| Countries of the Soviet Union | 0 | - | 4.98 | 193,800 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,219 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,652,848 |
| Prime Ministers of the UK | 0 | - | 4.96 | 434,498 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 423,587 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 379,501 |
| U.S. Vice Presidents | 0 | - | 4.41 | 134,885 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 107,921 |
| U.S. Presidents by Event | 0 | - | 4.58 | 33,450 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 92,984 |
| Presidential Middle Names | 0 | - | 4.41 | 59,688 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 52,715 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 93,798 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,161 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 189,781 |
| Play-Doh Presidents | 0 | - | 5.00 | 81,655 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,812 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,731 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.37 | 48,282 |
| Country by Photo of its Leader | 0 | - | 4.74 | 123,226 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,674 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,162 |
| First Ladies of the United States | 0 | - | 4.28 | 85,230 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,109 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 76,261 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 15,998 |
| Add a Letter - Make a U.S. President | 0 | - | 4.61 | 23,829 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,681 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 160,434 |
| Biggest Trading Partners – United Kingdom | 0 | - | 4.92 | 79,486 |
| Countries of Europe After World War II | 0 | - | 4.99 | 186,678 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 155,314 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 88,012 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 433,429 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,608 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 103,847 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,287 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 303,322 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 69,383 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 148,900 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,384 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,350 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,077 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 55,987 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 143,128 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,305 |
| Name the Popes Quiz | 0 | - | 4.47 | 137,111 |
| Countries of the Popes | 0 | - | 4.79 | 127,178 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 105,839 |
| African Countries with the Most Christians | 0 | - | 4.94 | 74,846 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,507 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,374 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 28,457 |
| The George Washington Presidency | 0 | - | 4.03 | 14,473 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,658 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,491 |
| The John Adams Presidency | 0 | - | 4.12 | 8,675 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,868 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,681 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,206 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,608 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,770 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,220 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,028 |
| Every European Country Shape | 0 | - | 4.96 | 200,092 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,513 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 641,728 |
| Name that Greek Letter | 0 | - | 4.94 | 321,601 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,219 |
| Name the English Monarchs | 0 | - | 4.92 | 497,772 |
| Vatican City Country Quiz | 0 | - | 4.53 | 43,991 |
| Asian Countries with the Most Christians | 0 | - | 4.85 | 96,208 |
| Paramount Leaders of China | 0 | - | 4.36 | 10,996 |
| Biggest Trading Partners – Australia | 0 | - | 4.93 | 60,941 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,360 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,085 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,442 |
| U.S. President Scramble | 0 | - | 4.40 | 116,187 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,016 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,351 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,690 |
| U.S. States or European Countries by Area | 0 | - | 4.94 | 94,673 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,130 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 131,892 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,627 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 70,756 |
| Olympian Gods Quiz | 0 | - | 4.96 | 495,829 |
| The Trojan War | 0 | - | 4.83 | 39,422 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,500 |
| 101 Figures from Greek Mythology | 0 | - | 5.00 | 124,226 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,034 |
| Roman Emperors | 0 | - | 4.95 | 118,427 |
| Biggest Trading Partners - Spain | 0 | - | 4.91 | 53,502 |
| James Bond Countries Visited Map | 0 | - | 4.99 | 63,408 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 236,197 |
| Most-Visited Countries by Popes | 0 | - | 4.55 | 83,153 |
| Biggest Trading Partners - China | 0 | - | 4.95 | 74,670 |
| The Dictator Files: Chairman Mao | 0 | - | 4.28 | 20,572 |
| National Founders | 0 | - | 4.40 | 83,643 |
| Flags of WW1 | 0 | - | 4.60 | 37,922 |
| Colonies of Africa with a Map | 0 | - | 4.77 | 53,928 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 28,878 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.49 | 11,669 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 19,958 |
| U.S. Presidents True or False | 0 | - | 3.96 | 15,525 |
| Random U.S. Presidents by Picture | 0 | - | 4.39 | 65,798 |
| The Kennedy Family | 0 | - | 3.90 | 14,025 |
| The American Revolution | 0 | - | 4.52 | 54,049 |
| Category Elimination - U.S. States #1 | 0 | - | 4.87 | 218,470 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 132,447 |
| Random European Countries on a Map | 0 | - | 4.97 | 281,912 |
| History of Russia Quiz | 0 | - | 4.49 | 31,787 |
| Countries of the German Empire | 0 | - | 4.51 | 37,649 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 72,423 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,294 |
| Ancient Greek Words | 0 | - | 4.92 | 110,652 |
| History of Italy | 0 | - | 4.55 | 31,810 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,477 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 76,976 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,379 |
| Tolkien's Middle Earth Map Quiz | 0 | - | 4.91 | 37,092 |
| Top 100 UK Baby Girls' Names in 1850 | 0 | - | 4.35 | 61,501 |
| People in Pictures with Queen Elizabeth II | 0 | - | 4.38 | 29,029 |
| Countries "Ruled" by King Charles III | 0 | - | 4.78 | 82,594 |
| Pope Facts | 0 | - | 4.39 | 31,033 |
| 10 Plagues of Egypt | 0 | - | 4.39 | 51,040 |
| Communist Countries in History | 0 | - | 4.63 | 492,409 |
| History of India | 0 | - | 4.61 | 21,278 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.68 | 55,160 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 266,483 |
| History of South Africa | 0 | - | 4.60 | 17,599 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,732 |
| Win the U.S. Presidential Election | 0 | - | 4.80 | 618,198 |
| The Bill Clinton Presidency | 0 | - | 4.22 | 31,350 |
| The George H. W. Bush Presidency | 0 | - | 4.36 | 21,416 |
| The Ronald Reagan Presidency | 0 | - | 4.26 | 24,718 |
| The Barack Obama Presidency | 0 | - | 4.16 | 25,249 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 128,667 |
| Biggest European Cities by Letter | 0 | - | 4.55 | 126,215 |
| Europe Map Quiz | 0 | - | 5.00 | 4,730,249 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 526,258 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,737 |
| Random Sequential European Countries on a Map | 0 | - | 4.99 | 216,121 |
| Europe Map with Random Merged Countries | 0 | - | 4.97 | 315,651 |
| Save Europeans by Guessing Countries | 0 | - | 4.84 | 209,343 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 93,528 |
| History of Austria | 0 | - | 4.70 | 17,743 |
| Geography of the French Empire | 0 | - | 4.48 | 26,923 |
| The French Revolution | 0 | - | 4.46 | 23,776 |
| History of France | 0 | - | 4.59 | 55,991 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,382 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,764 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,765 |
| Figures from Greek Mythology | 0 | - | 4.91 | 184,880 |
| Countries Italy Declared War On | 0 | - | 4.75 | 42,935 |
| Byzantine History | 0 | - | 4.91 | 28,610 |
| Count in Roman Numerals - 30 Second Sprint | 0 | - | 4.26 | 101,436 |
| The Vikings! | 0 | - | 4.45 | 28,244 |
| The Portuguese Empire | 0 | - | 4.54 | 11,987 |
| Arthurian Legend | 0 | - | 4.33 | 25,049 |
| Biggest British Empire Countries | 0 | - | 4.73 | 89,312 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,167 |
| Countries the UK Declared War On | 0 | - | 4.61 | 121,755 |
| Geography of the British Empire | 0 | - | 4.48 | 39,467 |
| Medieval English History | 0 | - | 4.53 | 43,312 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 277,073 |
| History of Iran | 0 | - | 4.65 | 16,270 |
| Prime Ministers of Israel | 0 | - | 3.97 | 17,817 |
| Vietnam War Countries | 0 | - | 4.83 | 93,584 |
| History of China | 0 | - | 4.37 | 56,682 |
| Political Movements by Country | 0 | - | 4.46 | 72,254 |
| Countries of Africa | 0 | - | 5.00 | 2,506,900 |
| Africa Cities Map Quiz | 0 | - | 4.97 | 98,426 |
| Flags of Africa Quiz | 0 | - | 5.00 | 463,060 |
| Africa Map Quiz | 0 | - | 5.00 | 2,103,875 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 45,789 |
| Top 10 Biggest African Countries by Area | 0 | - | 4.99 | 215,583 |
| 10 Southernmost Countries in Africa | 0 | - | 4.98 | 115,542 |
| 10 Northernmost Countries in Africa | 0 | - | 4.98 | 160,235 |
| Top 10 Smallest African Countries by Area | 0 | - | 4.96 | 32,485 |
| African East Coast | 0 | - | 4.96 | 95,014 |
| African Countries with the Shortest Names | 0 | - | 4.98 | 152,052 |
| Western Africa Map Quiz | 0 | - | 4.97 | 72,899 |
| Top African Languages on a Map | 0 | - | 4.92 | 72,386 |
| African Island Countries | 0 | - | 4.96 | 100,756 |
| Countries of Africa with an Empty Map | 0 | - | 5.00 | 241,598 |
| All First-Level Subdivisions of Africa on a Map | 0 | - | 4.92 | 32,665 |
| Oceania Map Quiz | 0 | - | 4.98 | 635,121 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 49,774 |
| Australian States and Territories | 0 | - | 4.95 | 140,673 |
| Australian Capitals | 0 | - | 4.92 | 62,592 |
| Australian Immigration by Country | 0 | - | 4.81 | 77,008 |
| Australia Map Quiz | 0 | - | 4.94 | 342,422 |
| Australia True or False | 0 | - | 4.87 | 56,494 |
| Flags of North and South America | 0 | - | 4.99 | 366,872 |
| 10 Biggest American Countries by Area | 0 | - | 4.95 | 112,139 |
| Top 10 Most Populous American Countries | 0 | - | 4.97 | 143,143 |
| Latin American Countries Map Quiz | 0 | - | 4.97 | 128,120 |
| History of Mexico | 0 | - | 4.58 | 15,228 |
| South America Map Quiz | 0 | - | 5.00 | 1,540,974 |
