| Mythical Creatures Quiz #1 | 0 | - | 4.92 | 710,667 |
| Olympian Gods Quiz | 0 | - | 4.96 | 504,363 |
| Figures from Greek Mythology | 0 | - | 4.91 | 190,076 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,730,663 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 652,833 |
| Name the English Monarchs | 0 | - | 4.91 | 507,297 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 428,842 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 440,355 |
| Prime Ministers of the UK | 0 | - | 4.95 | 443,071 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 383,871 |
| Name that Greek Letter | 0 | - | 4.93 | 325,243 |
| Commonwealth of Nations Countries | 0 | - | 4.95 | 238,587 |
| Axis Occupied Countries of WWII | 0 | - | 4.99 | 230,469 |
| Countries in World War I | 0 | - | 4.88 | 229,422 |
| Independence from Whom | 0 | - | 4.99 | 213,398 |
| Most Populous Countries in 1900 | 0 | - | 4.91 | 174,362 |
| Countries of the World in 1914 with a Map | 0 | - | 4.99 | 197,073 |
| Countries of the Soviet Union | 0 | - | 4.98 | 195,687 |
| Most-Visited Countries by U.S. Presidents | 0 | - | 4.96 | 194,940 |
| Biggest US Cities by Decade | 0 | - | 4.95 | 169,123 |
| Recently Independent Countries | 0 | - | 4.98 | 160,510 |
| Countries of Europe After World War II | 0 | - | 4.99 | 189,639 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 194,010 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 166,617 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,540 |
| Neutral European Countries of WWII | 0 | - | 4.92 | 162,530 |
| The Trojan War | 0 | - | 4.83 | 40,049 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 157,707 |
| Biggest European Cities by Century | 0 | - | 4.99 | 146,243 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 129,723 |
| Countries of the World in 1945 with a Map | 0 | - | 5.00 | 152,468 |
| Countries Settled by Vikings | 0 | - | 4.92 | 122,167 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 146,041 |
| Modern-Day Countries of the Roman Empire on a Map | 0 | - | 4.99 | 127,035 |
| First Countries to Reach 5 Million People | 0 | - | 4.93 | 136,013 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.89 | 114,390 |
| Biggest English Cities by Century | 0 | - | 4.91 | 107,090 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 119,020 |
| WWI... or WWII? | 0 | - | 4.85 | 143,801 |
| Roman Emperors | 0 | - | 4.95 | 121,411 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 117,098 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 104,677 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 104,972 |
| Countries by Former Name | 0 | - | 4.99 | 125,970 |
| Countries of Europe in 1444 | 0 | - | 4.92 | 100,743 |
| Countries Bordering China Since 1914 | 0 | - | 4.92 | 95,928 |
| Former Flags | 0 | - | 4.97 | 108,812 |
| Most Populous Modern-Day Countries by Century | 0 | - | 4.98 | 97,866 |
| Warsaw Pact Countries | 0 | - | 4.83 | 84,724 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,690 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 95,274 |
| Metals of Antiquity | 0 | - | 4.95 | 94,021 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 90,099 |
| Biggest Roman Empire Countries | 0 | - | 4.88 | 102,435 |
| Biggest Cities in Europe in 1700 | 0 | - | 4.93 | 71,494 |
| Former Countries by Territory Map | 0 | - | 4.96 | 104,204 |
| Most Populous Modern-Day Countries in 1 AD | 0 | - | 4.98 | 93,278 |
| Historical City to Country | 0 | - | 4.85 | 79,098 |
| Soviet Union Country Quiz | 0 | - | 4.91 | 81,229 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 83,531 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 81,824 |
| Most Populous Modern-Day Countries in 1000 AD | 0 | - | 4.88 | 76,607 |
| Empires by Maps | 0 | - | 4.98 | 122,531 |
| Military History Vocabulary | 0 | - | 4.92 | 67,756 |
| Most Populous Modern-Day Countries in 1500 AD | 0 | - | 4.93 | 73,922 |
| 25 Biggest Cities of the Soviet Union | 0 | - | 4.94 | 84,963 |
| Modern-Day Countries of the Umayyad Caliphate on a Map | 0 | - | 4.98 | 69,289 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 73,103 |
| Countries in the Byzantine Empire | 0 | - | 4.95 | 72,541 |
| Countries of the World in 1900 | 0 | - | 4.89 | 86,169 |
| Flags of Countries of the World in 1910 | 0 | - | 4.96 | 79,598 |
| Most Populous Modern-Day Countries in 1800 AD | 0 | - | 4.93 | 67,571 |
| Biggest Cities once in the Spanish Empire | 0 | - | 4.87 | 56,603 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 70,637 |
| Ultimate 20th Century History Quiz | 0 | - | 4.87 | 54,228 |
| Modern-Day Countries of the Inca Empire on a Map | 0 | - | 4.83 | 57,977 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,925 |
| Countries by Founding Story | 0 | - | 4.95 | 77,906 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 70,722 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 47,221 |
| Name a Valid Year in History | 0 | - | 4.93 | 68,097 |
| Battle to Country | 0 | - | 4.91 | 54,105 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 49,445 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,609 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,509 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.78 | 20,255 |
| Countries in World War II | 0 | - | 4.54 | 920,215 |
| U.S. Baby Boy Names by Decade | 0 | - | 4.55 | 492,421 |
| Communist Countries in History | 0 | - | 4.63 | 498,725 |
| Name that Historical Figure #1 | 0 | - | 4.63 | 341,030 |
| Famous Dictators #1 | 0 | - | 4.69 | 200,755 |
| Words for Leaders | 0 | - | 4.77 | 259,224 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,961 |
| Biggest Nations and Empires Ever | 0 | - | 4.46 | 146,749 |
| Ye Olde Professions | 0 | - | 4.63 | 157,589 |
| History by Letter - B | 0 | - | 4.45 | 173,460 |
| Current Events by Year, 1990–2009 | 0 | - | 4.77 | 153,041 |
| History by Letter - C | 0 | - | 4.70 | 172,798 |
| Roman to Greek God | 0 | - | 4.52 | 123,448 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 113,163 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 74,439 |
| 40 Historical People that Everyone Should Know | 0 | - | 4.08 | 1,017,054 |
| U.S. Baby Girl Names by Decade | 0 | - | 4.42 | 716,513 |
| Shakespeare's Plays Quiz | 0 | - | 4.37 | 390,513 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 306,400 |
| First Names of Historical Figures #1 | 0 | - | 4.40 | 230,636 |
| Name that Historical Figure #2 | 0 | - | 4.42 | 287,398 |
| World Leaders by Picture | 0 | - | 4.36 | 267,054 |
| Name the War | 0 | - | 4.37 | 202,983 |
| Name that Historical Figure #3 | 0 | - | 4.37 | 248,824 |
| Events in History #1 | 0 | - | 4.35 | 158,238 |
| WWII Trivia #1 | 0 | - | 4.36 | 178,716 |
| People Who Were "The" Something | 0 | - | 4.25 | 156,465 |
| Popular Royal Names | 0 | - | 4.27 | 125,453 |
| Name that Historical Figure #4 | 0 | - | 4.29 | 161,271 |
| History by Letter - J | 0 | - | 4.51 | 155,147 |
| History by Letter - A | 0 | - | 4.51 | 154,032 |
| Former Countries | 0 | - | 4.77 | 134,317 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 133,662 |
| Countries the UK Declared War On | 0 | - | 4.55 | 123,362 |
| History by Letter - E | 0 | - | 4.51 | 141,623 |
| Famous Empires by Description | 0 | - | 4.73 | 119,058 |
| Cities in European History #1 | 0 | - | 4.63 | 134,727 |
| Art Works Picture Quiz #1 | 0 | - | 4.51 | 119,973 |
| WWII Geography | 0 | - | 4.81 | 121,498 |
| Mythical Creatures #2 | 0 | - | 4.06 | 112,414 |
| Ancient City to Country | 0 | - | 4.72 | 108,399 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 109,653 |
| History by Letter - G | 0 | - | 4.46 | 123,198 |
| Name the Popes Quiz | 0 | - | 4.47 | 139,079 |
| History by Letter - M | 0 | - | 4.54 | 120,793 |
| Country by Photo of its Leader | 0 | - | 4.70 | 124,742 |
| Art Works Picture Quiz #2 | 0 | - | 4.49 | 106,107 |
| Mythical Lands | 0 | - | 4.26 | 85,524 |
| WWII A-Z #1 | 0 | - | 4.73 | 103,464 |
| People in History A-Z #1 | 0 | - | 4.63 | 99,802 |
| Quotes from Historical Figures #1 | 0 | - | 4.50 | 87,784 |
| Most Populous Countries by Year | 0 | - | 4.83 | 111,607 |
| WWII Trivia #2 | 0 | - | 4.52 | 104,701 |
| Things with Names from Classical Mythology | 0 | - | 4.28 | 88,274 |
| Vietnam War Countries | 0 | - | 4.82 | 94,743 |
| The 20th Century | 0 | - | 4.46 | 97,865 |
| World War I Quiz | 0 | - | 4.78 | 102,161 |
| Notable People of WWII | 0 | - | 4.53 | 86,635 |
| Countries That Were Invaded | 0 | - | 4.55 | 98,310 |
| Assassinated U.S. Presidents | 0 | - | 4.62 | 94,935 |
| Famous Ancient Romans | 0 | - | 4.70 | 85,829 |
| Countries of the Popes | 0 | - | 4.79 | 128,880 |
| History Multiple Choice #1 | 0 | - | 4.41 | 82,401 |
| Ancient Greek Words | 0 | - | 4.93 | 112,639 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,682 |
| History General Knowledge #3 | 0 | - | 4.50 | 97,106 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.62 | 94,746 |
| Countries "Ruled" by King Charles III | 0 | - | 4.78 | 82,918 |
| Top 10 World Cities Through History | 0 | - | 4.43 | 79,200 |
| History Analogies #3 | 0 | - | 4.61 | 80,984 |
| Most Populous Countries in 1950 | 0 | - | 4.63 | 86,589 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,465 |
| Political Movements by Country | 0 | - | 4.46 | 72,822 |
| History Analogies #2 | 0 | - | 4.49 | 77,540 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,277 |
| The 7 Wonders of the Ancient World | 0 | - | 4.86 | 82,663 |
| Biggest Cities Once in the Roman Empire | 0 | - | 4.81 | 76,219 |
| The 21st Century | 0 | - | 4.47 | 106,522 |
| Biggest British Empire Countries | 0 | - | 4.74 | 100,597 |
| Former Capitals | 0 | - | 4.88 | 71,727 |
| Years in History #1 - Multiple Choice | 0 | - | 4.82 | 70,712 |
| First U.S. States to Reach 1 Million People | 0 | - | 4.69 | 79,595 |
| 2010s Decade Quiz | 0 | - | 4.53 | 103,877 |
| Political Figures by Last Name #1 | 0 | - | 4.56 | 68,826 |
| Biggest Cities in History | 0 | - | 4.52 | 90,695 |
| Time Magazine Person of the Year | 0 | - | 4.53 | 74,520 |
| The American Revolution | 0 | - | 4.52 | 54,384 |
| The Dictator Files: Adolf Hitler | 0 | - | 4.78 | 78,392 |
| Biggest World Cities in 1850 | 0 | - | 4.61 | 68,732 |
| Countries of Asia in 1900 | 0 | - | 4.50 | 58,328 |
| Cities by Former Name | 0 | - | 4.83 | 92,179 |
| Current Events by Year, 1970–1989 | 0 | - | 4.56 | 65,351 |
| The 16th Century | 0 | - | 4.77 | 58,994 |
| A to Z: Legendary Creatures | 0 | - | 4.28 | 53,344 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.69 | 55,702 |
| Houses of British Monarchs | 0 | - | 4.54 | 66,016 |
| The American Civil War | 0 | - | 4.62 | 52,656 |
| First U.S. Cities to Reach 100,000 People | 0 | - | 4.69 | 60,521 |
| WWII A-Z #2 | 0 | - | 4.44 | 54,939 |
| The 11th and 12th Century | 0 | - | 4.53 | 56,283 |
| Inventions by Country #1 | 0 | - | 4.47 | 55,198 |
| Famous Inventors | 0 | - | 4.44 | 43,618 |
| Word Chain - Greek and Roman Mythology | 0 | - | 4.50 | 57,067 |
| Six Flags Over Texas | 0 | - | 4.78 | 63,648 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,488 |
| Colonies of Africa with a Map | 0 | - | 4.79 | 54,823 |
| Answers by Time Period | 0 | - | 4.64 | 55,935 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 70,655 |
| The 18th Century | 0 | - | 4.53 | 53,454 |
| Medieval English History | 0 | - | 4.53 | 43,688 |
| Canadian Prime Ministers | 0 | - | 4.64 | 58,000 |
| Valid Answer - World History #1 | 0 | - | 4.56 | 62,202 |
| The 14th Century | 0 | - | 4.55 | 49,432 |
| Name a Valid Answer - World War II | 0 | - | 4.53 | 55,954 |
