| 1960s Decade Quiz #2 | 0 | - | 4.45 | 44,850 |
| 1960s Decade Quiz #1 | 0 | - | 4.40 | 49,986 |
| Recently Independent Countries | 0 | - | 4.98 | 158,858 |
| Warsaw Pact Countries | 0 | - | 4.83 | 84,428 |
| WWII Geography | 0 | - | 4.81 | 120,046 |
| 2016 News Stories - Name the Country | 0 | - | 4.45 | 23,373 |
| 1960s Celebrities by Picture #1 | 0 | - | 4.27 | 70,279 |
| 1960s Celebrities by Picture #2 | 0 | - | 4.26 | 51,317 |
| Highest Grossing 1960s Movies | 0 | - | 4.45 | 22,694 |
| 2019 News Stories - Name the Country | 0 | - | 4.21 | 18,395 |
| 2020 News Stories - Name the Country | 0 | - | 4.35 | 30,242 |
| 1960s Movie Trivia | 0 | - | 4.26 | 18,167 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,825 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,532 |
| Countries by Founding Story | 0 | - | 4.95 | 76,986 |
| 1950s Decade Quiz | 0 | - | 4.41 | 49,151 |
| Independence from Whom | 0 | - | 4.99 | 211,126 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,561 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,312 |
| 1970s Decade Quiz | 0 | - | 4.20 | 52,810 |
| 1960s Catchphrases | 0 | - | 4.14 | 104,468 |
| Top 10 Oldest African Countries | 0 | - | 4.88 | 27,838 |
| Countries of the World in 1900 | 0 | - | 4.89 | 84,406 |
| Countries of the World in 1914 with a Map | 0 | - | 4.99 | 194,516 |
| Countries of the World in 1945 with a Map | 0 | - | 5.00 | 150,174 |
| Countries Most Affected by the 2004 Tsunami | 0 | - | 4.01 | 19,588 |
| Historical City to Country | 0 | - | 4.84 | 78,390 |
| Countries by Former Name | 0 | - | 4.99 | 124,829 |
| Cities by Former Name | 0 | - | 4.84 | 91,360 |
| All Modern-Day Countries Ever Controlled by Turkic People | 0 | - | 4.94 | 40,920 |
| All Modern-Day Countries Ever Controlled by Arab People with a Map | 0 | - | 4.98 | 55,189 |
| 1960s American TV Trivia | 0 | - | 4.05 | 11,647 |
| Former Flags | 0 | - | 4.97 | 107,374 |
| Flags of Countries of the World in 1910 | 0 | - | 4.96 | 78,567 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 31,846 |
| Historic Orient Express Routes Map | 0 | - | 4.99 | 53,342 |
| Former Capitals | 0 | - | 4.88 | 71,343 |
| Battle to Country | 0 | - | 4.91 | 53,065 |
| Countries of Europe in 1444 | 0 | - | 4.92 | 99,363 |
| Countries of the World in 1444 | 0 | - | 4.98 | 60,024 |
| Modern-Day Countries of the Inca Empire on a Map | 0 | - | 4.83 | 57,233 |
| Modern-Day Countries of the Umayyad Caliphate on a Map | 0 | - | 4.98 | 68,556 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,748 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 76,028 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,167 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,627 |
| Modern Day Countries of the Kushan Empire on a Map | 0 | - | 4.89 | 24,765 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,520 |
| All Modern-Day Countries Ever Controlled by the Seljuks | 0 | - | 4.92 | 28,439 |
| Countries of Europe before World War II with a Map | 0 | - | 4.95 | 52,990 |
| Countries of the World in 1882 with a Map | 0 | - | 4.89 | 44,154 |
| Countries Settled by Vikings | 0 | - | 4.93 | 121,205 |
| Modern-Day Countries of the Holy Roman Empire on a Map | 0 | - | 4.93 | 45,516 |
| Fads of the 1960s | 0 | - | 4.00 | 11,458 |
| Former Countries | 0 | - | 4.75 | 133,081 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,359 |
| Damaged and Destroyed Cities | 0 | - | 4.44 | 44,607 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,515 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,100 |
| City Where It Happened #2 | 0 | - | 4.42 | 53,066 |
| City Where It Happened #3 | 0 | - | 4.53 | 40,363 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,683,752 |
| WWII Movies by Plot | 0 | - | 4.21 | 27,047 |
| Normandy D-Day Beaches | 0 | - | 4.83 | 40,336 |
| WWII Figures by Picture | 0 | - | 4.89 | 64,891 |
| Territory Changes in World War I | 0 | - | 4.87 | 46,603 |
| Countries by Independence Day | 0 | - | 4.61 | 52,698 |
| Ancient City to Country | 0 | - | 4.70 | 107,879 |
| Former Countries by Capital | 0 | - | 4.45 | 127,313 |
| City-States | 0 | - | 4.53 | 37,209 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,366 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,465 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 60,849 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,008 |
| All Modern-Day Countries Ever Controlled by Chinese People | 0 | - | 4.82 | 54,628 |
| All Modern-Day Countries Ever Controlled by Greeks | 0 | - | 4.97 | 53,871 |
| Name the English Monarchs | 0 | - | 4.91 | 500,982 |
| Rat Pack Members | 0 | - | 4.03 | 5,176 |
| Longest Uninterrupted Democracies | 0 | - | 4.04 | 33,162 |
| Most Recent Country To ... | 0 | - | 4.33 | 55,591 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,773 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,600 |
| Cities by Founder and Date | 0 | - | 4.56 | 29,083 |
| People Born on Islands | 0 | - | 4.39 | 52,856 |
| Colonies of Africa with a Map | 0 | - | 4.78 | 54,296 |
| Cities Where Famous People Died | 0 | - | 4.47 | 33,106 |
| City Where It Happened #1 | 0 | - | 4.24 | 106,262 |
| Countries of Europe in 1000 with a Map | 0 | - | 4.78 | 43,036 |
| Prime Ministers of the UK | 0 | - | 4.95 | 437,318 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 425,549 |
| Olympian Gods Quiz | 0 | - | 4.96 | 499,186 |
| The Trojan War | 0 | - | 4.83 | 39,623 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,408 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 125,345 |
| Roman Provinces on a Map | 0 | - | 4.54 | 36,814 |
| Axis Occupied Countries of WWII | 0 | - | 4.99 | 228,563 |
| WWI... or WWII? | 0 | - | 4.85 | 141,732 |
| Modern-Day Axis-Occupied Countries of WWII on a Map | 0 | - | 4.99 | 85,567 |
| Countries in World War I | 0 | - | 4.88 | 227,709 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,144 |
| Countries Unconquered since 1850 | 0 | - | 4.32 | 64,766 |
| History of Russia Quiz | 0 | - | 4.49 | 31,867 |
| Famous Immigrants and Exiles | 0 | - | 4.45 | 23,251 |
| History of Italy | 0 | - | 4.55 | 31,925 |
| Guerrillas by Country | 0 | - | 4.40 | 41,058 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,366 |
| Roman Emperors | 0 | - | 4.95 | 119,552 |
| Ancient Rome - True or False? | 0 | - | 4.85 | 42,805 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 645,593 |
| Name that Greek Letter | 0 | - | 4.93 | 322,911 |
| Ancient Greek Words | 0 | - | 4.93 | 111,246 |
| Modern-Day Countries of the Khmer Empire on a Map | 0 | - | 4.75 | 45,388 |
| Modern-Day Countries of the Mayan Civilization | 0 | - | 4.77 | 33,257 |
| All Modern-Day Countries Ever Controlled by French People | 0 | - | 4.99 | 57,860 |
| 1970s Celebrities by Picture #1 | 0 | - | 4.20 | 57,836 |
| 1970s Celebrities by Picture #2 | 0 | - | 4.21 | 50,581 |
| 1940s Celebrities by Picture | 0 | - | 4.43 | 47,924 |
| 1960s Music Trivia | 0 | - | 4.36 | 23,637 |
| Who Did That 1960s Song #1 | 0 | - | 4.38 | 47,428 |
| Who Did That 1960s Song #2 | 0 | - | 4.46 | 40,804 |
| Woodstock Performers | 0 | - | 4.55 | 10,626 |
| #1 Hits of the 1960s | 0 | - | 4.59 | 42,746 |
| Countries that Have Controlled Mesopotamia | 0 | - | 4.15 | 15,535 |
| Geography of the French Empire | 0 | - | 4.45 | 27,014 |
| History of India | 0 | - | 4.61 | 21,382 |
| History of Mexico | 0 | - | 4.58 | 15,287 |
| The Portuguese Empire | 0 | - | 4.58 | 12,043 |
| History of South Africa | 0 | - | 4.60 | 17,654 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.69 | 55,367 |
| History of Iran | 0 | - | 4.66 | 16,330 |
| History of The Netherlands | 0 | - | 4.46 | 17,393 |
| History of Austria | 0 | - | 4.70 | 17,826 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,380 |
| National Founders | 0 | - | 4.40 | 83,771 |
| Country by Photo of its Leader | 0 | - | 4.74 | 123,775 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,826 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 380,822 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 191,117 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,071 |
| Figures from Greek Mythology | 0 | - | 4.91 | 186,226 |
| Most Populous Countries in 1950 | 0 | - | 4.63 | 85,897 |
| Countries in World War II | 0 | - | 4.54 | 909,984 |
| Notable People of WWII | 0 | - | 4.53 | 85,551 |
| WWII Trivia #2 | 0 | - | 4.52 | 103,824 |
| World War I Quiz | 0 | - | 4.78 | 101,091 |
| WWI A-Z | 0 | - | 4.50 | 38,234 |
| Communist Countries in History | 0 | - | 4.63 | 494,565 |
| Political Movements by Country | 0 | - | 4.46 | 72,434 |
| Home Cities in History #1 | 0 | - | 4.04 | 16,552 |
| History of China | 0 | - | 4.37 | 56,994 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,453 |
| The Vikings! | 0 | - | 4.46 | 28,308 |
| The French Revolution | 0 | - | 4.46 | 23,889 |
| The Most Recent... United States | 0 | - | 4.45 | 18,394 |
| Byzantine History | 0 | - | 4.91 | 28,740 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 435,774 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,951 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,904 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,863 |
| NFL Football by Year, 2000–present | 0 | - | 4.26 | 28,002 |
| 2017 News Stories - Name the Country | 0 | - | 4.46 | 28,473 |
| 2018 News Stories - Name the Country | 0 | - | 4.42 | 23,817 |
| Movies by Year, 1990–2009 | 0 | - | 4.21 | 66,644 |
| Movies by Year, 1970–1989 | 0 | - | 4.38 | 25,399 |
| NBA Basketball by Year, 1970–1999 | 0 | - | 4.28 | 44,902 |
| NBA Basketball by Year, 2000–Present | 0 | - | 4.34 | 60,663 |
| Countries that Have Won the Most Battles | 0 | - | 4.02 | 39,499 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,216 |
| Ottoman Empire Quiz | 0 | - | 4.42 | 17,091 |
| Inventions by Country #1 | 0 | - | 4.46 | 54,976 |
| Inventions by Country #2 | 0 | - | 4.32 | 38,888 |
| Chinese Inventions | 0 | - | 4.30 | 33,772 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 73,392 |
| All Modern-Day Countries Ever Controlled by Germanic People | 0 | - | 4.47 | 28,977 |
| All Modern-Day Countries Ever Controlled by Slavic People | 0 | - | 4.16 | 28,522 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,294 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,233 |
| Geography of the British Empire | 0 | - | 4.48 | 39,618 |
| Medieval English History | 0 | - | 4.53 | 43,438 |
| History of France | 0 | - | 4.59 | 56,756 |
| 1980s Celebrities by Picture #2 | 0 | - | 4.19 | 71,545 |
| 1980s Celebrities by Picture #1 | 0 | - | 3.97 | 61,400 |
| 1990s Celebrities by Picture #1 | 0 | - | 4.13 | 79,260 |
| 1990s Celebrities by Picture #2 | 0 | - | 4.16 | 72,229 |
| Fresh Prince of Bel-Air Lyrics | 0 | - | 4.86 | 588,700 |
| Seinfeld Trivia | 0 | - | 4.57 | 35,096 |
| Main Friends Characters and Actors | 0 | - | 4.42 | 52,080 |
| Friends - Finish the Quote | 0 | - | 4.57 | 43,522 |
| 1970s Movie Trivia | 0 | - | 4.28 | 21,491 |
| Movies by Year, 1950–1969 | 0 | - | 4.48 | 22,047 |
| 2000s Celebrities by Picture #1 | 0 | - | 3.93 | 102,051 |
| 2000s Celebrities by Picture #2 | 0 | - | 4.15 | 95,052 |
| Characters from The Office | 0 | - | 4.48 | 46,129 |
| The Office Trivia #1 | 0 | - | 4.43 | 94,520 |
| Real Madrid 2010s Starting XI | 0 | - | 4.89 | 67,000 |
| Breaking Bad Trivia | 0 | - | 4.44 | 54,951 |
| 1950s Celebrities by Picture #1 | 0 | - | 4.24 | 51,090 |
| 1950s Celebrities by Picture #2 | 0 | - | 4.29 | 46,074 |
| 1930s Celebrities by Picture | 0 | - | 4.33 | 12,473 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,177 |
