| Countries of the Soviet Union | 0 | - | 4.98 | 195,528 |
| Soviet Union Country Quiz | 0 | - | 4.91 | 81,135 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,724,720 |
| Prime Ministers of the UK | 0 | - | 4.95 | 442,164 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 428,426 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 383,523 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 109,542 |
| U.S. Presidents by Event | 0 | - | 4.58 | 35,290 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.62 | 94,611 |
| Presidential Middle Names | 0 | - | 4.41 | 60,711 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,678 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,888 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,627 |
| Name a Valid U.S. President #1 | 0 | - | 4.90 | 193,735 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,846 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.42 | 24,064 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 35,192 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.37 | 48,643 |
| Country by Photo of its Leader | 0 | - | 4.70 | 124,611 |
| Prime Ministers of Australia | 0 | - | 4.51 | 32,190 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,956 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,359 |
| U.S. Presidential Running Mates | 0 | - | 4.41 | 28,765 |
| First Ladies of the United States | 0 | - | 4.28 | 85,943 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,311 |
| U.S. Presidents in Order by First Letter | 0 | - | 4.32 | 77,460 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,358 |
| Add a Letter - Make a U.S. President | 0 | - | 4.58 | 24,093 |
| Win the 1828 U.S. Presidential Election | 0 | - | 4.31 | 58,546 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,941 |
| Neutral European Countries of WWII | 0 | - | 4.92 | 162,258 |
| Biggest Trading Partners – United Kingdom | 0 | - | 4.93 | 80,947 |
| Countries of Europe After World War II | 0 | - | 4.99 | 189,325 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 157,396 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 89,703 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 439,663 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,493 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 104,555 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,797 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 306,169 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 70,564 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,328 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 85,281 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,717 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,806 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,538 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,428 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 145,627 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,566 |
| Name the Popes Quiz | 0 | - | 4.47 | 138,889 |
| Countries of the Popes | 0 | - | 4.79 | 128,708 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 73,089 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,593 |
| The George Washington Presidency | 0 | - | 4.03 | 14,605 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,778 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,749 |
| The John Adams Presidency | 0 | - | 4.12 | 8,787 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,984 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,776 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,378 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,756 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,924 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,740 |
| Canadian Prime Ministers | 0 | - | 4.64 | 57,905 |
| Every European Country Shape | 0 | - | 4.96 | 202,945 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 651,693 |
| Name that Greek Letter | 0 | - | 4.93 | 324,917 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 61,637 |
| Countries of Iberia in History with a Map | 0 | - | 4.88 | 42,364 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,851 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,702 |
| Name the English Monarchs | 0 | - | 4.91 | 506,227 |
| Vatican City Country Quiz | 0 | - | 4.53 | 44,652 |
| Asian Countries with the Most Christians | 0 | - | 4.86 | 97,946 |
| Paramount Leaders of China | 0 | - | 4.36 | 11,129 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,485 |
| African Countries with the Most Christians | 0 | - | 4.94 | 76,080 |
| Biggest Trading Partners – Australia | 0 | - | 4.93 | 61,985 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,607 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,275 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,915 |
| U.S. President Scramble | 0 | - | 4.40 | 117,450 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,341 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,805 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 48,079 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 97,069 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,742 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 134,164 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,926 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 71,992 |
| Olympian Gods Quiz | 0 | - | 4.96 | 503,626 |
| The Trojan War | 0 | - | 4.83 | 39,975 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,905 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 127,477 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,574 |
| Roman Emperors | 0 | - | 4.95 | 121,151 |
| Biggest Trading Partners - Spain | 0 | - | 4.92 | 53,978 |
| James Bond Countries Visited Map | 0 | - | 4.99 | 64,720 |
| Commonwealth of Nations Countries | 0 | - | 4.95 | 238,243 |
| Most-Visited Countries by Popes | 0 | - | 4.56 | 84,143 |
| Biggest Trading Partners - China | 0 | - | 4.95 | 75,499 |
| The Dictator Files: Chairman Mao | 0 | - | 4.28 | 20,749 |
| National Founders | 0 | - | 4.40 | 83,970 |
| Flags of WW1 | 0 | - | 4.60 | 38,677 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,143 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,861 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 20,146 |
| U.S. Presidents True or False | 0 | - | 3.96 | 15,646 |
| Random U.S. Presidents by Picture | 0 | - | 4.40 | 66,594 |
| The Kennedy Family | 0 | - | 3.90 | 14,100 |
| The American Revolution | 0 | - | 4.52 | 54,355 |
| Category Elimination - U.S. States #1 | 0 | - | 4.88 | 222,397 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 135,550 |
| Random European Countries on a Map | 0 | - | 4.97 | 285,007 |
| Europe Map with Random Merged Countries | 0 | - | 4.97 | 320,435 |
| History of Russia Quiz | 0 | - | 4.47 | 32,000 |
| Countries of the German Empire | 0 | - | 4.51 | 38,171 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 75,286 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,846 |
| Ancient Greek Words | 0 | - | 4.93 | 112,426 |
| History of Italy | 0 | - | 4.55 | 32,142 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,815 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,418 |
| Invasions of Great Britain | 0 | - | 4.51 | 60,088 |
| Tolkien's Middle Earth Map Quiz | 0 | - | 4.92 | 38,184 |
| Top 100 UK Baby Girls' Names in 1850 | 0 | - | 4.32 | 62,565 |
| Countries Most-Visited By Queen Elizabeth II | 0 | - | 4.42 | 51,964 |
| People in Pictures with Queen Elizabeth II | 0 | - | 4.38 | 29,461 |
| Countries "Ruled" by King Charles III | 0 | - | 4.78 | 82,856 |
| Pope Facts | 0 | - | 4.39 | 31,381 |
| 10 Plagues of Egypt | 0 | - | 4.41 | 53,910 |
| Colonies of Africa with a Map | 0 | - | 4.79 | 54,744 |
| Communist Countries in History | 0 | - | 4.63 | 498,076 |
| History of South Africa | 0 | - | 4.60 | 17,762 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 80,139 |
| Win the U.S. Presidential Election | 0 | - | 4.78 | 635,436 |
| The Bill Clinton Presidency | 0 | - | 4.24 | 31,534 |
| The George H. W. Bush Presidency | 0 | - | 4.36 | 21,550 |
| The Ronald Reagan Presidency | 0 | - | 4.26 | 24,891 |
| The Barack Obama Presidency | 0 | - | 4.14 | 25,500 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 129,622 |
| Biggest European Cities by Letter | 0 | - | 4.55 | 127,315 |
| Europe Map Quiz | 0 | - | 5.00 | 4,786,913 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 532,383 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 35,178 |
| Random Sequential European Countries on a Map | 0 | - | 4.99 | 218,007 |
| Save Europeans by Guessing Countries | 0 | - | 4.86 | 216,578 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 94,410 |
| History of Austria | 0 | - | 4.70 | 17,971 |
| Geography of the French Empire | 0 | - | 4.45 | 27,214 |
| The French Revolution | 0 | - | 4.47 | 24,145 |
| History of France | 0 | - | 4.61 | 57,585 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,558 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,223 |
| Geography of Ancient Greece | 0 | - | 4.69 | 32,038 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 20,959 |
| Figures from Greek Mythology | 0 | - | 4.91 | 188,765 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,639 |
| Byzantine History | 0 | - | 4.91 | 29,018 |
| Byzantine Emperors | 0 | - | 4.93 | 14,582 |
| Count in Roman Numerals - 30 Second Sprint | 0 | - | 4.27 | 103,879 |
| The Vikings! | 0 | - | 4.46 | 28,401 |
| The Portuguese Empire | 0 | - | 4.58 | 12,104 |
| Arthurian Legend | 0 | - | 4.33 | 25,173 |
| Biggest British Empire Countries | 0 | - | 4.74 | 100,476 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,455 |
| Countries the UK Declared War On | 0 | - | 4.55 | 123,227 |
| Geography of the British Empire | 0 | - | 4.48 | 39,844 |
| Medieval English History | 0 | - | 4.53 | 43,650 |
| Asian Countries by First 2 Letters | 0 | - | 4.92 | 280,618 |
| History of Iran | 0 | - | 4.66 | 16,420 |
| Prime Ministers of Israel | 0 | - | 3.97 | 18,064 |
| Vietnam War Countries | 0 | - | 4.82 | 94,592 |
| History of China | 0 | - | 4.35 | 57,569 |
| History of India | 0 | - | 4.62 | 21,510 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.69 | 55,650 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 269,308 |
| Political Movements by Country | 0 | - | 4.46 | 72,762 |
| Oceania Map Quiz | 0 | - | 4.98 | 659,145 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.96 | 51,434 |
| Australian States and Territories | 0 | - | 4.96 | 142,817 |
| Australian Capitals | 0 | - | 4.92 | 62,827 |
| Australian Immigration by Country | 0 | - | 4.81 | 77,493 |
| Australia Map Quiz | 0 | - | 4.95 | 346,095 |
| Australia True or False | 0 | - | 4.87 | 57,132 |
| Flags of North and South America | 0 | - | 4.99 | 376,749 |
| 10 Biggest American Countries by Area | 0 | - | 4.95 | 112,942 |
| Top 10 Most Populous American Countries | 0 | - | 4.96 | 144,769 |
| Latin American Countries Map Quiz | 0 | - | 4.98 | 130,617 |
| History of Mexico | 0 | - | 4.52 | 15,362 |
| South America Map Quiz | 0 | - | 5.00 | 1,556,389 |
| Uruguay Country Quiz | 0 | - | 4.84 | 31,746 |
| Central America and Caribbean Map Quiz | 0 | - | 4.90 | 904,928 |
| The Dictator Files: Fidel Castro | 0 | - | 4.19 | 12,391 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,030,995 |
| North America Map Quiz | 0 | - | 4.98 | 251,916 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,967 |
| United States Map Quiz | 0 | - | 4.98 | 4,170,827 |
| Arms Exports - United States | 0 | - | 4.77 | 62,719 |
| U.S. States by Governor | 0 | - | 4.43 | 18,111 |
