| Prime Ministers of the UK | 0 | - | 4.95 | 442,015 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,723,318 |
| Name a Valid U.S. President #1 | 0 | - | 4.90 | 193,653 |
| Ultimate Harry Potter Name Game | 0 | - | 4.94 | 494,600 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 306,119 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 439,537 |
| Prime Ministers of Australia | 0 | - | 4.51 | 32,178 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 70,542 |
| Canadian Prime Ministers | 0 | - | 4.64 | 57,883 |
| Soviet Leaders 1917–1991 | 0 | - | 4.44 | 95,511 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,562 |
| James Bond Countries Visited Map | 0 | - | 4.99 | 64,703 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 238,195 |
| Name the Popes Quiz | 0 | - | 4.47 | 138,853 |
| Countries of the Popes | 0 | - | 4.79 | 128,674 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 428,307 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 383,442 |
| Europe Map with Random Merged Countries | 0 | - | 4.97 | 320,347 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 89,665 |
| Basic Harry Potter Quiz | 0 | - | 4.56 | 379,582 |
| Tolkien's Middle Earth Map Quiz | 0 | - | 4.92 | 38,170 |
| Countries Most-Visited By Queen Elizabeth II | 0 | - | 4.42 | 51,953 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 109,451 |
| U.S. Presidents by Event | 0 | - | 4.58 | 35,263 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.62 | 94,576 |
| Presidential Middle Names | 0 | - | 4.41 | 60,687 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,653 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,877 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 35,182 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,617 |
| U.S. President Scramble | 0 | - | 4.40 | 117,425 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,830 |
| Top 10 Oldest African Countries | 0 | - | 4.88 | 28,199 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,405 |
| Figures from Greek Mythology | 0 | - | 4.91 | 188,678 |
| Harry Potter: Voldemort's Horcruxes | 0 | - | 4.45 | 113,043 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,747 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 73,077 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,269 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 85,161 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,667 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,765 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,505 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 145,552 |
| Byzantine History | 0 | - | 4.91 | 29,011 |
| Byzantine Emperors | 0 | - | 4.93 | 14,562 |
| Biggest British Empire Countries | 0 | - | 4.74 | 100,453 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,650 |
| Groups of Things - Harry Potter | 0 | - | 4.78 | 282,635 |
| The Dictator Files: Saddam Hussein | 0 | - | 4.48 | 15,922 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,445 |
| Country by Photo of its Leader | 0 | - | 4.70 | 124,580 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,922 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,356 |
| U.S. Presidential Running Mates | 0 | - | 4.41 | 28,757 |
| First Ladies of the United States | 0 | - | 4.28 | 85,923 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.42 | 24,059 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,306 |
| U.S. Presidents in Order by First Letter | 0 | - | 4.32 | 77,451 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,353 |
| Add a Letter - Make a U.S. President | 0 | - | 4.58 | 24,088 |
| Win the 1828 U.S. Presidential Election | 0 | - | 4.31 | 57,933 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 48,070 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,699 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,935 |
| Every European Country Shape | 0 | - | 4.96 | 202,834 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 96,972 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 134,092 |
| Random European Capital to Country | 0 | - | 4.98 | 192,052 |
| Random European Country to Capital | 0 | - | 4.93 | 165,821 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,923 |
| The Trojan War | 0 | - | 4.83 | 39,962 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 651,494 |
| Name that Greek Letter | 0 | - | 4.93 | 324,866 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,851 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,554 |
| Roman Emperors | 0 | - | 4.95 | 121,091 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 61,607 |
| Countries of Iberia in History with a Map | 0 | - | 4.88 | 42,336 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,822 |
| Monty Python Quotes | 0 | - | 4.89 | 42,597 |
| Name the Harry Potter Books | 0 | - | 4.31 | 280,600 |
| Harry Potter Spells | 0 | - | 4.33 | 140,024 |
| Harry Potter Places | 0 | - | 4.35 | 108,687 |
| Harry Potter - Order of the Phoenix Members | 0 | - | 4.06 | 43,198 |
| Harry Potter Creatures | 0 | - | 4.30 | 64,401 |
| Word Scramble - Harry Potter Characters | 0 | - | 4.20 | 61,096 |
| Harry Potter Characters by Screen Time | 0 | - | 4.28 | 148,781 |
| Name the English Monarchs | 0 | - | 4.91 | 506,035 |
| Top 100 UK Baby Girls' Names in 1850 | 0 | - | 4.32 | 62,538 |
| Pope Facts | 0 | - | 4.39 | 31,374 |
| Paramount Leaders of China | 0 | - | 4.36 | 11,126 |
| The Dictator Files: Chairman Mao | 0 | - | 4.28 | 20,744 |
| All Modern-Day Countries Ever Controlled by Chinese People | 0 | - | 4.81 | 55,149 |
| National Founders | 0 | - | 4.40 | 83,957 |
| Flag Coloring Book Puzzle #1 | 0 | - | 4.96 | 172,628 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,775 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,746 |
| The John Adams Presidency | 0 | - | 4.12 | 8,785 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,772 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,921 |
| U.S. Presidents by Picture - Multiple Choice | 0 | - | 4.50 | 29,021 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,731 |
| Random European Flag to Country | 0 | - | 4.90 | 184,070 |
| Olympian Gods Quiz | 0 | - | 4.96 | 503,487 |
| Ancient Greek Words | 0 | - | 4.93 | 112,383 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 127,382 |
| Ancient Rome - True or False? | 0 | - | 4.85 | 43,279 |
| Biggest Trading Partners – United Kingdom | 0 | - | 4.93 | 80,910 |
| Random African Flag to Country | 0 | - | 4.88 | 75,560 |
| Random Sequential Countries on the World Map | 0 | - | 5.00 | 525,820 |
| Random American Countries on a Map | 0 | - | 4.96 | 100,145 |
| The Dictator Files: Fidel Castro | 0 | - | 4.19 | 12,385 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,139 |
| U.S. Senators by State | 0 | - | 4.44 | 40,096 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,859 |
| The George Washington Presidency | 0 | - | 4.03 | 14,603 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,980 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,373 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,753 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 129,599 |
| Europe Map Quiz | 0 | - | 5.00 | 4,785,126 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 532,251 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 35,168 |
| Random European Countries on a Map | 0 | - | 4.97 | 284,950 |
| Random Sequential European Countries on a Map | 0 | - | 4.99 | 217,970 |
| History of Russia Quiz | 0 | - | 4.47 | 31,998 |
| Countries of the Soviet Union | 0 | - | 4.98 | 195,495 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 94,399 |
| Soviet Union Country Quiz | 0 | - | 4.91 | 81,114 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.37 | 48,632 |
| Countries of the German Empire | 0 | - | 4.51 | 38,157 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 75,204 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,825 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 20,947 |
| Roman to Greek God | 0 | - | 4.52 | 123,303 |
| Word Chain - Greek and Roman Mythology | 0 | - | 4.50 | 56,957 |
| History of Italy | 0 | - | 4.55 | 32,137 |
| Biggest Cities Once in the Roman Empire | 0 | - | 4.81 | 76,100 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,484 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,809 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,412 |
| Invasions of Great Britain | 0 | - | 4.51 | 60,074 |
| Shakespeare's Plays Quiz | 0 | - | 4.37 | 389,896 |
| Shakespeare Quotes | 0 | - | 4.43 | 71,554 |
| Harry Potter Characters by Death | 0 | - | 3.96 | 126,583 |
| Harry Potter A-Z | 0 | - | 4.43 | 228,125 |
| Harry Potter - Name The Hogwarts Classes | 0 | - | 4.25 | 27,220 |
| Harry Potter Patronus Charms | 0 | - | 4.27 | 31,262 |
| Lord of the Rings Characters by Screen Time | 0 | - | 4.55 | 77,628 |
| Countries "Ruled" by King Charles III | 0 | - | 4.78 | 82,849 |
| 10 Plagues of Egypt | 0 | - | 4.41 | 53,905 |
| Colonies of Africa with a Map | 0 | - | 4.79 | 54,730 |
| Africa Map with Random Merged Countries | 0 | - | 4.94 | 74,325 |
| Communist Countries in History | 0 | - | 4.63 | 497,933 |
| Random Sequential Countries on the World Map - Hard Version | 0 | - | 5.00 | 76,417 |
| George Washington... or George W. Bush? | 0 | - | 4.16 | 12,297 |
| History of South Africa | 0 | - | 4.60 | 17,756 |
| Oceania Map Quiz | 0 | - | 4.98 | 658,789 |
| Australian Capitals | 0 | - | 4.92 | 62,823 |
| History of Mexico | 0 | - | 4.52 | 15,360 |
| United States Map Quiz | 0 | - | 4.98 | 4,170,205 |
| American Junk Food Brands #1 | 0 | - | 3.84 | 61,026 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 80,132 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,591 |
| Red State or Blue State Trait? | 0 | - | 4.42 | 55,661 |
| Win the U.S. Presidential Election | 0 | - | 4.78 | 635,130 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,601 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,271 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,906 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,331 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,797 |
| U.S. History for Dummies | 0 | - | 4.47 | 83,383 |
| U.S. Map with Random Merged States | 0 | - | 4.94 | 303,790 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,672 |
| Official European Union Languages | 0 | - | 4.97 | 239,667 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,565 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 430,619 |
| Save Europeans by Guessing Countries | 0 | - | 4.86 | 216,426 |
| History of Austria | 0 | - | 4.70 | 17,968 |
| Geography of the French Empire | 0 | - | 4.45 | 27,208 |
| The French Revolution | 0 | - | 4.47 | 24,135 |
| History of France | 0 | - | 4.61 | 57,561 |
| French History Multiple Choice | 0 | - | 4.55 | 33,210 |
| Most Popular Baby Girls Names in Germany | 0 | - | 4.51 | 38,977 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,554 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,211 |
| Geography of Ancient Greece | 0 | - | 4.69 | 32,030 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 74,245 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,823 |
| Things with Names from Classical Mythology | 0 | - | 4.28 | 88,024 |
| Least Irish U.S. States | 0 | - | 4.49 | 18,393 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,615 |
| Ancient Roman Trivia #2 | 0 | - | 4.61 | 44,246 |
| Geography of the Roman Empire | 0 | - | 4.55 | 52,192 |
| Roman Names for Places | 0 | - | 4.62 | 58,670 |
| History of The Netherlands | 0 | - | 4.46 | 17,543 |
| The Vikings! | 0 | - | 4.46 | 28,400 |
| The Portuguese Empire | 0 | - | 4.58 | 12,099 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,302 |
