| Prime Ministers of the UK | 0 | - | 4.96 | 434,434 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,659 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,013 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.85 | 113,197 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,651,997 |
| Name the English Monarchs | 0 | - | 4.92 | 497,689 |
| Paramount Leaders of China | 0 | - | 4.36 | 10,996 |
| Countries in the Byzantine Empire | 0 | - | 4.95 | 71,709 |
| The Dictator Files: Chairman Mao | 0 | - | 4.28 | 20,569 |
| Country by Photo of its Leader | 0 | - | 4.74 | 123,208 |
| Soviet Leaders 1917–1991 | 0 | - | 4.43 | 94,397 |
| Biggest Trading Partners - China | 0 | - | 4.95 | 74,662 |
| National Founders | 0 | - | 4.40 | 83,639 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 423,502 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 379,471 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,594 |
| Prime Ministers of Israel | 0 | - | 3.97 | 17,812 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,267 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 189,738 |
| Play-Doh Presidents | 0 | - | 5.00 | 81,647 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 148,868 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,364 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,329 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,055 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 55,968 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,624 |
| "Stan" Countries - Map Quiz | 0 | - | 4.98 | 133,682 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 103,841 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 105,812 |
| African Countries with the Most Christians | 0 | - | 4.94 | 74,826 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 119,331 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,725 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,505 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 197,175 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,506 |
| Countries Italy Declared War On | 0 | - | 4.75 | 42,928 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,194 |
| Name the Popes Quiz | 0 | - | 4.47 | 137,082 |
| Countries of the Popes | 0 | - | 4.79 | 127,154 |
| Asian Countries with the Most Christians | 0 | - | 4.85 | 96,162 |
| Top 10 Richest Countries in Asia | 0 | - | 4.73 | 104,752 |
| Political Movements by Country | 0 | - | 4.46 | 72,247 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 80,637 |
| Hindu Countries | 0 | - | 4.85 | 49,524 |
| Top 10 Richest Countries in Africa | 0 | - | 4.85 | 75,148 |
| Biggest Trading Partners – Australia | 0 | - | 4.93 | 60,928 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 28,877 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,371 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.49 | 11,669 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,196 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,123 |
| Top 10 Richest Countries in Europe | 0 | - | 4.91 | 148,101 |
| Biggest Trading Partners - European Union | 0 | - | 4.91 | 72,081 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 88,925 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.37 | 48,274 |
| The Trojan War | 0 | - | 4.83 | 39,419 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 641,588 |
| Name that Greek Letter | 0 | - | 4.94 | 321,533 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,479 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,021 |
| Roman Emperors | 0 | - | 4.95 | 118,399 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,287 |
| Every Asian Country Shape | 0 | - | 4.95 | 86,621 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 69,176 |
| The Iraq War | 0 | - | 4.47 | 15,547 |
| Biggest Trading Partners - Turkey | 0 | - | 4.80 | 50,157 |
| Biggest Cities once in the Ottoman Empire | 0 | - | 4.75 | 43,710 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,239 |
| Countries Bordering China Since 1914 | 0 | - | 4.93 | 94,692 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 88,382 |
| Countries with the Most Hindus | 0 | - | 4.90 | 122,283 |
| Biggest Trading Partners - Colombia | 0 | - | 4.88 | 39,968 |
| U.S. Vice Presidents | 0 | - | 4.41 | 134,863 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 107,906 |
| U.S. Presidents by Event | 0 | - | 4.58 | 33,429 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 92,967 |
| Presidential Middle Names | 0 | - | 4.41 | 59,674 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 52,701 |
| Assassinated U.S. Presidents | 0 | - | 4.61 | 93,785 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,726 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,155 |
| The American Revolution | 0 | - | 4.52 | 54,045 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 160,417 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,663 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 70,737 |
| Olympian Gods Quiz | 0 | - | 4.96 | 495,606 |
| Ancient Greek Words | 0 | - | 4.92 | 110,631 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 124,183 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,301 |
| Countries Closest to Spain A-Z | 0 | - | 4.99 | 107,640 |
| Biggest Trading Partners - Spain | 0 | - | 4.91 | 53,495 |
| Members of the British Royal Family | 0 | - | 4.10 | 113,788 |
| Biggest Trading Partners – United Kingdom | 0 | - | 4.92 | 79,467 |
| Countries Closest to the United Kingdom A-Z | 0 | - | 4.96 | 189,852 |
| Turkmenistan Country Quiz | 0 | - | 4.81 | 25,662 |
| World Capitals Closest to Jerusalem | 0 | - | 4.47 | 44,811 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 81,747 |
| Countries Closest to Israel | 0 | - | 4.67 | 105,207 |
| Flags of Countries that Border China | 0 | - | 4.94 | 98,501 |
| Colonies of Africa with a Map | 0 | - | 4.77 | 53,923 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,161 |
| First Ladies of the United States | 0 | - | 4.28 | 85,224 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,107 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 76,235 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 303,304 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 15,995 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 69,371 |
| Add a Letter - Make a U.S. President | 0 | - | 4.61 | 23,825 |
| Category Elimination - U.S. States #1 | 0 | - | 4.87 | 218,366 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 132,409 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,678 |
| Europe Map Quiz | 0 | - | 5.00 | 4,729,671 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 526,212 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,734 |
| Countries of Europe After World War II | 0 | - | 4.99 | 186,648 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 155,292 |
| History of Russia Quiz | 0 | - | 4.49 | 31,784 |
| Countries of the Soviet Union | 0 | - | 4.98 | 193,779 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 26,922 |
| History of Italy | 0 | - | 4.55 | 31,806 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 433,350 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,474 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 76,974 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,374 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,387 |
| English Royal Consorts | 0 | - | 4.37 | 37,151 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,598 |
| The Reign of Queen Elizabeth II | 0 | - | 4.35 | 35,670 |
| All UK Parliament Constituencies on a Map | 0 | - | 4.60 | 28,532 |
| Pope Facts | 0 | - | 4.39 | 31,029 |
| Countries of Asia in 1900 | 0 | - | 4.50 | 57,604 |
| Random Asian Countries on a Map | 0 | - | 4.90 | 168,705 |
| The Persian Gulf War | 0 | - | 4.02 | 8,399 |
| 10 Plagues of Egypt | 0 | - | 4.41 | 49,951 |
| The Vietnam War | 0 | - | 4.43 | 35,286 |
| Communist Countries in History | 0 | - | 4.63 | 492,331 |
| History of India | 0 | - | 4.61 | 21,272 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.68 | 55,151 |
| Africa Map Quiz | 0 | - | 5.00 | 2,103,645 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 266,443 |
| African Countries with the Most Muslims | 0 | - | 4.80 | 100,387 |
| History of South Africa | 0 | - | 4.60 | 17,599 |
| Oceania Map Quiz | 0 | - | 4.98 | 634,959 |
| Australian Capitals | 0 | - | 4.92 | 62,589 |
| History of Mexico | 0 | - | 4.58 | 15,227 |
| United States Map Quiz | 0 | - | 4.98 | 4,140,903 |
| American Political Words | 0 | - | 4.39 | 23,333 |
| U.S. Political Figures by Picture #1 | 0 | - | 4.14 | 26,072 |
| U.S. Political Figures by Picture #2 | 0 | - | 4.10 | 15,460 |
| Female Political Figures by Picture - U.S. | 0 | - | 4.20 | 10,806 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,359 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,084 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,811 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,439 |
| U.S. President Scramble | 0 | - | 4.40 | 116,174 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,014 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,688 |
| Count to 10 in Europe: Pro | 0 | - | 4.85 | 68,557 |
| Official European Union Languages | 0 | - | 4.97 | 236,455 |
| European Countries in their Native Language | 0 | - | 4.99 | 156,653 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 425,039 |
| Least Forested Countries in Asia | 0 | - | 4.74 | 64,404 |
| Save Europeans by Guessing Countries | 0 | - | 4.84 | 209,278 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 93,517 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,210 |
| History of Austria | 0 | - | 4.70 | 17,742 |
| Geography of the French Empire | 0 | - | 4.48 | 26,922 |
| The French Revolution | 0 | - | 4.46 | 23,769 |
| History of France | 0 | - | 4.59 | 55,964 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,379 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,759 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,765 |
| Mythology A-Z | 0 | - | 4.31 | 36,981 |
| Figures from Greek Mythology | 0 | - | 4.91 | 184,836 |
| Byzantine History | 0 | - | 4.91 | 28,603 |
| Count in Roman Numerals - 30 Second Sprint | 0 | - | 4.26 | 101,415 |
| History of The Netherlands | 0 | - | 4.46 | 17,305 |
| The Vikings! | 0 | - | 4.45 | 28,237 |
| The Portuguese Empire | 0 | - | 4.54 | 11,986 |
| Arthurian Legend | 0 | - | 4.33 | 25,049 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,164 |
| Countries the UK Declared War On | 0 | - | 4.61 | 121,739 |
| Geography of the British Empire | 0 | - | 4.48 | 39,467 |
| The Reign of Henry VIII | 0 | - | 4.25 | 27,601 |
| Medieval English History | 0 | - | 4.53 | 43,305 |
| Elizabeth I... or Elizabeth II? | 0 | - | 4.30 | 24,427 |
| The Reign of Queen Victoria | 0 | - | 4.33 | 23,336 |
| Places Where Winston Churchill Said We Would Fight the Nazis | 0 | - | 4.57 | 14,544 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,439,298 |
| Asia Map Quiz | 0 | - | 4.99 | 906,592 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 277,047 |
| Most Guessed Asian Capitals | 0 | - | 4.51 | 65,780 |
| Top 10 Most Forested Countries in Asia | 0 | - | 4.63 | 63,166 |
| Random Sequential Asian Countries on a Map | 0 | - | 4.99 | 118,224 |
| History of Iran | 0 | - | 4.65 | 16,262 |
| Biggest Cities in Turkey on a Map | 0 | - | 4.24 | 20,203 |
| Ottoman Empire Quiz | 0 | - | 4.46 | 17,016 |
| Israel Country Quiz | 0 | - | 3.89 | 74,643 |
| Vietnam War Countries | 0 | - | 4.83 | 93,578 |
| Chinese Inventions | 0 | - | 4.30 | 33,717 |
