| Countries of the Soviet Union | 0 | - | 4.98 | 193,932 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,291 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,659,089 |
| Prime Ministers of the UK | 0 | - | 4.96 | 435,037 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 424,056 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 379,763 |
| U.S. Vice Presidents | 0 | - | 4.41 | 135,107 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 108,028 |
| U.S. Presidents by Event | 0 | - | 4.58 | 33,616 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 93,068 |
| Presidential Middle Names | 0 | - | 4.41 | 59,754 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 52,801 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 93,894 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,195 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 190,063 |
| Play-Doh Presidents | 0 | - | 5.00 | 81,744 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,823 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,765 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.37 | 48,315 |
| Country by Photo of its Leader | 0 | - | 4.74 | 123,338 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,712 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,172 |
| First Ladies of the United States | 0 | - | 4.28 | 85,274 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,121 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 76,413 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,015 |
| Add a Letter - Make a U.S. President | 0 | - | 4.61 | 23,848 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,698 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 160,555 |
| Biggest Trading Partners – United Kingdom | 0 | - | 4.92 | 79,587 |
| Countries of Europe After World War II | 0 | - | 4.99 | 186,862 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 155,479 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 88,120 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 433,905 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,662 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 103,895 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,448 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 303,507 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 69,491 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,057 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,513 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,546 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,199 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,105 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 143,326 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,328 |
| Name the Popes Quiz | 0 | - | 4.47 | 137,258 |
| Countries of the Popes | 0 | - | 4.79 | 127,306 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,009 |
| African Countries with the Most Christians | 0 | - | 4.94 | 74,920 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,559 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,386 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 28,484 |
| The George Washington Presidency | 0 | - | 4.03 | 14,480 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,666 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,519 |
| The John Adams Presidency | 0 | - | 4.12 | 8,682 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,879 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,689 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,232 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,615 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,782 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,388 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,116 |
| Every European Country Shape | 0 | - | 4.96 | 200,362 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,576 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 642,571 |
| Name that Greek Letter | 0 | - | 4.94 | 321,841 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,451 |
| Name the English Monarchs | 0 | - | 4.92 | 498,443 |
| Vatican City Country Quiz | 0 | - | 4.53 | 44,043 |
| Asian Countries with the Most Christians | 0 | - | 4.85 | 96,363 |
| Paramount Leaders of China | 0 | - | 4.36 | 11,010 |
| Biggest Trading Partners – Australia | 0 | - | 4.93 | 61,002 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,370 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,090 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,482 |
| U.S. President Scramble | 0 | - | 4.40 | 116,259 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,039 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,379 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,718 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 94,843 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,187 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 132,058 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,664 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 70,844 |
| Olympian Gods Quiz | 0 | - | 4.96 | 496,846 |
| The Trojan War | 0 | - | 4.83 | 39,466 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,699 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 124,475 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,114 |
| Roman Emperors | 0 | - | 4.95 | 118,614 |
| Biggest Trading Partners - Spain | 0 | - | 4.92 | 53,528 |
| James Bond Countries Visited Map | 0 | - | 4.99 | 63,615 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 236,470 |
| Most-Visited Countries by Popes | 0 | - | 4.55 | 83,234 |
| Biggest Trading Partners - China | 0 | - | 4.95 | 74,714 |
| The Dictator Files: Chairman Mao | 0 | - | 4.28 | 20,585 |
| National Founders | 0 | - | 4.40 | 83,672 |
| Flags of WW1 | 0 | - | 4.60 | 37,995 |
| Colonies of Africa with a Map | 0 | - | 4.77 | 54,007 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 28,893 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.49 | 11,673 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 19,963 |
| U.S. Presidents True or False | 0 | - | 3.96 | 15,537 |
| Random U.S. Presidents by Picture | 0 | - | 4.39 | 65,869 |
| The Kennedy Family | 0 | - | 3.90 | 14,027 |
| The American Revolution | 0 | - | 4.52 | 54,071 |
| Category Elimination - U.S. States #1 | 0 | - | 4.88 | 218,733 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 132,668 |
| Random European Countries on a Map | 0 | - | 4.97 | 282,144 |
| History of Russia Quiz | 0 | - | 4.49 | 31,802 |
| Countries of the German Empire | 0 | - | 4.51 | 37,689 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 72,632 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,326 |
| Ancient Greek Words | 0 | - | 4.92 | 110,793 |
| History of Italy | 0 | - | 4.55 | 31,842 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,496 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,003 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,568 |
| Tolkien's Middle Earth Map Quiz | 0 | - | 4.91 | 37,180 |
| Top 100 UK Baby Girls' Names in 1850 | 0 | - | 4.35 | 61,588 |
| People in Pictures with Queen Elizabeth II | 0 | - | 4.38 | 29,071 |
| Countries "Ruled" by King Charles III | 0 | - | 4.78 | 82,612 |
| Pope Facts | 0 | - | 4.39 | 31,063 |
| 10 Plagues of Egypt | 0 | - | 4.41 | 53,329 |
| Communist Countries in History | 0 | - | 4.63 | 492,833 |
| History of India | 0 | - | 4.61 | 21,298 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.68 | 55,202 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 266,682 |
| History of South Africa | 0 | - | 4.60 | 17,612 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,766 |
| Win the U.S. Presidential Election | 0 | - | 4.80 | 619,339 |
| The Bill Clinton Presidency | 0 | - | 4.22 | 31,364 |
| The George H. W. Bush Presidency | 0 | - | 4.36 | 21,425 |
| The Ronald Reagan Presidency | 0 | - | 4.26 | 24,726 |
| The Barack Obama Presidency | 0 | - | 4.16 | 25,266 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 128,732 |
| Biggest European Cities by Letter | 0 | - | 4.55 | 126,263 |
| Europe Map Quiz | 0 | - | 5.00 | 4,734,273 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 526,629 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,773 |
| Random Sequential European Countries on a Map | 0 | - | 4.99 | 216,239 |
| Europe Map with Random Merged Countries | 0 | - | 4.97 | 315,925 |
| Save Europeans by Guessing Countries | 0 | - | 4.84 | 209,831 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 93,594 |
| History of Austria | 0 | - | 4.70 | 17,765 |
| Geography of the French Empire | 0 | - | 4.45 | 26,947 |
| The French Revolution | 0 | - | 4.46 | 23,801 |
| History of France | 0 | - | 4.59 | 56,186 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,392 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,801 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,785 |
| Figures from Greek Mythology | 0 | - | 4.91 | 185,165 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,012 |
| Byzantine History | 0 | - | 4.91 | 28,648 |
| Count in Roman Numerals - 30 Second Sprint | 0 | - | 4.26 | 101,617 |
| The Vikings! | 0 | - | 4.46 | 28,253 |
| The Portuguese Empire | 0 | - | 4.54 | 12,000 |
| Arthurian Legend | 0 | - | 4.33 | 25,054 |
| Biggest British Empire Countries | 0 | - | 4.73 | 98,369 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,212 |
| Countries the UK Declared War On | 0 | - | 4.61 | 121,890 |
| Geography of the British Empire | 0 | - | 4.48 | 39,507 |
| Medieval English History | 0 | - | 4.53 | 43,334 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 277,260 |
| History of Iran | 0 | - | 4.65 | 16,280 |
| Prime Ministers of Israel | 0 | - | 3.97 | 17,828 |
| Vietnam War Countries | 0 | - | 4.83 | 93,674 |
| History of China | 0 | - | 4.37 | 56,735 |
| Political Movements by Country | 0 | - | 4.46 | 72,292 |
| Countries of Africa | 0 | - | 5.00 | 2,510,597 |
| Africa Cities Map Quiz | 0 | - | 4.97 | 98,473 |
| Flags of Africa Quiz | 0 | - | 5.00 | 464,075 |
| Africa Map Quiz | 0 | - | 5.00 | 2,105,627 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 45,895 |
| Top 10 Biggest African Countries by Area | 0 | - | 4.99 | 215,740 |
| 10 Southernmost Countries in Africa | 0 | - | 4.98 | 115,645 |
| 10 Northernmost Countries in Africa | 0 | - | 4.98 | 160,369 |
| Top 10 Smallest African Countries by Area | 0 | - | 4.96 | 32,559 |
| African East Coast | 0 | - | 4.96 | 95,140 |
| African Countries with the Shortest Names | 0 | - | 4.98 | 152,261 |
| Western Africa Map Quiz | 0 | - | 4.97 | 73,016 |
| Top African Languages on a Map | 0 | - | 4.92 | 72,601 |
| African Island Countries | 0 | - | 4.96 | 100,867 |
| Countries of Africa with an Empty Map | 0 | - | 5.00 | 241,835 |
| All First-Level Subdivisions of Africa on a Map | 0 | - | 4.92 | 32,776 |
| Oceania Map Quiz | 0 | - | 4.98 | 635,982 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 49,902 |
| Australian States and Territories | 0 | - | 4.96 | 140,997 |
| Australian Capitals | 0 | - | 4.92 | 62,599 |
| Australian Immigration by Country | 0 | - | 4.81 | 77,039 |
| Australia Map Quiz | 0 | - | 4.94 | 342,677 |
| Australia True or False | 0 | - | 4.87 | 56,542 |
| Flags of North and South America | 0 | - | 4.99 | 368,011 |
| 10 Biggest American Countries by Area | 0 | - | 4.95 | 112,191 |
| Top 10 Most Populous American Countries | 0 | - | 4.97 | 143,234 |
| Latin American Countries Map Quiz | 0 | - | 4.97 | 128,354 |
| History of Mexico | 0 | - | 4.58 | 15,237 |
| South America Map Quiz | 0 | - | 5.00 | 1,541,862 |
