| The American Civil War | 0 | - | 4.62 | 52,384 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,594 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,690,869 |
| The Vietnam War | 0 | - | 4.44 | 35,492 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 118,035 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 505,778 |
| Axis Occupied Countries of WWII | 0 | - | 4.99 | 228,787 |
| Countries in World War I | 0 | - | 4.88 | 227,908 |
| Hawaiian Islands | 0 | - | 4.83 | 42,665 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,284 |
| U.S. State Flags | 0 | - | 4.89 | 169,943 |
| Battle to Country | 0 | - | 4.91 | 53,202 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,824 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 88,798 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 108,580 |
| U.S. Presidents by Event | 0 | - | 4.58 | 34,311 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 93,650 |
| Presidential Middle Names | 0 | - | 4.41 | 60,146 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,222 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,491 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,375 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,008 |
| Mississippi River States Empty Map Quiz | 0 | - | 4.81 | 55,895 |
| Countries in World War II | 0 | - | 4.54 | 911,360 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,954 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,271 |
| The Iraq War | 0 | - | 4.47 | 15,641 |
| United States Map Quiz | 0 | - | 4.98 | 4,154,942 |
| American Monopoly Board - Map Quiz | 0 | - | 4.52 | 21,201 |
| Win the U.S. Presidential Election | 0 | - | 4.78 | 625,974 |
| Six Flags Over Texas | 0 | - | 4.78 | 63,299 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 124,536 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 125,467 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,846 |
| Important Cities in WWII | 0 | - | 4.42 | 93,387 |
| U.S. Five-Star Generals and Admirals | 0 | - | 4.33 | 8,328 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,067 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,768 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 426,083 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,110 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,245 |
| First Ladies of the United States | 0 | - | 4.28 | 85,559 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,209 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 381,214 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 76,981 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,172 |
| Harvard University | 0 | - | 4.15 | 8,292 |
| Las Vegas Casinos | 0 | - | 4.12 | 38,047 |
| U.S. Civil War Decoder | 0 | - | 4.14 | 25,256 |
| U.S. States that Border Canada | 0 | - | 4.91 | 184,504 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,805 |
| Midwestern States of the U.S. | 0 | - | 4.88 | 13,678 |
| The Persian Gulf War | 0 | - | 4.02 | 8,445 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,387 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,249 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,673 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,370 |
| Rust Belt Cities Map Quiz | 0 | - | 4.57 | 35,050 |
| Top 10 U.S. States by Republican Party Support | 0 | - | 4.44 | 75,454 |
| Top 10 U.S. States by Democratic Party Support | 0 | - | 4.63 | 81,249 |
| Top 10 U.S. Swing States in the 2024 Election | 0 | - | 4.51 | 75,152 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 191,467 |
| American Founding Fathers | 0 | - | 4.42 | 23,206 |
| History of Florida | 0 | - | 4.45 | 9,815 |
| Georgia Counties | 0 | - | 4.50 | 49,429 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 73,805 |
| New York Counties | 0 | - | 4.65 | 50,483 |
| Texas Counties | 0 | - | 4.55 | 76,655 |
| History of Texas | 0 | - | 4.43 | 14,610 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 39,846 |
| North Carolina Counties | 0 | - | 4.54 | 53,157 |
| Ohio Counties | 0 | - | 4.47 | 45,780 |
| Pennsylvania Counties | 0 | - | 4.49 | 52,661 |
| Virginia Counties | 0 | - | 4.45 | 33,215 |
| West Virginia Counties | 0 | - | 4.63 | 33,738 |
| American History Quotes #1 | 0 | - | 4.37 | 95,976 |
| American History Quotes #2 | 0 | - | 4.38 | 41,381 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,219 |
| US States Quiz | 0 | - | 5.00 | 16,843,418 |
| Major U.S. Rivers with State Names | 0 | - | 4.49 | 39,536 |
| Satellite Images - U.S. States | 0 | - | 4.53 | 45,116 |
| U.S. States by Church Attendance | 0 | - | 4.59 | 32,394 |
| Random General Knowledge - U.S. States | 0 | - | 4.46 | 41,941 |
| Cartoon Versions of U.S. States | 0 | - | 4.77 | 63,834 |
| U.S. States by Nickname | 0 | - | 4.57 | 69,498 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,978 |
| Monarchies of Europe | 0 | - | 4.90 | 98,004 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 68,889 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,979 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,920 |
| Monarchies of Asia | 0 | - | 4.97 | 71,010 |
| Asian Country Superlatives | 0 | - | 4.84 | 80,795 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,676 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 120,450 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 92,174 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 92,017 |
| Name the U.S. National Parks | 0 | - | 4.86 | 59,834 |
| Total United States Immigration by Country | 0 | - | 4.91 | 111,375 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 174,268 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 243,419 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 331,324 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,938 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 28,609 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,717 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,627 |
| The John Adams Presidency | 0 | - | 4.12 | 8,738 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,730 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,839 |
| California Counties Map Quiz | 0 | - | 4.36 | 34,445 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,135 |
| Word Puzzles - U.S. States | 0 | - | 3.76 | 42,510 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 366,707 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,994 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 126,854 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 199,137 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 232,800 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 166,826 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 115,807 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,332 |
| Name the English Monarchs | 0 | - | 4.91 | 501,825 |
| Top 10 Coldest Asian Countries | 0 | - | 4.95 | 122,894 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.88 | 133,142 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.85 | 109,810 |
| Category Elimination - Asian Geography #2 | 0 | - | 4.94 | 96,636 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 81,176 |
| Hindu Countries | 0 | - | 4.86 | 50,048 |
| Top 10 Richest Countries in Africa | 0 | - | 4.85 | 76,174 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.93 | 83,643 |
| Puerto Rico Trivia | 0 | - | 4.51 | 11,991 |
| Top U.S. Universities | 0 | - | 4.15 | 144,918 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,124 |
| 10 U.S. States With The Lowest Murder Rates | 0 | - | 4.51 | 42,041 |
| Pixelated United States Map | 0 | - | 4.87 | 94,119 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 109,426 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 91,572 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 146,198 |
| Biggest Trading Partners - United States | 0 | - | 4.63 | 106,613 |
| Countries that Beat the United States | 0 | - | 4.93 | 166,641 |
| U.S. States by Governor | 0 | - | 4.43 | 18,046 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,677 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,656 |
| The George Washington Presidency | 0 | - | 4.03 | 14,539 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,922 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,662 |
| Star-Spangled Banner Lyrics | 0 | - | 4.36 | 179,236 |
| History of California | 0 | - | 4.40 | 18,745 |
| California Counties | 0 | - | 4.39 | 118,993 |
| Colorado Counties | 0 | - | 4.45 | 26,626 |
| Florida Counties | 0 | - | 4.39 | 48,492 |
| History of Georgia (U.S. State) | 0 | - | 4.30 | 13,214 |
| State Quiz - Hawaii | 0 | - | 4.35 | 65,265 |
| Illinois Counties | 0 | - | 4.56 | 30,359 |
| History of Illinois | 0 | - | 4.24 | 11,215 |
| Indiana Counties | 0 | - | 4.46 | 28,895 |
| History of Maryland | 0 | - | 4.06 | 6,685 |
| History of Massachusetts | 0 | - | 4.14 | 8,383 |
| Michigan Counties | 0 | - | 4.63 | 30,299 |
| History of Michigan | 0 | - | 4.26 | 6,938 |
| History of New York | 0 | - | 4.36 | 16,340 |
| U.S. States that Border Missouri | 0 | - | 4.55 | 12,796 |
| New Jersey Counties | 0 | - | 4.57 | 30,248 |
| History of New Jersey | 0 | - | 4.38 | 7,251 |
| History of Ohio | 0 | - | 4.14 | 7,337 |
| History of Tennessee | 0 | - | 4.29 | 7,656 |
| Washington Counties | 0 | - | 4.78 | 26,811 |
| History of Washington State | 0 | - | 4.27 | 6,872 |
| Wisconsin Counties | 0 | - | 4.51 | 26,888 |
| U.S. History A-Z #1 | 0 | - | 4.36 | 29,978 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,096 |
| Last Names in U.S. History #2 | 0 | - | 4.39 | 17,594 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 117,688 |
| U.S. States Bordering the Great Lakes | 0 | - | 4.54 | 18,241 |
| Top 10 Most Jewish U.S. States | 0 | - | 4.31 | 42,929 |
| States and Provinces that Touch the Great Lakes | 0 | - | 4.54 | 28,887 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 111,225 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 113,248 |
| U.S. States with Short Names | 0 | - | 4.91 | 148,770 |
| U.S. States that Start with M | 0 | - | 4.93 | 187,048 |
| U.S. States By Population | 0 | - | 4.92 | 153,189 |
| U.S. States that Start with N | 0 | - | 4.95 | 171,260 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,354 |
| U.S. States by Coldest Recorded Temperature | 0 | - | 4.52 | 66,450 |
| 10 U.S. States With The Highest Murder Rates | 0 | - | 4.47 | 53,991 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 48,445 |
| US States with an Empty Map | 0 | - | 5.00 | 623,621 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 82,419 |
| States in a Tank of the U.S. Map | 0 | - | 4.47 | 31,204 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,177 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,132 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 65,503 |
| U.S. State Superlatives #1 | 0 | - | 4.47 | 87,487 |
| U.S. State Superlatives #2 | 0 | - | 4.53 | 40,607 |
| TV Shows by U.S. State | 0 | - | 4.33 | 47,421 |
| U.S. States by Alternate Nicknames | 0 | - | 4.24 | 42,898 |
| Colleges by U.S. State - Multiple Choice | 0 | - | 4.57 | 23,012 |
| U.S. National Parks by State - Multiple Choice | 0 | - | 4.46 | 19,254 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 159,828 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 177,611 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 125,092 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,442 |
