| Prime Ministers of the UK | 0 | - | 4.95 | 377,469 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 396,157 |
| Countries Most-Visited By Queen Elizabeth II | 0 | - | 4.38 | 47,359 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,132,341 |
| Countries "Ruled" by King Charles III | 0 | - | 4.79 | 80,531 |
| Name the Popes Quiz | 0 | - | 4.42 | 99,721 |
| Countries of the Popes | 0 | - | 4.77 | 78,988 |
| Soviet Leaders 1917–1991 | 0 | - | 4.42 | 86,710 |
| Figures from Greek Mythology | 0 | - | 4.92 | 168,355 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.63 | 15,413 |
| James Bond Countries Visited Map | 0 | - | 4.99 | 53,904 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 220,835 |
| Pope Facts | 0 | - | 4.44 | 17,461 |
| Prime Ministers of Australia | 0 | - | 4.47 | 27,412 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.96 | 124,702 |
| Country by Photo of its Leader | 0 | - | 4.79 | 114,302 |
| Biggest Trading Partners - UK | 0 | - | 4.86 | 56,303 |
| U.S. Presidents by Picture | 0 | - | 4.85 | 391,646 |
| Canadian Prime Ministers Quiz | 0 | - | 4.56 | 45,697 |
| Two Letter Roman Numerals | 0 | - | 4.98 | 47,994 |
| Shakespeare's Plays Quiz | 0 | - | 4.41 | 345,593 |
| People in Pictures with Queen Elizabeth II | 0 | - | 4.33 | 25,006 |
| Paramount Leaders of China | 0 | - | 4.31 | 9,849 |
| U.S. Vice Presidents | 0 | - | 4.42 | 117,976 |
| U.S. Presidential Trivia #1 | 0 | - | 4.51 | 96,076 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.56 | 80,435 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 350,704 |
| U.S. Presidential Trivia #2 | 0 | - | 4.51 | 39,203 |
| Assassinated U.S. Presidents | 0 | - | 4.54 | 79,392 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 33,397 |
| Name a Valid U.S. President #1 | 0 | - | 4.93 | 164,725 |
| Play-Doh Presidents | 0 | - | 5.00 | 73,787 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 67,562 |
| Countries of the Soviet Union | 0 | - | 4.98 | 183,431 |
| Countries in the Byzantine Empire | 0 | - | 4.95 | 66,163 |
| Biggest British Empire Countries | 0 | - | 4.66 | 78,402 |
| Prime Ministers of Israel | 0 | - | 4.10 | 16,007 |
| The Dictator Files: Chairman Mao | 0 | - | 4.30 | 18,034 |
| U.S. Citizenship Test Questions | 0 | - | 4.86 | 220,472 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 132,413 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 61,593 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.93 | 47,998 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.97 | 57,690 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 73,888 |
| Roman to Greek God | 0 | - | 4.52 | 112,746 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 98,240 |
| English Monarchs Quiz | 0 | - | 4.91 | 442,754 |
| Top 100 UK Baby Girls' Names in 1850 | 0 | - | 4.32 | 53,003 |
| Asian Countries with the Most Christians | 0 | - | 4.86 | 83,531 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 92,327 |
| African Countries with the Most Christians | 0 | - | 4.92 | 66,619 |
| U.S. Cabinet Departments | 0 | - | 4.85 | 67,233 |
| Governors Who Ran For President | 0 | - | 4.46 | 18,829 |
| U.S. Presidents by Event | 0 | - | 4.57 | 28,882 |
| First Ladies of the United States | 0 | - | 4.27 | 79,416 |
| Presidential Middle Names | 0 | - | 4.36 | 55,866 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.41 | 22,418 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 24,749 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.31 | 62,517 |
| U.S. Presidents Who Died in Office | 0 | - | 4.72 | 31,017 |
| Random U.S. Vice President to President | 0 | - | 4.57 | 23,017 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.62 | 13,717 |
| Add a Letter - Make a U.S. President | 0 | - | 4.66 | 21,753 |
| Deadliest U.S. Wars | 0 | - | 4.82 | 156,779 |
| Every European Country Shape | 0 | - | 4.95 | 169,968 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.33 | 39,209 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.42 | 23,528 |
| States of the German Confederation in 1848 | 0 | - | 4.84 | 26,052 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 579,414 |
| National Founders | 0 | - | 4.38 | 78,980 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.82 | 9,602 |
| Ancient Roman Trivia #1 | 0 | - | 4.84 | 71,255 |
| Roman Emperors | 0 | - | 4.95 | 94,669 |
| Biggest Trading Partners - Spain | 0 | - | 4.92 | 49,960 |
| Lord of the Rings Characters | 0 | - | 4.54 | 104,957 |
| 10 Plagues of Egypt | 0 | - | 4.41 | 44,379 |
| Biggest Trading Partners - China | 0 | - | 4.96 | 69,411 |
| Biggest Trading Partners - Australia | 0 | - | 4.88 | 42,449 |
| U.S. Bill of Rights | 0 | - | 4.56 | 30,964 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 25,445 |
| US Presidents - 1 Minute Sprint | 0 | - | 4.44 | 275,725 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 12,798 |
| The John Adams Presidency | 0 | - | 4.10 | 7,913 |
| The Theodore Roosevelt Presidency | 0 | - | 4.30 | 7,093 |
| Name a Valid U.S. President #2 | 0 | - | 4.52 | 51,506 |
| U.S. Vice Presidential Trivia | 0 | - | 4.29 | 11,223 |
| The American Revolution | 0 | - | 4.55 | 51,454 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 70,263 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.71 | 53,425 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 129,997 |
| U.S. States or European Countries by Population | 0 | - | 4.98 | 114,822 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 61,636 |
| Olympian Gods Quiz | 0 | - | 4.96 | 454,935 |
| The Trojan War | 0 | - | 4.81 | 35,623 |
| Name that Greek Letter | 0 | - | 4.94 | 294,033 |
| Ancient Greek Words | 0 | - | 4.90 | 96,180 |
| Things with Names from Classical Mythology | 0 | - | 4.28 | 81,622 |
| Count in Roman Numerals - 30 Second Sprint | 0 | - | 4.25 | 70,494 |
| Geography of the Dutch Empire | 0 | - | 4.70 | 31,935 |
| Countries of the Spanish Empire | 0 | - | 4.51 | 64,926 |
| Real Madrid 2010's Starting XI | 0 | - | 4.85 | 49,269 |
| Arthurian Legend | 0 | - | 4.34 | 24,218 |
| Invasions of Great Britain | 0 | - | 4.48 | 55,132 |
| Groups of Things - Harry Potter | 0 | - | 4.85 | 258,723 |
| Tolkien's Middle Earth Map Quiz | 0 | - | 4.90 | 30,466 |
| Vatican City Country Quiz | 0 | - | 4.48 | 38,437 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 97,686 |
| Colonies of Africa with a Map | 0 | - | 4.80 | 47,855 |
| All U.S. Supreme Court Justices | 0 | - | 4.49 | 27,199 |
| The George Washington Presidency | 0 | - | 4.02 | 13,566 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.32 | 10,653 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.31 | 16,713 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.32 | 20,410 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 121,943 |
| Category Elimination - U.S. States #1 | 0 | - | 4.91 | 192,963 |
| Random European Countries on a Map | 0 | - | 4.98 | 257,967 |
| Random Sequential European Countries on a Map | 0 | - | 4.99 | 201,182 |
| Europe Map with Random Merged Countries | 0 | - | 4.96 | 263,091 |
| Countries of Europe After World War II | 0 | - | 4.98 | 169,071 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 137,807 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 86,735 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.91 | 99,194 |
| Communist Countries in History | 0 | - | 4.65 | 451,238 |
| Ancient Roman Trivia #2 | 0 | - | 4.55 | 35,185 |
| Geography of the Roman Empire | 0 | - | 4.58 | 47,987 |
| The Life of Julius Caesar | 0 | - | 4.46 | 31,967 |
| Roman Names for Places | 0 | - | 4.66 | 41,044 |
| Byzantine History | 0 | - | 4.87 | 26,069 |
| History of The Netherlands | 0 | - | 4.42 | 15,631 |
| The Vikings! | 0 | - | 4.44 | 27,010 |
| The Portuguese Empire | 0 | - | 4.54 | 11,286 |
| Geography of the Spanish Empire | 0 | - | 4.47 | 34,822 |
| Biggest Cities in the Commonwealth of Nations | 0 | - | 4.59 | 62,707 |
| Biggest Cities in the UK | 0 | - | 4.45 | 92,509 |
| Shakespeare Quotes Quiz | 0 | - | 4.40 | 61,999 |
| Do You Even Know Anything About Shakespeare? | 0 | - | 4.57 | 31,676 |
| Wives of King Henry VIII | 0 | - | 4.53 | 44,472 |
| Countries the UK Declared War On | 0 | - | 4.57 | 110,868 |
| Houses of British Monarchs | 0 | - | 4.50 | 51,693 |
| Medieval English History | 0 | - | 4.52 | 40,535 |
| British History Multiple Choice #1 | 0 | - | 4.47 | 51,242 |
| British History Quiz for Dummies | 0 | - | 4.54 | 61,105 |
| Places Where Winston Churchill Said We Would Fight the Nazis | 0 | - | 4.55 | 13,744 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,333,910 |
| Asia Map Quiz | 0 | - | 4.99 | 773,316 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 252,809 |
| Middle East Map Quiz | 0 | - | 4.99 | 1,272,951 |
| History of Iran Quiz | 0 | - | 4.63 | 15,048 |
| Ottoman Empire Quiz | 0 | - | 4.42 | 15,537 |
| Chinese Inventions | 0 | - | 4.26 | 32,507 |
| History of China | 0 | - | 4.39 | 49,885 |
| The Life of Gandhi | 0 | - | 4.42 | 12,535 |
| History of India | 0 | - | 4.52 | 19,080 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.57 | 51,389 |
| Countries of Africa | 0 | - | 5.00 | 2,139,519 |
| Africa Map Quiz | 0 | - | 5.00 | 1,924,430 |
| African Countries by First 2 Letters | 0 | - | 4.95 | 242,917 |
| History of South Africa | 0 | - | 4.59 | 16,466 |
| Oceania Map Quiz | 0 | - | 4.97 | 562,185 |
| Australian Capitals | 0 | - | 4.90 | 52,937 |
| Australia Map Quiz | 0 | - | 4.94 | 317,198 |
| History of Mexico | 0 | - | 4.55 | 13,785 |
| United States Map Quiz | 0 | - | 4.98 | 3,880,037 |
| Arms Exports - United States | 0 | - | 4.64 | 48,537 |
| U.S. Federal Agency Acronyms | 0 | - | 4.51 | 75,614 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.31 | 10,262 |
| Win the U.S. Presidential Election | 0 | - | 4.79 | 498,052 |
| U.S. Presidential Quotes | 0 | - | 4.35 | 42,590 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.75 | 19,211 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 37,279 |
| U.S. President Scramble | 0 | - | 4.39 | 90,120 |
| U.S. Presidents True or False | 0 | - | 3.94 | 14,539 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.46 | 20,685 |
| Random U.S. Presidents by Picture | 0 | - | 4.37 | 58,054 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 44,887 |
| The Kennedy Family | 0 | - | 3.85 | 13,186 |
| American History Quotes #1 | 0 | - | 4.43 | 91,033 |
| U.S. History for Dummies | 0 | - | 4.50 | 64,658 |
| The American Civil War | 0 | - | 4.72 | 48,645 |
| Biggest European Cities by Letter | 0 | - | 4.64 | 118,045 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 333,728 |
| Official European Union Languages | 0 | - | 4.98 | 198,684 |
| European Countries in their Native Language | 0 | - | 4.99 | 142,831 |
| Europe Map Quiz | 0 | - | 5.00 | 4,252,833 |
| European Countries by First 2 Letters | 0 | - | 4.96 | 453,780 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 381,781 |
| European Secessionist Movements on a Map | 0 | - | 4.55 | 31,122 |
| Save Europeans by Guessing Countries | 0 | - | 4.85 | 163,212 |
| History of Russia Quiz | 0 | - | 4.48 | 29,731 |
| History of Austria | 0 | - | 4.68 | 16,273 |
| Geography of the French Empire | 0 | - | 4.49 | 24,992 |
| The French Revolution | 0 | - | 4.44 | 21,796 |
| History of France Quiz | 0 | - | 4.55 | 39,473 |
| Ancient Greek Trivia | 0 | - | 4.56 | 63,094 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.80 | 83,945 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.58 | 54,953 |
| Ancient Greece - Multiple Choice | 0 | - | 4.53 | 38,380 |
| History of Ireland Quiz | 0 | - | 4.43 | 18,774 |
| History of Italy | 0 | - | 4.49 | 29,644 |
| Countries Italy Declared War On | 0 | - | 4.79 | 39,645 |
