| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 129,557 |
| Vietnam War Countries | 0 | - | 4.82 | 94,529 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,720,338 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 428,096 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 162,141 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 193,470 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,776 |
| Countries of Europe After World War II | 0 | - | 4.99 | 189,162 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 157,242 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,583 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,798 |
| Random U.S. States on a Map | 0 | - | 4.96 | 629,448 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 104,499 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 109,245 |
| U.S. Presidents by Event | 0 | - | 4.58 | 35,163 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.62 | 94,499 |
| Presidential Middle Names | 0 | - | 4.41 | 60,646 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 24,043 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,584 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,844 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 35,167 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,593 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,370 |
| Win the 1828 U.S. Presidential Election | 0 | - | 4.30 | 54,419 |
| American Founding Fathers | 0 | - | 4.42 | 23,266 |
| American Revolution Decoder | 0 | - | 4.12 | 20,985 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,610 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 145,408 |
| The Iraq War | 0 | - | 4.47 | 15,696 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 306,004 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 70,485 |
| United States Map Quiz | 0 | - | 4.98 | 4,168,589 |
| Arms Exports - United States | 0 | - | 4.77 | 62,655 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,834 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,345 |
| U.S. Presidential Running Mates | 0 | - | 4.41 | 28,739 |
| First Ladies of the United States | 0 | - | 4.28 | 85,898 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,293 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 383,269 |
| U.S. Presidents in Order by First Letter | 0 | - | 4.32 | 77,407 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,333 |
| Add a Letter - Make a U.S. President | 0 | - | 4.58 | 24,075 |
| The John F. Kennedy Presidency | 0 | - | 4.47 | 43,897 |
| U.S. Civil War Decoder | 0 | - | 4.14 | 25,330 |
| Category Elimination - U.S. States #1 | 0 | - | 4.88 | 222,141 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 135,356 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 89,568 |
| The Persian Gulf War | 0 | - | 4.02 | 8,476 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,925 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,935 |
| Presidents that Beat Thomas Jefferson | 0 | - | 4.49 | 25,065 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,259 |
| U.S. President Scramble | 0 | - | 4.40 | 117,372 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,309 |
| U.S. Presidents by Picture - Multiple Choice | 0 | - | 4.50 | 28,994 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 48,058 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 70,150 |
| Countries of the Soviet Union | 0 | - | 4.98 | 195,426 |
| Soviet Union Country Quiz | 0 | - | 4.91 | 81,062 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,798 |
| Name the U.S. National Parks | 0 | - | 4.86 | 60,370 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,654 |
| Total United States Immigration by Country | 0 | - | 4.91 | 112,214 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,838 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 175,345 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 245,955 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 73,055 |
| U.S. Senators by State | 0 | - | 4.44 | 40,077 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 20,139 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,769 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,736 |
| The John Adams Presidency | 0 | - | 4.12 | 8,778 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,767 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,910 |
| The Kennedy Family | 0 | - | 3.90 | 14,092 |
| Cities and Towns of Massachusetts | 0 | - | 4.93 | 74,846 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,625 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 40,196 |
| US States Quiz | 0 | - | 5.00 | 16,969,773 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 368,364 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,147 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 84,889 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,564 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,684 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,437 |
| Countries of the German Empire | 0 | - | 4.51 | 38,123 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 116,659 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,533 |
| Asian Countries with the Most Christians | 0 | - | 4.86 | 97,809 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,375 |
| African Countries with the Most Christians | 0 | - | 4.94 | 75,991 |
| Biggest Trading Partners – Australia | 0 | - | 4.93 | 61,917 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,350 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 334,776 |
| Pixelated United States Map | 0 | - | 4.88 | 94,700 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 110,351 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 92,295 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 147,039 |
| Countries that Beat the United States | 0 | - | 4.93 | 168,413 |
| Win the U.S. Presidential Election | 0 | - | 4.78 | 634,149 |
| Presidential Actors | 0 | - | 4.36 | 19,234 |
| The George Washington Presidency | 0 | - | 4.03 | 14,595 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,976 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,747 |
| The Barack Obama Presidency | 0 | - | 4.13 | 25,484 |
| California A-Z | 0 | - | 4.49 | 28,830 |
| Six Flags Over Texas | 0 | - | 4.78 | 63,563 |
| U.S. History for Dummies | 0 | - | 4.47 | 83,343 |
| The Most Recent... United States | 0 | - | 4.46 | 18,546 |
| The American Civil War | 0 | - | 4.62 | 52,598 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 118,883 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 509,345 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 112,108 |
| 10 Southernmost U.S. States | 0 | - | 4.89 | 114,113 |
| U.S. States with Short Names | 0 | - | 4.91 | 150,054 |
| U.S. States that Start with M | 0 | - | 4.93 | 188,130 |
| U.S. States By Population | 0 | - | 4.92 | 154,020 |
| U.S. States that Start with N | 0 | - | 4.95 | 172,065 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,791 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 49,157 |
| US States with an Empty Map | 0 | - | 5.00 | 627,753 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 82,973 |
| States in a Tank of the U.S. Map | 0 | - | 4.47 | 31,415 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,766 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,477 |
| Draw All US State Borders | 0 | - | 4.99 | 140,140 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 65,996 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 160,542 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 178,112 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 125,589 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,775 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 86,589 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 102,331 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,951 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.85 | 67,920 |
| Draw All US State Borders - Extreme | 0 | - | 4.99 | 79,107 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 96,853 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 133,975 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 166,312 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 104,498 |
| All Modern-Day Countries Ever Controlled by Greeks | 0 | - | 4.98 | 54,557 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 61,548 |
| Countries of Iberia in History with a Map | 0 | - | 4.88 | 42,292 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,761 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,974 |
| Commonwealth of Nations Countries | 0 | - | 4.95 | 238,095 |
| Prime Ministers of the UK | 0 | - | 4.95 | 441,646 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 70,409 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,981 |
| Countries Bordering China Since 1914 | 0 | - | 4.92 | 95,765 |
| All Modern-Day Countries Ever Controlled by Chinese People | 0 | - | 4.82 | 55,112 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 89,825 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 81,611 |
| Rivers of the United States | 0 | - | 4.93 | 66,577 |
| Names of Generations | 0 | - | 4.09 | 45,428 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 118,581 |
| Top 10 U.S. States by Republican Party Support | 0 | - | 4.44 | 75,748 |
| Top 10 U.S. States by Democratic Party Support | 0 | - | 4.63 | 81,602 |
| Top 10 U.S. Swing States in the 2024 Election | 0 | - | 4.51 | 75,386 |
| Movies with America in the Title | 0 | - | 4.17 | 28,787 |
| Countries Closest to Alaska | 0 | - | 4.93 | 124,968 |
| Top 10 Los Angeles Lakers of All-Time | 0 | - | 4.24 | 47,141 |
| History of Florida | 0 | - | 4.45 | 9,866 |
| Hawaiian Islands | 0 | - | 4.83 | 42,883 |
| Countries Closest to Maine | 0 | - | 4.85 | 67,497 |
| Harvard University | 0 | - | 4.15 | 8,319 |
| History of Texas | 0 | - | 4.43 | 14,679 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,473 |
| American History Quotes #1 | 0 | - | 4.37 | 96,172 |
| People on Money - United States | 0 | - | 4.31 | 63,416 |
| American History Quotes #2 | 0 | - | 4.38 | 41,487 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,569 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,182 |
| Events in U.S. History | 0 | - | 4.41 | 28,789 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,180 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,767 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,320 |
| U.S. State Flags | 0 | - | 4.89 | 172,333 |
| U.S. States that Border Canada | 0 | - | 4.91 | 186,321 |
| U.S. States by Church Attendance | 0 | - | 4.59 | 32,535 |
| U.S. States with the Most Billionaires | 0 | - | 4.51 | 50,542 |
| Top U.S. States in Crude Oil Production | 0 | - | 4.51 | 41,125 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 210,272 |
| Great Plains States and Provinces on a Map | 0 | - | 4.95 | 49,993 |
| Least Visited U.S. States by JetPunkers | 0 | - | 4.44 | 70,889 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 125,735 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 126,349 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 92,694 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.83 | 62,160 |
| U.S. States that Start with M - Shape Quiz | 0 | - | 4.94 | 58,374 |
| All Modern-Day Countries Ever Controlled by French People | 0 | - | 4.99 | 58,414 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 71,898 |
| Biggest Roman Empire Countries | 0 | - | 4.87 | 102,215 |
| Biggest Trading Partners - Spain | 0 | - | 4.92 | 53,941 |
| Biggest Trading Partners – United Kingdom | 0 | - | 4.93 | 80,829 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 83,272 |
| Biggest Trading Partners - China | 0 | - | 4.95 | 75,445 |
| George Washington... or George W. Bush? | 0 | - | 4.16 | 12,293 |
| Biggest Axis-Controlled Cities | 0 | - | 4.44 | 49,001 |
| Flags of WW1 | 0 | - | 4.60 | 38,624 |
