| The American Civil War | 0 | - | 4.62 | 52,536 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,385 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,713,258 |
| The Vietnam War | 0 | - | 4.44 | 35,600 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 118,437 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 508,403 |
| Axis Occupied Countries of WWII | 0 | - | 4.99 | 229,568 |
| Countries in World War I | 0 | - | 4.88 | 228,630 |
| Hawaiian Islands | 0 | - | 4.83 | 42,811 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,418 |
| U.S. State Flags | 0 | - | 4.89 | 171,697 |
| Battle to Country | 0 | - | 4.91 | 53,646 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,987 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 89,339 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 109,040 |
| U.S. Presidents by Event | 0 | - | 4.58 | 34,880 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.62 | 94,255 |
| Presidential Middle Names | 0 | - | 4.41 | 60,510 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,512 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,736 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,536 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,151 |
| Mississippi River States Empty Map Quiz | 0 | - | 4.82 | 56,116 |
| Countries in World War II | 0 | - | 4.54 | 915,853 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 35,094 |
| The Iraq War | 0 | - | 4.47 | 15,681 |
| United States Map Quiz | 0 | - | 4.98 | 4,165,384 |
| American Monopoly Board - Map Quiz | 0 | - | 4.52 | 21,233 |
| Win the U.S. Presidential Election | 0 | - | 4.78 | 631,390 |
| Six Flags Over Texas | 0 | - | 4.78 | 63,496 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 125,433 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 126,083 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 62,063 |
| Important Cities in WWII | 0 | - | 4.42 | 93,676 |
| U.S. Five-Star Generals and Admirals | 0 | - | 4.33 | 8,344 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,121 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,839 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 427,491 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,633 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,305 |
| First Ladies of the United States | 0 | - | 4.28 | 85,796 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,260 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 382,730 |
| U.S. Presidents in Order by First Letter | 0 | - | 4.32 | 77,324 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,274 |
| Harvard University | 0 | - | 4.15 | 8,314 |
| Las Vegas Casinos | 0 | - | 4.13 | 38,103 |
| U.S. Civil War Decoder | 0 | - | 4.14 | 25,310 |
| U.S. States that Border Canada | 0 | - | 4.91 | 185,853 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,885 |
| Midwestern States of the U.S. | 0 | - | 4.88 | 13,984 |
| The Persian Gulf War | 0 | - | 4.02 | 8,468 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,680 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,378 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,845 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,699 |
| Rust Belt Cities Map Quiz | 0 | - | 4.57 | 35,194 |
| Top 10 U.S. States by Republican Party Support | 0 | - | 4.44 | 75,666 |
| Top 10 U.S. States by Democratic Party Support | 0 | - | 4.63 | 81,507 |
| Top 10 U.S. Swing States in the 2024 Election | 0 | - | 4.51 | 75,329 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 192,970 |
| American Founding Fathers | 0 | - | 4.42 | 23,250 |
| History of Florida | 0 | - | 4.45 | 9,851 |
| Georgia Counties | 0 | - | 4.51 | 49,759 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 74,570 |
| New York Counties | 0 | - | 4.65 | 50,894 |
| Texas Counties | 0 | - | 4.56 | 77,337 |
| History of Texas | 0 | - | 4.43 | 14,664 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 40,098 |
| North Carolina Counties | 0 | - | 4.54 | 53,488 |
| Ohio Counties | 0 | - | 4.48 | 45,985 |
| Pennsylvania Counties | 0 | - | 4.50 | 53,106 |
| Virginia Counties | 0 | - | 4.45 | 33,369 |
| West Virginia Counties | 0 | - | 4.63 | 33,897 |
| American History Quotes #1 | 0 | - | 4.37 | 96,127 |
| American History Quotes #2 | 0 | - | 4.38 | 41,465 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,295 |
| US States Quiz | 0 | - | 5.00 | 16,938,601 |
| Major U.S. Rivers with State Names | 0 | - | 4.49 | 39,672 |
| Satellite Images - U.S. States | 0 | - | 4.54 | 45,261 |
| U.S. States by Church Attendance | 0 | - | 4.59 | 32,501 |
| Random General Knowledge - U.S. States | 0 | - | 4.46 | 42,086 |
| Cartoon Versions of U.S. States | 0 | - | 4.75 | 64,044 |
| U.S. States by Nickname | 0 | - | 4.57 | 69,624 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,497 |
| Monarchies of Europe | 0 | - | 4.90 | 98,476 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 69,847 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,897 |
| The Reign of Napoleon | 0 | - | 4.54 | 39,054 |
| Monarchies of Asia | 0 | - | 4.97 | 71,309 |
| Asian Country Superlatives | 0 | - | 4.84 | 81,098 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 92,504 |
| Name the U.S. National Parks | 0 | - | 4.86 | 60,208 |
| Total United States Immigration by Country | 0 | - | 4.91 | 111,995 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 175,064 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 245,283 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 333,797 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 80,066 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 28,691 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,756 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,696 |
| The John Adams Presidency | 0 | - | 4.12 | 8,766 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,752 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,878 |
| California Counties Map Quiz | 0 | - | 4.36 | 34,544 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,494 |
| Word Puzzles - U.S. States | 0 | - | 3.76 | 42,562 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 368,003 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 193,471 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 127,400 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 200,025 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 234,628 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 168,051 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 116,414 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,203 |
| Name the English Monarchs | 0 | - | 4.91 | 504,642 |
| Top 10 Coldest Asian Countries | 0 | - | 4.95 | 123,557 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.87 | 136,050 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.86 | 110,531 |
| Category Elimination - Asian Geography #2 | 0 | - | 4.94 | 97,266 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,189 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 120,923 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 92,763 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.93 | 84,675 |
| Puerto Rico Trivia | 0 | - | 4.51 | 12,038 |
| Top U.S. Universities | 0 | - | 4.15 | 145,486 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,281 |
| 10 U.S. States With The Lowest Murder Rates | 0 | - | 4.48 | 52,397 |
| Pixelated United States Map | 0 | - | 4.88 | 94,542 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 110,081 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 92,100 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 146,829 |
| Biggest Trading Partners - United States | 0 | - | 4.63 | 106,763 |
| Countries that Beat the United States | 0 | - | 4.93 | 168,012 |
| U.S. States by Governor | 0 | - | 4.43 | 18,086 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,724 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,723 |
| The George Washington Presidency | 0 | - | 4.03 | 14,575 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,955 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,724 |
| Star-Spangled Banner Lyrics | 0 | - | 4.36 | 179,634 |
| History of California | 0 | - | 4.40 | 18,771 |
| California Counties | 0 | - | 4.39 | 119,845 |
| Colorado Counties | 0 | - | 4.45 | 26,825 |
| Florida Counties | 0 | - | 4.39 | 48,800 |
| History of Georgia (U.S. State) | 0 | - | 4.30 | 13,245 |
| State Quiz - Hawaii | 0 | - | 4.35 | 65,475 |
| Illinois Counties | 0 | - | 4.56 | 30,514 |
| History of Illinois | 0 | - | 4.24 | 11,241 |
| Indiana Counties | 0 | - | 4.46 | 29,087 |
| History of Maryland | 0 | - | 4.06 | 6,707 |
| History of Massachusetts | 0 | - | 4.14 | 8,409 |
| Michigan Counties | 0 | - | 4.63 | 30,523 |
| History of Michigan | 0 | - | 4.26 | 6,964 |
| History of New York | 0 | - | 4.36 | 16,386 |
| U.S. States that Border Missouri | 0 | - | 4.55 | 12,846 |
| New Jersey Counties | 0 | - | 4.57 | 30,454 |
| History of New Jersey | 0 | - | 4.38 | 7,289 |
| History of Ohio | 0 | - | 4.14 | 7,364 |
| History of Tennessee | 0 | - | 4.29 | 7,676 |
| Washington Counties | 0 | - | 4.78 | 27,018 |
| History of Washington State | 0 | - | 4.27 | 6,891 |
| Wisconsin Counties | 0 | - | 4.51 | 27,074 |
| Events in U.S. History | 0 | - | 4.41 | 28,741 |
| U.S. History A-Z #1 | 0 | - | 4.36 | 30,231 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,149 |
| Last Names in U.S. History #2 | 0 | - | 4.39 | 17,655 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 118,610 |
| U.S. States Bordering the Great Lakes | 0 | - | 4.55 | 18,281 |
| Top 10 Most Jewish U.S. States | 0 | - | 4.31 | 43,052 |
| States and Provinces that Touch the Great Lakes | 0 | - | 4.55 | 28,920 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 111,829 |
| 10 Southernmost U.S. States | 0 | - | 4.89 | 113,830 |
| U.S. States with Short Names | 0 | - | 4.91 | 149,463 |
| U.S. States that Start with M | 0 | - | 4.93 | 187,804 |
| U.S. States By Population | 0 | - | 4.92 | 153,832 |
| U.S. States that Start with N | 0 | - | 4.95 | 171,839 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,659 |
| U.S. States by Coldest Recorded Temperature | 0 | - | 4.52 | 66,623 |
| 10 U.S. States With The Highest Murder Rates | 0 | - | 4.47 | 54,617 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 48,957 |
| US States with an Empty Map | 0 | - | 5.00 | 626,657 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 82,844 |
| States in a Tank of the U.S. Map | 0 | - | 4.47 | 31,366 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,605 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,379 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 65,867 |
| U.S. State Superlatives #1 | 0 | - | 4.47 | 87,608 |
| U.S. State Superlatives #2 | 0 | - | 4.53 | 40,694 |
| TV Shows by U.S. State | 0 | - | 4.33 | 47,505 |
| U.S. States by Alternate Nicknames | 0 | - | 4.24 | 42,959 |
| Colleges by U.S. State - Multiple Choice | 0 | - | 4.57 | 23,087 |
| U.S. National Parks by State - Multiple Choice | 0 | - | 4.46 | 19,311 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 160,375 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 177,996 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 125,473 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,710 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 86,492 |
| Top 10 U.S. States With the Most Tornadoes | 0 | - | 4.53 | 64,888 |
| Top 10 Least Religious U.S. States | 0 | - | 4.51 | 34,376 |
