| Prime Ministers of the UK | 0 | - | 4.96 | 434,647 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,680 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,041 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.85 | 113,248 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,654,433 |
| Paramount Leaders of China | 0 | - | 4.36 | 10,998 |
| Country by Photo of its Leader | 0 | - | 4.74 | 123,264 |
| The Dictator Files: Chairman Mao | 0 | - | 4.28 | 20,574 |
| Soviet Leaders 1917–1991 | 0 | - | 4.43 | 94,433 |
| Biggest Trading Partners - China | 0 | - | 4.95 | 74,681 |
| National Founders | 0 | - | 4.40 | 83,649 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 423,742 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 379,572 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,617 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,328 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 189,858 |
| Play-Doh Presidents | 0 | - | 5.00 | 81,676 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 148,948 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,424 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,418 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,112 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,021 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,637 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,520 |
| "Stan" Countries - Map Quiz | 0 | - | 4.98 | 133,774 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 103,861 |
| Political Movements by Country | 0 | - | 4.46 | 72,260 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 105,899 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 80,679 |
| African Countries with the Most Christians | 0 | - | 4.94 | 74,863 |
| Top 10 Richest Countries in Africa | 0 | - | 4.85 | 75,176 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 119,364 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,737 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 28,882 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,526 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.49 | 11,670 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,256 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,147 |
| Top 10 Richest Countries in Europe | 0 | - | 4.91 | 148,152 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 197,261 |
| Biggest Trading Partners - European Union | 0 | - | 4.91 | 72,110 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 88,972 |
| Countries Italy Declared War On | 0 | - | 4.75 | 42,952 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,282 |
| Name the English Monarchs | 0 | - | 4.92 | 497,904 |
| Name the Popes Quiz | 0 | - | 4.47 | 137,158 |
| Countries of the Popes | 0 | - | 4.79 | 127,218 |
| Every Asian Country Shape | 0 | - | 4.95 | 86,704 |
| Asian Countries with the Most Christians | 0 | - | 4.85 | 96,268 |
| Top 10 Richest Countries in Asia | 0 | - | 4.73 | 104,799 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,277 |
| Prime Ministers of Israel | 0 | - | 3.97 | 17,820 |
| Hindu Countries | 0 | - | 4.85 | 49,580 |
| Biggest Trading Partners – Australia | 0 | - | 4.93 | 60,955 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,376 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.37 | 48,288 |
| The Trojan War | 0 | - | 4.83 | 39,428 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 641,921 |
| Name that Greek Letter | 0 | - | 4.94 | 321,671 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,538 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,046 |
| Roman Emperors | 0 | - | 4.95 | 118,491 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 69,217 |
| Biggest Trading Partners - Turkey | 0 | - | 4.80 | 50,179 |
| World Capitals Closest to Bangkok | 0 | - | 4.91 | 40,800 |
| Countries Bordering China Since 1914 | 0 | - | 4.93 | 94,733 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 88,447 |
| Countries with the Most Hindus | 0 | - | 4.90 | 122,353 |
| Colonies of Africa with a Map | 0 | - | 4.77 | 53,945 |
| Biggest Trading Partners - Colombia | 0 | - | 4.88 | 39,976 |
| U.S. Vice Presidents | 0 | - | 4.41 | 134,941 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 107,949 |
| U.S. Presidents by Event | 0 | - | 4.58 | 33,500 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 93,001 |
| Presidential Middle Names | 0 | - | 4.41 | 59,702 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 52,738 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 93,819 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,745 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,172 |
| The American Revolution | 0 | - | 4.52 | 54,057 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 526,353 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 160,469 |
| History of Russia Quiz | 0 | - | 4.49 | 31,794 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,676 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 70,777 |
| Olympian Gods Quiz | 0 | - | 4.96 | 496,135 |
| Ancient Greek Words | 0 | - | 4.92 | 110,694 |
| 101 Figures from Greek Mythology | 0 | - | 5.00 | 124,288 |
| History of Italy | 0 | - | 4.55 | 31,815 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,313 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,482 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 76,981 |
| Countries Closest to Spain A-Z | 0 | - | 4.99 | 107,679 |
| Biggest Trading Partners - Spain | 0 | - | 4.91 | 53,505 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,388 |
| Biggest Trading Partners – United Kingdom | 0 | - | 4.92 | 79,515 |
| Countries Closest to the United Kingdom A-Z | 0 | - | 4.96 | 189,916 |
| All UK Parliament Constituencies on a Map | 0 | - | 4.60 | 28,541 |
| Countries of Asia in 1900 | 0 | - | 4.50 | 57,622 |
| Turkmenistan Country Quiz | 0 | - | 4.81 | 25,682 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 81,812 |
| Singapore Airlines Destinations on a Map | 0 | - | 4.96 | 24,086 |
| Flags of Countries that Border China | 0 | - | 4.94 | 98,545 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 266,533 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 303,377 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 69,420 |
| Category Elimination - U.S. States #1 | 0 | - | 4.87 | 218,551 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 132,508 |
| Europe Map Quiz | 0 | - | 5.00 | 4,731,352 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,745 |
| Save Europeans by Guessing Countries | 0 | - | 4.84 | 209,482 |
| Countries of Europe After World War II | 0 | - | 4.99 | 186,740 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 155,354 |
| Countries of the Soviet Union | 0 | - | 4.98 | 193,837 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 72,467 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 433,548 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,394 |
| Pope Facts | 0 | - | 4.39 | 31,040 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 277,103 |
| Random Asian Countries on a Map | 0 | - | 4.90 | 168,767 |
| The Vietnam War | 0 | - | 4.43 | 35,294 |
| Communist Countries in History | 0 | - | 4.63 | 492,518 |
| History of India | 0 | - | 4.61 | 21,285 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.68 | 55,177 |
| Africa Map Quiz | 0 | - | 5.00 | 2,104,309 |
| African Countries with the Most Muslims | 0 | - | 4.80 | 100,411 |
| History of South Africa | 0 | - | 4.60 | 17,602 |
| Oceania Map Quiz | 0 | - | 4.98 | 635,311 |
| Australian Capitals | 0 | - | 4.92 | 62,593 |
| History of Mexico | 0 | - | 4.58 | 15,230 |
| United States Map Quiz | 0 | - | 4.98 | 4,141,846 |
| American Political Words | 0 | - | 4.39 | 23,341 |
| U.S. Political Figures by Picture #1 | 0 | - | 4.14 | 26,073 |
| U.S. Political Figures by Picture #2 | 0 | - | 4.10 | 15,462 |
| Female Political Figures by Picture - U.S. | 0 | - | 4.20 | 10,807 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,166 |
| First Ladies of the United States | 0 | - | 4.28 | 85,245 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,815 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,111 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 76,284 |
| U.S. President Scramble | 0 | - | 4.40 | 116,202 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,002 |
| Add a Letter - Make a U.S. President | 0 | - | 4.61 | 23,833 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,023 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,695 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,687 |
| Count to 10 in Europe: Pro | 0 | - | 4.85 | 68,581 |
| Official European Union Languages | 0 | - | 4.97 | 236,530 |
| European Countries in their Native Language | 0 | - | 4.99 | 156,701 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 425,202 |
| Least Forested Countries in Asia | 0 | - | 4.74 | 64,420 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 93,548 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,240 |
| History of Austria | 0 | - | 4.70 | 17,747 |
| Geography of the French Empire | 0 | - | 4.48 | 26,934 |
| The French Revolution | 0 | - | 4.46 | 23,785 |
| History of France | 0 | - | 4.59 | 56,046 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,383 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 26,932 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,775 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,771 |
| Mythology A-Z | 0 | - | 4.31 | 36,999 |
| Figures from Greek Mythology | 0 | - | 4.91 | 184,950 |
| Countries in the Byzantine Empire | 0 | - | 4.95 | 71,733 |
| Byzantine History | 0 | - | 4.91 | 28,620 |
| Count in Roman Numerals - 30 Second Sprint | 0 | - | 4.26 | 101,473 |
| History of The Netherlands | 0 | - | 4.46 | 17,311 |
| The Vikings! | 0 | - | 4.45 | 28,245 |
| The Portuguese Empire | 0 | - | 4.54 | 11,990 |
| Arthurian Legend | 0 | - | 4.33 | 25,050 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,174 |
| Countries the UK Declared War On | 0 | - | 4.61 | 121,779 |
| Geography of the British Empire | 0 | - | 4.48 | 39,472 |
| Medieval English History | 0 | - | 4.53 | 43,319 |
| Places Where Winston Churchill Said We Would Fight the Nazis | 0 | - | 4.57 | 14,545 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,440,472 |
| Asia Map Quiz | 0 | - | 4.99 | 907,031 |
| Most Guessed Asian Capitals | 0 | - | 4.51 | 65,782 |
| Top 10 Most Forested Countries in Asia | 0 | - | 4.63 | 63,182 |
| Random Sequential Asian Countries on a Map | 0 | - | 4.99 | 118,271 |
| History of Iran | 0 | - | 4.65 | 16,272 |
| The Iraq War | 0 | - | 4.47 | 15,552 |
| Ottoman Empire Quiz | 0 | - | 4.42 | 17,025 |
| Vietnam War Countries | 0 | - | 4.83 | 93,609 |
| Chinese Inventions | 0 | - | 4.30 | 33,719 |
| History of China | 0 | - | 4.37 | 56,691 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,007 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,167 |
| Countries by Founding Story | 0 | - | 4.95 | 76,535 |
| Independence from Whom | 0 | - | 4.99 | 209,685 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 130,743 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 61,997 |
| Modern Day Countries of the Mughal Empire on a Map | 0 | - | 4.42 | 33,225 |
| Countries of Africa | 0 | - | 5.00 | 2,507,870 |
| Africa Cities Map Quiz | 0 | - | 4.97 | 98,434 |
| Flags of Africa Quiz | 0 | - | 5.00 | 463,395 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 45,814 |
| Top 10 Biggest African Countries by Area | 0 | - | 4.99 | 215,628 |
| 10 Southernmost Countries in Africa | 0 | - | 4.98 | 115,576 |
| 10 Northernmost Countries in Africa | 0 | - | 4.98 | 160,275 |
