| Territory Changes in World War I | 0 | - | 4.87 | 46,673 |
| Normandy D-Day Beaches | 0 | - | 4.83 | 40,376 |
| WWII Geography | 0 | - | 4.81 | 120,151 |
| WWII Figures by Picture | 0 | - | 4.89 | 65,199 |
| WWI... or WWII? | 0 | - | 4.85 | 141,935 |
| World War I Quiz | 0 | - | 4.78 | 101,154 |
| WWI A-Z | 0 | - | 4.50 | 38,280 |
| Military History Vocabulary | 0 | - | 4.91 | 67,049 |
| Notable People of WWII | 0 | - | 4.53 | 85,852 |
| WWII Trivia #2 | 0 | - | 4.52 | 103,878 |
| WWII Trivia #1 | 0 | - | 4.36 | 177,480 |
| World War II Multiple Choice | 0 | - | 4.38 | 103,665 |
| Name a Valid Answer - World War II | 0 | - | 4.53 | 55,316 |
| WWII True or False? | 0 | - | 4.56 | 57,446 |
| Countries That Were Invaded | 0 | - | 4.55 | 97,334 |
| WWII Movies by Plot | 0 | - | 4.21 | 27,064 |
| WWII A-Z #1 | 0 | - | 4.78 | 102,868 |
| WWII A-Z #2 | 0 | - | 4.44 | 54,607 |
| WWII Decoder | 0 | - | 4.41 | 53,486 |
| Famous Battles Quiz | 0 | - | 4.21 | 48,961 |
| Name the War | 0 | - | 4.37 | 201,481 |
| Famous U.S. Generals | 0 | - | 4.27 | 38,522 |
| Names for Warriors | 0 | - | 4.40 | 36,905 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 287,532 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 272,013 |
| Countries with NO Military | 0 | - | 4.97 | 61,990 |
| Top Arms Exporting Countries | 0 | - | 4.96 | 90,904 |
| Countries with the Most Tanks | 0 | - | 4.91 | 107,167 |
| Famous Generals - Non U.S. | 0 | - | 4.59 | 15,124 |
| Military History A-Z | 0 | - | 4.20 | 21,142 |
| Time Magazine Person of the Year | 0 | - | 4.53 | 74,006 |
| "Second Best" History Edition | 0 | - | 4.94 | 62,807 |
| G7 Leaders Since 2003 | 0 | - | 4.48 | 46,409 |
| People Who Died in Battle | 0 | - | 4.35 | 22,311 |
| Top Arms Importing Countries | 0 | - | 4.73 | 65,954 |
| World Leaders of the Cold War | 0 | - | 4.27 | 25,251 |
| Famous Dictators #1 | 0 | - | 4.69 | 199,541 |
| Art Works Picture Quiz #1 | 0 | - | 4.51 | 118,982 |
| Art Works Picture Quiz #2 | 0 | - | 4.49 | 105,187 |
| Art Works Picture Quiz #3 | 0 | - | 4.45 | 48,707 |
| WWII for Dummies | 0 | - | 4.79 | 104,746 |
| U.S. Military Acronyms | 0 | - | 4.39 | 101,074 |
| Historical Leaders by Date #1 | 0 | - | 4.48 | 31,378 |
| Historical Leaders by Date #2 | 0 | - | 4.55 | 30,206 |
| Historical Rulers #2 | 0 | - | 4.26 | 47,408 |
| Historical Rulers #1 | 0 | - | 4.35 | 118,805 |
| Former Countries by Territory Map | 0 | - | 4.96 | 102,589 |
| Empires by Maps | 0 | - | 4.98 | 120,040 |
| World Leaders Quiz #1 | 0 | - | 4.11 | 109,960 |
| Ultimate 20th Century History Quiz | 0 | - | 4.86 | 53,625 |
| The 7 Wonders of the Ancient World | 0 | - | 4.85 | 82,333 |
| Countries with U.S. Troops | 0 | - | 4.38 | 132,013 |
| Countries With the Largest Air Forces | 0 | - | 4.47 | 51,421 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 52,093 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,314,197 |
| Google What's the Difference? - History | 0 | - | 4.20 | 46,199 |
| Metals of Antiquity | 0 | - | 4.95 | 93,334 |
| Popular Royal Names | 0 | - | 4.27 | 124,855 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,605 |
| History: What Came First? #1 | 0 | - | 4.87 | 105,102 |
| Famous Dictators #2 | 0 | - | 4.31 | 87,415 |
| Mythical Creatures Quiz #1 | 0 | - | 4.92 | 706,751 |
| First Names of Painters | 0 | - | 4.43 | 59,811 |
| 1960s Decade Quiz #2 | 0 | - | 4.45 | 44,885 |
| Years in History #1 - Multiple Choice | 0 | - | 4.85 | 70,205 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,309 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,328 |
| Geography of the British Empire | 0 | - | 4.48 | 39,637 |
| Weapons by Picture | 0 | - | 4.13 | 21,031 |
| Most Common English Verbs - Extreme | 0 | - | 4.96 | 156,891 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,191 |
| Top 10 Oldest African Countries | 0 | - | 4.88 | 27,893 |
| Influential Women in History | 0 | - | 4.42 | 35,514 |
| Cradles of Civilization | 0 | - | 4.46 | 39,570 |
| History of The Netherlands | 0 | - | 4.46 | 17,412 |
| Materials From History #1 | 0 | - | 4.56 | 51,489 |
| Historical Countries by Ruler | 0 | - | 4.48 | 48,547 |
| World Leaders Quiz #2 | 0 | - | 4.00 | 35,820 |
| UN Secretaries-General | 0 | - | 4.40 | 7,787 |
| Benevolent Dictators and Enlightened Despots | 0 | - | 4.01 | 19,603 |
| Recently Independent Countries | 0 | - | 4.98 | 159,032 |
| 1960s Decade Quiz #1 | 0 | - | 4.40 | 50,016 |
| Biggest Nations and Empires Ever | 0 | - | 4.52 | 145,760 |
| Famous Explorers | 0 | - | 4.58 | 36,125 |
| Famous Empires by Description | 0 | - | 4.73 | 118,341 |
| Answers by Time Period | 0 | - | 4.64 | 55,523 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,948 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,881 |
| 17th Century A-Z | 0 | - | 4.78 | 34,605 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,261 |
| French History Multiple Choice | 0 | - | 4.55 | 33,005 |
| All Modern-Day Countries Ever Controlled by Turkic People | 0 | - | 4.94 | 40,955 |
| All Modern-Day Countries Ever Controlled by Arab People with a Map | 0 | - | 4.98 | 55,253 |
| Anglo-Saxon Kingdoms of England | 0 | - | 4.60 | 25,740 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.78 | 20,134 |
| Medieval English History | 0 | - | 4.53 | 43,471 |
| History of Germany | 0 | - | 4.39 | 52,785 |
| Most Important People in History | 0 | - | 3.97 | 50,653 |
| Fictional Military Characters Quiz | 0 | - | 4.27 | 19,605 |
| Countries with the Most Elite Universities | 0 | - | 4.94 | 148,035 |
| Countries with the Least Dense Road Networks | 0 | - | 4.81 | 41,512 |
| Monarchies of the World | 0 | - | 4.94 | 168,301 |
| Countries by Hottest Recorded Temperature | 0 | - | 4.92 | 112,379 |
| Countries by Coldest Recorded Temperature | 0 | - | 4.83 | 111,617 |
| Countries where the Sea Freezes | 0 | - | 4.93 | 114,124 |
| Largest Countries Without Deserts | 0 | - | 4.89 | 75,014 |
| Disney Animated Characters | 0 | - | 4.88 | 601,016 |
| People on Money by Country | 0 | - | 4.83 | 60,297 |
| Countries by Number of Books Published | 0 | - | 4.95 | 72,420 |
| Fast Math - Addition | 0 | - | 4.87 | 522,254 |
| NATO Countries | 0 | - | 4.98 | 279,394 |
| EU Countries Quiz | 0 | - | 4.99 | 272,999 |
| Top Five Countries by Religion | 0 | - | 4.93 | 170,821 |
| 7 Deadly Sins | 0 | - | 4.88 | 399,260 |
| Books of the Protestant Bible | 0 | - | 4.89 | 209,479 |
| Majority Muslim Countries | 0 | - | 4.98 | 373,321 |
| Astronomy Quiz | 0 | - | 4.90 | 82,425 |
| Largest Objects in the Solar System | 0 | - | 4.99 | 136,952 |
| Solar System Trivia | 0 | - | 4.93 | 46,517 |
| Countries with the Longest High Speed Rail Networks | 0 | - | 4.91 | 65,575 |
| Cities with the Most Metro Rail Stations | 0 | - | 4.89 | 102,263 |
| Countries that Start with a Vowel | 0 | - | 4.99 | 130,070 |
| Countries with the Most JetPunk Users | 0 | - | 4.99 | 167,595 |
| Most Common JetPunk Answers - Countries | 0 | - | 4.91 | 87,412 |
| Countries By Wikipedia Word Clouds | 0 | - | 4.83 | 39,602 |
| Countries with the Most Major Earthquakes | 0 | - | 4.94 | 117,180 |
| Country Superlatives - Top 2 | 0 | - | 4.99 | 70,405 |
| Former Flags | 0 | - | 4.97 | 107,508 |
| Years in History by Picture | 0 | - | 4.44 | 35,449 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,120 |
| Historical Events - AD or BC? | 0 | - | 4.70 | 57,531 |
| Materials From History #2 | 0 | - | 4.59 | 31,456 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,892 |
| Former Capitals | 0 | - | 4.88 | 71,385 |
| Cold War Decoder | 0 | - | 4.83 | 52,265 |
| Warsaw Pact Countries | 0 | - | 4.83 | 84,451 |
| 20th Century Dates Quiz | 0 | - | 4.56 | 39,387 |
| Events in History #2 | 0 | - | 4.49 | 71,652 |
| Events in History #4 | 0 | - | 4.44 | 44,265 |
| Name a Valid Year in History | 0 | - | 4.93 | 67,062 |
| Infamous Criminals - Mostly U.S. | 0 | - | 4.21 | 48,966 |
| Assassinations in History | 0 | - | 4.21 | 66,158 |
| Famous Seconds | 0 | - | 4.22 | 46,554 |
| Ages and Eras | 0 | - | 4.39 | 67,658 |
| Celebrity Knights of the United Kingdom | 0 | - | 4.23 | 39,473 |
| Titled People Quiz #1 | 0 | - | 4.11 | 45,766 |
| Titled People Quiz #3 | 0 | - | 4.34 | 43,145 |
| Job Titles Quiz #1 | 0 | - | 4.22 | 75,960 |
| Female Historical Figures | 0 | - | 4.28 | 33,224 |
| Historical Blunders | 0 | - | 4.34 | 91,902 |
| Territorial Accessions | 0 | - | 4.36 | 34,763 |
| People Known as "The Great" | 0 | - | 4.46 | 24,643 |
| This Day in History - July | 0 | - | 4.49 | 36,437 |
| This Day in History - August | 0 | - | 4.42 | 43,341 |
| This Day in History - September | 0 | - | 4.55 | 57,407 |
| This Day in History - October | 0 | - | 4.49 | 37,608 |
| This Day in History - January | 0 | - | 4.50 | 46,687 |
| This Day in History - March | 0 | - | 4.45 | 43,642 |
| Ancient Civilizations | 0 | - | 4.64 | 37,922 |
| Battle to Country | 0 | - | 4.91 | 53,172 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,910 |
| The Places They Went #1 | 0 | - | 4.74 | 33,521 |
| Famous Inventors | 0 | - | 4.44 | 43,526 |
| Embarrassing Chapters in British History | 0 | - | 4.29 | 32,229 |
| Modern Day Countries of the Kushan Empire on a Map | 0 | - | 4.89 | 24,830 |
| All Modern-Day Countries Ever Controlled by the Seljuks | 0 | - | 4.92 | 28,468 |
| European History for Dummies | 0 | - | 4.83 | 89,776 |
| History of Scotland | 0 | - | 4.51 | 21,077 |
| Kings of France Quiz | 0 | - | 4.20 | 32,689 |
| 40 Historical People that Everyone Should Know | 0 | - | 4.09 | 1,013,267 |
| Branches of the U.S. Military | 0 | - | 4.39 | 24,336 |
| Countries with the Most Skyscrapers | 0 | - | 4.92 | 143,966 |
| U.S. Cities with the Most Skyscrapers | 0 | - | 4.89 | 95,515 |
| Countries with the Tallest Buildings | 0 | - | 4.93 | 104,254 |
| Coldest Countries | 0 | - | 4.97 | 138,320 |
| Coldest World Capitals | 0 | - | 4.95 | 133,475 |
| Five Coldest Countries by Continent | 0 | - | 4.97 | 76,508 |
| Countries with the Least Precipitation | 0 | - | 4.90 | 82,617 |
| Capital Cities with the Least Precipitation | 0 | - | 4.89 | 29,155 |
| World Currency Quiz | 0 | - | 4.91 | 302,046 |
| Countries with the Most Billionaires | 0 | - | 4.90 | 334,919 |
| Countries with the Most Millionaires | 0 | - | 4.86 | 123,233 |
| Five Biggest Economies by Continent | 0 | - | 4.98 | 194,952 |
| Countries with the Most Exports | 0 | - | 4.96 | 155,141 |
| Biggest Export Partners For Every Country | 0 | - | 4.98 | 50,381 |
| Top Crude Oil Producing Countries | 0 | - | 4.89 | 189,456 |
| Countries by Oil Consumption | 0 | - | 4.96 | 120,300 |
| Top Oil Reserve Countries | 0 | - | 4.93 | 74,673 |
| Richest Island Countries | 0 | - | 4.84 | 100,327 |
| Cities with the Biggest Economies | 0 | - | 4.90 | 130,716 |
| Largest Economies in 2050 | 0 | - | 4.90 | 111,298 |
| Richest Countries by Per-Capita GDP | 0 | - | 4.96 | 270,497 |
| Countries With Highest GDP as a Percent of Continent | 0 | - | 4.96 | 104,083 |
| Countries with the Highest GDP per Square Kilometer | 0 | - | 4.89 | 84,383 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,207 |
| Countries with the Most Muslims | 0 | - | 4.95 | 160,175 |
| Buddhist Countries | 0 | - | 4.96 | 144,032 |
| The Sun Quiz | 0 | - | 4.93 | 34,548 |
| Planets of the Solar System Quiz | 0 | - | 4.93 | 1,096,038 |
| Name the Constellations - With a Map | 0 | - | 4.92 | 35,875 |
