| U.S. Presidents Quiz | 0 | - | 5.00 | 3,710,093 |
| Prime Ministers of the UK | 0 | - | 4.95 | 440,278 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 192,685 |
| Country by Photo of its Leader | 0 | - | 4.72 | 124,291 |
| Prime Ministers of Australia | 0 | - | 4.50 | 32,025 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,665 |
| Name the Popes Quiz | 0 | - | 4.47 | 138,488 |
| Countries of the Popes | 0 | - | 4.79 | 128,375 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 427,172 |
| Top 10 Oldest African Countries | 0 | - | 4.88 | 28,074 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 108,966 |
| U.S. Presidents by Event | 0 | - | 4.58 | 34,755 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 94,041 |
| Presidential Middle Names | 0 | - | 4.41 | 60,442 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 382,415 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,476 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,681 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,496 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,503 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,223 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 438,203 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,784 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,956 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 305,533 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 35,066 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 70,237 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,798 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 83,658 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,152 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,372 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,177 |
| Soviet Leaders 1917–1991 | 0 | - | 4.44 | 95,212 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,505 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,056 |
| The Dictator Files: Saddam Hussein | 0 | - | 4.48 | 15,882 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,125 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,542 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,290 |
| First Ladies of the United States | 0 | - | 4.28 | 85,764 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,252 |
| U.S. Presidents in Order by First Letter | 0 | - | 4.32 | 77,290 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,240 |
| Add a Letter - Make a U.S. President | 0 | - | 4.57 | 24,006 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,290 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,863 |
| Every European Country Shape | 0 | - | 4.96 | 202,289 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,598 |
| All Modern-Day Countries Ever Controlled by Greeks | 0 | - | 4.98 | 54,361 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 649,206 |
| Name that Greek Letter | 0 | - | 4.93 | 324,237 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 61,328 |
| Countries of Iberia in History with a Map | 0 | - | 4.88 | 42,092 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,542 |
| Name the English Monarchs | 0 | - | 4.91 | 504,196 |
| Every Asian Country Shape | 0 | - | 4.95 | 88,013 |
| Paramount Leaders of China | 0 | - | 4.36 | 11,101 |
| All Modern-Day Countries Ever Controlled by Chinese People | 0 | - | 4.82 | 54,977 |
| Every African Country Shape | 0 | - | 4.90 | 87,723 |
| National Founders | 0 | - | 4.40 | 83,896 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,985 |
| U.S. President Scramble | 0 | - | 4.40 | 117,138 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,956 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,870 |
| All Modern-Day Countries Ever Controlled by French People | 0 | - | 4.99 | 58,247 |
| The Trojan War | 0 | - | 4.83 | 39,812 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,306 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 126,582 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,667 |
| Roman Emperors | 0 | - | 4.95 | 120,448 |
| Pope Facts | 0 | - | 4.39 | 31,306 |
| The Dictator Files: Chairman Mao | 0 | - | 4.28 | 20,710 |
| Africa Flags Map Quiz | 0 | - | 4.95 | 36,580 |
| Eastern Africa Map Quiz | 0 | - | 4.98 | 79,201 |
| Random American Countries on a Map | 0 | - | 4.96 | 99,805 |
| South America Flags Map Quiz | 0 | - | 4.95 | 88,367 |
| The Dictator Files: Fidel Castro | 0 | - | 4.19 | 12,357 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 28,682 |
| 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 | 30,675 |
| The John Adams Presidency | 0 | - | 4.12 | 8,762 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,951 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,750 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,336 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,710 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,872 |
| U.S. Presidents by Picture - Multiple Choice | 0 | - | 4.50 | 28,903 |
| U.S. State Flags | 0 | - | 4.89 | 171,428 |
| U.S. States that Start with M - Shape Quiz | 0 | - | 4.94 | 58,244 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 530,776 |
| Random European Countries on a Map | 0 | - | 4.97 | 284,361 |
| Europe Map with Random Merged Countries | 0 | - | 4.97 | 319,442 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 89,257 |
| History of Russia Quiz | 0 | - | 4.47 | 31,958 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.98 | 74,679 |
| Olympian Gods Quiz | 0 | - | 4.96 | 502,056 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,702 |
| Ancient Greek Words | 0 | - | 4.93 | 111,962 |
| History of Italy | 0 | - | 4.55 | 32,064 |
| Ancient Rome - True or False? | 0 | - | 4.85 | 43,050 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,297 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,730 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,310 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,972 |
| Ultimate Harry Potter Name Game | 0 | - | 4.94 | 494,030 |
| Tolkien's Middle Earth Map Quiz | 0 | - | 4.92 | 37,995 |
| Random Asian Countries on a Map | 0 | - | 4.91 | 170,423 |
| 10 Plagues of Egypt | 0 | - | 4.41 | 53,873 |
| Colonies of Africa with a Map | 0 | - | 4.79 | 54,566 |
| Random African Countries on a Map | 0 | - | 4.99 | 296,917 |
| Countries that Start with C - Shape Quiz | 0 | - | 4.89 | 99,494 |
| Countries that Start with I - Shape Quiz | 0 | - | 4.86 | 114,305 |
| Countries that Start with A - Shape Quiz | 0 | - | 4.93 | 34,750 |
| Countries that Start with N - Shape Quiz | 0 | - | 4.94 | 82,963 |
| History of South Africa | 0 | - | 4.60 | 17,724 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,110 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,832 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 129,419 |
| Europe Map Quiz | 0 | - | 5.00 | 4,772,812 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 35,063 |
| Random Sequential European Countries on a Map | 0 | - | 4.99 | 217,562 |
| Save Europeans by Guessing Countries | 0 | - | 4.86 | 214,809 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 94,173 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.37 | 48,563 |
| History of Austria | 0 | - | 4.70 | 17,914 |
| Geography of the French Empire | 0 | - | 4.45 | 27,161 |
| The French Revolution | 0 | - | 4.47 | 24,072 |
| History of France | 0 | - | 4.61 | 57,307 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 20,850 |
| Figures from Greek Mythology | 0 | - | 4.91 | 187,823 |
| The Vikings! | 0 | - | 4.46 | 28,372 |
| The Portuguese Empire | 0 | - | 4.58 | 12,086 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,412 |
| Countries the UK Declared War On | 0 | - | 4.55 | 122,786 |
| Geography of the British Empire | 0 | - | 4.48 | 39,745 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 279,768 |
| Random Sequential Asian Countries on a Map | 0 | - | 4.99 | 119,262 |
| History of Iran | 0 | - | 4.66 | 16,385 |
| History of China | 0 | - | 4.37 | 57,355 |
| History of India | 0 | - | 4.62 | 21,464 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 268,660 |
| Random Sequential African Countries on a Map | 0 | - | 5.00 | 127,983 |
| Communist Countries in History | 0 | - | 4.63 | 496,684 |
| Political Movements by Country | 0 | - | 4.46 | 72,633 |
| Countries that Start with B - Shape Quiz | 0 | - | 4.88 | 27,457 |
| George Washington... or George W. Bush? | 0 | - | 4.16 | 12,275 |
| Oceania Map Quiz | 0 | - | 4.98 | 654,665 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 51,006 |
| Australian Capitals | 0 | - | 4.92 | 62,761 |
| Australia Map Quiz | 0 | - | 4.95 | 345,289 |
| History of Mexico | 0 | - | 4.58 | 15,339 |
| United States Map Quiz | 0 | - | 4.98 | 4,164,140 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 80,046 |
| U.S. States by Governor | 0 | - | 4.43 | 18,081 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,559 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,717 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,714 |
| Red State or Blue State Trait? | 0 | - | 4.42 | 55,484 |
| Win the U.S. Presidential Election | 0 | - | 4.78 | 630,462 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,545 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,214 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,765 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,235 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,654 |
| Events in U.S. History | 0 | - | 4.41 | 28,721 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,137 |
| U.S. History for Dummies | 0 | - | 4.47 | 83,210 |
| The Most Recent... United States | 0 | - | 4.46 | 18,505 |
| U.S. License Plates Picture Quiz | 0 | - | 4.61 | 52,999 |
| U.S. Map with Random Merged States | 0 | - | 4.94 | 303,064 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 212,885 |
| Shapes of Mediterranean Sea Countries | 0 | - | 4.80 | 55,957 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,749 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,277 |
| Countries That Use the Euro | 0 | - | 4.95 | 105,679 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,365 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 365,157 |
| Official European Union Languages | 0 | - | 4.97 | 238,987 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,181 |
| Europe Geography Decoder | 0 | - | 4.86 | 70,128 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 115,774 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 429,274 |
| The Only European Country ... | 0 | - | 4.91 | 217,539 |
| European Countries NOT in NATO | 0 | - | 4.90 | 61,680 |
| French History Multiple Choice | 0 | - | 4.55 | 33,136 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 145,023 |
| History of Germany | 0 | - | 4.39 | 52,907 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,088 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,952 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 73,930 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,720 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,437 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,798 |
| Geography of the Roman Empire | 0 | - | 4.56 | 52,001 |
| Roman Names for Places | 0 | - | 4.62 | 58,421 |
| Byzantine History | 0 | - | 4.91 | 28,924 |
| Byzantine Emperors | 0 | - | 4.92 | 14,384 |
| History of The Netherlands | 0 | - | 4.46 | 17,491 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,234 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,925 |
