| U.S. Presidents Quiz | 0 | - | 5.00 | 3,670,266 |
| Prime Ministers of the UK | 0 | - | 4.96 | 436,233 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 190,515 |
| Country by Photo of its Leader | 0 | - | 4.74 | 123,551 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,768 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,241 |
| Name the Popes Quiz | 0 | - | 4.47 | 137,493 |
| Countries of the Popes | 0 | - | 4.79 | 127,534 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 424,710 |
| Top 10 Oldest African Countries | 0 | - | 4.88 | 27,718 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 108,205 |
| U.S. Presidents by Event | 0 | - | 4.58 | 33,839 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 93,276 |
| Presidential Middle Names | 0 | - | 4.41 | 59,882 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 380,201 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 52,924 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,120 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,252 |
| Play-Doh Presidents | 0 | - | 5.00 | 81,884 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,708 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 434,833 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,229 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,719 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,646 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 304,036 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,832 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 69,621 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,419 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,766 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,872 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,417 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,298 |
| Soviet Leaders 1917–1991 | 0 | - | 4.43 | 94,636 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,366 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,732 |
| The Dictator Files: Saddam Hussein | 0 | - | 4.48 | 15,794 |
| Every African Country Shape | 0 | - | 4.90 | 86,512 |
| U.S. Vice Presidents | 0 | - | 4.39 | 135,530 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,191 |
| First Ladies of the United States | 0 | - | 4.28 | 85,350 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,151 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 76,617 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,067 |
| Add a Letter - Make a U.S. President | 0 | - | 4.57 | 23,874 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,652 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,725 |
| Every European Country Shape | 0 | - | 4.96 | 200,696 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,268 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 644,064 |
| Name that Greek Letter | 0 | - | 4.93 | 322,338 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 60,593 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,292 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 85,770 |
| Name the English Monarchs | 0 | - | 4.92 | 499,655 |
| Every Asian Country Shape | 0 | - | 4.95 | 86,934 |
| Paramount Leaders of China | 0 | - | 4.36 | 11,021 |
| National Founders | 0 | - | 4.40 | 83,716 |
| Africa Flags Map Quiz | 0 | - | 4.95 | 36,118 |
| Eastern Africa Map Quiz | 0 | - | 4.98 | 78,426 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,856 |
| U.S. President Scramble | 0 | - | 4.40 | 116,409 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,760 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,701 |
| The Trojan War | 0 | - | 4.83 | 39,536 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,042 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 124,942 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,230 |
| Roman Emperors | 0 | - | 4.95 | 119,051 |
| Pope Facts | 0 | - | 4.39 | 31,118 |
| The Dictator Files: Chairman Mao | 0 | - | 4.28 | 20,610 |
| Colonies of Africa with a Map | 0 | - | 4.77 | 54,148 |
| Random African Countries on a Map | 0 | - | 4.99 | 294,488 |
| Random American Countries on a Map | 0 | - | 4.96 | 98,947 |
| South America Flags Map Quiz | 0 | - | 4.95 | 87,074 |
| The Dictator Files: Fidel Castro | 0 | - | 4.19 | 12,274 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 28,535 |
| The George Washington Presidency | 0 | - | 4.03 | 14,498 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,681 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,554 |
| The John Adams Presidency | 0 | - | 4.12 | 8,701 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,897 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,708 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,258 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,634 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,801 |
| U.S. Presidents by Picture - Multiple Choice | 0 | - | 4.49 | 28,678 |
| U.S. State Flags | 0 | - | 4.89 | 168,459 |
| U.S. States that Start with M - Shape Quiz | 0 | - | 4.94 | 57,828 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 527,386 |
| Random European Countries on a Map | 0 | - | 4.97 | 282,530 |
| Europe Map with Random Merged Countries | 0 | - | 4.97 | 316,579 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 88,422 |
| History of Russia Quiz | 0 | - | 4.49 | 31,831 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 73,016 |
| Olympian Gods Quiz | 0 | - | 4.96 | 497,929 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,414 |
| Ancient Greek Words | 0 | - | 4.93 | 111,024 |
| History of Italy | 0 | - | 4.55 | 31,880 |
| Ancient Rome - True or False? | 0 | - | 4.85 | 42,723 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,790 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,545 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,070 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,690 |
| Ultimate Harry Potter Name Game | 0 | - | 4.94 | 492,022 |
| Tolkien's Middle Earth Map Quiz | 0 | - | 4.91 | 37,291 |
| Random Asian Countries on a Map | 0 | - | 4.90 | 169,206 |
| 10 Plagues of Egypt | 0 | - | 4.41 | 53,667 |
| Countries that Start with C - Shape Quiz | 0 | - | 4.89 | 98,950 |
| Countries that Start with I - Shape Quiz | 0 | - | 4.86 | 113,702 |
| Countries that Start with A - Shape Quiz | 0 | - | 4.92 | 34,033 |
| Countries that Start with N - Shape Quiz | 0 | - | 4.94 | 82,485 |
| History of India | 0 | - | 4.61 | 21,331 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 267,217 |
| Random Sequential African Countries on a Map | 0 | - | 5.00 | 127,075 |
| History of South Africa | 0 | - | 4.60 | 17,632 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 28,946 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.49 | 11,693 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 128,870 |
| Europe Map Quiz | 0 | - | 5.00 | 4,742,586 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,826 |
| Random Sequential European Countries on a Map | 0 | - | 4.99 | 216,537 |
| Save Europeans by Guessing Countries | 0 | - | 4.83 | 210,704 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 93,741 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.37 | 48,377 |
| History of Austria | 0 | - | 4.70 | 17,792 |
| Geography of the French Empire | 0 | - | 4.45 | 26,983 |
| The French Revolution | 0 | - | 4.46 | 23,849 |
| History of France | 0 | - | 4.59 | 56,506 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,418 |
| Figures from Greek Mythology | 0 | - | 4.91 | 185,664 |
| The Vikings! | 0 | - | 4.46 | 28,278 |
| The Portuguese Empire | 0 | - | 4.58 | 12,022 |
| Groups of Things - Harry Potter | 0 | - | 4.82 | 280,570 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,255 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,048 |
| Geography of the British Empire | 0 | - | 4.48 | 39,566 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 278,018 |
| Random Sequential Asian Countries on a Map | 0 | - | 4.99 | 118,533 |
| History of Iran | 0 | - | 4.66 | 16,298 |
| History of China | 0 | - | 4.37 | 56,868 |
| Communist Countries in History | 0 | - | 4.63 | 493,627 |
| Political Movements by Country | 0 | - | 4.46 | 72,360 |
| Countries that Start with B - Shape Quiz | 0 | - | 4.91 | 26,800 |
| George Washington... or George W. Bush? | 0 | - | 4.16 | 12,228 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.69 | 55,278 |
| Countries of Africa | 0 | - | 5.00 | 2,518,031 |
| Africa Map Quiz | 0 | - | 5.00 | 2,109,449 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 46,169 |
| African East Coast | 0 | - | 4.96 | 95,425 |
| Western Africa Map Quiz | 0 | - | 4.97 | 73,285 |
| Oceania Map Quiz | 0 | - | 4.98 | 637,839 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 50,114 |
| Australian Capitals | 0 | - | 4.92 | 62,644 |
| Australia Map Quiz | 0 | - | 4.94 | 343,091 |
| History of Mexico | 0 | - | 4.58 | 15,252 |
| United States Map Quiz | 0 | - | 4.98 | 4,147,007 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,826 |
| U.S. States by Governor | 0 | - | 4.43 | 18,008 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,413 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,610 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,591 |
| Red State or Blue State Trait? | 0 | - | 4.42 | 55,098 |
| Win the U.S. Presidential Election | 0 | - | 4.80 | 621,652 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,397 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,118 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,524 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,072 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,430 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,037 |
| U.S. History for Dummies | 0 | - | 4.47 | 82,684 |
| U.S. License Plates Picture Quiz | 0 | - | 4.59 | 52,743 |
| U.S. Map with Random Merged States | 0 | - | 4.94 | 300,675 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 210,882 |
| Shapes of Mediterranean Sea Countries | 0 | - | 4.80 | 55,689 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,421 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,140 |
| Countries That Use the Euro | 0 | - | 4.95 | 103,729 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 68,802 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 363,041 |
| Official European Union Languages | 0 | - | 4.97 | 237,510 |
| European Countries in their Native Language | 0 | - | 4.99 | 157,227 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,712 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 114,161 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 426,250 |
| The Only European Country ... | 0 | - | 4.91 | 214,869 |
| European Countries NOT in NATO | 0 | - | 4.90 | 60,150 |
| French History Multiple Choice | 0 | - | 4.55 | 32,932 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 143,715 |
| History of Germany | 0 | - | 4.39 | 52,699 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,854 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,825 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 73,183 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,518 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,112 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,604 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,760 |
| Roman Names for Places | 0 | - | 4.62 | 58,017 |
| Byzantine History | 0 | - | 4.91 | 28,678 |
| History of The Netherlands | 0 | - | 4.46 | 17,351 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,069 |
