| Countries of the Soviet Union | 0 | - | 4.98 | 194,480 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,660 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,691,765 |
| Prime Ministers of the UK | 0 | - | 4.95 | 438,262 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 426,126 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 381,261 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 108,593 |
| U.S. Presidents by Event | 0 | - | 4.58 | 34,336 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 93,674 |
| Presidential Middle Names | 0 | - | 4.41 | 60,159 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,235 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,507 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,384 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 191,509 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,196 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,937 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,956 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.37 | 48,459 |
| Country by Photo of its Leader | 0 | - | 4.72 | 123,938 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,898 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,136 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,245 |
| First Ladies of the United States | 0 | - | 4.28 | 85,579 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,211 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 76,994 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,172 |
| Add a Letter - Make a U.S. President | 0 | - | 4.57 | 23,944 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,809 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 161,332 |
| Biggest Trading Partners – United Kingdom | 0 | - | 4.93 | 80,241 |
| Countries of Europe After World War II | 0 | - | 4.99 | 188,180 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 156,368 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 88,818 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 436,574 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,048 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 104,197 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,273 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 304,745 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 69,916 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,007 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 79,530 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,418 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,811 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,715 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,919 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 144,410 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,427 |
| Name the Popes Quiz | 0 | - | 4.47 | 137,995 |
| Countries of the Popes | 0 | - | 4.79 | 127,974 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,705 |
| African Countries with the Most Christians | 0 | - | 4.94 | 75,512 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,834 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,511 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 28,614 |
| The George Washington Presidency | 0 | - | 4.03 | 14,539 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,718 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,633 |
| The John Adams Presidency | 0 | - | 4.12 | 8,739 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,924 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,733 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,311 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,663 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,843 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,621 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,455 |
| Every European Country Shape | 0 | - | 4.96 | 201,435 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 646,581 |
| Name that Greek Letter | 0 | - | 4.93 | 323,236 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 60,999 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,168 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,371 |
| Name the English Monarchs | 0 | - | 4.91 | 501,913 |
| Vatican City Country Quiz | 0 | - | 4.53 | 44,311 |
| Asian Countries with the Most Christians | 0 | - | 4.85 | 97,110 |
| Paramount Leaders of China | 0 | - | 4.36 | 11,059 |
| Biggest Trading Partners – Australia | 0 | - | 4.93 | 61,482 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,484 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,177 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,647 |
| U.S. President Scramble | 0 | - | 4.40 | 116,696 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,162 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,542 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,856 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 95,846 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,438 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 132,999 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,778 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 71,385 |
| Olympian Gods Quiz | 0 | - | 4.96 | 500,135 |
| The Trojan War | 0 | - | 4.83 | 39,672 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,648 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 125,690 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,456 |
| Roman Emperors | 0 | - | 4.95 | 119,764 |
| Biggest Trading Partners - Spain | 0 | - | 4.92 | 53,754 |
| James Bond Countries Visited Map | 0 | - | 4.99 | 64,132 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 237,260 |
| Most-Visited Countries by Popes | 0 | - | 4.56 | 83,639 |
| Biggest Trading Partners - China | 0 | - | 4.95 | 75,111 |
| The Dictator Files: Chairman Mao | 0 | - | 4.28 | 20,666 |
| National Founders | 0 | - | 4.40 | 83,808 |
| Flags of WW1 | 0 | - | 4.60 | 38,326 |
| Colonies of Africa with a Map | 0 | - | 4.78 | 54,385 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,067 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,771 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 20,041 |
| U.S. Presidents True or False | 0 | - | 3.96 | 15,591 |
| Random U.S. Presidents by Picture | 0 | - | 4.40 | 66,188 |
| The Kennedy Family | 0 | - | 3.90 | 14,065 |
| The American Revolution | 0 | - | 4.52 | 54,226 |
| Category Elimination - U.S. States #1 | 0 | - | 4.88 | 220,519 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 133,979 |
| Random European Countries on a Map | 0 | - | 4.97 | 283,205 |
| Europe Map with Random Merged Countries | 0 | - | 4.97 | 317,744 |
| History of Russia Quiz | 0 | - | 4.49 | 31,898 |
| Countries of the German Empire | 0 | - | 4.51 | 37,888 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 73,838 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,563 |
| Ancient Greek Words | 0 | - | 4.93 | 111,440 |
| History of Italy | 0 | - | 4.55 | 31,954 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,634 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,188 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,817 |
| Tolkien's Middle Earth Map Quiz | 0 | - | 4.92 | 37,762 |
| Top 100 UK Baby Girls' Names in 1850 | 0 | - | 4.35 | 61,997 |
| Countries Most-Visited By Queen Elizabeth II | 0 | - | 4.41 | 51,711 |
| People in Pictures with Queen Elizabeth II | 0 | - | 4.38 | 29,239 |
| Countries "Ruled" by King Charles III | 0 | - | 4.77 | 82,716 |
| Pope Facts | 0 | - | 4.39 | 31,220 |
| 10 Plagues of Egypt | 0 | - | 4.41 | 53,792 |
| Communist Countries in History | 0 | - | 4.63 | 495,188 |
| History of India | 0 | - | 4.62 | 21,408 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.69 | 55,413 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 267,999 |
| History of South Africa | 0 | - | 4.60 | 17,668 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,946 |
| Win the U.S. Presidential Election | 0 | - | 4.78 | 626,236 |
| The Bill Clinton Presidency | 0 | - | 4.24 | 31,443 |
| The George H. W. Bush Presidency | 0 | - | 4.36 | 21,481 |
| The Ronald Reagan Presidency | 0 | - | 4.26 | 24,811 |
| The Barack Obama Presidency | 0 | - | 4.16 | 25,378 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 129,188 |
| Biggest European Cities by Letter | 0 | - | 4.54 | 126,586 |
| Europe Map Quiz | 0 | - | 5.00 | 4,758,131 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 529,092 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,941 |
| Random Sequential European Countries on a Map | 0 | - | 4.99 | 217,020 |
| Save Europeans by Guessing Countries | 0 | - | 4.83 | 212,620 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 93,959 |
| History of Austria | 0 | - | 4.70 | 17,849 |
| Geography of the French Empire | 0 | - | 4.45 | 27,039 |
| The French Revolution | 0 | - | 4.46 | 23,918 |
| History of France | 0 | - | 4.59 | 56,902 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.40 | 23,466 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,956 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,887 |
| Figures from Greek Mythology | 0 | - | 4.91 | 186,606 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,280 |
| Byzantine History | 0 | - | 4.91 | 28,770 |
| Count in Roman Numerals - 30 Second Sprint | 0 | - | 4.26 | 102,682 |
| The Vikings! | 0 | - | 4.46 | 28,333 |
| The Portuguese Empire | 0 | - | 4.58 | 12,054 |
| Arthurian Legend | 0 | - | 4.33 | 25,102 |
| Biggest British Empire Countries | 0 | - | 4.74 | 99,843 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,318 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,372 |
| Geography of the British Empire | 0 | - | 4.48 | 39,640 |
| Medieval English History | 0 | - | 4.53 | 43,483 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 278,833 |
| History of Iran | 0 | - | 4.66 | 16,346 |
| Prime Ministers of Israel | 0 | - | 3.97 | 17,930 |
| Vietnam War Countries | 0 | - | 4.82 | 94,132 |
| History of China | 0 | - | 4.37 | 57,112 |
| Political Movements by Country | 0 | - | 4.46 | 72,490 |
| Countries of Africa | 0 | - | 5.00 | 2,532,461 |
| Africa Cities Map Quiz | 0 | - | 4.97 | 98,923 |
| Flags of Africa Quiz | 0 | - | 5.00 | 469,991 |
| Africa Map Quiz | 0 | - | 5.00 | 2,115,815 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 46,705 |
| Top 10 Biggest African Countries by Area | 0 | - | 4.99 | 216,780 |
| 10 Southernmost Countries in Africa | 0 | - | 4.98 | 116,480 |
| 10 Northernmost Countries in Africa | 0 | - | 4.98 | 161,101 |
| Top 10 Smallest African Countries by Area | 0 | - | 4.96 | 33,163 |
| African East Coast | 0 | - | 4.96 | 95,918 |
| African Countries with the Shortest Names | 0 | - | 4.98 | 153,315 |
| Western Africa Map Quiz | 0 | - | 4.97 | 73,736 |
| Top African Languages on a Map | 0 | - | 4.92 | 73,812 |
| African Island Countries | 0 | - | 4.96 | 101,507 |
| Countries of Africa with an Empty Map | 0 | - | 5.00 | 243,207 |
| All First-Level Subdivisions of Africa on a Map | 0 | - | 4.92 | 33,170 |
| Oceania Map Quiz | 0 | - | 4.98 | 641,220 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 50,555 |
| Australian States and Territories | 0 | - | 4.96 | 141,791 |
| Australian Capitals | 0 | - | 4.92 | 62,707 |
| Australian Immigration by Country | 0 | - | 4.81 | 77,251 |
| Australia Map Quiz | 0 | - | 4.95 | 344,091 |
| Australia True or False | 0 | - | 4.87 | 56,803 |
| Flags of North and South America | 0 | - | 4.99 | 372,374 |
| 10 Biggest American Countries by Area | 0 | - | 4.95 | 112,552 |
| Top 10 Most Populous American Countries | 0 | - | 4.97 | 144,139 |
