| #1 Hits of the 2020s | 0 | - | 4.46 | 92,276 |
| Normandy D-Day Beaches | 0 | - | 4.83 | 40,086 |
| Territory Changes in World War I | 0 | - | 4.86 | 46,192 |
| #1 Hits of the 2010s | 0 | - | 4.41 | 294,093 |
| Nicknames in World History | 0 | - | 4.73 | 37,313 |
| "Second Best" History Edition | 0 | - | 4.94 | 61,675 |
| WWII Geography | 0 | - | 4.81 | 119,295 |
| WWII Figures by Picture | 0 | - | 4.85 | 50,454 |
| Quotes from Historical Figures #1 | 0 | - | 4.50 | 87,095 |
| Musicians Who Died Young | 0 | - | 4.39 | 107,396 |
| Former Countries by Territory Map | 0 | - | 4.96 | 101,399 |
| Empires by Maps | 0 | - | 4.98 | 118,278 |
| Ultimate 20th Century History Quiz | 0 | - | 4.86 | 53,170 |
| WWI... or WWII? | 0 | - | 4.85 | 140,533 |
| Historical Middle Names | 0 | - | 4.16 | 35,361 |
| First Names of Historical Figures #2 | 0 | - | 4.32 | 40,214 |
| First Names of Historical Figures #1 | 0 | - | 4.39 | 228,545 |
| The 7 Wonders of the Ancient World | 0 | - | 4.85 | 82,056 |
| Songs by Picture Quiz #1 | 0 | - | 4.68 | 65,309 |
| Songs by Picture Quiz #2 | 0 | - | 4.41 | 58,367 |
| First Names of Explorers Quiz | 0 | - | 4.43 | 18,244 |
| Mythical Lands | 0 | - | 4.26 | 85,144 |
| Saint in the Answers | 0 | - | 4.10 | 44,142 |
| First Name + Initial Quiz | 0 | - | 4.03 | 52,717 |
| Historical Figures Known by a Single Name #1 | 0 | - | 4.31 | 84,457 |
| Quotes from Historical Figures #2 | 0 | - | 4.36 | 42,499 |
| Ben Franklin Quotes | 0 | - | 4.45 | 25,743 |
| Famous Speeches from History | 0 | - | 4.16 | 33,518 |
| Music by Year, 1990–2009 | 0 | - | 4.20 | 109,344 |
| Music by Year, 1970–1989 | 0 | - | 4.31 | 40,943 |
| Most Popular NBA Jerseys | 0 | - | 4.38 | 832,173 |
| Metals of Antiquity | 0 | - | 4.94 | 92,846 |
| Popular Royal Names | 0 | - | 4.27 | 124,448 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,116 |
| History: What Came First? #1 | 0 | - | 4.87 | 104,109 |
| Mythical Creatures Quiz #1 | 0 | - | 4.92 | 704,119 |
| First Names of Painters | 0 | - | 4.43 | 59,583 |
| Notable People of WWII | 0 | - | 4.53 | 85,301 |
| WWII Trivia #2 | 0 | - | 4.52 | 103,388 |
| 1960s Decade Quiz #2 | 0 | - | 4.45 | 44,471 |
| World War I Quiz | 0 | - | 4.78 | 100,202 |
| WWI A-Z | 0 | - | 4.50 | 38,006 |
| Historical Middle Names - U.S. | 0 | - | 3.83 | 60,772 |
| Famous Mottos | 0 | - | 3.46 | 48,490 |
| Years in History #1 - Multiple Choice | 0 | - | 4.85 | 69,630 |
| Pasta... or Composer? | 0 | - | 4.63 | 26,510 |
| Songs with Food in the Title | 0 | - | 4.26 | 42,392 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,585,357 |
| Top 10 Oldest African Countries | 0 | - | 4.88 | 27,412 |
| Influential Women in History | 0 | - | 4.42 | 34,916 |
| Cradles of Civilization | 0 | - | 4.46 | 38,977 |
| Materials From History #1 | 0 | - | 4.56 | 50,533 |
| Historical Countries by Ruler | 0 | - | 4.48 | 48,007 |
| Recently Independent Countries | 0 | - | 4.98 | 157,916 |
| Biggest Nations and Empires Ever | 0 | - | 4.46 | 145,089 |
| Famous Explorers | 0 | - | 4.58 | 35,924 |
| Famous Empires by Description | 0 | - | 4.70 | 117,487 |
| Answers by Time Period | 0 | - | 4.63 | 55,243 |
| Nicknames in U.S. History | 0 | - | 4.25 | 31,573 |
| Historical Misquotes | 0 | - | 4.39 | 26,619 |
| All Modern-Day Countries Ever Controlled by Turkic People | 0 | - | 4.95 | 40,665 |
| All Modern-Day Countries Ever Controlled by Arab People with a Map | 0 | - | 4.98 | 54,832 |
| Countries by National Anthem | 0 | - | 4.92 | 71,005 |
| Best Selling Artists by Letter Quiz | 0 | - | 4.04 | 43,161 |
| Songs with Animals in the Title #1 | 0 | - | 4.36 | 128,996 |
| Songs with Body Parts in the Title | 0 | - | 4.31 | 214,466 |
| Word Scramble - Countries | 0 | - | 4.86 | 2,087,036 |
| Solve the Secret Country #1 | 0 | - | 4.94 | 162,984 |
| Solve the Secret Country #2 | 0 | - | 4.85 | 115,960 |
| Anagram Chain - Countries | 0 | - | 4.99 | 115,152 |
| 7 Deadly Sins | 0 | - | 4.88 | 394,519 |
| Most Popular NFL Jerseys | 0 | - | 4.19 | 236,389 |
| Top Five Countries By Category #1 | 0 | - | 4.99 | 446,576 |
| Countries with Four Letters | 0 | - | 4.99 | 418,258 |
| Random Symbol to Element | 0 | - | 4.88 | 92,145 |
| Random Capital to Country | 0 | - | 4.99 | 2,577,031 |
| Random Country to Capital | 0 | - | 4.98 | 911,002 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,508 |
| Name a Valid World City | 0 | - | 4.83 | 70,051 |
| Countries but all Vowels are Changed to O | 0 | - | 4.92 | 67,712 |
| Solve the Secret Country #3 | 0 | - | 4.98 | 63,099 |
| Former Flags | 0 | - | 4.97 | 106,581 |
| Years in History by Picture | 0 | - | 4.44 | 35,070 |
| Historical Events - AD or BC? | 0 | - | 4.70 | 57,160 |
| Materials From History #2 | 0 | - | 4.59 | 30,897 |
| Former Capitals | 0 | - | 4.88 | 71,112 |
| WWII Trivia #1 | 0 | - | 4.36 | 176,546 |
| WWII A-Z #1 | 0 | - | 4.80 | 102,331 |
| WWII A-Z #2 | 0 | - | 4.44 | 54,295 |
| WWII First Names | 0 | - | 4.44 | 41,544 |
| WWII Decoder | 0 | - | 4.41 | 53,016 |
| World War II Multiple Choice | 0 | - | 4.38 | 103,252 |
| Name a Valid Answer - World War II | 0 | - | 4.53 | 54,717 |
| 1960s Decade Quiz #1 | 0 | - | 4.40 | 49,696 |
| Cold War Decoder | 0 | - | 4.83 | 51,897 |
| Warsaw Pact Countries | 0 | - | 4.83 | 84,250 |
| 20th Century Dates Quiz | 0 | - | 4.56 | 39,305 |
| Events in History #2 | 0 | - | 4.49 | 71,398 |
| Events in History #4 | 0 | - | 4.44 | 44,081 |
| Name a Valid Year in History | 0 | - | 4.93 | 66,321 |
| Infamous Criminals - Mostly U.S. | 0 | - | 4.21 | 48,792 |
| Assassinations in History | 0 | - | 4.20 | 65,928 |
| Famous Seconds | 0 | - | 4.22 | 46,370 |
| Ages and Eras Quiz | 0 | - | 4.38 | 67,425 |
| Celebrity Knights of the United Kingdom | 0 | - | 4.23 | 39,380 |
| Titled People Quiz #1 | 0 | - | 4.10 | 45,592 |
| Titled People Quiz #3 | 0 | - | 4.34 | 43,014 |
| Job Titles Quiz #1 | 0 | - | 4.22 | 75,810 |
| Female Historical Figures | 0 | - | 4.31 | 33,081 |
| Historical Blunders | 0 | - | 4.33 | 91,645 |
| Territorial Accessions | 0 | - | 4.38 | 34,615 |
| People Known as "The Great" | 0 | - | 4.46 | 24,498 |
| This Day in History - July | 0 | - | 4.49 | 36,363 |
| This Day in History - August | 0 | - | 4.42 | 43,237 |
| This Day in History - September | 0 | - | 4.55 | 57,245 |
| This Day in History - October | 0 | - | 4.49 | 37,547 |
| This Day in History - January | 0 | - | 4.53 | 46,563 |
| This Day in History - March | 0 | - | 4.45 | 43,532 |
| Ancient Civilizations | 0 | - | 4.63 | 37,733 |
| The Places They Went #1 | 0 | - | 4.74 | 33,437 |
| Famous Inventors | 0 | - | 4.43 | 43,443 |
| Modern Day Countries of the Kushan Empire on a Map | 0 | - | 4.89 | 24,434 |
| European History for Dummies | 0 | - | 4.82 | 89,258 |
| 40 Historical People that Everyone Should Know | 0 | - | 4.09 | 1,010,369 |
| The Michael Jackson Quiz | 0 | - | 4.21 | 27,965 |
| Countries by Languages in 90 Seconds | 0 | - | 4.93 | 710,944 |
| Planets of the Solar System Quiz | 0 | - | 4.93 | 1,090,183 |
| Best-Selling Breakfast Cereals | 0 | - | 3.68 | 92,770 |
| Islands by Country #1 | 0 | - | 4.87 | 174,432 |
| Regions of Countries #1 | 0 | - | 4.97 | 158,871 |
| Regions of Countries #2 | 0 | - | 4.95 | 123,237 |
| Regions of Countries #3 | 0 | - | 4.84 | 90,307 |
| Crayola Crayon Colors 64 Pack | 0 | - | 4.99 | 61,999 |
| Countries by Emojis | 0 | - | 4.99 | 235,973 |
| Top Five Countries By Category #2 | 0 | - | 4.93 | 198,220 |
| Top Five Countries By Category #3 | 0 | - | 4.82 | 169,342 |
| Countries With One Word And Two O's | 0 | - | 4.94 | 55,062 |
| Country Chain | 0 | - | 4.96 | 215,623 |
| Can You Name These 50 Random Countries? | 0 | - | 4.98 | 213,618 |
| Capital Cities Chain | 0 | - | 4.84 | 81,864 |
| Name a Valid Capital #1 | 0 | - | 4.96 | 89,933 |
| Category Elimination - Countries #1 | 0 | - | 4.99 | 316,748 |
| Name a Valid Country #3 | 0 | - | 4.99 | 259,665 |
| Name a Valid Country #1 | 0 | - | 4.99 | 283,128 |
| Name a Valid Country #2 | 0 | - | 4.98 | 246,219 |
| Name a Valid Country #4 | 0 | - | 4.97 | 251,375 |
| Name a Valid Country #5 | 0 | - | 4.99 | 189,659 |
| Name a Valid Country #6 | 0 | - | 4.94 | 126,278 |
| Name a Valid Country #7 | 0 | - | 4.91 | 126,358 |
| Name a Valid Country #8 | 0 | - | 4.85 | 95,885 |
| Random Name a Valid Bordering Country | 0 | - | 4.99 | 74,146 |
| Name a Valid Country #10 | 0 | - | 4.93 | 41,335 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,228 |
| The 2nd Millennium BC | 0 | - | 4.64 | 20,683 |
| U.S. Celebrity Gossip by Year, 1991–2009 | 0 | - | 3.75 | 38,133 |
| Body Parts in History and Culture | 0 | - | 4.42 | 35,026 |
| History Analogies #1 | 0 | - | 4.53 | 89,759 |
| History Analogies #2 | 0 | - | 4.49 | 76,978 |
| Current Events by Year, 1990–2009 | 0 | - | 4.77 | 152,086 |
| Current Events by Year, 1970–1989 | 0 | - | 4.56 | 64,936 |
| Current Events by Year, 1930–1949 | 0 | - | 4.48 | 51,916 |
| History Analogies #3 | 0 | - | 4.61 | 80,413 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,113 |
| Which Came First? | 0 | - | 4.37 | 74,374 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,500 |
| Random History by Country | 0 | - | 4.53 | 34,644 |
| Valid Answer - World History #1 | 0 | - | 4.56 | 61,514 |
| Animals in World History | 0 | - | 4.74 | 44,199 |
| Places - Real or Fictional? | 0 | - | 4.59 | 49,341 |
| History True or False #3 | 0 | - | 4.43 | 55,886 |
| World Leaders of the Cold War | 0 | - | 4.27 | 25,112 |
| Five Most Guessed World Leaders by Country | 0 | - | 4.18 | 47,201 |
| A to Z: Legendary Creatures | 0 | - | 4.26 | 52,715 |
| Cold War Trivia #1 | 0 | - | 4.41 | 56,918 |
| Events in History #3 | 0 | - | 4.40 | 71,424 |
| Events in History #1 | 0 | - | 4.34 | 157,224 |
| Events in Ancient History | 0 | - | 4.50 | 35,683 |
| People Who Died Young #1 | 0 | - | 4.24 | 63,521 |
| Deaths by Date and Cause #1 | 0 | - | 4.37 | 94,865 |
| Deaths by Date and Cause #2 | 0 | - | 4.15 | 67,454 |
| Time Magazine Person of the Year | 0 | - | 4.53 | 73,509 |
| Countries That Were Invaded | 0 | - | 4.54 | 96,879 |
| Political Quotes | 0 | - | 4.17 | 19,800 |
| This Day in History - April | 0 | - | 4.40 | 44,383 |
| This Day in History - May | 0 | - | 4.33 | 48,241 |
| This Day in History - June | 0 | - | 4.36 | 33,428 |
| This Day in History - November | 0 | - | 4.24 | 33,528 |
| This Day in History - December | 0 | - | 4.32 | 40,443 |
| This Day in History - February | 0 | - | 4.38 | 39,693 |
| The 19th Century | 0 | - | 4.53 | 67,861 |
| The 18th Century | 0 | - | 4.52 | 53,106 |
| The 16th Century | 0 | - | 4.77 | 58,723 |
| The 9th and 10th Century | 0 | - | 4.54 | 37,527 |
| The 21st Century | 0 | - | 4.48 | 105,249 |
| Military History Vocabulary | 0 | - | 4.91 | 66,609 |
| History Multiple Choice #1 | 0 | - | 4.46 | 81,487 |
| Years in History #2 - Multiple Choice | 0 | - | 4.43 | 41,394 |
| History Multiple Choice #2 | 0 | - | 4.43 | 49,783 |
| History Multiple Choice #3 | 0 | - | 4.45 | 48,522 |
| History Multiple Choice #5 | 0 | - | 4.49 | 32,253 |
