| U.S. Presidents Quiz | 0 | - | 5.00 | 3,670,044 |
| Prime Ministers of the UK | 0 | - | 4.96 | 436,224 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 190,507 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,764 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,240 |
| Country by Photo of its Leader | 0 | - | 4.74 | 123,545 |
| Name the Popes Quiz | 0 | - | 4.47 | 137,487 |
| Countries of the Popes | 0 | - | 4.79 | 127,531 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 424,688 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 380,190 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 434,808 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,709 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 108,203 |
| U.S. Presidents by Event | 0 | - | 4.58 | 33,833 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 93,272 |
| Presidential Middle Names | 0 | - | 4.41 | 59,876 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 52,924 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,117 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,829 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,251 |
| Play-Doh Presidents | 0 | - | 5.00 | 81,884 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,414 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,763 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,867 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,412 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,294 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,708 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,364 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,225 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,643 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 304,014 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 69,619 |
| Soviet Leaders 1917–1991 | 0 | - | 4.43 | 94,633 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,723 |
| Name the English Monarchs | 0 | - | 4.92 | 499,627 |
| Every African Country Shape | 0 | - | 4.90 | 86,505 |
| U.S. Vice Presidents | 0 | - | 4.39 | 135,521 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,191 |
| First Ladies of the United States | 0 | - | 4.28 | 85,347 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,856 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,151 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 76,616 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,066 |
| Add a Letter - Make a U.S. President | 0 | - | 4.57 | 23,873 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,648 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,724 |
| Every European Country Shape | 0 | - | 4.96 | 200,695 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,268 |
| The Trojan War | 0 | - | 4.83 | 39,534 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 644,030 |
| Name that Greek Letter | 0 | - | 4.93 | 322,329 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,035 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,228 |
| Roman Emperors | 0 | - | 4.95 | 119,045 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 60,590 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,291 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 85,767 |
| Pope Facts | 0 | - | 4.39 | 31,118 |
| Every Asian Country Shape | 0 | - | 4.95 | 86,933 |
| Paramount Leaders of China | 0 | - | 4.36 | 11,021 |
| The Dictator Files: Chairman Mao | 0 | - | 4.28 | 20,608 |
| National Founders | 0 | - | 4.40 | 83,715 |
| Countries with the Most Hindus | 0 | - | 4.90 | 122,578 |
| Africa Flags Map Quiz | 0 | - | 4.95 | 36,117 |
| Eastern Africa Map Quiz | 0 | - | 4.98 | 78,424 |
| South America Flags Map Quiz | 0 | - | 4.95 | 87,067 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 28,534 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,680 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,551 |
| U.S. President Scramble | 0 | - | 4.40 | 116,407 |
| The John Adams Presidency | 0 | - | 4.12 | 8,701 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,707 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,799 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,760 |
| U.S. State Flags | 0 | - | 4.89 | 168,436 |
| U.S. States that Start with M - Shape Quiz | 0 | - | 4.94 | 57,826 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,700 |
| Olympian Gods Quiz | 0 | - | 4.96 | 497,890 |
| Ancient Greek Words | 0 | - | 4.93 | 111,018 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 124,927 |
| Ultimate Harry Potter Name Game | 0 | - | 4.94 | 492,010 |
| Countries that Start with C - Shape Quiz | 0 | - | 4.89 | 98,948 |
| Countries that Start with I - Shape Quiz | 0 | - | 4.86 | 113,697 |
| Countries that Start with A - Shape Quiz | 0 | - | 4.92 | 34,028 |
| Countries that Start with N - Shape Quiz | 0 | - | 4.94 | 82,482 |
| Colonies of Africa with a Map | 0 | - | 4.78 | 54,147 |
| Random African Countries on a Map | 0 | - | 4.99 | 294,482 |
| Random American Countries on a Map | 0 | - | 4.96 | 98,941 |
| The Dictator Files: Fidel Castro | 0 | - | 4.19 | 12,273 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 28,940 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.49 | 11,693 |
| The George Washington Presidency | 0 | - | 4.03 | 14,498 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,897 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,258 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,633 |
| Europe Map Quiz | 0 | - | 5.00 | 4,742,431 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 527,382 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,825 |
| Random European Countries on a Map | 0 | - | 4.97 | 282,514 |
| Europe Map with Random Merged Countries | 0 | - | 4.97 | 316,567 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 88,416 |
| History of Russia Quiz | 0 | - | 4.49 | 31,831 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.37 | 48,375 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 73,009 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,414 |
| History of Italy | 0 | - | 4.55 | 31,880 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,785 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,545 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,070 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,690 |
| Groups of Things - Harry Potter | 0 | - | 4.82 | 280,563 |
| Tolkien's Middle Earth Map Quiz | 0 | - | 4.91 | 37,289 |
| Random Asian Countries on a Map | 0 | - | 4.90 | 169,197 |
| 10 Plagues of Egypt | 0 | - | 4.41 | 53,667 |
| Communist Countries in History | 0 | - | 4.63 | 493,613 |
| Countries that Start with B - Shape Quiz | 0 | - | 4.90 | 26,792 |
| History of India | 0 | - | 4.61 | 21,331 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.69 | 55,278 |
| Africa Map Quiz | 0 | - | 5.00 | 2,109,335 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 267,209 |
| Random Sequential African Countries on a Map | 0 | - | 5.00 | 127,065 |
| History of South Africa | 0 | - | 4.60 | 17,632 |
| Oceania Map Quiz | 0 | - | 4.98 | 637,778 |
| Australian Capitals | 0 | - | 4.92 | 62,642 |
| History of Mexico | 0 | - | 4.58 | 15,252 |
| United States Map Quiz | 0 | - | 4.98 | 4,146,924 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,824 |
| Win the U.S. Presidential Election | 0 | - | 4.80 | 621,603 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,397 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,118 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,523 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,072 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 128,864 |
| Shapes of Mediterranean Sea Countries | 0 | - | 4.80 | 55,689 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 68,801 |
| Official European Union Languages | 0 | - | 4.97 | 237,501 |
| European Countries in their Native Language | 0 | - | 4.99 | 157,224 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 426,232 |
| Random Sequential European Countries on a Map | 0 | - | 4.99 | 216,530 |
| Save Europeans by Guessing Countries | 0 | - | 4.83 | 210,693 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 93,740 |
| History of Austria | 0 | - | 4.70 | 17,792 |
| Geography of the French Empire | 0 | - | 4.45 | 26,983 |
| The French Revolution | 0 | - | 4.46 | 23,848 |
| History of France | 0 | - | 4.59 | 56,504 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,418 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 143,707 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,853 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,825 |
| Figures from Greek Mythology | 0 | - | 4.91 | 185,643 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,111 |
| Byzantine History | 0 | - | 4.91 | 28,678 |
| History of The Netherlands | 0 | - | 4.46 | 17,351 |
| The Vikings! | 0 | - | 4.46 | 28,278 |
| The Portuguese Empire | 0 | - | 4.58 | 12,020 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,255 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,043 |
| Geography of the British Empire | 0 | - | 4.48 | 39,565 |
| Medieval English History | 0 | - | 4.53 | 43,375 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,443,363 |
| Asia Map Quiz | 0 | - | 4.99 | 909,992 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 278,007 |
| Random Sequential Asian Countries on a Map | 0 | - | 4.99 | 118,529 |
| History of Iran | 0 | - | 4.66 | 16,298 |
| Ottoman Empire Quiz | 0 | - | 4.42 | 17,066 |
| Prime Ministers of Israel | 0 | - | 3.97 | 17,860 |
| Vietnam War Countries | 0 | - | 4.83 | 93,843 |
| Chinese Inventions | 0 | - | 4.30 | 33,746 |
| History of China | 0 | - | 4.37 | 56,865 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,452 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,376 |
| Countries by Founding Story | 0 | - | 4.95 | 76,798 |
| Independence from Whom | 0 | - | 4.99 | 210,364 |
| Political Movements by Country | 0 | - | 4.46 | 72,359 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,195 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,169 |
| India A-Z | 0 | - | 4.42 | 33,995 |
| Bay of Bengal Countries With an Empty Map | 0 | - | 4.64 | 75,309 |
| Countries of Africa | 0 | - | 5.00 | 2,517,922 |
| Africa Cities Map Quiz | 0 | - | 4.97 | 98,587 |
| Flags of Africa Quiz | 0 | - | 5.00 | 466,003 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 46,165 |
| Top 10 Biggest African Countries by Area | 0 | - | 4.99 | 216,084 |
| 10 Southernmost Countries in Africa | 0 | - | 4.98 | 115,827 |
| 10 Northernmost Countries in Africa | 0 | - | 4.98 | 160,600 |
| Top 10 Smallest African Countries by Area | 0 | - | 4.96 | 32,762 |
| African East Coast | 0 | - | 4.96 | 95,419 |
| African Countries with the Shortest Names | 0 | - | 4.98 | 152,607 |
| Western Africa Map Quiz | 0 | - | 4.97 | 73,285 |
| Top African Languages on a Map | 0 | - | 4.92 | 73,070 |
| African Island Countries | 0 | - | 4.96 | 101,072 |
| Countries of Africa with an Empty Map | 0 | - | 5.00 | 242,282 |
| All First-Level Subdivisions of Africa on a Map | 0 | - | 4.92 | 32,919 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 50,114 |
| Australian States and Territories | 0 | - | 4.96 | 141,247 |
| Australian Immigration by Country | 0 | - | 4.81 | 77,108 |
| Australia Map Quiz | 0 | - | 4.94 | 343,080 |
| Australia True or False | 0 | - | 4.87 | 56,630 |
| Flags of North and South America | 0 | - | 4.99 | 369,527 |
| 10 Biggest American Countries by Area | 0 | - | 4.95 | 112,345 |
