most-Visited By Queen Elizabeth II | 0 | - | 4.41 | 51,708 |
| Byzantine History | 0 | - | 4.91 | 28,768 |
| James Bond Countries Visited Map | 0 | - | 4.99 | 64,129 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,896 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 426,114 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,453 |
| Ultimate Harry Potter Name Game | 0 | - | 4.94 | 493,082 |
| Name the Popes Quiz | 0 | - | 4.47 | 137,986 |
| Countries of the Popes | 0 | - | 4.79 | 127,973 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 108,592 |
| U.S. Presidents by Event | 0 | - | 4.58 | 34,328 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 93,668 |
| Presidential Middle Names | 0 | - | 4.41 | 60,158 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 381,247 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,232 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,502 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,382 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,193 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 88,807 |
| Biggest English Cities by Century | 0 | - | 4.90 | 106,196 |
| Groups of Things - Harry Potter | 0 | - | 4.82 | 281,484 |
| Tolkien's Middle Earth Map Quiz | 0 | - | 4.92 | 37,758 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,269 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 304,730 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,954 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 69,913 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,002 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 79,290 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,410 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,803 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,711 |
| Soviet Leaders 1917–1991 | 0 | - | 4.44 | 94,891 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,916 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 144,404 |
| Countries of the German Empire | 0 | - | 4.51 | 37,887 |
| Country by Photo of its Leader | 0 | - | 4.72 | 123,936 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,694 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,832 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,128 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,245 |
| First Ladies of the United States | 0 | - | 4.28 | 85,575 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,935 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,211 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 76,992 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,172 |
| Add a Letter - Make a U.S. President | 0 | - | 4.57 | 23,944 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,613 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,807 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 646,554 |
| Name that Greek Letter | 0 | - | 4.93 | 323,228 |
| Roman to Greek God | 0 | - | 4.52 | 122,701 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,165 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,361 |
| Shakespeare's Plays Quiz | 0 | - | 4.37 | 387,690 |
| Basic Harry Potter Quiz | 0 | - | 4.56 | 378,599 |
| Name the English Monarchs | 0 | - | 4.91 | 501,890 |
| Pope Facts | 0 | - | 4.39 | 31,220 |
| Paramount Leaders of China | 0 | - | 4.36 | 11,058 |
| U.S. President Scramble | 0 | - | 4.40 | 116,693 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,854 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,434 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,776 |
| Olympian Gods Quiz | 0 | - | 4.96 | 500,076 |
| The Trojan War | 0 | - | 4.83 | 39,672 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,643 |
| Things with Names from Classical Mythology | 0 | - | 4.28 | 87,689 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 125,676 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,452 |
| Roman Emperors | 0 | - | 4.95 | 119,750 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 237,255 |
| The Dictator Files: Chairman Mao | 0 | - | 4.28 | 20,666 |
| National Founders | 0 | - | 4.40 | 83,806 |
| Colonies of Africa with a Map | 0 | - | 4.78 | 54,382 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,067 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,771 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 28,611 |
| The George Washington Presidency | 0 | - | 4.03 | 14,539 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,718 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,632 |
| The John Adams Presidency | 0 | - | 4.12 | 8,739 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,923 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,733 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,311 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,662 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,842 |
| Countries of Europe After World War II | 0 | - | 4.99 | 188,172 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 156,357 |
| History of Russia Quiz | 0 | - | 4.49 | 31,898 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.37 | 48,458 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 73,835 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,563 |
| Ancient Greek Words | 0 | - | 4.93 | 111,437 |
| History of Italy | 0 | - | 4.55 | 31,953 |
| Countries of the Italian Empire | 0 | - | 4.21 | 27,671 |
| Biggest Cities Once in the Roman Empire | 0 | - | 4.78 | 68,781 |
| Modern-Day Countries of the Roman Empire on a Map | 0 | - | 4.99 | 125,660 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,043 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,633 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,186 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,816 |
| Shakespeare Quotes | 0 | - | 4.43 | 71,371 |
| Harry Potter: Voldemort's Horcruxes | 0 | - | 4.44 | 112,690 |
| Top 100 UK Baby Girls' Names in 1850 | 0 | - | 4.35 | 61,993 |
| 10 Plagues of Egypt | 0 | - | 4.41 | 53,792 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 104,196 |
| Communist Countries in History | 0 | - | 4.63 | 495,169 |
| History of India | 0 | - | 4.62 | 21,408 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.69 | 55,413 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 267,991 |
| History of South Africa | 0 | - | 4.60 | 17,668 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,945 |
| Win the U.S. Presidential Election | 0 | - | 4.78 | 626,135 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,482 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,177 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,645 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,161 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 129,183 |
| Europe Map Quiz | 0 | - | 5.00 | 4,757,987 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 529,082 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,941 |
| Save Europeans by Guessing Countries | 0 | - | 4.83 | 212,589 |
| 25 Biggest Cities of the Soviet Union | 0 | - | 4.94 | 84,385 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 93,955 |
| History of Austria | 0 | - | 4.70 | 17,847 |
| Geography of the French Empire | 0 | - | 4.45 | 27,039 |
| The French Revolution | 0 | - | 4.46 | 23,918 |
| History of France | 0 | - | 4.59 | 56,895 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.40 | 23,466 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,955 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,886 |
| Least Irish U.S. States | 0 | - | 4.49 | 18,300 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,275 |
| The Vikings! | 0 | - | 4.46 | 28,332 |
| The Portuguese Empire | 0 | - | 4.58 | 12,054 |
| Biggest Cities in the Commonwealth of Nations | 0 | - | 4.56 | 65,457 |
| Biggest British Empire Countries | 0 | - | 4.74 | 99,843 |
| Name the Harry Potter Books | 0 | - | 4.31 | 278,823 |
| Harry Potter Spells | 0 | - | 4.33 | 139,583 |
| Harry Potter Places | 0 | - | 4.34 | 108,182 |
| Harry Potter - Order of the Phoenix Members | 0 | - | 4.06 | 43,024 |
| Harry Potter Creatures | 0 | - | 4.29 | 64,010 |
| Word Scramble - Harry Potter Characters | 0 | - | 4.20 | 60,818 |
| Harry Potter Characters by Screen Time | 0 | - | 4.27 | 148,053 |
| 100 Most Common Words in Beatles Songs | 0 | - | 4.52 | 25,483 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,318 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,367 |
| Geography of the British Empire | 0 | - | 4.48 | 39,640 |
| Medieval English History | 0 | - | 4.53 | 43,482 |
| The Life of Winston Churchill | 0 | - | 4.16 | 11,841 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 278,825 |
| History of Iran | 0 | - | 4.66 | 16,346 |
| Prime Ministers of Israel | 0 | - | 3.97 | 17,928 |
| Vietnam War Countries | 0 | - | 4.82 | 94,128 |
| History of China | 0 | - | 4.37 | 57,104 |
| Political Movements by Country | 0 | - | 4.46 | 72,488 |
| Countries of Africa | 0 | - | 5.00 | 2,532,306 |
| Africa Cities Map Quiz | 0 | - | 4.97 | 98,918 |
| Flags of Africa Quiz | 0 | - | 5.00 | 469,947 |
| Africa Map Quiz | 0 | - | 5.00 | 2,115,739 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 46,702 |
| Top 10 Biggest African Countries by Area | 0 | - | 4.99 | 216,774 |
| 10 Southernmost Countries in Africa | 0 | - | 4.98 | 116,471 |
| 10 Northernmost Countries in Africa | 0 | - | 4.98 | 161,089 |
| Top 10 Smallest African Countries by Area | 0 | - | 4.96 | 33,161 |
| African East Coast | 0 | - | 4.96 | 95,911 |
| African Countries with the Shortest Names | 0 | - | 4.98 | 153,300 |
| Western Africa Map Quiz | 0 | - | 4.97 | 73,733 |
| Top African Languages on a Map | 0 | - | 4.92 | 73,802 |
| African Island Countries | 0 | - | 4.96 | 101,497 |
| Countries of Africa with an Empty Map | 0 | - | 5.00 | 243,202 |
| All First-Level Subdivisions of Africa on a Map | 0 | - | 4.92 | 33,168 |
| Oceania Map Quiz | 0 | - | 4.98 | 641,184 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 50,552 |
| Australian States and Territories | 0 | - | 4.96 | 141,779 |
| Australian Capitals | 0 | - | 4.92 | 62,707 |
| Australian Immigration by Country | 0 | - | 4.81 | 77,249 |
| Australia Map Quiz | 0 | - | 4.95 | 344,080 |
| Australia True or False | 0 | - | 4.87 | 56,803 |
| Flags of North and South America | 0 | - | 4.99 | 372,332 |
| 10 Biggest American Countries by Area | 0 | - | 4.95 | 112,548 |
| Top 10 Most Populous American Countries | 0 | - | 4.97 | 144,138 |
| Latin American Countries Map Quiz | 0 | - | 4.97 | 129,511 |
| History of Mexico | 0 | - | 4.58 | 15,297 |
| South America Map Quiz | 0 | - | 5.00 | 1,548,287 |
| Central America and Caribbean Map Quiz | 0 | - | 4.89 | 901,739 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,021,401 |
| North America Map Quiz | 0 | - | 4.98 | 248,022 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,676 |
| United States Map Quiz | 0 | - | 4.98 | 4,155,141 |
| U.S. States by Governor | 0 | - | 4.43 | 18,048 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,511 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,678 |
| Top 10 U.S. States by Republican Party Support | 0 | - | 4.44 | 75,459 |
| Top 10 U.S. States by Democratic Party Support | 0 | - | 4.63 | 81,262 |
