| Highest Grossing 1960s Movies | 0 | - | 4.45 | 22,864 |
| 1960s Movie Trivia | 0 | - | 4.26 | 18,443 |
| 1970s Movie Trivia | 0 | - | 4.28 | 21,865 |
| 1960s Celebrities by Picture #1 | 0 | - | 4.27 | 70,859 |
| 1960s Celebrities by Picture #2 | 0 | - | 4.26 | 51,741 |
| Movies by Year, 1950–1969 | 0 | - | 4.48 | 22,142 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 95,391 |
| Countries by Founding Story | 0 | - | 4.95 | 77,961 |
| Independence from Whom | 0 | - | 4.99 | 213,581 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 133,782 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,970 |
| 1940s Celebrities by Picture | 0 | - | 4.43 | 48,259 |
| Highest Grossing 1970s Movies | 0 | - | 4.30 | 29,608 |
| 2017 News Stories - Name the Country | 0 | - | 4.46 | 28,653 |
| 2018 News Stories - Name the Country | 0 | - | 4.42 | 23,954 |
| 1970s Celebrities by Picture #1 | 0 | - | 4.20 | 58,346 |
| 1970s Celebrities by Picture #2 | 0 | - | 4.21 | 51,040 |
| Countries of the World in 1900 | 0 | - | 4.89 | 86,323 |
| Countries of the World in 1914 with a Map | 0 | - | 4.99 | 197,249 |
| Countries of the World in 1945 with a Map | 0 | - | 5.00 | 152,637 |
| Recently Independent Countries | 0 | - | 4.98 | 160,597 |
| Historical City to Country | 0 | - | 4.85 | 79,129 |
| Countries by Former Name | 0 | - | 4.99 | 126,051 |
| Cities by Former Name | 0 | - | 4.83 | 92,230 |
| 1950s Celebrities by Picture #1 | 0 | - | 4.24 | 51,421 |
| 1950s Celebrities by Picture #2 | 0 | - | 4.29 | 46,398 |
| 1980s Celebrities by Picture #2 | 0 | - | 4.19 | 72,242 |
| 1990s Celebrities by Picture #1 | 0 | - | 4.14 | 79,887 |
| 1990s Celebrities by Picture #2 | 0 | - | 4.16 | 72,966 |
| 1960s Music Trivia | 0 | - | 4.36 | 23,809 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 70,870 |
| Former Capitals | 0 | - | 4.88 | 71,752 |
| Warsaw Pact Countries | 0 | - | 4.83 | 85,026 |
| Most Populous Countries by Year | 0 | - | 4.83 | 111,752 |
| 2016 News Stories - Name the Country | 0 | - | 4.45 | 23,495 |
| MLB Baseball by Year, 1960–1989 | 0 | - | 4.09 | 18,720 |
| NFL Football by Year, 1967–1999 | 0 | - | 4.34 | 25,514 |
| MLB Baseball by Year, 1990–present | 0 | - | 4.02 | 15,082 |
| First Countries to Reach 5 Million People | 0 | - | 4.93 | 136,081 |
| Most Populous Modern-Day Countries in 1000 AD | 0 | - | 4.88 | 76,655 |
| Most Populous Modern-Day Countries in 1 AD | 0 | - | 4.98 | 93,336 |
| Most Populous Modern-Day Countries in 1800 AD | 0 | - | 4.93 | 67,598 |
| Most Populous Modern-Day Countries in 1500 AD | 0 | - | 4.93 | 73,966 |
| Most Populous Modern-Day Countries by Century | 0 | - | 4.98 | 97,928 |
| Countries of Europe in 1444 | 0 | - | 4.92 | 100,863 |
| Countries of the World in 1444 | 0 | - | 4.98 | 60,901 |
| Modern-Day Countries of the Inca Empire on a Map | 0 | - | 4.83 | 58,033 |
| Countries of Europe before World War II with a Map | 0 | - | 4.95 | 54,410 |
| Countries Settled by Vikings | 0 | - | 4.92 | 122,231 |
| 1960s Catchphrases | 0 | - | 4.14 | 105,170 |
| Former Countries | 0 | - | 4.77 | 134,358 |
| Damaged and Destroyed Cities | 0 | - | 4.44 | 44,871 |
| Flags of Countries of the World in 1910 | 0 | - | 4.96 | 79,657 |
| City Where It Happened #2 | 0 | - | 4.42 | 53,370 |
| City Where It Happened #3 | 0 | - | 4.53 | 40,703 |
| Countries by Independence Day | 0 | - | 4.62 | 52,890 |
| Ancient City to Country | 0 | - | 4.72 | 108,425 |
| Former Countries by Capital | 0 | - | 4.45 | 127,927 |
| City-States | 0 | - | 4.53 | 37,447 |
| Battle to Country | 0 | - | 4.91 | 54,176 |
| Most Populous Countries in 1900 | 0 | - | 4.91 | 174,432 |
| Modern-Day Countries of the Umayyad Caliphate on a Map | 0 | - | 4.98 | 69,352 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,666 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 86,299 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 66,123 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.97 | 72,098 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,799 |
| Modern-Day Countries of the Holy Roman Empire on a Map | 0 | - | 4.93 | 46,021 |
| 1930s Celebrities by Picture | 0 | - | 4.33 | 12,770 |
| 1980s Celebrities by Picture #1 | 0 | - | 3.97 | 61,880 |
| Real Madrid 2010s Starting XI | 0 | - | 4.90 | 69,205 |
| 1960s American TV Trivia | 0 | - | 4.05 | 11,690 |
| Sports in Movies | 0 | - | 4.06 | 187,674 |
| Longest Uninterrupted Democracies | 0 | - | 4.04 | 33,312 |
| Most Recent Country To ... | 0 | - | 4.33 | 55,983 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 117,203 |
| Cities by Founder and Date | 0 | - | 4.56 | 29,179 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,772 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 119,150 |
| Cities Where Famous People Died | 0 | - | 4.47 | 33,298 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 81,870 |
| City Where It Happened #1 | 0 | - | 4.23 | 106,810 |
| Countries of Europe in 1000 with a Map | 0 | - | 4.78 | 43,846 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,733,644 |
| Countries Unconquered since 1850 | 0 | - | 4.32 | 64,982 |
| Guerrillas by Country | 0 | - | 4.40 | 41,265 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 192,107 |
| 2019 News Stories - Name the Country | 0 | - | 4.21 | 18,530 |
| 2020 News Stories - Name the Country | 0 | - | 4.35 | 30,475 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 73,148 |
| Countries of Iberia in History with a Map | 0 | - | 4.88 | 42,580 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 61,865 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 87,085 |
| All Modern-Day Countries Ever Controlled by Chinese People | 0 | - | 4.81 | 55,339 |
| Fads of the 1960s | 0 | - | 4.00 | 11,527 |
| The John F. Kennedy Presidency | 0 | - | 4.47 | 43,976 |
| Monty Python Quotes | 0 | - | 4.89 | 42,637 |
| Movie Cities | 0 | - | 4.33 | 51,006 |
| Countries of Asia in 1900 | 0 | - | 4.50 | 58,365 |
| Colonies of Africa with a Map | 0 | - | 4.79 | 54,859 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 166,702 |
| Countries Bordering China Since 1914 | 0 | - | 4.93 | 95,980 |
| Former Country Flag-Shape Picture Quiz | 0 | - | 4.98 | 90,386 |
| Axis Occupied Countries of WWII | 0 | - | 4.99 | 230,878 |
| Modern-Day Axis-Occupied Countries of WWII on a Map | 0 | - | 4.99 | 86,863 |
| Countries in World War I | 0 | - | 4.88 | 229,539 |
| Cities in European History #1 | 0 | - | 4.63 | 134,990 |
| 1940s Decade Quiz | 0 | - | 4.51 | 52,519 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 83,620 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 105,077 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 90,169 |
| Modern-Day Countries of the Khmer Empire on a Map | 0 | - | 4.77 | 45,934 |
| Modern-Day Countries of the Mayan Civilization | 0 | - | 4.78 | 33,793 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 70,701 |
| All Modern-Day Countries Ever Controlled by French People | 0 | - | 4.99 | 58,663 |
| Commonwealth of Nations Countries | 0 | - | 4.95 | 238,690 |
| Rat Pack Members | 0 | - | 4.03 | 5,205 |
| 1990s Movie Trivia #1 | 0 | - | 4.38 | 53,202 |
| 1990s Movie Trivia #2 | 0 | - | 4.40 | 42,021 |
| 1980s Movie Trivia #1 | 0 | - | 4.58 | 31,552 |
| Name the James Bond Movies | 0 | - | 4.56 | 159,697 |
| James Bond Trivia | 0 | - | 4.46 | 39,447 |
| Presidential Actors | 0 | - | 4.36 | 19,270 |
| Biggest British Empire Countries | 0 | - | 4.74 | 100,655 |
| Biggest French Empire Countries | 0 | - | 4.49 | 65,422 |
| Country by Photo of its Leader | 0 | - | 4.70 | 124,794 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 429,030 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 384,037 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 194,152 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,996 |
| Most Populous Countries in 1950 | 0 | - | 4.63 | 86,618 |
| Countries Most Affected by the 2004 Tsunami | 0 | - | 4.01 | 19,677 |
| Countries in World War II | 0 | - | 4.55 | 920,867 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 104,723 |
| Neutral European Countries of WWII | 0 | - | 4.92 | 162,627 |
| Countries of Europe After World War II | 0 | - | 4.99 | 189,761 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 157,823 |
| Communist Countries in History | 0 | - | 4.63 | 499,006 |
| Countries of the Soviet Union | 0 | - | 4.98 | 195,762 |
| Political Movements by Country | 0 | - | 4.46 | 72,854 |
| Home Cities in History #1 | 0 | - | 4.04 | 16,623 |
| Biggest Roman Empire Countries | 0 | - | 4.87 | 102,476 |
| Modern-Day Countries of the Roman Empire on a Map | 0 | - | 4.99 | 127,158 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.89 | 114,670 |
| 20th Century A-Z | 0 | - | 4.50 | 54,083 |
| 1970s Decade Quiz | 0 | - | 4.23 | 61,099 |
| 1980s Decade Quiz | 0 | - | 4.38 | 86,234 |
| 1910s Decade Quiz | 0 | - | 4.21 | 52,931 |
| 1930s Decade Quiz | 0 | - | 4.21 | 49,396 |
| 1920s Decade Quiz | 0 | - | 4.33 | 50,058 |
| Inventions by Country #1 | 0 | - | 4.47 | 55,218 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 75,692 |
| 1970s Music Trivia | 0 | - | 4.29 | 31,841 |
| 1990s Music Trivia #1 | 0 | - | 4.28 | 51,105 |
| 1990s Music Trivia #2 | 0 | - | 4.06 | 35,890 |
| FC Barcelona 2010s Starting XI | 0 | - | 4.65 | 73,467 |
| Who Did That 1960s Song #1 | 0 | - | 4.38 | 47,844 |
| Who Did That 1960s Song #2 | 0 | - | 4.46 | 41,236 |
| Woodstock Performers | 0 | - | 4.55 | 10,696 |
| #1 Hits of the 1960s | 0 | - | 4.59 | 43,079 |
| 1980s Movie Trivia #2 | 0 | - | 4.28 | 20,854 |
| Sports Movie Quotes Quiz | 0 | - | 4.24 | 20,407 |
| Anchorman Quotes | 0 | - | 3.73 | 9,723 |
| Movies Set in France | 0 | - | 4.26 | 13,166 |
| Movies with Landforms in the Name | 0 | - | 4.16 | 50,587 |
| Cities Founded by the French in North America | 0 | - | 4.50 | 40,522 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.69 | 55,726 |
| Countries Once Held by Sweden | 0 | - | 4.18 | 34,878 |
| National Founders | 0 | - | 4.40 | 84,010 |
| Dave the Dragon's Collection of Country Shapes | 0 | - | 4.46 | 20,799 |
| Important Cities in WWII | 0 | - | 4.42 | 94,320 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 146,177 |
| Soviet Union Country Quiz | 0 | - | 4.91 | 81,266 |
| Events in U.S. History | 0 | - | 4.41 | 28,870 |
| Home Cities in History Quiz #2 | 0 | - | 3.83 | 16,995 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,342 |
| People on Money - United States | 0 | - | 4.31 | 63,519 |
| American Founding Fathers | 0 | - | 4.42 | 23,311 |
| Old West History | 0 | - | 4.34 | 15,311 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,643 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.09 | 54,602 |
| Six Flags Over Texas | 0 | - | 4.78 | 63,695 |
| Life of Benjamin Franklin | 0 | - | 4.24 | 6,540 |
| American Revolution - Multiple Choice | 0 | - | 4.34 | 20,001 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,227 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,814 |
| U.S. History for Dummies | 0 | - | 4.47 | 83,539 |
| The American Civil War | 0 | - | 4.62 | 52,685 |
| Countries in the Byzantine Empire | 0 | - | 4.95 | 72,588 |
| Countries Settled by the Ancient Greeks | 0 | - | 4.54 | 49,706 |
| Quiz on the Year 1908 | 0 | - | 4.25 | 13,013 |
| NBA Basketball by Year, 1970–1999 | 0 | - | 4.28 | 45,196 |
| NBA Basketball by Year, 2000–Present | 0 | - | 4.34 | 61,509 |
| 1900s Decade Quiz | 0 | - | 4.18 | 44,475 |
| 1990s Decade Quiz | 0 | - | 4.00 | 63,080 |
| Countries that Have Won the Most Battles | 0 | - | 4.01 | 39,833 |
| Inventions by Country #2 | 0 | - | 4.32 | 39,032 |
| Most Populous Countries in 1800 | 0 | - | 4.33 | 42,320 |
| Modern Day Countries of the Portuguese Empire on a Map | 0 | - | 4.56 | 52,321 |
| Modern Day Countries of the Mughal Empire on a Map | 0 | - | 4.43 | 33,927 |
