| 1960s Decade Quiz #1 | 0 | - | 4.40 | 49,975 |
| Recently Independent Countries | 0 | - | 4.98 | 158,509 |
| Warsaw Pact Countries | 0 | - | 4.83 | 84,417 |
| WWII Geography | 0 | - | 4.81 | 120,008 |
| 2016 News Stories - Name the Country | 0 | - | 4.45 | 23,368 |
| 1960s Celebrities by Picture #1 | 0 | - | 4.27 | 70,267 |
| 1960s Celebrities by Picture #2 | 0 | - | 4.26 | 51,306 |
| Highest Grossing 1960s Movies | 0 | - | 4.45 | 22,688 |
| 2019 News Stories - Name the Country | 0 | - | 4.21 | 18,391 |
| 2020 News Stories - Name the Country | 0 | - | 4.35 | 30,234 |
| 1960s Movie Trivia | 0 | - | 4.26 | 18,164 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,764 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,516 |
| Countries by Founding Story | 0 | - | 4.95 | 76,960 |
| 1950s Decade Quiz | 0 | - | 4.41 | 49,143 |
| Independence from Whom | 0 | - | 4.99 | 211,048 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,503 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,290 |
| 1970s Decade Quiz | 0 | - | 4.20 | 52,799 |
| 1960s Catchphrases | 0 | - | 4.14 | 104,448 |
| Top 10 Oldest African Countries | 0 | - | 4.88 | 27,819 |
| Countries of the World in 1900 | 0 | - | 4.89 | 84,332 |
| Countries of the World in 1914 with a Map | 0 | - | 4.99 | 194,409 |
| Countries of the World in 1945 with a Map | 0 | - | 5.00 | 150,089 |
| Countries Most Affected by the 2004 Tsunami | 0 | - | 4.01 | 19,587 |
| Historical City to Country | 0 | - | 4.84 | 78,374 |
| Countries by Former Name | 0 | - | 4.99 | 124,788 |
| Cities by Former Name | 0 | - | 4.84 | 91,339 |
| All Modern-Day Countries Ever Controlled by Turkic People | 0 | - | 4.94 | 40,904 |
| All Modern-Day Countries Ever Controlled by Arab People with a Map | 0 | - | 4.98 | 55,168 |
| 1960s American TV Trivia | 0 | - | 4.05 | 11,645 |
| Former Flags | 0 | - | 4.97 | 107,323 |
| Flags of Countries of the World in 1910 | 0 | - | 4.96 | 78,526 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 31,817 |
| Historic Orient Express Routes Map | 0 | - | 4.99 | 53,315 |
| Former Capitals | 0 | - | 4.88 | 71,322 |
| Battle to Country | 0 | - | 4.91 | 53,031 |
| Countries of Europe in 1444 | 0 | - | 4.92 | 99,327 |
| Countries of the World in 1444 | 0 | - | 4.98 | 59,990 |
| Modern-Day Countries of the Inca Empire on a Map | 0 | - | 4.83 | 57,207 |
| Modern-Day Countries of the Umayyad Caliphate on a Map | 0 | - | 4.98 | 68,538 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,696 |
| Countries of Europe in 1848 | 0 | - | 4.99 | 75,982 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,113 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,593 |
| Modern Day Countries of the Kushan Empire on a Map | 0 | - | 4.89 | 24,742 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,481 |
| All Modern-Day Countries Ever Controlled by the Seljuks | 0 | - | 4.92 | 28,424 |
| Countries of Europe before World War II with a Map | 0 | - | 4.95 | 52,936 |
| Countries of the World in 1882 with a Map | 0 | - | 4.89 | 44,109 |
| Countries Settled by Vikings | 0 | - | 4.93 | 121,176 |
| Modern-Day Countries of the Holy Roman Empire on a Map | 0 | - | 4.93 | 45,491 |
| Fads of the 1960s | 0 | - | 4.00 | 11,457 |
| Former Countries | 0 | - | 4.75 | 133,054 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,346 |
| Damaged and Destroyed Cities | 0 | - | 4.44 | 44,600 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,469 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,038 |
| City Where It Happened #2 | 0 | - | 4.42 | 53,057 |
| City Where It Happened #3 | 0 | - | 4.53 | 40,351 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,681,253 |
| WWII Movies by Plot | 0 | - | 4.21 | 27,043 |
| Normandy D-Day Beaches | 0 | - | 4.83 | 40,326 |
| WWII Figures by Picture | 0 | - | 4.89 | 64,736 |
| Territory Changes in World War I | 0 | - | 4.87 | 46,579 |
| Countries by Independence Day | 0 | - | 4.61 | 52,696 |
| Ancient City to Country | 0 | - | 4.70 | 107,853 |
| Former Countries by Capital | 0 | - | 4.45 | 127,301 |
| City-States | 0 | - | 4.53 | 37,202 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,271 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,437 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 60,820 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 85,972 |
| All Modern-Day Countries Ever Controlled by Chinese People | 0 | - | 4.82 | 54,607 |
| All Modern-Day Countries Ever Controlled by Greeks | 0 | - | 4.97 | 53,845 |
| Name the English Monarchs | 0 | - | 4.91 | 500,756 |
| Rat Pack Members | 0 | - | 4.03 | 5,175 |
| Longest Uninterrupted Democracies | 0 | - | 4.04 | 33,157 |
| Most Recent Country To ... | 0 | - | 4.33 | 55,575 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,765 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,593 |
| Cities by Founder and Date | 0 | - | 4.56 | 29,078 |
| People Born on Islands | 0 | - | 4.39 | 52,845 |
| Colonies of Africa with a Map | 0 | - | 4.78 | 54,269 |
| Cities Where Famous People Died | 0 | - | 4.47 | 33,098 |
| City Where It Happened #1 | 0 | - | 4.24 | 106,253 |
| Countries of Europe in 1000 with a Map | 0 | - | 4.78 | 43,006 |
| Prime Ministers of the UK | 0 | - | 4.95 | 437,156 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 425,411 |
| Olympian Gods Quiz | 0 | - | 4.96 | 499,001 |
| The Trojan War | 0 | - | 4.83 | 39,611 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,356 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 125,289 |
| Roman Provinces on a Map | 0 | - | 4.54 | 36,802 |
| Axis Occupied Countries of WWII | 0 | - | 4.99 | 228,500 |
| WWI... or WWII? | 0 | - | 4.85 | 141,658 |
| Modern-Day Axis-Occupied Countries of WWII on a Map | 0 | - | 4.99 | 85,519 |
| Countries in World War I | 0 | - | 4.88 | 227,641 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,132 |
| Countries Unconquered since 1850 | 0 | - | 4.32 | 64,752 |
| History of Russia Quiz | 0 | - | 4.49 | 31,863 |
| Famous Immigrants and Exiles | 0 | - | 4.45 | 23,223 |
| History of Italy | 0 | - | 4.55 | 31,918 |
| Guerrillas by Country | 0 | - | 4.40 | 41,052 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,357 |
| Roman Emperors | 0 | - | 4.95 | 119,499 |
| Ancient Rome - True or False? | 0 | - | 4.85 | 42,795 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 645,321 |
| Name that Greek Letter | 0 | - | 4.93 | 322,833 |
| Ancient Greek Words | 0 | - | 4.93 | 111,215 |
| Modern-Day Countries of the Khmer Empire on a Map | 0 | - | 4.74 | 45,375 |
| Modern-Day Countries of the Mayan Civilization | 0 | - | 4.77 | 33,235 |
| All Modern-Day Countries Ever Controlled by French People | 0 | - | 4.99 | 57,843 |
| 1970s Celebrities by Picture #1 | 0 | - | 4.20 | 57,824 |
| 1970s Celebrities by Picture #2 | 0 | - | 4.21 | 50,574 |
| 1940s Celebrities by Picture | 0 | - | 4.43 | 47,916 |
| 1960s Music Trivia | 0 | - | 4.36 | 23,630 |
| Who Did That 1960s Song #1 | 0 | - | 4.38 | 47,421 |
| Who Did That 1960s Song #2 | 0 | - | 4.46 | 40,795 |
| Woodstock Performers | 0 | - | 4.55 | 10,624 |
| #1 Hits of the 1960s | 0 | - | 4.59 | 42,739 |
| Countries that Have Controlled Mesopotamia | 0 | - | 4.15 | 15,530 |
| Geography of the French Empire | 0 | - | 4.45 | 27,013 |
| History of India | 0 | - | 4.61 | 21,375 |
| History of Mexico | 0 | - | 4.58 | 15,283 |
| The Portuguese Empire | 0 | - | 4.58 | 12,040 |
| History of South Africa | 0 | - | 4.60 | 17,651 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.69 | 55,357 |
| History of Iran | 0 | - | 4.66 | 16,322 |
| History of The Netherlands | 0 | - | 4.46 | 17,382 |
| History of Austria | 0 | - | 4.70 | 17,820 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,342 |
| National Founders | 0 | - | 4.40 | 83,765 |
| Country by Photo of its Leader | 0 | - | 4.74 | 123,732 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,816 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 380,664 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 190,987 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,030 |
| Figures from Greek Mythology | 0 | - | 4.91 | 186,132 |
| Most Populous Countries in 1950 | 0 | - | 4.63 | 85,883 |
| Countries in World War II | 0 | - | 4.54 | 909,564 |
| Notable People of WWII | 0 | - | 4.53 | 85,537 |
| WWII Trivia #2 | 0 | - | 4.52 | 103,796 |
| World War I Quiz | 0 | - | 4.78 | 101,069 |
| WWI A-Z | 0 | - | 4.50 | 38,223 |
| Communist Countries in History | 0 | - | 4.63 | 494,399 |
| Political Movements by Country | 0 | - | 4.46 | 72,421 |
| Home Cities in History #1 | 0 | - | 4.04 | 16,547 |
| History of China | 0 | - | 4.37 | 56,972 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,447 |
| The Vikings! | 0 | - | 4.46 | 28,305 |
| The French Revolution | 0 | - | 4.46 | 23,883 |
| The Most Recent... United States | 0 | - | 4.45 | 18,388 |
| Byzantine History | 0 | - | 4.91 | 28,733 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 435,622 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,914 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,893 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,862 |
| NFL Football by Year, 2000–present | 0 | - | 4.26 | 27,992 |
| 2017 News Stories - Name the Country | 0 | - | 4.46 | 28,468 |
| 2018 News Stories - Name the Country | 0 | - | 4.42 | 23,814 |
| Movies by Year, 1990–2009 | 0 | - | 4.21 | 66,632 |
| Movies by Year, 1970–1989 | 0 | - | 4.38 | 25,396 |
| NBA Basketball by Year, 1970–1999 | 0 | - | 4.28 | 44,898 |
| NBA Basketball by Year, 2000–Present | 0 | - | 4.33 | 60,626 |
| Countries that Have Won the Most Battles | 0 | - | 4.02 | 39,488 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,192 |
| Ottoman Empire Quiz | 0 | - | 4.42 | 17,089 |
| Inventions by Country #1 | 0 | - | 4.46 | 54,970 |
| Inventions by Country #2 | 0 | - | 4.32 | 38,883 |
| Chinese Inventions | 0 | - | 4.30 | 33,767 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 73,340 |
| All Modern-Day Countries Ever Controlled by Belgium | 0 | - | 4.50 | 47,593 |
| All Modern-Day Countries Ever Controlled by Germanic People | 0 | - | 4.47 | 28,964 |
| All Modern-Day Countries Ever Controlled by Slavic People | 0 | - | 4.16 | 28,514 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,285 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,198 |
| Geography of the British Empire | 0 | - | 4.48 | 39,612 |
| Medieval English History | 0 | - | 4.53 | 43,429 |
| History of France | 0 | - | 4.59 | 56,715 |
| 1980s Celebrities by Picture #2 | 0 | - | 4.19 | 71,531 |
| 1980s Celebrities by Picture #1 | 0 | - | 3.97 | 61,386 |
| 1990s Celebrities by Picture #1 | 0 | - | 4.13 | 79,244 |
| 1990s Celebrities by Picture #2 | 0 | - | 4.16 | 72,211 |
| Fresh Prince of Bel-Air Lyrics | 0 | - | 4.86 | 588,643 |
| Seinfeld Trivia | 0 | - | 4.57 | 35,087 |
| Main Friends Characters and Actors | 0 | - | 4.42 | 52,071 |
| Friends - Finish the Quote | 0 | - | 4.57 | 43,504 |
| 1970s Movie Trivia | 0 | - | 4.28 | 21,488 |
| Movies by Year, 1950–1969 | 0 | - | 4.48 | 22,046 |
| 2000s Celebrities by Picture #1 | 0 | - | 3.93 | 102,033 |
| 2000s Celebrities by Picture #2 | 0 | - | 4.15 | 95,025 |
| Characters from The Office | 0 | - | 4.48 | 46,111 |
| The Office Trivia #1 | 0 | - | 4.43 | 94,486 |
| Real Madrid 2010s Starting XI | 0 | - | 4.89 | 66,924 |
| Breaking Bad Trivia | 0 | - | 4.44 | 54,931 |
| 1950s Celebrities by Picture #1 | 0 | - | 4.24 | 51,077 |
| 1950s Celebrities by Picture #2 | 0 | - | 4.29 | 46,063 |
| 1930s Celebrities by Picture | 0 | - | 4.33 | 12,466 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,174 |
