| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 128,655 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,651,846 |
| Vietnam War Countries | 0 | - | 4.83 | 93,577 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 423,493 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 379,464 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 189,730 |
| Play-Doh Presidents | 0 | - | 5.00 | 81,643 |
| American Revolution Decoder | 0 | - | 4.10 | 20,873 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 143,098 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 303,299 |
| Random U.S. States on a Map | 0 | - | 4.96 | 621,147 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,282 |
| Pixelated United States Map | 0 | - | 4.89 | 93,428 |
| U.S. Vice Presidents | 0 | - | 4.41 | 134,858 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 107,905 |
| U.S. Presidents by Event | 0 | - | 4.58 | 33,425 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 92,965 |
| Presidential Middle Names | 0 | - | 4.41 | 59,672 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 52,701 |
| Assassinated U.S. Presidents | 0 | - | 4.61 | 93,782 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,154 |
| Most-Visited Countries by U.S. Presidents | 0 | - | 4.96 | 192,477 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,193 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,725 |
| U.S. President Scramble | 0 | - | 4.40 | 116,173 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 69,368 |
| The John F. Kennedy Presidency | 0 | - | 4.47 | 43,469 |
| Biggest Cities in the Confederate States in 1860 | 0 | - | 4.41 | 23,550 |
| Random Sequential U.S. States on a Map | 0 | - | 4.99 | 233,115 |
| U.S. Map with Random Merged States | 0 | - | 4.94 | 299,934 |
| Countries of the German Empire | 0 | - | 4.51 | 37,648 |
| United States Map Quiz | 0 | - | 4.98 | 4,140,847 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,161 |
| First Ladies of the United States | 0 | - | 4.28 | 85,224 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,810 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,107 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 76,232 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 15,995 |
| Add a Letter - Make a U.S. President | 0 | - | 4.61 | 23,824 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,678 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 160,415 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 87,993 |
| Third Most Common Language by U.S. State | 0 | - | 4.89 | 113,365 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,358 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,083 |
| The Jimmy Carter Presidency | 0 | - | 4.41 | 19,026 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,438 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,014 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,687 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 67,266 |
| Countries of Europe After World War II | 0 | - | 4.99 | 186,644 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 155,291 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 103,841 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 105,804 |
| U.S. State Border Crossings | 0 | - | 4.97 | 95,921 |
| Name the U.S. National Parks | 0 | - | 4.86 | 58,681 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,264 |
| Total United States Immigration by Country | 0 | - | 4.91 | 110,605 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 74,824 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 173,098 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 240,586 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 327,751 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,505 |
| Win the U.S. Presidential Election | 0 | - | 4.80 | 618,031 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 28,457 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 19,957 |
| The George Washington Presidency | 0 | - | 4.03 | 14,473 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,655 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,487 |
| The John Adams Presidency | 0 | - | 4.12 | 8,675 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,865 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,679 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,204 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,606 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,768 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 73,021 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.84 | 65,586 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 39,466 |
| US States Quiz | 0 | - | 5.00 | 16,691,083 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 365,176 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 148,862 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,360 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,323 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,053 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 55,968 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 114,721 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,188 |
| Flags of Countries of the World in 1910 | 0 | - | 4.96 | 77,985 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 80,636 |
| Every African Country Shape | 0 | - | 4.90 | 85,995 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 38,789 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 108,393 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 90,803 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 145,350 |
| Countries that Beat the United States | 0 | - | 4.93 | 165,488 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,369 |
| Presidential Actors | 0 | - | 4.36 | 19,053 |
| The Bill Clinton Presidency | 0 | - | 4.22 | 31,350 |
| The George H. W. Bush Presidency | 0 | - | 4.36 | 21,416 |
| The Ronald Reagan Presidency | 0 | - | 4.26 | 24,715 |
| The Richard Nixon Presidency | 0 | - | 4.05 | 21,918 |
| The Barack Obama Presidency | 0 | - | 4.16 | 25,247 |
| Six Flags Over Texas | 0 | - | 4.79 | 62,993 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 32,985 |
| U.S. History for Dummies | 0 | - | 4.47 | 82,450 |
| The American Civil War | 0 | - | 4.62 | 52,118 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 116,670 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 501,556 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 110,305 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 112,353 |
| U.S. States with Short Names | 0 | - | 4.91 | 147,580 |
| U.S. States that Start with M | 0 | - | 4.93 | 185,848 |
| U.S. States By Population | 0 | - | 4.92 | 152,313 |
| U.S. States that Start with N | 0 | - | 4.95 | 170,341 |
| U.S. States with Longest Names | 0 | - | 4.84 | 43,825 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 47,523 |
| US States with an Empty Map | 0 | - | 5.00 | 618,504 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 81,867 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 87,501 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 63,737 |
| The Only Remaining U.S. State . . . | 0 | - | 4.92 | 64,843 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 158,831 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 177,053 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 124,448 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,050 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 85,642 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,038 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 81,908 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.84 | 66,798 |
| Every European Country Shape | 0 | - | 4.96 | 200,041 |
| U.S. States or European Countries by Area | 0 | - | 4.94 | 94,639 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 131,865 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 164,429 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 102,472 |
| Countries of the Italian Empire | 0 | - | 4.21 | 27,532 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,301 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 60,331 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,112 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 85,449 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 97,803 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 236,153 |
| Every Asian Country Shape | 0 | - | 4.95 | 86,608 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 69,173 |
| The Iraq War | 0 | - | 4.47 | 15,547 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,238 |
| Countries Bordering China Since 1914 | 0 | - | 4.93 | 94,688 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 88,379 |
| Former Country Flag-Shape Picture Quiz | 0 | - | 4.97 | 82,801 |
| Countries in an Egg of the World Map | 0 | - | 4.91 | 63,787 |
| Africa Flags Map Quiz | 0 | - | 4.94 | 35,882 |
| Random African Countries on a Map | 0 | - | 4.99 | 293,251 |
| Africa Map with Random Merged Countries | 0 | - | 4.95 | 72,353 |
| Random African Flag to Country | 0 | - | 4.87 | 74,172 |
| Eastern Africa Map Quiz | 0 | - | 4.98 | 78,108 |
| Random American Countries on a Map | 0 | - | 4.96 | 98,584 |
| South America Flags Map Quiz | 0 | - | 4.95 | 86,520 |
| Rivers of the United States | 0 | - | 4.93 | 65,471 |
| U.S. Cities by Picture #1 | 0 | - | 4.37 | 34,342 |
| Cities by Picture #2 | 0 | - | 4.19 | 34,927 |
| Countries Closest to United States A-Z | 0 | - | 4.81 | 117,374 |
| Topological Map of the USA Quiz | 0 | - | 4.49 | 28,836 |
| U.S. Senators by State | 0 | - | 4.44 | 39,742 |
| Top 10 U.S. States by Republican Party Support | 0 | - | 4.44 | 75,085 |
| Top 10 U.S. States by Democratic Party Support | 0 | - | 4.63 | 80,845 |
| Top 10 U.S. Swing States in the 2024 Election | 0 | - | 4.51 | 74,887 |
| American Founding Fathers | 0 | - | 4.41 | 23,070 |
| The American Revolution | 0 | - | 4.52 | 54,045 |
| Countries Closest to Alaska | 0 | - | 4.93 | 123,262 |
| Stephen Curry Quiz | 0 | - | 4.36 | 66,306 |
| History of Florida | 0 | - | 4.45 | 9,760 |
| The Life of Martin Luther King Jr. | 0 | - | 4.73 | 11,054 |
| Hawaiian Islands | 0 | - | 4.83 | 42,418 |
| Countries Closest to Maine | 0 | - | 4.84 | 66,404 |
| Harvard University | 0 | - | 4.15 | 8,259 |
| History of Texas | 0 | - | 4.43 | 14,548 |
| LeBron James Trivia | 0 | - | 4.01 | 169,835 |
| LeBron... or Kobe? | 0 | - | 4.04 | 69,156 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,073 |
| Washington D.C. by Picture | 0 | - | 4.49 | 26,644 |
| American History Quotes #1 | 0 | - | 4.37 | 95,675 |
| People on Money - United States | 0 | - | 4.31 | 63,200 |
| American History Quotes #2 | 0 | - | 4.38 | 41,221 |
| Old West History | 0 | - | 4.33 | 15,220 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,228 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 44,717 |
| Life of Benjamin Franklin | 0 | - | 4.24 | 6,488 |
| American Revolution - Multiple Choice | 0 | - | 4.34 | 19,844 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,641 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,071 |
| Fifty US States in One Minute | 0 | - | 4.56 | 3,517,437 |
| U.S. State Flags | 0 | - | 4.89 | 166,913 |
| U.S. States that Border Canada | 0 | - | 4.91 | 182,322 |
| U.S. States by Church Attendance | 0 | - | 4.59 | 32,231 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 206,579 |
| Category Elimination - U.S. States #1 | 0 | - | 4.87 | 218,341 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 132,398 |
| Great Plains States and Provinces on a Map | 0 | - | 4.95 | 48,522 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 123,824 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 124,607 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 90,997 |
