| The American Revolution | 0 | - | 4.52 | 54,209 |
| Confederate States of the U.S. Civil War | 0 | - | 4.90 | 129,121 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,687,445 |
| Vietnam War Countries | 0 | - | 4.83 | 94,059 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 425,802 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 381,054 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 161,232 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,140 |
| Countries of Europe After World War II | 0 | - | 4.99 | 188,027 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 156,226 |
| American Revolution Decoder | 0 | - | 4.10 | 20,935 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,500 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 191,301 |
| Random U.S. States on a Map | 0 | - | 4.96 | 624,970 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,530 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 104,159 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 108,513 |
| U.S. Presidents by Event | 0 | - | 4.58 | 34,232 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 93,571 |
| Presidential Middle Names | 0 | - | 4.41 | 60,097 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,173 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,425 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,349 |
| Most-Visited Countries by U.S. Presidents | 0 | - | 4.96 | 193,354 |
| American Founding Fathers | 0 | - | 4.42 | 23,200 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,484 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 144,260 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 304,593 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,933 |
| The John F. Kennedy Presidency | 0 | - | 4.47 | 43,666 |
| Random Sequential U.S. States on a Map | 0 | - | 4.99 | 234,126 |
| U.S. Map with Random Merged States | 0 | - | 4.94 | 301,943 |
| United States Map Quiz | 0 | - | 4.98 | 4,153,635 |
| Arms Exports - United States | 0 | - | 4.75 | 62,250 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,039 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,240 |
| First Ladies of the United States | 0 | - | 4.28 | 85,532 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,924 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,197 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 76,919 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,157 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,298 |
| Add a Letter - Make a U.S. President | 0 | - | 4.57 | 23,929 |
| Category Elimination - U.S. States #1 | 0 | - | 4.88 | 220,294 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 133,819 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,791 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 88,735 |
| The Iraq War | 0 | - | 4.47 | 15,635 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,642 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,467 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,165 |
| The Jimmy Carter Presidency | 0 | - | 4.41 | 19,114 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,624 |
| U.S. President Scramble | 0 | - | 4.40 | 116,624 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,141 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 68,777 |
| Countries of the Soviet Union | 0 | - | 4.98 | 194,417 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,595 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,599 |
| African Countries with the Most Christians | 0 | - | 4.94 | 75,420 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,348 |
| Name the U.S. National Parks | 0 | - | 4.86 | 59,770 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,148 |
| Total United States Immigration by Country | 0 | - | 4.91 | 111,306 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,318 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 174,172 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 243,151 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 330,991 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,795 |
| Win the U.S. Presidential Election | 0 | - | 4.78 | 625,131 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 28,597 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 20,028 |
| The George Washington Presidency | 0 | - | 4.03 | 14,531 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,712 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,614 |
| The John Adams Presidency | 0 | - | 4.12 | 8,730 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,914 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,726 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,656 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 69,852 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,833 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 73,722 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,066 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 39,809 |
| U.S. Civil War Decoder | 0 | - | 4.14 | 25,250 |
| US States Quiz | 0 | - | 5.00 | 16,828,730 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 366,557 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,866 |
| Countries of Europe in 1848 | 0 | - | 4.99 | 76,105 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,271 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,693 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,589 |
| Countries of the German Empire | 0 | - | 4.51 | 37,862 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 115,691 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,204 |
| Asian Countries with the Most Christians | 0 | - | 4.85 | 96,991 |
| The Persian Gulf War | 0 | - | 4.02 | 8,442 |
| George Washington... or George W. Bush? | 0 | - | 4.16 | 12,257 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 81,138 |
| Biggest Trading Partners – Australia | 0 | - | 4.93 | 61,412 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,095 |
| Pixelated United States Map | 0 | - | 4.87 | 94,056 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 109,322 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 91,501 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 146,123 |
| Countries that Beat the United States | 0 | - | 4.93 | 166,514 |
| Presidential Actors | 0 | - | 4.36 | 19,149 |
| The Bill Clinton Presidency | 0 | - | 4.24 | 31,432 |
| The George H. W. Bush Presidency | 0 | - | 4.36 | 21,474 |
| The Ronald Reagan Presidency | 0 | - | 4.26 | 24,799 |
| The Richard Nixon Presidency | 0 | - | 4.05 | 21,998 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,839 |
| The Barack Obama Presidency | 0 | - | 4.16 | 25,364 |
| The Kennedy Family | 0 | - | 3.90 | 14,059 |
| Six Flags Over Texas | 0 | - | 4.78 | 63,267 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,089 |
| U.S. History for Dummies | 0 | - | 4.47 | 82,917 |
| The American Civil War | 0 | - | 4.62 | 52,367 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 117,629 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 505,370 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 111,149 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 113,190 |
| U.S. States with Short Names | 0 | - | 4.91 | 148,674 |
| U.S. States that Start with M | 0 | - | 4.93 | 186,948 |
| U.S. States By Population | 0 | - | 4.92 | 152,992 |
| U.S. States that Start with N | 0 | - | 4.95 | 171,173 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,306 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 48,365 |
| US States with an Empty Map | 0 | - | 5.00 | 623,184 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 82,368 |
| States in a Tank of the U.S. Map | 0 | - | 4.47 | 31,181 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,113 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,098 |
| Draw All US State Borders | 0 | - | 4.99 | 136,537 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 65,447 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 159,759 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 177,498 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 125,036 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,417 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 86,106 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,590 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,334 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.85 | 67,362 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 95,699 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 132,868 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 165,147 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 103,467 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 60,904 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,515 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,083 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,356 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 237,155 |
| Prime Ministers of the UK | 0 | - | 4.95 | 437,738 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 69,678 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,550 |
| Countries Bordering China Since 1914 | 0 | - | 4.93 | 95,092 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 89,037 |
| Random American Countries on a Map | 0 | - | 4.96 | 99,284 |
| Rivers of the United States | 0 | - | 4.93 | 66,064 |
| Names of Generations | 0 | - | 4.10 | 44,058 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 117,967 |
| U.S. Senators by State | 0 | - | 4.45 | 39,902 |
| Top 10 U.S. States by Republican Party Support | 0 | - | 4.44 | 75,418 |
| Top 10 U.S. States by Democratic Party Support | 0 | - | 4.63 | 81,213 |
| Top 10 U.S. Swing States in the 2024 Election | 0 | - | 4.51 | 75,128 |
| Movies with America in the Title | 0 | - | 4.17 | 28,753 |
| Countries Closest to Alaska | 0 | - | 4.93 | 124,092 |
| Stephen Curry Quiz | 0 | - | 4.37 | 66,784 |
| History of Florida | 0 | - | 4.45 | 9,809 |
| The Life of Martin Luther King Jr. | 0 | - | 4.73 | 11,097 |
| Hawaiian Islands | 0 | - | 4.83 | 42,648 |
| Countries Closest to Maine | 0 | - | 4.85 | 66,963 |
| Harvard University | 0 | - | 4.15 | 8,290 |
| History of Texas | 0 | - | 4.43 | 14,602 |
| LeBron James Trivia | 0 | - | 4.01 | 170,617 |
| LeBron... or Kobe? | 0 | - | 4.04 | 69,747 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,264 |
| American History Quotes #1 | 0 | - | 4.37 | 95,955 |
| People on Money - United States | 0 | - | 4.31 | 63,318 |
| American History Quotes #2 | 0 | - | 4.38 | 41,370 |
| Old West History | 0 | - | 4.33 | 15,257 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,404 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 44,986 |
| Life of Benjamin Franklin | 0 | - | 4.24 | 6,517 |
| American Revolution - Multiple Choice | 0 | - | 4.34 | 19,912 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,707 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,213 |
| Fifty US States in One Minute | 0 | - | 4.61 | 3,533,363 |
| U.S. State Flags | 0 | - | 4.89 | 169,685 |
| U.S. States that Border Canada | 0 | - | 4.91 | 184,302 |
| U.S. States by Church Attendance | 0 | - | 4.59 | 32,386 |
| U.S. States with the Most Billionaires | 0 | - | 4.51 | 50,305 |
| Top U.S. States in Crude Oil Production | 0 | - | 4.51 | 41,062 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 208,394 |
| U.S. States Richer than Their Neighbors | 0 | - | 4.43 | 27,338 |
| Great Plains States and Provinces on a Map | 0 | - | 4.95 | 49,218 |
| Least Visited U.S. States by JetPunkers | 0 | - | 4.44 | 70,556 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 124,462 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 125,383 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 91,792 |
