| 1960s Decade Quiz #2 | 0 | - | 4.45 | 44,730 |
| Recently Independent Countries | 0 | - | 4.98 | 158,380 |
| Warsaw Pact Countries | 0 | - | 4.83 | 84,367 |
| WWII Geography | 0 | - | 4.81 | 119,874 |
| 2016 News Stories - Name the Country | 0 | - | 4.45 | 23,354 |
| 1960s Celebrities by Picture #1 | 0 | - | 4.27 | 70,209 |
| 1960s Celebrities by Picture #2 | 0 | - | 4.26 | 51,263 |
| Highest Grossing 1960s Movies | 0 | - | 4.45 | 22,678 |
| 2019 News Stories - Name the Country | 0 | - | 4.21 | 18,379 |
| 2020 News Stories - Name the Country | 0 | - | 4.35 | 30,210 |
| 1960s Movie Trivia | 0 | - | 4.26 | 18,150 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,590 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,426 |
| Countries by Founding Story | 0 | - | 4.95 | 76,874 |
| 1950s Decade Quiz | 0 | - | 4.41 | 49,072 |
| Independence from Whom | 0 | - | 4.99 | 210,810 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,334 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,214 |
| 1970s Decade Quiz | 0 | - | 4.20 | 52,629 |
| 1960s Catchphrases | 0 | - | 4.14 | 104,388 |
| Top 10 Oldest African Countries | 0 | - | 4.88 | 27,763 |
| Countries of the World in 1900 | 0 | - | 4.89 | 84,148 |
| Countries of the World in 1914 with a Map | 0 | - | 4.99 | 194,127 |
| Countries of the World in 1945 with a Map | 0 | - | 5.00 | 149,828 |
| Countries Most Affected by the 2004 Tsunami | 0 | - | 4.01 | 19,573 |
| Historical City to Country | 0 | - | 4.84 | 78,328 |
| Countries by Former Name | 0 | - | 4.99 | 124,670 |
| Cities by Former Name | 0 | - | 4.84 | 91,266 |
| All Modern-Day Countries Ever Controlled by Turkic People | 0 | - | 4.94 | 40,850 |
| All Modern-Day Countries Ever Controlled by Arab People with a Map | 0 | - | 4.98 | 55,114 |
| 1960s American TV Trivia | 0 | - | 4.05 | 11,635 |
| Former Flags | 0 | - | 4.97 | 107,174 |
| Flags of Countries of the World in 1910 | 0 | - | 4.96 | 78,421 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,743 |
| Historic Orient Express Routes Map | 0 | - | 4.99 | 53,248 |
| Former Capitals | 0 | - | 4.88 | 71,281 |
| Battle to Country | 0 | - | 4.91 | 52,915 |
| Countries of Europe in 1444 | 0 | - | 4.92 | 99,183 |
| Countries of the World in 1444 | 0 | - | 4.98 | 59,895 |
| Modern-Day Countries of the Inca Empire on a Map | 0 | - | 4.83 | 57,127 |
| Modern-Day Countries of the Umayyad Caliphate on a Map | 0 | - | 4.98 | 68,465 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,541 |
| Countries of Europe in 1848 | 0 | - | 4.99 | 75,866 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,959 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,490 |
| Modern Day Countries of the Kushan Empire on a Map | 0 | - | 4.89 | 24,674 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,381 |
| All Modern-Day Countries Ever Controlled by the Seljuks | 0 | - | 4.91 | 28,389 |
| Countries of Europe before World War II with a Map | 0 | - | 4.95 | 52,780 |
| Countries of the World in 1882 with a Map | 0 | - | 4.89 | 43,993 |
| Countries Settled by Vikings | 0 | - | 4.93 | 121,100 |
| Modern-Day Countries of the Holy Roman Empire on a Map | 0 | - | 4.93 | 45,442 |
| Fads of the 1960s | 0 | - | 4.00 | 11,449 |
| Former Countries | 0 | - | 4.75 | 132,968 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,294 |
| Damaged and Destroyed Cities | 0 | - | 4.44 | 44,581 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,315 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,864 |
| City Where It Happened #2 | 0 | - | 4.42 | 53,040 |
| City Where It Happened #3 | 0 | - | 4.53 | 40,325 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,674,110 |
| WWII Movies by Plot | 0 | - | 4.21 | 27,027 |
| Normandy D-Day Beaches | 0 | - | 4.83 | 40,260 |
| WWII Figures by Picture | 0 | - | 4.89 | 63,950 |
| Territory Changes in World War I | 0 | - | 4.87 | 46,469 |
| Countries by Independence Day | 0 | - | 4.61 | 52,671 |
| Ancient City to Country | 0 | - | 4.70 | 107,794 |
| Former Countries by Capital | 0 | - | 4.45 | 127,244 |
| City-States | 0 | - | 4.53 | 37,182 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,790 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,348 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 60,686 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 85,851 |
| All Modern-Day Countries Ever Controlled by Chinese People | 0 | - | 4.82 | 54,535 |
| All Modern-Day Countries Ever Controlled by Greeks | 0 | - | 4.98 | 53,748 |
| Name the English Monarchs | 0 | - | 4.92 | 500,127 |
| Rat Pack Members | 0 | - | 4.03 | 5,171 |
| Longest Uninterrupted Democracies | 0 | - | 4.04 | 33,141 |
| Most Recent Country To ... | 0 | - | 4.33 | 55,526 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,716 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,567 |
| Cities by Founder and Date | 0 | - | 4.56 | 29,065 |
| People Born on Islands | 0 | - | 4.39 | 52,821 |
| Colonies of Africa with a Map | 0 | - | 4.78 | 54,197 |
| Cities Where Famous People Died | 0 | - | 4.47 | 33,081 |
| City Where It Happened #1 | 0 | - | 4.24 | 106,225 |
| Countries of Europe in 1000 with a Map | 0 | - | 4.78 | 42,929 |
| Prime Ministers of the UK | 0 | - | 4.96 | 436,648 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 425,011 |
| Olympian Gods Quiz | 0 | - | 4.96 | 498,426 |
| The Trojan War | 0 | - | 4.83 | 39,567 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,168 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 125,079 |
| Roman Provinces on a Map | 0 | - | 4.54 | 36,749 |
| Axis Occupied Countries of WWII | 0 | - | 4.99 | 228,274 |
| WWI... or WWII? | 0 | - | 4.85 | 141,413 |
| Modern-Day Axis-Occupied Countries of WWII on a Map | 0 | - | 4.99 | 85,365 |
| Countries in World War I | 0 | - | 4.88 | 227,420 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,092 |
| Countries Unconquered since 1850 | 0 | - | 4.32 | 64,722 |
| History of Russia Quiz | 0 | - | 4.49 | 31,844 |
| Famous Immigrants and Exiles | 0 | - | 4.45 | 23,121 |
| History of Italy | 0 | - | 4.55 | 31,898 |
| Guerrillas by Country | 0 | - | 4.40 | 41,029 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,288 |
| Roman Emperors | 0 | - | 4.95 | 119,244 |
| Ancient Rome - True or False? | 0 | - | 4.85 | 42,755 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 644,636 |
| Name that Greek Letter | 0 | - | 4.93 | 322,551 |
| Ancient Greek Words | 0 | - | 4.93 | 111,100 |
| Modern-Day Countries of the Khmer Empire on a Map | 0 | - | 4.74 | 45,316 |
| Modern-Day Countries of the Mayan Civilization | 0 | - | 4.77 | 33,176 |
| All Modern-Day Countries Ever Controlled by French People | 0 | - | 4.99 | 57,768 |
| 1970s Celebrities by Picture #1 | 0 | - | 4.20 | 57,775 |
| 1970s Celebrities by Picture #2 | 0 | - | 4.21 | 50,535 |
| 1940s Celebrities by Picture | 0 | - | 4.43 | 47,882 |
| 1960s Music Trivia | 0 | - | 4.36 | 23,606 |
| Who Did That 1960s Song #1 | 0 | - | 4.38 | 47,395 |
| Who Did That 1960s Song #2 | 0 | - | 4.46 | 40,770 |
| Woodstock Performers | 0 | - | 4.55 | 10,616 |
| #1 Hits of the 1960s | 0 | - | 4.59 | 42,691 |
| Countries that Have Controlled Mesopotamia | 0 | - | 4.15 | 15,520 |
| Geography of the French Empire | 0 | - | 4.45 | 26,999 |
| History of India | 0 | - | 4.61 | 21,350 |
| History of Mexico | 0 | - | 4.58 | 15,261 |
| The Portuguese Empire | 0 | - | 4.58 | 12,028 |
| History of South Africa | 0 | - | 4.60 | 17,637 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.69 | 55,315 |
| History of Iran | 0 | - | 4.66 | 16,307 |
| History of The Netherlands | 0 | - | 4.46 | 17,361 |
| History of Austria | 0 | - | 4.70 | 17,800 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,281 |
| National Founders | 0 | - | 4.40 | 83,738 |
| Country by Photo of its Leader | 0 | - | 4.74 | 123,624 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,796 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 380,390 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 190,695 |
| Play-Doh Presidents | 0 | - | 5.00 | 81,941 |
| Figures from Greek Mythology | 0 | - | 4.91 | 185,854 |
| Most Populous Countries in 1950 | 0 | - | 4.63 | 85,847 |
| Countries in World War II | 0 | - | 4.54 | 908,424 |
| Notable People of WWII | 0 | - | 4.53 | 85,482 |
| WWII Trivia #2 | 0 | - | 4.52 | 103,711 |
| World War I Quiz | 0 | - | 4.78 | 100,563 |
| WWI A-Z | 0 | - | 4.50 | 38,158 |
| Communist Countries in History | 0 | - | 4.63 | 493,913 |
| Political Movements by Country | 0 | - | 4.46 | 72,393 |
| Home Cities in History #1 | 0 | - | 4.04 | 16,544 |
| History of China | 0 | - | 4.37 | 56,919 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,423 |
| The Vikings! | 0 | - | 4.46 | 28,287 |
| The French Revolution | 0 | - | 4.46 | 23,862 |
| The Most Recent... United States | 0 | - | 4.45 | 18,368 |
| Byzantine History | 0 | - | 4.91 | 28,704 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 435,155 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,836 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,870 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,842 |
| NFL Football by Year, 2000–present | 0 | - | 4.26 | 27,959 |
| 2017 News Stories - Name the Country | 0 | - | 4.46 | 28,451 |
| 2018 News Stories - Name the Country | 0 | - | 4.42 | 23,802 |
| Movies by Year, 1990–2009 | 0 | - | 4.21 | 66,608 |
| Movies by Year, 1970–1989 | 0 | - | 4.38 | 25,389 |
| NBA Basketball by Year, 1970–1999 | 0 | - | 4.28 | 44,864 |
| NBA Basketball by Year, 2000–Present | 0 | - | 4.33 | 60,518 |
| Countries that Have Won the Most Battles | 0 | - | 4.02 | 39,457 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,147 |
| Ottoman Empire Quiz | 0 | - | 4.42 | 17,077 |
| Inventions by Country #1 | 0 | - | 4.46 | 54,941 |
| Inventions by Country #2 | 0 | - | 4.32 | 38,868 |
| Chinese Inventions | 0 | - | 4.30 | 33,756 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 73,157 |
| All Modern-Day Countries Ever Controlled by Belgium | 0 | - | 4.50 | 47,507 |
| All Modern-Day Countries Ever Controlled by Germanic People | 0 | - | 4.47 | 28,936 |
| All Modern-Day Countries Ever Controlled by Slavic People | 0 | - | 4.16 | 28,475 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,264 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,095 |
| Geography of the British Empire | 0 | - | 4.48 | 39,584 |
| Medieval English History | 0 | - | 4.53 | 43,403 |
| History of France | 0 | - | 4.59 | 56,631 |
| 1980s Celebrities by Picture #2 | 0 | - | 4.19 | 71,461 |
| 1980s Celebrities by Picture #1 | 0 | - | 3.97 | 61,346 |
| 1990s Celebrities by Picture #1 | 0 | - | 4.13 | 79,183 |
| 1990s Celebrities by Picture #2 | 0 | - | 4.16 | 72,140 |
| Fresh Prince of Bel-Air Lyrics | 0 | - | 4.86 | 588,427 |
| Seinfeld Trivia | 0 | - | 4.57 | 35,061 |
| Main Friends Characters and Actors | 0 | - | 4.42 | 52,031 |
| Friends - Finish the Quote | 0 | - | 4.57 | 43,389 |
| 1970s Movie Trivia | 0 | - | 4.28 | 21,479 |
| Movies by Year, 1950–1969 | 0 | - | 4.48 | 22,036 |
| 2000s Celebrities by Picture #1 | 0 | - | 3.93 | 101,944 |
| 2000s Celebrities by Picture #2 | 0 | - | 4.15 | 94,904 |
| Characters from The Office | 0 | - | 4.48 | 46,079 |
| The Office Trivia #1 | 0 | - | 4.43 | 94,396 |
| Real Madrid 2010s Starting XI | 0 | - | 4.89 | 66,743 |
| Breaking Bad Trivia | 0 | - | 4.44 | 54,858 |
| 1950s Celebrities by Picture #1 | 0 | - | 4.24 | 51,035 |
| 1950s Celebrities by Picture #2 | 0 | - | 4.29 | 46,027 |
| 1930s Celebrities by Picture | 0 | - | 4.33 | 12,421 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,154 |
