| Countries of the Soviet Union | 0 | - | 4.98 | 186,096 |
| Soviet Union Country Quiz | 0 | - | 4.91 | 75,273 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,223,396 |
| Prime Ministers of the UK | 0 | - | 4.95 | 386,864 |
| U.S. Presidents by Picture | 0 | - | 4.85 | 398,469 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 356,917 |
| Countries of the Popes | 0 | - | 4.84 | 113,221 |
| U.S. Vice Presidents | 0 | - | 4.42 | 121,844 |
| U.S. Presidential Trivia #1 | 0 | - | 4.52 | 98,579 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.57 | 83,143 |
| U.S. Presidential Trivia #2 | 0 | - | 4.51 | 45,341 |
| Assassinated U.S. Presidents | 0 | - | 4.55 | 80,947 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 33,795 |
| Name a Valid U.S. President #1 | 0 | - | 4.93 | 170,037 |
| Play-Doh Presidents | 0 | - | 5.00 | 76,088 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.41 | 22,659 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.32 | 40,199 |
| Country by Photo of its Leader | 0 | - | 4.78 | 116,683 |
| Biggest Trading Partners – United Kingdom | 0 | - | 4.90 | 63,602 |
| Governors Who Ran For President | 0 | - | 4.47 | 19,007 |
| U.S. Presidents by Event | 0 | - | 4.58 | 29,425 |
| First Ladies of the United States | 0 | - | 4.27 | 80,692 |
| Presidential Middle Names | 0 | - | 4.37 | 56,518 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 24,986 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 66,208 |
| Random U.S. Vice President to President | 0 | - | 4.55 | 28,345 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.63 | 14,152 |
| Add a Letter - Make a U.S. President | 0 | - | 4.66 | 22,243 |
| Neutral European Countries of WWII | 0 | - | 4.92 | 149,796 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 404,337 |
| Two Letter Roman Numerals | 0 | - | 4.98 | 49,657 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 99,291 |
| U.S. Presidents Who Died in Office | 0 | - | 4.76 | 31,524 |
| Countries of Europe After World War II | 0 | - | 4.99 | 173,131 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 141,590 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 78,185 |
| Name the Popes Quiz | 0 | - | 4.46 | 124,561 |
| Prime Ministers of Australia | 0 | - | 4.48 | 28,466 |
| U.S. Citizenship Test Questions | 0 | - | 4.86 | 224,187 |
| US Presidents - 1 Minute Sprint | 0 | - | 4.43 | 282,598 |
| U.S. President Scramble | 0 | - | 4.42 | 107,829 |
| Name a Valid U.S. President #2 | 0 | - | 4.52 | 62,273 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 135,683 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 64,421 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.94 | 51,022 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.97 | 60,206 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 47,454 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 128,974 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.64 | 21,136 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 102,264 |
| English Monarchs Quiz | 0 | - | 4.91 | 454,053 |
| Vatican City Country Quiz | 0 | - | 4.50 | 40,003 |
| Asian Countries with the Most Christians | 0 | - | 4.86 | 86,067 |
| Paramount Leaders of China | 0 | - | 4.31 | 10,048 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 95,184 |
| African Countries with the Most Christians | 0 | - | 4.92 | 68,381 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 68,117 |
| U.S. Presidential Running Mates | 0 | - | 4.39 | 26,146 |
| The George Washington Presidency | 0 | - | 4.02 | 13,726 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 12,945 |
| The John Adams Presidency | 0 | - | 4.10 | 8,046 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.34 | 10,762 |
| The Theodore Roosevelt Presidency | 0 | - | 4.33 | 7,186 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.32 | 16,963 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.32 | 20,656 |
| U.S. Vice Presidential Trivia | 0 | - | 4.31 | 11,623 |
| Deadliest U.S. Wars | 0 | - | 4.83 | 159,959 |
| Canadian Prime Ministers Quiz | 0 | - | 4.65 | 50,589 |
| Every European Country Shape | 0 | - | 4.95 | 173,594 |
| States of the German Confederation in 1848 | 0 | - | 4.85 | 27,092 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 591,706 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.82 | 10,324 |
| Biggest Trading Partners - Spain | 0 | - | 4.90 | 50,825 |
| James Bond Countries Visited Map | 0 | - | 4.99 | 55,969 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 224,149 |
| Most-Visited Countries by Popes | 0 | - | 4.65 | 77,517 |
| Pope Facts | 0 | - | 4.41 | 28,432 |
| Prime Ministers of Israel | 0 | - | 4.10 | 16,363 |
| Biggest Trading Partners - China | 0 | - | 4.96 | 70,912 |
| The Dictator Files: Chairman Mao | 0 | - | 4.32 | 18,697 |
| Biggest Trading Partners – Australia | 0 | - | 4.88 | 48,689 |
| U.S. Presidential Quotes | 0 | - | 4.36 | 42,921 |
| People in Pictures with Ronald Reagan | 0 | - | 4.36 | 37,953 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.47 | 21,188 |
| People in Pictures with Barack Obama | 0 | - | 4.11 | 45,414 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 72,929 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.72 | 54,411 |
| U.S. States or European Countries by Population | 0 | - | 4.98 | 117,323 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.42 | 24,263 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 63,774 |
| Olympian Gods Quiz | 0 | - | 4.96 | 460,945 |
| Name that Greek Letter | 0 | - | 4.94 | 298,448 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.80 | 87,256 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 104,731 |
| Ancient Roman Trivia #1 | 0 | - | 4.84 | 72,394 |
| Roman Emperors | 0 | - | 4.95 | 97,660 |
| National Founders | 0 | - | 4.39 | 80,189 |
| Flags of WW1 | 0 | - | 4.70 | 33,067 |
| Geography of the Dutch Empire | 0 | - | 4.70 | 32,695 |
| Countries of the Spanish Empire | 0 | - | 4.51 | 75,187 |
| Invasions of Great Britain | 0 | - | 4.49 | 56,070 |
| Top 100 UK Baby Girls' Names in 1850 | 0 | - | 4.32 | 54,883 |
| People in Pictures with Queen Elizabeth II | 0 | - | 4.35 | 25,963 |
| Countries "Ruled" by King Charles III | 0 | - | 4.78 | 81,002 |
| 10 Plagues of Egypt | 0 | - | 4.41 | 44,577 |
| Colonies of Africa with a Map | 0 | - | 4.79 | 49,086 |
| All U.S. Supreme Court Justices | 0 | - | 4.49 | 27,456 |
| U.S. Bill of Rights | 0 | - | 4.53 | 31,212 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.73 | 19,358 |
| U.S. Presidents True or False | 0 | - | 3.94 | 14,695 |
| Random U.S. Presidents by Picture | 0 | - | 4.37 | 60,848 |
| The Kennedy Family | 0 | - | 3.84 | 13,396 |
| The American Revolution | 0 | - | 4.55 | 52,045 |
| Category Elimination - U.S. States #1 | 0 | - | 4.90 | 197,500 |
| Random European Countries on a Map | 0 | - | 4.98 | 262,789 |
| Countries of the German Empire | 0 | - | 4.51 | 34,234 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.91 | 100,566 |
| Ancient Greek Words | 0 | - | 4.91 | 99,468 |
| Communist Countries in History | 0 | - | 4.65 | 460,899 |
| Byzantine History | 0 | - | 4.87 | 26,572 |
| Count in Roman Numerals - 30 Second Sprint | 0 | - | 4.27 | 73,647 |
| The Vikings! | 0 | - | 4.45 | 27,302 |
| The Portuguese Empire | 0 | - | 4.54 | 11,410 |
| Arthurian Legend | 0 | - | 4.35 | 24,373 |
| Biggest British Empire Countries | 0 | - | 4.69 | 80,561 |
| Tolkien's Middle Earth Map Quiz | 0 | - | 4.90 | 31,543 |
| Wives of King Henry VIII | 0 | - | 4.55 | 51,598 |
| Countries the UK Declared War On | 0 | - | 4.58 | 113,686 |
| Geography of the British Empire | 0 | - | 4.51 | 37,403 |
| Medieval English History | 0 | - | 4.52 | 41,235 |
| Asian Countries by First 2 Letters | 0 | - | 4.92 | 258,418 |
| History of Iran Quiz | 0 | - | 4.63 | 15,285 |
| Vietnam War Countries | 0 | - | 4.81 | 87,423 |
| History of China | 0 | - | 4.38 | 51,271 |
| History of India | 0 | - | 4.52 | 19,518 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.58 | 52,256 |
| African Countries by First 2 Letters | 0 | - | 4.95 | 248,168 |
| History of South Africa | 0 | - | 4.59 | 16,718 |
| U.S. Federal Agency Acronyms | 0 | - | 4.51 | 76,662 |
| Win the U.S. Presidential Election | 0 | - | 4.80 | 522,582 |
| The George W. Bush Presidency | 0 | - | 4.06 | 31,051 |
| The Bill Clinton Presidency | 0 | - | 4.18 | 30,316 |
| The George H. W. Bush Presidency | 0 | - | 4.35 | 20,655 |
| The Ronald Reagan Presidency | 0 | - | 4.25 | 23,755 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.20 | 30,661 |
| The Barack Obama Presidency | 0 | - | 4.17 | 23,786 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 123,278 |
| Biggest European Cities by Letter | 0 | - | 4.66 | 120,263 |
| Europe Map Quiz | 0 | - | 5.00 | 4,349,619 |
| European Countries by First 2 Letters | 0 | - | 4.96 | 491,505 |
| European Secessionist Movements on a Map | 0 | - | 4.51 | 31,877 |
| Random Sequential European Countries on a Map | 0 | - | 4.99 | 204,449 |
| Europe Map with Random Merged Countries | 0 | - | 4.96 | 271,106 |
| Save Europeans by Guessing Countries | 0 | - | 4.87 | 173,107 |
| History of Russia Quiz | 0 | - | 4.48 | 30,114 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 88,346 |
| History of Austria | 0 | - | 4.69 | 16,564 |
| Geography of the French Empire | 0 | - | 4.49 | 25,622 |
| The French Revolution | 0 | - | 4.45 | 22,134 |
| History of France Quiz | 0 | - | 4.55 | 40,046 |
| Ancient Greek Trivia | 0 | - | 4.55 | 63,860 |
| Figures from Greek Mythology | 0 | - | 4.92 | 170,887 |
| History of Ireland Quiz | 0 | - | 4.44 | 19,170 |
| History of Italy | 0 | - | 4.49 | 30,028 |
| Countries Italy Declared War On | 0 | - | 4.76 | 40,422 |
| Political Movements by Country | 0 | - | 4.47 | 69,077 |
| History of The Netherlands | 0 | - | 4.43 | 15,939 |
| History of Spain Quiz | 0 | - | 4.33 | 19,733 |
| Geography of the Spanish Empire | 0 | - | 4.48 | 35,473 |
| Countries that Beat Switzerland | 0 | - | 4.87 | 38,306 |
| UK Cities Map Quiz | 0 | - | 4.95 | 437,822 |
| Counties of England | 0 | - | 4.97 | 703,596 |
| Shakespeare's Plays Quiz | 0 | - | 4.41 | 353,326 |
| Do You Even Know Anything About Shakespeare? | 0 | - | 4.58 | 32,367 |
| Lord of the Rings Decoder | 0 | - | 4.58 | 39,510 |
| Anglo-Saxon Kingdoms of England | 0 | - | 4.60 | 24,869 |
| British History A-Z | 0 | - | 4.47 | 40,077 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.76 | 19,142 |
| Houses of British Monarchs | 0 | - | 4.51 | 52,844 |
| English First Names of the Middle Ages | 0 | - | 4.41 | 45,963 |
| British History Multiple Choice #1 | 0 | - | 4.47 | 52,054 |
| British History Quiz for Dummies | 0 | - | 4.54 | 62,436 |
| History of Scotland | 0 | - | 4.49 | 19,823 |
| Countries Most-Visited By Queen Elizabeth II | 0 | - | 4.40 | 48,419 |
| Champions League Winners | 0 | - | 4.91 | 890,608 |
| Flags of Asia Quiz | 0 | - | 4.99 | 534,316 |
| East Asia Cities Map Quiz | 0 | - | 4.97 | 101,610 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,355,393 |
| Asia Map Quiz | 0 | - | 4.99 | 799,837 |
| 10 Biggest Asian Countries by Area | 0 | - | 4.97 | 142,560 |
| 10 Southernmost Countries in Asia | 0 | - | 4.97 | 90,132 |
| 10 Easternmost Countries in Asia | 0 | - | 4.98 | 98,108 |
| Countries of Asia with Two or More Words | 0 | - | 4.95 | 112,706 |
| Asian Countries Ending in "IA" | 0 | - | 4.94 | 95,163 |
| Top Asian Languages on a Map | 0 | - | 4.94 | 61,967 |
| South and Central Asia Map Quiz | 0 | - | 4.93 | 81,734 |
| Countries of Asia with an Empty Map | 0 | - | 4.98 | 213,044 |
| All First-Level Subdivisions of Asia on a Map | 0 | - | 4.95 | 37,679 |
| Middle East Map Quiz | 0 | - | 4.99 | 1,293,069 |
| Countries that Have Controlled Mesopotamia | 0 | - | 4.17 | 14,599 |
