| Vatican City Country Quiz | 0 | - | 4.53 | 44,645 |
| Prime Ministers of the UK | 0 | - | 4.95 | 442,077 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 383,480 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 428,341 |
| Most-Visited Countries by Popes | 0 | - | 4.56 | 84,131 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,723,876 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,836 |
| Random Sequential European Countries on a Map | 0 | - | 4.99 | 217,981 |
| Soviet Leaders 1917–1991 | 0 | - | 4.44 | 95,528 |
| Shakespeare Quotes | 0 | - | 4.43 | 71,559 |
| Prime Ministers of Australia | 0 | - | 4.51 | 32,187 |
| Canadian Prime Ministers | 0 | - | 4.64 | 57,893 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 439,591 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,602 |
| Name a Valid U.S. President #1 | 0 | - | 4.90 | 193,687 |
| Random European Countries on a Map | 0 | - | 4.97 | 284,975 |
| Figures from Greek Mythology | 0 | - | 4.91 | 188,712 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,563 |
| Top 100 Harry Potter Characters by Mention | 0 | - | 4.93 | 397,075 |
| Random Sequential Asian Countries on a Map | 0 | - | 4.99 | 119,550 |
| Random Sequential African Countries on a Map | 0 | - | 5.00 | 128,312 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,772 |
| Random U.S. Presidents by Picture | 0 | - | 4.40 | 66,584 |
| Random Sequential U.S. States on a Map | 0 | - | 4.99 | 235,192 |
| Top 10 Oldest African Countries | 0 | - | 4.88 | 28,208 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,286 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 85,202 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,682 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,777 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,513 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,413 |
| Shakespeare's Plays Quiz | 0 | - | 4.37 | 389,946 |
| Name the Popes Quiz | 0 | - | 4.47 | 138,869 |
| Countries of the Popes | 0 | - | 4.79 | 128,689 |
| The Dictator Files: Saddam Hussein | 0 | - | 4.48 | 15,924 |
| Country by Photo of its Leader | 0 | - | 4.70 | 124,595 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 73,082 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 109,527 |
| U.S. Presidents by Event | 0 | - | 4.58 | 35,273 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.62 | 94,593 |
| Presidential Middle Names | 0 | - | 4.41 | 60,700 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,273 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,672 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,881 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,910 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,621 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,333 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,717 |
| Every European Country Shape | 0 | - | 4.96 | 202,856 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 97,001 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 134,115 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,924 |
| Olympian Gods Quiz | 0 | - | 4.96 | 503,550 |
| The Trojan War | 0 | - | 4.83 | 39,966 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 651,559 |
| Name that Greek Letter | 0 | - | 4.93 | 324,891 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,875 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,561 |
| Roman Emperors | 0 | - | 4.95 | 121,104 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 61,621 |
| Countries of Iberia in History with a Map | 0 | - | 4.88 | 42,344 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,833 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,670 |
| James Bond Countries Visited Map | 0 | - | 4.99 | 64,709 |
| Shakespearean Phrases | 0 | - | 4.57 | 36,874 |
| Name the English Monarchs | 0 | - | 4.91 | 506,123 |
| Commonwealth of Nations Countries | 0 | - | 4.95 | 238,219 |
| Paramount Leaders of China | 0 | - | 4.36 | 11,126 |
| The Dictator Files: Chairman Mao | 0 | - | 4.28 | 20,746 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,455 |
| National Founders | 0 | - | 4.40 | 83,962 |
| The Dictator Files: Fidel Castro | 0 | - | 4.19 | 12,388 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 306,137 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 35,185 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 70,551 |
| Random U.S. States on a Map | 0 | - | 4.96 | 629,982 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,735 |
| Europe Map with Random Merged Countries | 0 | - | 4.97 | 320,374 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 89,682 |
| Countries of the Soviet Union | 0 | - | 4.98 | 195,506 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.37 | 48,636 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 75,244 |
| Ancient Greek Words | 0 | - | 4.93 | 112,401 |
| Roman to Greek God | 0 | - | 4.52 | 123,317 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 127,434 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,487 |
| Biggest Trading Partners – United Kingdom | 0 | - | 4.93 | 80,921 |
| Harry Potter Last Names | 0 | - | 4.64 | 951,565 |
| Countries Most-Visited By Queen Elizabeth II | 0 | - | 4.42 | 51,959 |
| Pope Facts | 0 | - | 4.39 | 31,378 |
| Random Asian Countries on a Map | 0 | - | 4.91 | 170,889 |
| Random African Countries on a Map | 0 | - | 4.99 | 297,729 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 80,134 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,141 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,861 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,937 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,358 |
| U.S. Presidential Running Mates | 0 | - | 4.41 | 28,760 |
| First Ladies of the United States | 0 | - | 4.28 | 85,934 |
| The Bill Clinton Presidency | 0 | - | 4.24 | 31,531 |
| The George H. W. Bush Presidency | 0 | - | 4.36 | 21,550 |
| The Ronald Reagan Presidency | 0 | - | 4.26 | 24,890 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.42 | 24,060 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,307 |
| U.S. Presidents in Order by First Letter | 0 | - | 4.32 | 77,453 |
| U.S. President Scramble | 0 | - | 4.40 | 117,438 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,357 |
| Most-Visited Countries by U.S. Presidents | 0 | - | 4.96 | 194,663 |
| Add a Letter - Make a U.S. President | 0 | - | 4.58 | 24,090 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,800 |
| Win the 1828 U.S. Presidential Election | 0 | - | 4.31 | 58,251 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 48,075 |
| The Barack Obama Presidency | 0 | - | 4.14 | 25,500 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,937 |
| Europe Map Quiz | 0 | - | 5.00 | 4,785,918 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 532,296 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 35,173 |
| History of Russia Quiz | 0 | - | 4.47 | 31,999 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 94,405 |
| Soviet Union Country Quiz | 0 | - | 4.91 | 81,120 |
| History of France | 0 | - | 4.61 | 57,570 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 145,579 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,215 |
| Geography of Ancient Greece | 0 | - | 4.69 | 32,035 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 20,953 |
| Things with Names from Classical Mythology | 0 | - | 4.28 | 88,030 |
| History of Italy | 0 | - | 4.55 | 32,138 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,619 |
| Countries in the Byzantine Empire | 0 | - | 4.95 | 72,431 |
| Byzantine History | 0 | - | 4.91 | 29,013 |
| Byzantine Emperors | 0 | - | 4.93 | 14,574 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,810 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,413 |
| Real Madrid 2010s Starting XI | 0 | - | 4.90 | 68,756 |
| Invasions of Great Britain | 0 | - | 4.51 | 60,081 |
| Biggest British Empire Countries | 0 | - | 4.74 | 100,462 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,454 |
| Countries the UK Declared War On | 0 | - | 4.55 | 123,209 |
| Geography of the British Empire | 0 | - | 4.48 | 39,840 |
| Top 100 UK Baby Girls' Names in 1850 | 0 | - | 4.32 | 62,554 |
| Medieval English History | 0 | - | 4.53 | 43,643 |
| Prime Ministers of Israel | 0 | - | 3.97 | 18,061 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.69 | 55,644 |
| Colonies of Africa with a Map | 0 | - | 4.79 | 54,739 |
| Communist Countries in History | 0 | - | 4.63 | 497,996 |
| Political Movements by Country | 0 | - | 4.46 | 72,752 |
| Name a Valid Answer - British History | 0 | - | 4.57 | 15,234 |
| History of South Africa | 0 | - | 4.60 | 17,757 |
| Oceania Map Quiz | 0 | - | 4.98 | 658,899 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.96 | 51,411 |
| Australian States and Territories | 0 | - | 4.96 | 142,796 |
| Australian Capitals | 0 | - | 4.92 | 62,826 |
| Australian Immigration by Country | 0 | - | 4.81 | 77,485 |
| Australia Map Quiz | 0 | - | 4.95 | 346,059 |
| Australia True or False | 0 | - | 4.87 | 57,128 |
| Flags of North and South America | 0 | - | 4.99 | 376,637 |
| 10 Biggest American Countries by Area | 0 | - | 4.95 | 112,932 |
| Top 10 Most Populous American Countries | 0 | - | 4.96 | 144,748 |
| Latin American Countries Map Quiz | 0 | - | 4.98 | 130,575 |
| History of Mexico | 0 | - | 4.52 | 15,360 |
| South America Map Quiz | 0 | - | 5.00 | 1,556,105 |
| Uruguay Country Quiz | 0 | - | 4.84 | 31,742 |
| Central America and Caribbean Map Quiz | 0 | - | 4.90 | 904,824 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,030,655 |
| North America Map Quiz | 0 | - | 4.98 | 251,832 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,958 |
| United States Map Quiz | 0 | - | 4.98 | 4,170,509 |
| Names of Generations | 0 | - | 4.09 | 45,485 |
| U.S. States by Governor | 0 | - | 4.43 | 18,111 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,591 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,764 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 42,466 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,772 |
| Red State or Blue State Trait? | 0 | - | 4.42 | 55,667 |
| U.S. Presidents by State | 0 | - | 4.34 | 68,837 |
| The George Washington Presidency | 0 | - | 4.03 | 14,605 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,777 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,749 |
| The John Adams Presidency | 0 | - | 4.12 | 8,787 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,983 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,774 |
| George Bush... or George Bush | 0 | - | 3.98 | 8,234 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,374 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,754 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,923 |
| The John F. Kennedy Presidency | 0 | - | 4.47 | 43,918 |
| American Founding Fathers | 0 | - | 4.42 | 23,273 |
| The American Revolution | 0 | - | 4.52 | 54,349 |
| American History Quotes #1 | 0 | - | 4.37 | 96,188 |
| People on Money - United States | 0 | - | 4.31 | 63,430 |
| American History Quotes #2 | 0 | - | 4.38 | 41,501 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,581 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,210 |
| Events in U.S. History | 0 | - | 4.41 | 28,816 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,190 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,775 |
| U.S. History for Dummies | 0 | - | 4.47 | 83,390 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,329 |
| The American Civil War | 0 | - | 4.62 | 52,620 |
| US States Quiz | 0 | - | 5.00 | 16,986,245 |
