| Countries of the Soviet Union | 0 | - | 4.98 | 193,930 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,288 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,658,923 |
| Prime Ministers of the UK | 0 | - | 4.96 | 435,027 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 424,047 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 379,754 |
| U.S. Vice Presidents | 0 | - | 4.41 | 135,099 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 108,028 |
| U.S. Presidents by Event | 0 | - | 4.58 | 33,613 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 93,066 |
| Presidential Middle Names | 0 | - | 4.41 | 59,751 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 52,801 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 93,888 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,193 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 190,060 |
| Play-Doh Presidents | 0 | - | 5.00 | 81,741 |
| 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 | 48,313 |
| Country by Photo of its Leader | 0 | - | 4.74 | 123,337 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,709 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,172 |
| First Ladies of the United States | 0 | - | 4.28 | 85,273 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,121 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 76,412 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,015 |
| Add a Letter - Make a U.S. President | 0 | - | 4.61 | 23,847 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,698 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 160,554 |
| Biggest Trading Partners – United Kingdom | 0 | - | 4.92 | 79,586 |
| Countries of Europe After World War II | 0 | - | 4.99 | 186,857 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 155,473 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 88,118 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 433,896 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,662 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 103,893 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,444 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 303,494 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 69,489 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,055 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,512 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,545 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,198 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,104 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 143,324 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,328 |
| Name the Popes Quiz | 0 | - | 4.47 | 137,256 |
| Countries of the Popes | 0 | - | 4.79 | 127,304 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,005 |
| African Countries with the Most Christians | 0 | - | 4.94 | 74,918 |
| 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 | 30,517 |
| 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 | 189,387 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,110 |
| Every European Country Shape | 0 | - | 4.96 | 200,358 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,573 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 642,531 |
| Name that Greek Letter | 0 | - | 4.94 | 321,836 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,448 |
| Name the English Monarchs | 0 | - | 4.92 | 498,429 |
| Vatican City Country Quiz | 0 | - | 4.53 | 44,041 |
| 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 | 94,841 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,187 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 132,056 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,664 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 70,842 |
| Olympian Gods Quiz | 0 | - | 4.96 | 496,829 |
| The Trojan War | 0 | - | 4.83 | 39,466 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,697 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 124,472 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,113 |
| Roman Emperors | 0 | - | 4.95 | 118,613 |
| Biggest Trading Partners - Spain | 0 | - | 4.92 | 53,528 |
| James Bond Countries Visited Map | 0 | - | 4.99 | 63,614 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 236,469 |
| Most-Visited Countries by Popes | 0 | - | 4.55 | 83,234 |
| Biggest Trading Partners - China | 0 | - | 4.95 | 74,713 |
| The Dictator Files: Chairman Mao | 0 | - | 4.28 | 20,585 |
| National Founders | 0 | - | 4.40 | 83,671 |
| Flags of WW1 | 0 | - | 4.60 | 37,995 |
| Colonies of Africa with a Map | 0 | - | 4.77 | 54,006 |
| 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 | 19,962 |
| U.S. Presidents True or False | 0 | - | 3.96 | 15,536 |
| 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 | 218,730 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 132,662 |
| Random European Countries on a Map | 0 | - | 4.97 | 282,144 |
| History of Russia Quiz | 0 | - | 4.49 | 31,801 |
| Countries of the German Empire | 0 | - | 4.51 | 37,689 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 72,630 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,325 |
| Ancient Greek Words | 0 | - | 4.92 | 110,792 |
| History of Italy | 0 | - | 4.55 | 31,841 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,496 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,000 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,567 |
| Tolkien's Middle Earth Map Quiz | 0 | - | 4.91 | 37,179 |
| 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 | 31,062 |
| 10 Plagues of Egypt | 0 | - | 4.41 | 53,318 |
| Communist Countries in History | 0 | - | 4.63 | 492,829 |
| History of India | 0 | - | 4.61 | 21,297 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.68 | 55,202 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 266,680 |
| History of South Africa | 0 | - | 4.60 | 17,611 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,765 |
| Win the U.S. Presidential Election | 0 | - | 4.80 | 619,329 |
| 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 | 4,734,203 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 526,626 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,773 |
| Random Sequential European Countries on a Map | 0 | - | 4.99 | 216,238 |
| Europe Map with Random Merged Countries | 0 | - | 4.97 | 315,922 |
| Save Europeans by Guessing Countries | 0 | - | 4.84 | 209,821 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 93,593 |
| 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 | 23,391 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,800 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,785 |
| Figures from Greek Mythology | 0 | - | 4.91 | 185,163 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,011 |
| Byzantine History | 0 | - | 4.91 | 28,648 |
| Count in Roman Numerals - 30 Second Sprint | 0 | - | 4.26 | 101,613 |
| The Vikings! | 0 | - | 4.46 | 28,253 |
| The Portuguese Empire | 0 | - | 4.54 | 11,999 |
| Arthurian Legend | 0 | - | 4.33 | 25,054 |
| Biggest British Empire Countries | 0 | - | 4.73 | 98,340 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,211 |
| Countries the UK Declared War On | 0 | - | 4.61 | 121,890 |
| Geography of the British Empire | 0 | - | 4.48 | 39,506 |
| Medieval English History | 0 | - | 4.53 | 43,334 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 277,259 |
| History of Iran | 0 | - | 4.65 | 16,280 |
| Prime Ministers of Israel | 0 | - | 3.97 | 17,828 |
| Vietnam War Countries | 0 | - | 4.83 | 93,670 |
| History of China | 0 | - | 4.37 | 56,735 |
| Political Movements by Country | 0 | - | 4.46 | 72,291 |
| Countries of Africa | 0 | - | 5.00 | 2,510,508 |
| Africa Cities Map Quiz | 0 | - | 4.97 | 98,473 |
| Flags of Africa Quiz | 0 | - | 5.00 | 464,055 |
| Africa Map Quiz | 0 | - | 5.00 | 2,105,595 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 45,895 |
| Top 10 Biggest African Countries by Area | 0 | - | 4.99 | 215,735 |
| 10 Southernmost Countries in Africa | 0 | - | 4.98 | 115,644 |
| 10 Northernmost Countries in Africa | 0 | - | 4.98 | 160,367 |
| Top 10 Smallest African Countries by Area | 0 | - | 4.96 | 32,558 |
| African East Coast | 0 | - | 4.96 | 95,139 |
| African Countries with the Shortest Names | 0 | - | 4.98 | 152,258 |
| Western Africa Map Quiz | 0 | - | 4.97 | 73,014 |
| Top African Languages on a Map | 0 | - | 4.92 | 72,599 |
| African Island Countries | 0 | - | 4.96 | 100,863 |
| Countries of Africa with an Empty Map | 0 | - | 5.00 | 241,834 |
| All First-Level Subdivisions of Africa on a Map | 0 | - | 4.92 | 32,775 |
| Oceania Map Quiz | 0 | - | 4.98 | 635,942 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 49,896 |
| Australian States and Territories | 0 | - | 4.96 | 140,992 |
| Australian Capitals | 0 | - | 4.92 | 62,598 |
| Australian Immigration by Country | 0 | - | 4.81 | 77,037 |
| Australia Map Quiz | 0 | - | 4.94 | 342,669 |
| Australia True or False | 0 | - | 4.87 | 56,540 |
| Flags of North and South America | 0 | - | 4.99 | 367,987 |
| 10 Biggest American Countries by Area | 0 | - | 4.95 | 112,190 |
| Top 10 Most Populous American Countries | 0 | - | 4.97 | 143,234 |
| Latin American Countries Map Quiz | 0 | - | 4.97 | 128,352 |
| History of Mexico | 0 | - | 4.58 | 15,237 |
| South America Map Quiz | 0 | - | 5.00 | 1,541,839 |
