| Prime Ministers of the UK | 0 | - | 4.95 | 438,255 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,691,702 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 436,572 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,426 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 191,509 |
| Figures from Greek Mythology | 0 | - | 4.91 | 186,600 |
| Countries Most-Visited By Queen Elizabeth II | 0 | - | 4.41 | 51,709 |
| Byzantine History | 0 | - | 4.91 | 28,770 |
| James Bond Countries Visited Map | 0 | - | 4.99 | 64,132 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,898 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 426,125 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,455 |
| Ultimate Harry Potter Name Game | 0 | - | 4.94 | 493,089 |
| Name the Popes Quiz | 0 | - | 4.47 | 137,994 |
| Countries of the Popes | 0 | - | 4.79 | 127,973 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 108,593 |
| U.S. Presidents by Event | 0 | - | 4.58 | 34,333 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 93,673 |
| Presidential Middle Names | 0 | - | 4.41 | 60,159 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 381,259 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,234 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,507 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,383 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,195 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 88,814 |
| Biggest English Cities by Century | 0 | - | 4.90 | 106,200 |
| Groups of Things - Harry Potter | 0 | - | 4.82 | 281,493 |
| Tolkien's Middle Earth Map Quiz | 0 | - | 4.92 | 37,762 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,273 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 304,743 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,955 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 69,916 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,006 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 79,495 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,417 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,810 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,714 |
| Soviet Leaders 1917–1991 | 0 | - | 4.44 | 94,892 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,919 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 144,409 |
| Countries of the German Empire | 0 | - | 4.51 | 37,888 |
| Country by Photo of its Leader | 0 | - | 4.72 | 123,938 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,704 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,834 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,132 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,245 |
| First Ladies of the United States | 0 | - | 4.28 | 85,579 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,937 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,211 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 76,993 |
| 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 | 190,620 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,808 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 646,574 |
| Name that Greek Letter | 0 | - | 4.93 | 323,233 |
| Roman to Greek God | 0 | - | 4.52 | 122,705 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,167 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,370 |
| Shakespeare's Plays Quiz | 0 | - | 4.37 | 387,700 |
| Basic Harry Potter Quiz | 0 | - | 4.56 | 378,604 |
| Name the English Monarchs | 0 | - | 4.91 | 501,905 |
| Pope Facts | 0 | - | 4.39 | 31,220 |
| Paramount Leaders of China | 0 | - | 4.36 | 11,059 |
| U.S. President Scramble | 0 | - | 4.40 | 116,696 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,856 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,438 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,778 |
| Olympian Gods Quiz | 0 | - | 4.96 | 500,117 |
| The Trojan War | 0 | - | 4.83 | 39,672 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,647 |
| Things with Names from Classical Mythology | 0 | - | 4.28 | 87,689 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 125,686 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,455 |
| Roman Emperors | 0 | - | 4.95 | 119,762 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 237,260 |
| The Dictator Files: Chairman Mao | 0 | - | 4.28 | 20,666 |
| National Founders | 0 | - | 4.40 | 83,808 |
| Colonies of Africa with a Map | 0 | - | 4.78 | 54,385 |
| 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 | 28,613 |
| 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 | 16,924 |
| 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 | 21,663 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,843 |
| Countries of Europe After World War II | 0 | - | 4.99 | 188,176 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 156,366 |
| 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 | 73,838 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,563 |
| Ancient Greek Words | 0 | - | 4.93 | 111,439 |
| History of Italy | 0 | - | 4.55 | 31,954 |
| 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 | 125,665 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,047 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,634 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,187 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,817 |
| Shakespeare Quotes | 0 | - | 4.43 | 71,372 |
| Harry Potter: Voldemort's Horcruxes | 0 | - | 4.44 | 112,691 |
| Top 100 UK Baby Girls' Names in 1850 | 0 | - | 4.35 | 61,996 |
| 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 | 495,183 |
| 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 | 267,998 |
| History of South Africa | 0 | - | 4.60 | 17,668 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,946 |
| Win the U.S. Presidential Election | 0 | - | 4.78 | 626,229 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,483 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,177 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,646 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,162 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 129,185 |
| Europe Map Quiz | 0 | - | 5.00 | 4,758,112 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 529,089 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,941 |
| Save Europeans by Guessing Countries | 0 | - | 4.83 | 212,619 |
| 25 Biggest Cities of the Soviet Union | 0 | - | 4.94 | 84,386 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 93,958 |
| 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 | 56,901 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.40 | 23,466 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,956 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,886 |
| Least Irish U.S. States | 0 | - | 4.49 | 18,301 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,280 |
| The Vikings! | 0 | - | 4.46 | 28,333 |
| 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 | 278,829 |
| Harry Potter Spells | 0 | - | 4.33 | 139,587 |
| Harry Potter Places | 0 | - | 4.34 | 108,185 |
| Harry Potter - Order of the Phoenix Members | 0 | - | 4.06 | 43,024 |
| Harry Potter Creatures | 0 | - | 4.29 | 64,015 |
| Word Scramble - Harry Potter Characters | 0 | - | 4.20 | 60,819 |
| Harry Potter Characters by Screen Time | 0 | - | 4.27 | 148,058 |
| 100 Most Common Words in Beatles Songs | 0 | - | 4.52 | 25,488 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,318 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,371 |
| Geography of the British Empire | 0 | - | 4.48 | 39,640 |
| Medieval English History | 0 | - | 4.53 | 43,483 |
| The Life of Winston Churchill | 0 | - | 4.16 | 11,841 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 278,831 |
| History of Iran | 0 | - | 4.66 | 16,346 |
| Prime Ministers of Israel | 0 | - | 3.97 | 17,930 |
| Vietnam War Countries | 0 | - | 4.82 | 94,131 |
| History of China | 0 | - | 4.37 | 57,112 |
| Political Movements by Country | 0 | - | 4.46 | 72,490 |
| Countries of Africa | 0 | - | 5.00 | 2,532,428 |
| Africa Cities Map Quiz | 0 | - | 4.97 | 98,920 |
| Flags of Africa Quiz | 0 | - | 5.00 | 469,986 |
| Africa Map Quiz | 0 | - | 5.00 | 2,115,806 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 46,705 |
| Top 10 Biggest African Countries by Area | 0 | - | 4.99 | 216,779 |
| 10 Southernmost Countries in Africa | 0 | - | 4.98 | 116,477 |
| 10 Northernmost Countries in Africa | 0 | - | 4.98 | 161,100 |
| Top 10 Smallest African Countries by Area | 0 | - | 4.96 | 33,162 |
| African East Coast | 0 | - | 4.96 | 95,916 |
| African Countries with the Shortest Names | 0 | - | 4.98 | 153,312 |
| Western Africa Map Quiz | 0 | - | 4.97 | 73,736 |
| Top African Languages on a Map | 0 | - | 4.92 | 73,808 |
| African Island Countries | 0 | - | 4.96 | 101,507 |
| Countries of Africa with an Empty Map | 0 | - | 5.00 | 243,207 |
| All First-Level Subdivisions of Africa on a Map | 0 | - | 4.92 | 33,169 |
| Oceania Map Quiz | 0 | - | 4.98 | 641,212 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 50,555 |
| Australian States and Territories | 0 | - | 4.96 | 141,791 |
| Australian Capitals | 0 | - | 4.92 | 62,707 |
| Australian Immigration by Country | 0 | - | 4.81 | 77,251 |
| Australia Map Quiz | 0 | - | 4.95 | 344,084 |
| Australia True or False | 0 | - | 4.87 | 56,803 |
| Flags of North and South America | 0 | - | 4.99 | 372,364 |
| 10 Biggest American Countries by Area | 0 | - | 4.95 | 112,552 |
| Top 10 Most Populous American Countries | 0 | - | 4.97 | 144,139 |
| Latin American Countries Map Quiz | 0 | - | 4.97 | 129,518 |
| History of Mexico | 0 | - | 4.58 | 15,298 |
| South America Map Quiz | 0 | - | 5.00 | 1,548,311 |
| Central America and Caribbean Map Quiz | 0 | - | 4.89 | 901,756 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,021,462 |
| North America Map Quiz | 0 | - | 4.98 | 248,028 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,678 |
| United States Map Quiz | 0 | - | 4.98 | 4,155,212 |
| U.S. States by Governor | 0 | - | 4.43 | 18,049 |
| 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 | 75,461 |
| Top 10 U.S. States by Democratic Party Support | 0 | - | 4.63 | 81,265 |
