| Prime Ministers of the UK | 0 | - | 4.96 | 434,492 |
| Biggest Trading Partners - China | 0 | - | 4.95 | 74,669 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,652,825 |
| Countries Bordering China Since 1914 | 0 | - | 4.93 | 94,702 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,673 |
| Paramount Leaders of China | 0 | - | 4.36 | 10,996 |
| The Dictator Files: Saddam Hussein | 0 | - | 4.48 | 15,752 |
| Country by Photo of its Leader | 0 | - | 4.74 | 123,224 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,028 |
| Soviet Leaders 1917–1991 | 0 | - | 4.43 | 94,410 |
| Name the Popes Quiz | 0 | - | 4.47 | 137,110 |
| Countries of the Popes | 0 | - | 4.79 | 127,174 |
| China by Picture | 0 | - | 4.51 | 62,520 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 423,587 |
| Top 10 Oldest African Countries | 0 | - | 4.88 | 27,433 |
| Cities of China (With Some Help) | 0 | - | 4.91 | 31,273 |
| 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 | 33,448 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 92,984 |
| Presidential Middle Names | 0 | - | 4.41 | 59,688 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 379,500 |
| 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 | 189,780 |
| Play-Doh Presidents | 0 | - | 5.00 | 81,655 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 433,428 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,608 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 103,847 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 105,839 |
| African Countries with the Most Christians | 0 | - | 4.94 | 74,844 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,287 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,507 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,730 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 148,898 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,384 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,348 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,074 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 55,985 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,513 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,305 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,218 |
| "Stan" Countries - Map Quiz | 0 | - | 4.98 | 133,711 |
| Asian Countries with the Most Christians | 0 | - | 4.85 | 96,207 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.85 | 113,215 |
| Prime Ministers of Israel | 0 | - | 3.97 | 17,816 |
| Vietnam War Countries | 0 | - | 4.83 | 93,584 |
| China Cities Map Quiz | 0 | - | 4.93 | 104,003 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 80,650 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,374 |
| 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 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,220 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,681 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,129 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 641,723 |
| Name that Greek Letter | 0 | - | 4.94 | 321,597 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 60,341 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,118 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 85,466 |
| Name the English Monarchs | 0 | - | 4.92 | 497,764 |
| Every Asian Country Shape | 0 | - | 4.95 | 86,663 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,253 |
| Biggest Cities in China | 0 | - | 4.53 | 156,970 |
| National Founders | 0 | - | 4.40 | 83,643 |
| Biggest Trading Partners – Australia | 0 | - | 4.93 | 60,941 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,812 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.37 | 48,282 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,627 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 70,751 |
| 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 | 124,220 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,033 |
| Roman Emperors | 0 | - | 4.95 | 118,425 |
| Biggest Trading Partners - Spain | 0 | - | 4.91 | 53,502 |
| Biggest Trading Partners – United Kingdom | 0 | - | 4.92 | 79,486 |
| Pope Facts | 0 | - | 4.39 | 31,033 |
| Turkmenistan Country Quiz | 0 | - | 4.81 | 25,669 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 69,188 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 81,762 |
| All Cities in China with Population of 1 Million | 0 | - | 4.80 | 45,327 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 88,405 |
| Colonies of Africa with a Map | 0 | - | 4.77 | 53,928 |
| The Dictator Files: Fidel Castro | 0 | - | 4.19 | 12,255 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 28,457 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 303,319 |
| 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 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 69,382 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,770 |
| The American Revolution | 0 | - | 4.52 | 54,049 |
| Category Elimination - U.S. States #1 | 0 | - | 4.87 | 218,469 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 132,447 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 526,252 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 160,434 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 88,012 |
| History of Russia Quiz | 0 | - | 4.49 | 31,787 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 72,422 |
| Olympian Gods Quiz | 0 | - | 4.96 | 495,824 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,294 |
| Ancient Greek Words | 0 | - | 4.92 | 110,650 |
| History of Italy | 0 | - | 4.55 | 31,809 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,477 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 76,975 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,379 |
| Tolkien's Middle Earth Map Quiz | 0 | - | 4.91 | 37,092 |
| Countries of Asia in 1900 | 0 | - | 4.50 | 57,609 |
| Random Asian Countries on a Map | 0 | - | 4.90 | 168,722 |
| 10 Plagues of Egypt | 0 | - | 4.39 | 51,014 |
| Flags of Countries that Border China | 0 | - | 4.94 | 98,515 |
| Japan by Picture | 0 | - | 4.45 | 29,034 |
| History of India | 0 | - | 4.61 | 21,278 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 266,479 |
| History of South Africa | 0 | - | 4.60 | 17,599 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 28,878 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.49 | 11,669 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 128,667 |
| Europe Map Quiz | 0 | - | 5.00 | 4,730,226 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,737 |
| Least Forested Countries in Asia | 0 | - | 4.74 | 64,409 |
| Save Europeans by Guessing Countries | 0 | - | 4.84 | 209,341 |
| Countries of Europe After World War II | 0 | - | 4.99 | 186,677 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 155,311 |
| Countries of the Soviet Union | 0 | - | 4.98 | 193,799 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 93,528 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,219 |
| History of Austria | 0 | - | 4.70 | 17,743 |
| Geography of the French Empire | 0 | - | 4.48 | 26,923 |
| The French Revolution | 0 | - | 4.46 | 23,774 |
| History of France | 0 | - | 4.59 | 55,990 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,382 |
| Figures from Greek Mythology | 0 | - | 4.91 | 184,877 |
| 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 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,167 |
| Countries the UK Declared War On | 0 | - | 4.61 | 121,753 |
| Geography of the British Empire | 0 | - | 4.48 | 39,467 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 277,073 |
| Random Sequential Asian Countries on a Map | 0 | - | 4.99 | 118,240 |
| History of Iran | 0 | - | 4.65 | 16,269 |
| History of China | 0 | - | 4.37 | 56,682 |
| Communist Countries in History | 0 | - | 4.63 | 492,407 |
| Political Movements by Country | 0 | - | 4.46 | 72,254 |
| George Washington... or George W. Bush? | 0 | - | 4.16 | 12,210 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.68 | 55,159 |
| Modern Day Countries of the Mughal Empire on a Map | 0 | - | 4.42 | 33,214 |
| Countries of Africa | 0 | - | 5.00 | 2,506,869 |
| Africa Map Quiz | 0 | - | 5.00 | 2,103,872 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 45,787 |
| African East Coast | 0 | - | 4.96 | 95,014 |
| Western Africa Map Quiz | 0 | - | 4.97 | 72,899 |
| Oceania Map Quiz | 0 | - | 4.98 | 635,119 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 49,773 |
| Australian Capitals | 0 | - | 4.92 | 62,592 |
| Australia Map Quiz | 0 | - | 4.94 | 342,420 |
| History of Mexico | 0 | - | 4.58 | 15,228 |
| United States Map Quiz | 0 | - | 4.98 | 4,141,251 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,732 |
| U.S. States by Governor | 0 | - | 4.43 | 17,979 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,570 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,545 |
| Red State or Blue State Trait? | 0 | - | 4.42 | 54,924 |
| Win the U.S. Presidential Election | 0 | - | 4.80 | 618,197 |
| 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 | 40,441 |
| 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 |
| U.S. Presidents by Picture - Multiple Choice | 0 | - | 4.49 | 28,585 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,690 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 32,987 |
| U.S. History for Dummies | 0 | - | 4.47 | 82,464 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 210,061 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,187 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,088 |
| Countries That Use the Euro | 0 | - | 4.96 | 102,915 |
| Count to 10 in Europe: Pro | 0 | - | 4.85 | 68,568 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 362,249 |
| Official European Union Languages | 0 | - | 4.97 | 236,474 |
| European Countries in their Native Language | 0 | - | 4.99 | 156,676 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,525 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 113,488 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 425,088 |
| The Only European Country ... | 0 | - | 4.91 | 213,738 |
| European Countries NOT in NATO | 0 | - | 4.87 | 59,472 |
