| The American Civil War | 0 | - | 4.62 | 52,602 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,634 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,721,108 |
| The Vietnam War | 0 | - | 4.44 | 35,632 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 118,602 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 509,459 |
| Axis Occupied Countries of WWII | 0 | - | 4.99 | 229,921 |
| Countries in World War I | 0 | - | 4.88 | 228,963 |
| Hawaiian Islands | 0 | - | 4.83 | 42,897 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,477 |
| U.S. State Flags | 0 | - | 4.89 | 172,426 |
| Battle to Country | 0 | - | 4.91 | 53,861 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 73,062 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 89,595 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 109,261 |
| U.S. Presidents by Event | 0 | - | 4.58 | 35,189 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.62 | 94,526 |
| Presidential Middle Names | 0 | - | 4.41 | 60,659 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,598 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,859 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,600 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,186 |
| Mississippi River States Empty Map Quiz | 0 | - | 4.82 | 56,239 |
| Countries in World War II | 0 | - | 4.53 | 917,732 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 35,174 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,593 |
| The Iraq War | 0 | - | 4.47 | 15,698 |
| United States Map Quiz | 0 | - | 4.98 | 4,168,989 |
| American Monopoly Board - Map Quiz | 0 | - | 4.52 | 21,253 |
| Win the U.S. Presidential Election | 0 | - | 4.78 | 634,377 |
| Six Flags Over Texas | 0 | - | 4.78 | 63,569 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 125,750 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 126,362 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.83 | 62,166 |
| Important Cities in WWII | 0 | - | 4.42 | 93,810 |
| U.S. Five-Star Generals and Admirals | 0 | - | 4.33 | 8,357 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,133 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,854 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 428,143 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,859 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,348 |
| U.S. Presidential Running Mates | 0 | - | 4.41 | 28,745 |
| First Ladies of the United States | 0 | - | 4.28 | 85,905 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,294 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 383,308 |
| U.S. Presidents in Order by First Letter | 0 | - | 4.32 | 77,414 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,336 |
| Harvard University | 0 | - | 4.15 | 8,321 |
| Las Vegas Casinos | 0 | - | 4.13 | 38,130 |
| U.S. Civil War Decoder | 0 | - | 4.14 | 25,333 |
| U.S. States that Border Canada | 0 | - | 4.91 | 186,365 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,927 |
| Midwestern States of the U.S. | 0 | - | 4.88 | 14,089 |
| The Persian Gulf War | 0 | - | 4.02 | 8,477 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,809 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,684 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,940 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,857 |
| Rust Belt Cities Map Quiz | 0 | - | 4.57 | 35,235 |
| Top 10 U.S. States by Republican Party Support | 0 | - | 4.44 | 75,753 |
| Top 10 U.S. States by Democratic Party Support | 0 | - | 4.63 | 81,611 |
| Top 10 U.S. Swing States in the 2024 Election | 0 | - | 4.51 | 75,394 |
| Name a Valid U.S. President #1 | 0 | - | 4.90 | 193,526 |
| American Founding Fathers | 0 | - | 4.42 | 23,268 |
| History of Florida | 0 | - | 4.45 | 9,868 |
| Georgia Counties | 0 | - | 4.52 | 49,913 |
| Cities and Towns of Massachusetts | 0 | - | 4.93 | 74,868 |
| New York Counties | 0 | - | 4.65 | 51,034 |
| Texas Counties | 0 | - | 4.56 | 77,731 |
| History of Texas | 0 | - | 4.43 | 14,680 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 40,207 |
| North Carolina Counties | 0 | - | 4.54 | 53,591 |
| Ohio Counties | 0 | - | 4.48 | 46,080 |
| Pennsylvania Counties | 0 | - | 4.50 | 53,271 |
| Virginia Counties | 0 | - | 4.45 | 33,424 |
| West Virginia Counties | 0 | - | 4.63 | 33,974 |
| American History Quotes #1 | 0 | - | 4.37 | 96,176 |
| American History Quotes #2 | 0 | - | 4.38 | 41,490 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,324 |
| US States Quiz | 0 | - | 5.00 | 16,973,397 |
| States and Provinces that Touch the Great Lakes | 0 | - | 4.57 | 33,697 |
| Major U.S. Rivers with State Names | 0 | - | 4.49 | 39,808 |
| Satellite Images - U.S. States | 0 | - | 4.54 | 45,324 |
| U.S. States by Church Attendance | 0 | - | 4.59 | 32,537 |
| Random General Knowledge - U.S. States | 0 | - | 4.46 | 42,131 |
| Cartoon Versions of U.S. States | 0 | - | 4.75 | 64,114 |
| U.S. States by Nickname | 0 | - | 4.57 | 69,702 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,665 |
| Monarchies of Europe | 0 | - | 4.90 | 98,729 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 70,179 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,173 |
| The Reign of Napoleon | 0 | - | 4.54 | 39,104 |
| Monarchies of Asia | 0 | - | 4.97 | 71,434 |
| Asian Country Superlatives | 0 | - | 4.84 | 81,224 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 92,728 |
| Name the U.S. National Parks | 0 | - | 4.86 | 60,398 |
| Total United States Immigration by Country | 0 | - | 4.91 | 112,241 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 175,374 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 246,019 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 334,875 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 80,109 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,769 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,742 |
| The John Adams Presidency | 0 | - | 4.12 | 8,778 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,771 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,914 |
| California Counties Map Quiz | 0 | - | 4.36 | 34,609 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,641 |
| Word Puzzles - U.S. States | 0 | - | 3.76 | 42,581 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 368,413 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 193,725 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 127,660 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 200,460 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 235,363 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 168,594 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 116,687 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,567 |
| Name the English Monarchs | 0 | - | 4.91 | 505,759 |
| Top 10 Coldest Asian Countries | 0 | - | 4.95 | 123,681 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.87 | 136,841 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.86 | 110,907 |
| Category Elimination - Asian Geography #2 | 0 | - | 4.94 | 97,530 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,387 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 121,193 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 93,100 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.94 | 93,104 |
| Puerto Rico Trivia | 0 | - | 4.52 | 12,057 |
| Top U.S. Universities | 0 | - | 4.15 | 145,690 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,356 |
| 10 U.S. States With The Lowest Murder Rates | 0 | - | 4.48 | 52,855 |
| Pixelated United States Map | 0 | - | 4.88 | 94,723 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 110,379 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 92,327 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 147,060 |
| Biggest Trading Partners - United States | 0 | - | 4.63 | 106,844 |
| Countries that Beat the United States | 0 | - | 4.93 | 168,456 |
| U.S. States by Governor | 0 | - | 4.43 | 18,109 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,753 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,760 |
| 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 | 21,749 |
| Star-Spangled Banner Lyrics | 0 | - | 4.36 | 179,820 |
| History of California | 0 | - | 4.40 | 18,787 |
| California Counties | 0 | - | 4.39 | 120,090 |
| Colorado Counties | 0 | - | 4.45 | 26,896 |
| Florida Counties | 0 | - | 4.40 | 48,987 |
| History of Georgia (U.S. State) | 0 | - | 4.30 | 13,254 |
| State Quiz - Hawaii | 0 | - | 4.35 | 65,574 |
| Illinois Counties | 0 | - | 4.56 | 30,579 |
| History of Illinois | 0 | - | 4.24 | 11,249 |
| Indiana Counties | 0 | - | 4.46 | 29,139 |
| History of Maryland | 0 | - | 4.06 | 6,722 |
| History of Massachusetts | 0 | - | 4.14 | 8,422 |
| Michigan Counties | 0 | - | 4.63 | 30,764 |
| History of Michigan | 0 | - | 4.26 | 6,979 |
| History of New York | 0 | - | 4.36 | 16,407 |
| U.S. States that Border Missouri | 0 | - | 4.55 | 12,858 |
| New Jersey Counties | 0 | - | 4.57 | 30,554 |
| History of New Jersey | 0 | - | 4.38 | 7,302 |
| History of Ohio | 0 | - | 4.14 | 7,373 |
| History of Tennessee | 0 | - | 4.29 | 7,684 |
| Washington Counties | 0 | - | 4.78 | 27,081 |
| History of Washington State | 0 | - | 4.27 | 6,901 |
| Wisconsin Counties | 0 | - | 4.51 | 27,210 |
| Events in U.S. History | 0 | - | 4.41 | 28,793 |
| U.S. History A-Z #1 | 0 | - | 4.36 | 30,465 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,181 |
| Last Names in U.S. History #2 | 0 | - | 4.39 | 17,683 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 118,913 |
| U.S. States Bordering the Great Lakes | 0 | - | 4.55 | 18,298 |
| Top 10 Most Jewish U.S. States | 0 | - | 4.31 | 43,122 |
| U.S. States with the Letter Y | 0 | - | 4.86 | 112,138 |
| 10 Southernmost U.S. States | 0 | - | 4.89 | 114,144 |
| U.S. States with Short Names | 0 | - | 4.91 | 150,198 |
| U.S. States that Start with M | 0 | - | 4.93 | 188,172 |
| U.S. States By Population | 0 | - | 4.92 | 154,046 |
| U.S. States that Start with N | 0 | - | 4.95 | 172,092 |
| U.S. States with Longest Names | 0 | - | 4.85 | 44,810 |
| U.S. States by Coldest Recorded Temperature | 0 | - | 4.52 | 66,690 |
| 10 U.S. States With The Highest Murder Rates | 0 | - | 4.47 | 54,755 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 49,173 |
| US States with an Empty Map | 0 | - | 5.00 | 627,899 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 82,986 |
| States in a Tank of the U.S. Map | 0 | - | 4.47 | 31,422 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,778 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,484 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 66,008 |
| U.S. State Superlatives #1 | 0 | - | 4.47 | 87,652 |
| U.S. State Superlatives #2 | 0 | - | 4.53 | 40,739 |
| TV Shows by U.S. State | 0 | - | 4.33 | 47,531 |
| U.S. States by Alternate Nicknames | 0 | - | 4.24 | 42,977 |
| Colleges by U.S. State - Multiple Choice | 0 | - | 4.57 | 23,116 |
| U.S. National Parks by State - Multiple Choice | 0 | - | 4.46 | 19,334 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 160,564 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 178,122 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 125,601 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,784 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 86,596 |
| Top 10 U.S. States With the Most Tornadoes | 0 | - | 4.53 | 64,956 |
