| Prime Ministers of the UK | 0 | - | 4.96 | 436,371 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,770 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,250 |
| African Countries with the Most Christians | 0 | - | 4.94 | 75,130 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 119,715 |
| Top 10 Richest Countries in Africa | 0 | - | 4.85 | 75,478 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,671,897 |
| Country by Photo of its Leader | 0 | - | 4.74 | 123,578 |
| Soviet Leaders 1917–1991 | 0 | - | 4.43 | 94,643 |
| National Founders | 0 | - | 4.40 | 83,725 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 424,859 |
| Paramount Leaders of China | 0 | - | 4.36 | 11,023 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 380,275 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,721 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,810 |
| The Dictator Files: Chairman Mao | 0 | - | 4.28 | 20,612 |
| African Countries with the Most Muslims | 0 | - | 4.80 | 100,604 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,758 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 190,601 |
| Play-Doh Presidents | 0 | - | 5.00 | 81,905 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,473 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,803 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,906 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,446 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,320 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,706 |
| Political Movements by Country | 0 | - | 4.46 | 72,368 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,262 |
| Every African Country Shape | 0 | - | 4.90 | 86,538 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,834 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 28,958 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,660 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.49 | 11,695 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,685 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,281 |
| Top 10 Richest Countries in Europe | 0 | - | 4.90 | 148,702 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 197,977 |
| Biggest Trading Partners - European Union | 0 | - | 4.91 | 72,373 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 89,414 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,122 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 85,796 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,769 |
| Name the English Monarchs | 0 | - | 4.92 | 499,832 |
| Name the Popes Quiz | 0 | - | 4.47 | 137,520 |
| Countries of the Popes | 0 | - | 4.79 | 127,550 |
| Asian Countries with the Most Christians | 0 | - | 4.85 | 96,638 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.87 | 118,902 |
| Hindu Countries | 0 | - | 4.86 | 49,797 |
| Biggest Trading Partners - South Africa | 0 | - | 4.73 | 40,181 |
| Biggest Trading Partners – Australia | 0 | - | 4.93 | 61,189 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,417 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.37 | 48,381 |
| The Trojan War | 0 | - | 4.83 | 39,545 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 644,249 |
| Name that Greek Letter | 0 | - | 4.93 | 322,425 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,092 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,249 |
| Roman Emperors | 0 | - | 4.95 | 119,141 |
| Egypt Country Quiz | 0 | - | 4.82 | 77,220 |
| Countries with the Most Hindus | 0 | - | 4.90 | 122,593 |
| Africa Flags Map Quiz | 0 | - | 4.95 | 36,131 |
| Colonies of Africa with a Map | 0 | - | 4.77 | 54,163 |
| Random African Flag to Country | 0 | - | 4.88 | 74,474 |
| Biggest Trading Partners - Colombia | 0 | - | 4.88 | 40,100 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 108,227 |
| U.S. Presidents by Event | 0 | - | 4.58 | 33,880 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 93,295 |
| Presidential Middle Names | 0 | - | 4.41 | 59,902 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 52,955 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,167 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,843 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,267 |
| The American Revolution | 0 | - | 4.52 | 54,135 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 527,539 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 160,870 |
| History of Russia Quiz | 0 | - | 4.49 | 31,834 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,814 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 71,049 |
| Olympian Gods Quiz | 0 | - | 4.96 | 498,093 |
| Ancient Greek Words | 0 | - | 4.93 | 111,049 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 124,984 |
| History of Italy | 0 | - | 4.55 | 31,888 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,370 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,551 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,080 |
| Countries Closest to Spain A-Z | 0 | - | 4.99 | 107,911 |
| Biggest Trading Partners - Spain | 0 | - | 4.91 | 53,617 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,697 |
| Biggest Trading Partners – United Kingdom | 0 | - | 4.93 | 79,838 |
| Countries Closest to the United Kingdom A-Z | 0 | - | 4.96 | 190,293 |
| All UK Parliament Constituencies on a Map | 0 | - | 4.60 | 28,627 |
| Biggest Trading Partners - Turkey | 0 | - | 4.81 | 50,349 |
| Countries Closest to Egypt | 0 | - | 4.83 | 100,731 |
| Countries that Beat Egypt | 0 | - | 4.88 | 56,745 |
| Prime Ministers of Israel | 0 | - | 3.97 | 17,867 |
| Biggest Trading Partners - China | 0 | - | 4.95 | 74,830 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 267,294 |
| Random African Countries on a Map | 0 | - | 4.99 | 294,547 |
| Africa Map with Random Merged Countries | 0 | - | 4.95 | 72,977 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 304,081 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 69,646 |
| Category Elimination - U.S. States #1 | 0 | - | 4.88 | 219,413 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 133,166 |
| Europe Map Quiz | 0 | - | 5.00 | 4,743,835 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,832 |
| Save Europeans by Guessing Countries | 0 | - | 4.83 | 210,852 |
| Countries of Europe After World War II | 0 | - | 4.99 | 187,590 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 155,830 |
| Countries of the Soviet Union | 0 | - | 4.98 | 194,171 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 73,065 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 434,942 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,446 |
| Pope Facts | 0 | - | 4.39 | 31,124 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 278,065 |
| The Vietnam War | 0 | - | 4.43 | 35,384 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 104,023 |
| Communist Countries in History | 0 | - | 4.63 | 493,704 |
| History of India | 0 | - | 4.61 | 21,334 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.69 | 55,290 |
| Africa Map Quiz | 0 | - | 5.00 | 2,109,878 |
| Random Sequential African Countries on a Map | 0 | - | 5.00 | 127,105 |
| History of South Africa | 0 | - | 4.60 | 17,634 |
| Oceania Map Quiz | 0 | - | 4.98 | 638,084 |
| Australian Capitals | 0 | - | 4.92 | 62,647 |
| History of Mexico | 0 | - | 4.58 | 15,254 |
| United States Map Quiz | 0 | - | 4.98 | 4,147,532 |
| American Political Words | 0 | - | 4.39 | 23,374 |
| U.S. Political Figures by Picture #1 | 0 | - | 4.14 | 26,111 |
| U.S. Political Figures by Picture #2 | 0 | - | 4.10 | 15,488 |
| Female Political Figures by Picture - U.S. | 0 | - | 4.20 | 10,830 |
| U.S. Vice Presidents | 0 | - | 4.39 | 135,577 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,193 |
| First Ladies of the United States | 0 | - | 4.28 | 85,354 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,861 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,155 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 76,643 |
| U.S. President Scramble | 0 | - | 4.40 | 116,431 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,074 |
| Add a Letter - Make a U.S. President | 0 | - | 4.57 | 23,877 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,076 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,766 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,729 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 68,824 |
| Official European Union Languages | 0 | - | 4.97 | 237,570 |
| European Countries in their Native Language | 0 | - | 4.99 | 157,260 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 426,375 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 93,755 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,437 |
| History of Austria | 0 | - | 4.70 | 17,793 |
| Geography of the French Empire | 0 | - | 4.45 | 26,988 |
| The French Revolution | 0 | - | 4.46 | 23,854 |
| History of France | 0 | - | 4.59 | 56,550 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,421 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,079 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,858 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,830 |
| Mythology A-Z | 0 | - | 4.31 | 37,089 |
| Figures from Greek Mythology | 0 | - | 4.91 | 185,734 |
| Byzantine History | 0 | - | 4.91 | 28,689 |
| Count in Roman Numerals - 30 Second Sprint | 0 | - | 4.26 | 101,982 |
| History of The Netherlands | 0 | - | 4.46 | 17,352 |
| The Vikings! | 0 | - | 4.46 | 28,281 |
| The Portuguese Empire | 0 | - | 4.58 | 12,026 |
| Arthurian Legend | 0 | - | 4.33 | 25,074 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,257 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,065 |
| Geography of the British Empire | 0 | - | 4.48 | 39,569 |
| Medieval English History | 0 | - | 4.53 | 43,383 |
| Places Where Winston Churchill Said We Would Fight the Nazis | 0 | - | 4.57 | 14,576 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,443,645 |
| Asia Map Quiz | 0 | - | 4.99 | 910,378 |
| Top 10 Richest Countries in Asia | 0 | - | 4.73 | 105,175 |
| History of Iran | 0 | - | 4.66 | 16,299 |
| The Iraq War | 0 | - | 4.47 | 15,587 |
| Ottoman Empire Quiz | 0 | - | 4.42 | 17,070 |
| Chinese Inventions | 0 | - | 4.30 | 33,749 |
| History of China | 0 | - | 4.37 | 56,892 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,500 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,394 |
| Countries by Founding Story | 0 | - | 4.95 | 76,825 |
| Independence from Whom | 0 | - | 4.99 | 210,433 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,250 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,183 |
| Africa Capitals Quiz | 0 | - | 4.99 | 733,213 |
| Countries of Africa | 0 | - | 5.00 | 2,519,105 |
| Africa Cities Map Quiz | 0 | - | 4.97 | 98,614 |
| Flags of Africa Quiz | 0 | - | 5.00 | 466,367 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 46,207 |
| African Capitals by Map | 0 | - | 4.99 | 132,760 |
| Top 10 Biggest African Countries by Area | 0 | - | 4.99 | 216,134 |
| 10 Southernmost Countries in Africa | 0 | - | 4.98 | 115,846 |
| 10 Northernmost Countries in Africa | 0 | - | 4.98 | 160,628 |
| Top 10 Smallest African Countries by Area | 0 | - | 4.96 | 32,787 |
| African East Coast | 0 | - | 4.96 | 95,454 |
| African Countries with the Shortest Names | 0 | - | 4.98 | 152,677 |
| Western Africa Map Quiz | 0 | - | 4.97 | 73,315 |
| Top African Languages on a Map | 0 | - | 4.92 | 73,123 |
| African Island Countries | 0 | - | 4.96 | 101,106 |
| Countries of Africa with an Empty Map | 0 | - | 5.00 | 242,335 |
| All First-Level Subdivisions of Africa on a Map | 0 | - | 4.92 | 32,940 |
