| Prime Ministers of the UK | 0 | - | 4.95 | 440,166 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 427,107 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 382,359 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 192,643 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,490 |
| Top 100 Harry Potter Characters by Mention | 0 | - | 4.93 | 395,226 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,709,221 |
| Prime Ministers of Australia | 0 | - | 4.50 | 32,013 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 305,406 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 70,227 |
| Random Sequential U.S. States on a Map | 0 | - | 4.99 | 234,746 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,652 |
| James Bond Countries Visited Map | 0 | - | 4.99 | 64,408 |
| Ultimate Harry Potter Name Game | 0 | - | 4.94 | 493,989 |
| Country by Photo of its Leader | 0 | - | 4.72 | 124,273 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,538 |
| U.S. President Scramble | 0 | - | 4.40 | 117,021 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,227 |
| U.S. Presidents by Picture - Multiple Choice | 0 | - | 4.50 | 28,900 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,952 |
| Random U.S. States on a Map | 0 | - | 4.96 | 627,881 |
| Top 10 Oldest African Countries | 0 | - | 4.88 | 28,066 |
| Random Sequential European Countries on a Map | 0 | - | 4.99 | 217,542 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,207 |
| Harry Potter Last Names | 0 | - | 4.64 | 950,166 |
| Random Sequential Asian Countries on a Map | 0 | - | 4.99 | 119,252 |
| Random Sequential African Countries on a Map | 0 | - | 5.00 | 127,965 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,767 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,944 |
| U.S. Map with Random Merged States | 0 | - | 4.94 | 303,023 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,773 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 83,539 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,128 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,346 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,158 |
| Soviet Leaders 1917–1991 | 0 | - | 4.44 | 95,204 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,019 |
| Harry Potter A-Z | 0 | - | 4.43 | 227,488 |
| Name the English Monarchs | 0 | - | 4.91 | 504,073 |
| Name the Popes Quiz | 0 | - | 4.47 | 138,447 |
| Countries of the Popes | 0 | - | 4.79 | 128,358 |
| The Dictator Files: Saddam Hussein | 0 | - | 4.48 | 15,879 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,111 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,212 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,758 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,185 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,868 |
| The Trojan War | 0 | - | 4.83 | 39,804 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 649,011 |
| Name that Greek Letter | 0 | - | 4.93 | 324,204 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,275 |
| Word Chain - Greek and Roman Mythology | 0 | - | 4.50 | 56,765 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,502 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,660 |
| Roman Emperors | 0 | - | 4.95 | 120,424 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 61,318 |
| Countries of Iberia in History with a Map | 0 | - | 4.88 | 42,072 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,533 |
| Monty Python Quotes | 0 | - | 4.89 | 42,512 |
| Basic Harry Potter Quiz | 0 | - | 4.56 | 379,148 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 237,714 |
| Vatican City Country Quiz | 0 | - | 4.53 | 44,467 |
| Paramount Leaders of China | 0 | - | 4.36 | 11,100 |
| The Dictator Files: Chairman Mao | 0 | - | 4.28 | 20,707 |
| All Modern-Day Countries Ever Controlled by Chinese People | 0 | - | 4.82 | 54,965 |
| National Founders | 0 | - | 4.40 | 83,890 |
| Random American Countries on a Map | 0 | - | 4.96 | 99,789 |
| The Dictator Files: Fidel Castro | 0 | - | 4.19 | 12,353 |
| U.S. Senators by State | 0 | - | 4.44 | 40,004 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 108,944 |
| U.S. Presidents by Event | 0 | - | 4.58 | 34,738 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 94,023 |
| Presidential Middle Names | 0 | - | 4.41 | 60,423 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,460 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,673 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 35,057 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,489 |
| Random U.S. Presidents by Picture | 0 | - | 4.40 | 66,343 |
| U.S. State Flags | 0 | - | 4.88 | 171,381 |
| U.S. States that Start with M - Shape Quiz | 0 | - | 4.94 | 58,239 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,591 |
| Random European Countries on a Map | 0 | - | 4.97 | 284,332 |
| Europe Map with Random Merged Countries | 0 | - | 4.97 | 319,402 |
| Random European Flag to Country | 0 | - | 4.89 | 183,006 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 89,235 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.37 | 48,559 |
| All Modern-Day Countries Ever Controlled by French People | 0 | - | 4.99 | 58,230 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.98 | 74,651 |
| Olympian Gods Quiz | 0 | - | 4.96 | 501,976 |
| Ancient Greek Words | 0 | - | 4.93 | 111,932 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 126,540 |
| Ancient Rome - True or False? | 0 | - | 4.85 | 43,045 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 438,106 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,283 |
| Shakespearean Phrases | 0 | - | 4.57 | 36,784 |
| Harry Potter: Voldemort's Horcruxes | 0 | - | 4.45 | 112,887 |
| Groups of Things - Harry Potter | 0 | - | 4.80 | 282,072 |
| Random Asian Countries on a Map | 0 | - | 4.91 | 170,397 |
| Random African Countries on a Map | 0 | - | 4.99 | 296,883 |
| Random African Flag to Country | 0 | - | 4.88 | 75,235 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,108 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,831 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,515 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,281 |
| First Ladies of the United States | 0 | - | 4.28 | 85,751 |
| The Bill Clinton Presidency | 0 | - | 4.24 | 31,484 |
| The George H. W. Bush Presidency | 0 | - | 4.36 | 21,516 |
| The Ronald Reagan Presidency | 0 | - | 4.26 | 24,846 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,983 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,251 |
| U.S. Presidents in Order by First Letter | 0 | - | 4.32 | 77,282 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,238 |
| Add a Letter - Make a U.S. President | 0 | - | 4.57 | 24,003 |
| The Barack Obama Presidency | 0 | - | 4.13 | 25,426 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,858 |
| Europe Map Quiz | 0 | - | 5.00 | 4,772,030 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 530,683 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 35,058 |
| History of Russia Quiz | 0 | - | 4.47 | 31,957 |
| 25 Biggest Cities of the Soviet Union | 0 | - | 4.94 | 84,653 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 94,165 |
| History of France | 0 | - | 4.59 | 57,290 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 20,844 |
| Figures from Greek Mythology | 0 | - | 4.91 | 187,766 |
| History of Italy | 0 | - | 4.55 | 32,059 |
| Countries in the Byzantine Empire | 0 | - | 4.95 | 72,277 |
| Byzantine History | 0 | - | 4.91 | 28,920 |
| Byzantine Emperors | 0 | - | 4.92 | 14,376 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,723 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,301 |
| Real Madrid 2010s Starting XI | 0 | - | 4.90 | 68,110 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,961 |
| Biggest British Empire Countries | 0 | - | 4.74 | 100,207 |
| Name the Harry Potter Books | 0 | - | 4.31 | 279,852 |
| Harry Potter Spells | 0 | - | 4.33 | 139,833 |
| Harry Potter Places | 0 | - | 4.34 | 108,463 |
| Harry Potter - Order of the Phoenix Members | 0 | - | 4.06 | 43,125 |
| Harry Potter Creatures | 0 | - | 4.30 | 64,221 |
| Word Scramble - Harry Potter Characters | 0 | - | 4.20 | 60,966 |
| Harry Potter Characters by Screen Time | 0 | - | 4.28 | 148,435 |
| Title in the Lyrics #2 - The Beatles | 0 | - | 4.57 | 94,012 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,406 |
| Countries the UK Declared War On | 0 | - | 4.55 | 122,685 |
| Geography of the British Empire | 0 | - | 4.48 | 39,737 |
| Top 100 UK Baby Girls' Names in 1850 | 0 | - | 4.35 | 62,281 |
| Most-Visited Countries by Popes | 0 | - | 4.56 | 83,883 |
| Pope Facts | 0 | - | 4.39 | 31,299 |
| Prime Ministers of Israel | 0 | - | 3.97 | 17,985 |
| Colonies of Africa with a Map | 0 | - | 4.79 | 54,557 |
| Communist Countries in History | 0 | - | 4.63 | 496,610 |
| Political Movements by Country | 0 | - | 4.46 | 72,626 |
| History of South Africa | 0 | - | 4.60 | 17,722 |
| Oceania Map Quiz | 0 | - | 4.98 | 653,900 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 50,960 |
| Australian Capitals | 0 | - | 4.92 | 62,759 |
| Australia Map Quiz | 0 | - | 4.95 | 345,237 |
| Flags of North and South America | 0 | - | 4.99 | 374,442 |
| History of Mexico | 0 | - | 4.58 | 15,336 |
| South America Map Quiz | 0 | - | 5.00 | 1,551,952 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,026,091 |
| United States Map Quiz | 0 | - | 4.98 | 4,163,843 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 80,040 |
| U.S. States by Governor | 0 | - | 4.43 | 18,079 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,557 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,717 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,712 |
| Red State or Blue State Trait? | 0 | - | 4.42 | 55,475 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 28,678 |
| The George Washington Presidency | 0 | - | 4.03 | 14,569 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,751 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,673 |
| The John Adams Presidency | 0 | - | 4.12 | 8,762 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,949 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,749 |
| George Bush... or George Bush | 0 | - | 3.98 | 8,213 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,335 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,708 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,871 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,651 |
| Events in U.S. History | 0 | - | 4.41 | 28,718 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,134 |
| U.S. History for Dummies | 0 | - | 4.47 | 83,204 |
| The American Civil War | 0 | - | 4.62 | 52,505 |
| U.S. State Quarters Picture Quiz #1 | 0 | - | 4.45 | 52,833 |
| U.S. State Quarters Picture Quiz #2 | 0 | - | 4.75 | 38,491 |
| U.S. License Plates Picture Quiz | 0 | - | 4.61 | 52,996 |
| Satellite Images - U.S. States | 0 | - | 4.53 | 45,233 |
| Cartoon Versions of U.S. States | 0 | - | 4.75 | 64,019 |
| U.S. State Shapes Quiz #1 | 0 | - | 4.74 | 153,180 |
| U.S. State Shapes Quiz #2 | 0 | - | 4.80 | 102,182 |
| U.S. States that Start with N - Shape Quiz | 0 | - | 4.67 | 48,718 |
| Canada Provinces and Territories | 0 | - | 5.00 | 343,779 |
| Canada Provinces Map Quiz | 0 | - | 4.99 | 641,797 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 212,855 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,744 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,272 |
| Countries That Use the Euro | 0 | - | 4.95 | 105,623 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,248,983 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,343 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 365,106 |
