| The American Civil War | 0 | - | 4.62 | 52,624 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,788 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,726,021 |
| The Vietnam War | 0 | - | 4.44 | 35,655 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 118,719 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 510,163 |
| Axis Occupied Countries of WWII | 0 | - | 4.99 | 230,136 |
| Countries in World War I | 0 | - | 4.88 | 229,153 |
| Hawaiian Islands | 0 | - | 4.83 | 42,949 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,505 |
| U.S. State Flags | 0 | - | 4.89 | 172,965 |
| Battle to Country | 0 | - | 4.91 | 53,961 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 73,098 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 89,733 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 109,561 |
| U.S. Presidents by Event | 0 | - | 4.58 | 35,339 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.62 | 94,629 |
| Presidential Middle Names | 0 | - | 4.41 | 60,724 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,694 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,896 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,633 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,222 |
| Mississippi River States Empty Map Quiz | 0 | - | 4.82 | 56,328 |
| Countries in World War II | 0 | - | 4.53 | 918,902 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 35,204 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,653 |
| The Iraq War | 0 | - | 4.47 | 15,705 |
| United States Map Quiz | 0 | - | 4.98 | 4,171,344 |
| American Monopoly Board - Map Quiz | 0 | - | 4.52 | 21,262 |
| Win the U.S. Presidential Election | 0 | - | 4.78 | 635,804 |
| Six Flags Over Texas | 0 | - | 4.78 | 63,604 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 125,868 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 126,509 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.83 | 62,211 |
| Important Cities in WWII | 0 | - | 4.42 | 93,893 |
| U.S. Five-Star Generals and Admirals | 0 | - | 4.33 | 8,360 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,146 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,862 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 428,514 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,990 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,363 |
| U.S. Presidential Running Mates | 0 | - | 4.41 | 28,774 |
| First Ladies of the United States | 0 | - | 4.28 | 85,952 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,317 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 383,607 |
| U.S. Presidents in Order by First Letter | 0 | - | 4.32 | 77,496 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,362 |
| Harvard University | 0 | - | 4.15 | 8,324 |
| Las Vegas Casinos | 0 | - | 4.13 | 38,148 |
| U.S. Civil War Decoder | 0 | - | 4.14 | 25,337 |
| U.S. States that Border Canada | 0 | - | 4.91 | 186,687 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,945 |
| Midwestern States of the U.S. | 0 | - | 4.88 | 14,161 |
| The Persian Gulf War | 0 | - | 4.02 | 8,486 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,891 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,824 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,981 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,947 |
| Rust Belt Cities Map Quiz | 0 | - | 4.57 | 35,275 |
| Top 10 U.S. States by Republican Party Support | 0 | - | 4.44 | 75,812 |
| Top 10 U.S. States by Democratic Party Support | 0 | - | 4.63 | 81,682 |
| Top 10 U.S. Swing States in the 2024 Election | 0 | - | 4.51 | 75,432 |
| Name a Valid U.S. President #1 | 0 | - | 4.90 | 193,807 |
| American Founding Fathers | 0 | - | 4.42 | 23,273 |
| History of Florida | 0 | - | 4.45 | 9,874 |
| Georgia Counties | 0 | - | 4.52 | 50,010 |
| Cities and Towns of Massachusetts | 0 | - | 4.93 | 75,006 |
| New York Counties | 0 | - | 4.65 | 51,104 |
| Texas Counties | 0 | - | 4.56 | 77,893 |
| History of Texas | 0 | - | 4.43 | 14,687 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 40,266 |
| North Carolina Counties | 0 | - | 4.54 | 53,660 |
| Ohio Counties | 0 | - | 4.48 | 46,181 |
| Pennsylvania Counties | 0 | - | 4.50 | 53,351 |
| Virginia Counties | 0 | - | 4.45 | 33,447 |
| West Virginia Counties | 0 | - | 4.63 | 33,998 |
| American History Quotes #1 | 0 | - | 4.37 | 96,198 |
| American History Quotes #2 | 0 | - | 4.38 | 41,510 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,339 |
| US States Quiz | 0 | - | 5.00 | 16,996,627 |
| States and Provinces that Touch the Great Lakes | 0 | - | 4.58 | 35,227 |
| Major U.S. Rivers with State Names | 0 | - | 4.49 | 39,862 |
| Satellite Images - U.S. States | 0 | - | 4.54 | 45,369 |
| U.S. States by Church Attendance | 0 | - | 4.59 | 32,554 |
| Random General Knowledge - U.S. States | 0 | - | 4.46 | 42,166 |
| Cartoon Versions of U.S. States | 0 | - | 4.75 | 64,142 |
| U.S. States by Nickname | 0 | - | 4.57 | 69,741 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,766 |
| Monarchies of Europe | 0 | - | 4.90 | 98,877 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 70,438 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,377 |
| The Reign of Napoleon | 0 | - | 4.54 | 39,143 |
| Monarchies of Asia | 0 | - | 4.97 | 71,505 |
| Asian Country Superlatives | 0 | - | 4.84 | 81,291 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 92,839 |
| Name the U.S. National Parks | 0 | - | 4.86 | 60,485 |
| Total United States Immigration by Country | 0 | - | 4.91 | 112,411 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 175,553 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 246,482 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 335,406 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 80,145 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,779 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,755 |
| The John Adams Presidency | 0 | - | 4.12 | 8,788 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,776 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,926 |
| California Counties Map Quiz | 0 | - | 4.36 | 34,618 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,722 |
| Word Puzzles - U.S. States | 0 | - | 3.76 | 42,598 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 368,666 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 193,884 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 127,793 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 200,711 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 235,867 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 168,924 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 116,895 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,770 |
| Name the English Monarchs | 0 | - | 4.91 | 506,380 |
| Top 10 Coldest Asian Countries | 0 | - | 4.95 | 123,744 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.87 | 137,302 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.86 | 111,371 |
| Category Elimination - Asian Geography #2 | 0 | - | 4.94 | 97,722 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,536 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 121,338 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 93,429 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.94 | 95,160 |
| Puerto Rico Trivia | 0 | - | 4.52 | 12,069 |
| Top U.S. Universities | 0 | - | 4.15 | 145,826 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,398 |
| 10 U.S. States With The Lowest Murder Rates | 0 | - | 4.48 | 53,000 |
| Pixelated United States Map | 0 | - | 4.88 | 94,818 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 110,548 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 92,448 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 147,224 |
| Biggest Trading Partners - United States | 0 | - | 4.63 | 106,879 |
| Countries that Beat the United States | 0 | - | 4.93 | 168,669 |
| U.S. States by Governor | 0 | - | 4.43 | 18,112 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,765 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,777 |
| The George Washington Presidency | 0 | - | 4.03 | 14,609 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,989 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,761 |
| Star-Spangled Banner Lyrics | 0 | - | 4.36 | 179,896 |
| History of California | 0 | - | 4.40 | 18,796 |
| California Counties | 0 | - | 4.39 | 120,331 |
| Colorado Counties | 0 | - | 4.45 | 26,932 |
| Florida Counties | 0 | - | 4.40 | 49,075 |
| History of Georgia (U.S. State) | 0 | - | 4.30 | 13,262 |
| State Quiz - Hawaii | 0 | - | 4.35 | 65,641 |
| Illinois Counties | 0 | - | 4.56 | 30,649 |
| History of Illinois | 0 | - | 4.24 | 11,255 |
| Indiana Counties | 0 | - | 4.46 | 29,182 |
| History of Maryland | 0 | - | 4.06 | 6,729 |
| History of Massachusetts | 0 | - | 4.14 | 8,430 |
| Michigan Counties | 0 | - | 4.63 | 30,837 |
| History of Michigan | 0 | - | 4.26 | 6,986 |
| History of New York | 0 | - | 4.36 | 16,418 |
| U.S. States that Border Missouri | 0 | - | 4.55 | 12,862 |
| New Jersey Counties | 0 | - | 4.57 | 30,610 |
| History of New Jersey | 0 | - | 4.38 | 7,309 |
| History of Ohio | 0 | - | 4.14 | 7,382 |
| History of Tennessee | 0 | - | 4.29 | 7,687 |
| Washington Counties | 0 | - | 4.78 | 27,147 |
| History of Washington State | 0 | - | 4.27 | 6,907 |
| Wisconsin Counties | 0 | - | 4.51 | 27,292 |
| Events in U.S. History | 0 | - | 4.41 | 28,825 |
| U.S. History A-Z #1 | 0 | - | 4.36 | 30,523 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,196 |
| Last Names in U.S. History #2 | 0 | - | 4.39 | 17,698 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 119,083 |
| U.S. States Bordering the Great Lakes | 0 | - | 4.55 | 18,313 |
| Top 10 Most Jewish U.S. States | 0 | - | 4.31 | 43,155 |
| U.S. States with the Letter Y | 0 | - | 4.86 | 112,279 |
| 10 Southernmost U.S. States | 0 | - | 4.89 | 114,316 |
| U.S. States with Short Names | 0 | - | 4.91 | 150,354 |
| U.S. States that Start with M | 0 | - | 4.93 | 188,373 |
| U.S. States By Population | 0 | - | 4.92 | 154,148 |
| U.S. States that Start with N | 0 | - | 4.95 | 172,234 |
| U.S. States with Longest Names | 0 | - | 4.85 | 44,899 |
| U.S. States by Coldest Recorded Temperature | 0 | - | 4.52 | 66,731 |
| 10 U.S. States With The Highest Murder Rates | 0 | - | 4.47 | 54,826 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 49,291 |
| US States with an Empty Map | 0 | - | 5.00 | 628,711 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 83,081 |
| States in a Tank of the U.S. Map | 0 | - | 4.47 | 31,454 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,866 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,542 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 66,098 |
| U.S. State Superlatives #1 | 0 | - | 4.47 | 87,687 |
| U.S. State Superlatives #2 | 0 | - | 4.53 | 40,765 |
| TV Shows by U.S. State | 0 | - | 4.33 | 47,553 |
| U.S. States by Alternate Nicknames | 0 | - | 4.24 | 42,991 |
| Colleges by U.S. State - Multiple Choice | 0 | - | 4.57 | 23,134 |
| U.S. National Parks by State - Multiple Choice | 0 | - | 4.46 | 19,349 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 161,053 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 178,229 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 125,680 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,822 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 86,651 |
| Top 10 U.S. States With the Most Tornadoes | 0 | - | 4.53 | 65,005 |
