| Mythical Creatures Quiz #1 | 0 | - | 4.92 | 708,241 |
| Olympian Gods Quiz | 0 | - | 4.96 | 501,594 |
| Figures from Greek Mythology | 0 | - | 4.91 | 187,357 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,705,650 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 648,458 |
| Name the English Monarchs | 0 | - | 4.91 | 503,582 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 426,892 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 437,704 |
| Prime Ministers of the UK | 0 | - | 4.95 | 439,793 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 382,174 |
| Name that Greek Letter | 0 | - | 4.93 | 324,073 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 237,613 |
| Axis Occupied Countries of WWII | 0 | - | 4.99 | 229,277 |
| Countries in World War I | 0 | - | 4.88 | 228,383 |
| Independence from Whom | 0 | - | 4.99 | 211,997 |
| Most Populous Countries in 1900 | 0 | - | 4.91 | 173,881 |
| Countries of the World in 1914 with a Map | 0 | - | 4.99 | 195,622 |
| Countries of the Soviet Union | 0 | - | 4.98 | 194,749 |
| Most-Visited Countries by U.S. Presidents | 0 | - | 4.96 | 193,802 |
| Biggest US Cities by Decade | 0 | - | 4.95 | 168,466 |
| Recently Independent Countries | 0 | - | 4.98 | 159,430 |
| Countries of Europe After World War II | 0 | - | 4.99 | 188,626 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 192,450 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 165,573 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,638 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 161,684 |
| The Trojan War | 0 | - | 4.83 | 39,778 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 156,769 |
| Biggest European Cities by Century | 0 | - | 4.99 | 145,695 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 129,373 |
| Countries of the World in 1945 with a Map | 0 | - | 5.00 | 151,200 |
| Countries Settled by Vikings | 0 | - | 4.93 | 121,727 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 144,864 |
| Modern-Day Countries of the Roman Empire on a Map | 0 | - | 4.99 | 126,123 |
| First Countries to Reach 5 Million People | 0 | - | 4.92 | 135,449 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,672 |
| Biggest English Cities by Century | 0 | - | 4.91 | 106,434 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,893 |
| WWI... or WWII? | 0 | - | 4.85 | 142,507 |
| Roman Emperors | 0 | - | 4.95 | 120,299 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 116,194 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 104,334 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 104,002 |
| Countries by Former Name | 0 | - | 4.99 | 125,284 |
| Countries of Europe in 1444 | 0 | - | 4.92 | 99,954 |
| Countries Bordering China Since 1914 | 0 | - | 4.92 | 95,482 |
| Former Flags | 0 | - | 4.97 | 107,910 |
| Most Populous Modern-Day Countries by Century | 0 | - | 4.98 | 97,380 |
| Warsaw Pact Countries | 0 | - | 4.83 | 84,552 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,022 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,411 |
| Metals of Antiquity | 0 | - | 4.95 | 93,560 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 89,440 |
| Biggest Roman Empire Countries | 0 | - | 4.87 | 101,974 |
| Biggest Cities in Europe in 1700 | 0 | - | 4.93 | 71,118 |
| Former Countries by Territory Map | 0 | - | 4.96 | 103,026 |
| Most Populous Modern-Day Countries in 1 AD | 0 | - | 4.98 | 92,872 |
| Historical City to Country | 0 | - | 4.84 | 78,612 |
| Soviet Union Country Quiz | 0 | - | 4.91 | 80,825 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 82,916 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 81,376 |
| Most Populous Modern-Day Countries in 1000 AD | 0 | - | 4.88 | 76,280 |
| Empires by Maps | 0 | - | 4.98 | 120,821 |
| Military History Vocabulary | 0 | - | 4.91 | 67,242 |
| Most Populous Modern-Day Countries in 1500 AD | 0 | - | 4.93 | 73,617 |
| 25 Biggest Cities of the Soviet Union | 0 | - | 4.94 | 84,605 |
| Modern-Day Countries of the Umayyad Caliphate on a Map | 0 | - | 4.98 | 68,882 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,757 |
| Countries in the Byzantine Empire | 0 | - | 4.95 | 72,238 |
| Countries of the World in 1900 | 0 | - | 4.89 | 85,158 |
| Flags of Countries of the World in 1910 | 0 | - | 4.96 | 79,002 |
| Most Populous Modern-Day Countries in 1800 AD | 0 | - | 4.93 | 67,314 |
| Biggest Cities once in the Spanish Empire | 0 | - | 4.87 | 56,268 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 70,053 |
| Ultimate 20th Century History Quiz | 0 | - | 4.87 | 53,829 |
| Modern-Day Countries of the Inca Empire on a Map | 0 | - | 4.83 | 57,541 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,575 |
| Countries by Founding Story | 0 | - | 4.95 | 77,336 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 69,520 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,825 |
| Name a Valid Year in History | 0 | - | 4.93 | 67,410 |
| Battle to Country | 0 | - | 4.91 | 53,474 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 48,779 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,235 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 32,149 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.78 | 20,177 |
| Countries in World War II | 0 | - | 4.54 | 914,178 |
| U.S. Baby Boy Names by Decade | 0 | - | 4.55 | 490,135 |
| Communist Countries in History | 0 | - | 4.63 | 496,292 |
| Name that Historical Figure #1 | 0 | - | 4.63 | 337,968 |
| Famous Dictators #1 | 0 | - | 4.69 | 199,981 |
| Words for Leaders | 0 | - | 4.77 | 257,647 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,993 |
| Biggest Nations and Empires Ever | 0 | - | 4.46 | 146,107 |
| Ye Olde Professions | 0 | - | 4.63 | 156,965 |
| History by Letter - B | 0 | - | 4.45 | 172,673 |
| Current Events by Year, 1990–2009 | 0 | - | 4.77 | 152,676 |
| History by Letter - C | 0 | - | 4.70 | 171,949 |
| Roman to Greek God | 0 | - | 4.52 | 122,959 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,092 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 73,805 |
| 40 Historical People that Everyone Should Know | 0 | - | 4.09 | 1,014,501 |
| U.S. Baby Girl Names by Decade | 0 | - | 4.42 | 713,525 |
| Shakespeare's Plays Quiz | 0 | - | 4.37 | 388,561 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 305,243 |
| First Names of Historical Figures #1 | 0 | - | 4.39 | 229,513 |
| Name that Historical Figure #2 | 0 | - | 4.42 | 284,930 |
| World Leaders by Picture | 0 | - | 4.36 | 265,705 |
| Name the War | 0 | - | 4.37 | 201,817 |
| Name that Historical Figure #3 | 0 | - | 4.36 | 239,706 |
| Events in History #1 | 0 | - | 4.34 | 157,842 |
| WWII Trivia #1 | 0 | - | 4.36 | 177,928 |
| People Who Were "The" Something | 0 | - | 4.25 | 155,939 |
| Popular Royal Names | 0 | - | 4.27 | 125,044 |
| Name that Historical Figure #4 | 0 | - | 4.29 | 159,368 |
| History by Letter - J | 0 | - | 4.51 | 154,446 |
| History by Letter - A | 0 | - | 4.51 | 153,365 |
| Former Countries | 0 | - | 4.75 | 133,884 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 132,665 |
| Countries the UK Declared War On | 0 | - | 4.55 | 122,615 |
| History by Letter - E | 0 | - | 4.51 | 140,984 |
| Famous Empires by Description | 0 | - | 4.73 | 118,583 |
| Cities in European History #1 | 0 | - | 4.63 | 134,150 |
| Art Works Picture Quiz #1 | 0 | - | 4.51 | 119,425 |
| WWII Geography | 0 | - | 4.81 | 120,505 |
| Mythical Creatures #2 | 0 | - | 4.05 | 111,908 |
| Ancient City to Country | 0 | - | 4.70 | 108,111 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 108,869 |
| History by Letter - G | 0 | - | 4.46 | 122,461 |
| Name the Popes Quiz | 0 | - | 4.47 | 138,364 |
| History by Letter - M | 0 | - | 4.54 | 120,144 |
| Country by Photo of its Leader | 0 | - | 4.72 | 124,217 |
| Art Works Picture Quiz #2 | 0 | - | 4.49 | 105,491 |
| Mythical Lands | 0 | - | 4.26 | 85,388 |
| WWII A-Z #1 | 0 | - | 4.73 | 103,090 |
| People in History A-Z #1 | 0 | - | 4.63 | 99,136 |
| Quotes from Historical Figures #1 | 0 | - | 4.50 | 87,539 |
| Most Populous Countries by Year | 0 | - | 4.83 | 110,814 |
| WWII Trivia #2 | 0 | - | 4.52 | 104,269 |
| Things with Names from Classical Mythology | 0 | - | 4.28 | 87,838 |
| Vietnam War Countries | 0 | - | 4.82 | 94,324 |
| The 20th Century | 0 | - | 4.46 | 97,649 |
| World War I Quiz | 0 | - | 4.78 | 101,413 |
| Notable People of WWII | 0 | - | 4.53 | 85,992 |
| Countries That Were Invaded | 0 | - | 4.55 | 97,511 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,649 |
| Famous Ancient Romans | 0 | - | 4.70 | 85,543 |
| Countries of the Popes | 0 | - | 4.79 | 128,268 |
| History Multiple Choice #1 | 0 | - | 4.41 | 82,036 |
| Ancient Greek Words | 0 | - | 4.93 | 111,827 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,619 |
| History General Knowledge #3 | 0 | - | 4.50 | 96,508 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.62 | 93,939 |
| Countries "Ruled" by King Charles III | 0 | - | 4.78 | 82,769 |
| Top 10 World Cities Through History | 0 | - | 4.43 | 77,920 |
| History Analogies #3 | 0 | - | 4.61 | 80,706 |
| Most Populous Countries in 1950 | 0 | - | 4.63 | 86,108 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,286 |
| Political Movements by Country | 0 | - | 4.46 | 72,595 |
| History Analogies #2 | 0 | - | 4.49 | 77,273 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,056 |
| The 7 Wonders of the Ancient World | 0 | - | 4.85 | 82,449 |
| Biggest Cities Once in the Roman Empire | 0 | - | 4.81 | 75,539 |
| The 21st Century | 0 | - | 4.47 | 106,097 |
| Biggest British Empire Countries | 0 | - | 4.74 | 100,140 |
| Former Capitals | 0 | - | 4.88 | 71,506 |
| Years in History #1 - Multiple Choice | 0 | - | 4.85 | 70,371 |
| First U.S. States to Reach 1 Million People | 0 | - | 4.69 | 79,324 |
| 2010s Decade Quiz | 0 | - | 4.53 | 103,026 |
| Political Figures by Last Name #1 | 0 | - | 4.56 | 68,144 |
| Biggest Cities in History | 0 | - | 4.52 | 90,257 |
| Time Magazine Person of the Year | 0 | - | 4.53 | 74,175 |
| The American Revolution | 0 | - | 4.52 | 54,278 |
| The Dictator Files: Adolf Hitler | 0 | - | 4.79 | 78,029 |
| Biggest World Cities in 1850 | 0 | - | 4.61 | 68,517 |
| Countries of Asia in 1900 | 0 | - | 4.50 | 58,070 |
| Cities by Former Name | 0 | - | 4.83 | 91,666 |
| Current Events by Year, 1970–1989 | 0 | - | 4.56 | 65,207 |
| The 16th Century | 0 | - | 4.77 | 58,911 |
| A to Z: Legendary Creatures | 0 | - | 4.26 | 53,110 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.69 | 55,495 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,741 |
| The American Civil War | 0 | - | 4.62 | 52,476 |
| First U.S. Cities to Reach 100,000 People | 0 | - | 4.69 | 60,269 |
| WWII A-Z #2 | 0 | - | 4.44 | 54,734 |
| The 11th and 12th Century | 0 | - | 4.53 | 56,168 |
| Inventions by Country #1 | 0 | - | 4.47 | 55,077 |
| Famous Inventors | 0 | - | 4.44 | 43,557 |
| Word Chain - Greek and Roman Mythology | 0 | - | 4.50 | 56,702 |
| Six Flags Over Texas | 0 | - | 4.78 | 63,418 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,388 |
| Colonies of Africa with a Map | 0 | - | 4.78 | 54,521 |
| Answers by Time Period | 0 | - | 4.64 | 55,658 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 70,171 |
| The 18th Century | 0 | - | 4.53 | 53,340 |
| Medieval English History | 0 | - | 4.53 | 43,559 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,606 |
| Valid Answer - World History #1 | 0 | - | 4.56 | 61,943 |
| The 14th Century | 0 | - | 4.55 | 49,346 |
| Name a Valid Answer - World War II | 0 | - | 4.53 | 55,511 |
