| U.S. Presidents Quiz | 0 | - | 5.00 | 3,706,397 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 192,498 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 108,891 |
| U.S. Presidents by Event | 0 | - | 4.58 | 34,674 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.62 | 93,955 |
| Presidential Middle Names | 0 | - | 4.41 | 60,376 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,437 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,651 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,469 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 35,034 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 70,182 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 382,205 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,431 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,276 |
| First Ladies of the United States | 0 | - | 4.28 | 85,719 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,243 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,230 |
| Add a Letter - Make a U.S. President | 0 | - | 4.57 | 23,993 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,849 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,976 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 426,935 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,937 |
| U.S. Presidents by Picture - Multiple Choice | 0 | - | 4.50 | 28,886 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 28,668 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,747 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,662 |
| The John Adams Presidency | 0 | - | 4.12 | 8,759 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,747 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,867 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,431 |
| The George Washington Presidency | 0 | - | 4.03 | 14,560 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,946 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,332 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,700 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 305,298 |
| Vietnam War Countries | 0 | - | 4.82 | 94,338 |
| George Washington... or George W. Bush? | 0 | - | 4.16 | 12,272 |
| U.S. President Scramble | 0 | - | 4.40 | 116,892 |
| U.S. Senators by State | 0 | - | 4.44 | 39,993 |
| U.S. Presidents True or False | 0 | - | 3.96 | 15,617 |
| The Kennedy Family | 0 | - | 3.90 | 14,082 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,530 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,210 |
| The John F. Kennedy Presidency | 0 | - | 4.47 | 43,787 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,021 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 129,384 |
| Mississippi River States Empty Map Quiz | 0 | - | 4.82 | 56,037 |
| Win the U.S. Presidential Election | 0 | - | 4.78 | 629,555 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 20,109 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,211 |
| The American Revolution | 0 | - | 4.52 | 54,287 |
| United States Map Quiz | 0 | - | 4.98 | 4,162,721 |
| The Jimmy Carter Presidency | 0 | - | 4.41 | 19,155 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,736 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,628 |
| The Barack Obama Presidency | 0 | - | 4.13 | 25,422 |
| Harvard University | 0 | - | 4.15 | 8,304 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,798 |
| Rust Belt Cities Map Quiz | 0 | - | 4.57 | 35,152 |
| Top 10 U.S. States by Republican Party Support | 0 | - | 4.44 | 75,593 |
| Top 10 U.S. States by Democratic Party Support | 0 | - | 4.63 | 81,434 |
| Presidential Actors | 0 | - | 4.36 | 19,194 |
| Random U.S. Presidents by Picture | 0 | - | 4.40 | 66,331 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 69,556 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 89,159 |
| Countries of the Soviet Union | 0 | - | 4.98 | 194,767 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,678 |
| The Iraq War | 0 | - | 4.47 | 15,670 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,578 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,699 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,582 |
| Top 10 U.S. Swing States in the 2024 Election | 0 | - | 4.51 | 75,276 |
| The Bill Clinton Presidency | 0 | - | 4.24 | 31,478 |
| The George H. W. Bush Presidency | 0 | - | 4.36 | 21,511 |
| The Ronald Reagan Presidency | 0 | - | 4.26 | 24,842 |
| The Richard Nixon Presidency | 0 | - | 4.05 | 22,036 |
| Cities and Towns of Massachusetts | 0 | - | 4.93 | 74,320 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 40,017 |
| US States Quiz | 0 | - | 5.00 | 16,909,722 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 367,576 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,676 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 83,126 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,027 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,270 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,095 |
| U.S. States Closest to Moscow | 0 | - | 4.50 | 48,106 |
| Soviet Union Country Quiz | 0 | - | 4.91 | 80,838 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 144,900 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,049 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 81,387 |
| Name the U.S. National Parks | 0 | - | 4.86 | 60,083 |
| Total United States Immigration by Country | 0 | - | 4.91 | 111,823 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 174,783 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 244,685 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 332,912 |
| Pixelated United States Map | 0 | - | 4.88 | 94,420 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 109,892 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 91,956 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,100 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,926 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,827 |
| George Bush... or George Bush | 0 | - | 3.98 | 8,209 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,354 |
| Las Vegas Casinos | 0 | - | 4.13 | 38,085 |
| Six Flags Over Texas | 0 | - | 4.78 | 63,426 |
| U.S. History for Dummies | 0 | - | 4.47 | 83,171 |
| The Most Recent... United States | 0 | - | 4.45 | 18,486 |
| U.S. Civil War Decoder | 0 | - | 4.14 | 25,292 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 118,098 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 111,657 |
| 10 Southernmost U.S. States | 0 | - | 4.89 | 113,622 |
| U.S. States with Short Names | 0 | - | 4.91 | 149,263 |
| U.S. States that Start with M | 0 | - | 4.93 | 187,581 |
| U.S. States By Population | 0 | - | 4.92 | 153,702 |
| U.S. States that Start with N | 0 | - | 4.95 | 171,659 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,566 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 82,671 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,461 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,310 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 65,757 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 160,245 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 177,926 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 125,386 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,649 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 86,416 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.85 | 67,694 |
| All Modern-Day Countries Ever Controlled by Greeks | 0 | - | 4.98 | 54,290 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 61,263 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 116,219 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 42,027 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,460 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,925 |
| The Persian Gulf War | 0 | - | 4.02 | 8,460 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,776 |
| All Modern-Day Countries Ever Controlled by Chinese People | 0 | - | 4.82 | 54,922 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,222 |
| Rivers of the United States | 0 | - | 4.93 | 66,300 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 146,639 |
| Countries that Beat the United States | 0 | - | 4.93 | 167,764 |
| American Revolution Decoder | 0 | - | 4.10 | 20,969 |
| Countries Closest to Alaska | 0 | - | 4.93 | 124,530 |
| California A-Z | 0 | - | 4.49 | 28,802 |
| Top 10 Los Angeles Lakers of All-Time | 0 | - | 4.24 | 46,987 |
| Countries Closest to Maine | 0 | - | 4.85 | 67,233 |
| Events in U.S. History | 0 | - | 4.41 | 28,701 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,130 |
| The American Civil War | 0 | - | 4.62 | 52,485 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 507,622 |
| U.S. States by Church Attendance | 0 | - | 4.59 | 32,468 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 48,798 |
| US States with an Empty Map | 0 | - | 5.00 | 625,746 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 209,365 |
| Great Plains States and Provinces on a Map | 0 | - | 4.95 | 49,632 |
| Draw All US State Borders | 0 | - | 4.99 | 138,386 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 125,246 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 125,882 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 92,289 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,907 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,587 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,978 |
| Merged U.S. States | 0 | - | 4.37 | 44,233 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 96,312 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 133,444 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 165,599 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 104,037 |
| All Modern-Day Countries Ever Controlled by French People | 0 | - | 4.99 | 58,204 |
| Least Irish U.S. States | 0 | - | 4.49 | 18,333 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,698 |
| Ultimate Harry Potter Name Game | 0 | - | 4.94 | 493,690 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 237,637 |
| Vatican City Country Quiz | 0 | - | 4.53 | 44,446 |
| Most-Visited Countries by Popes | 0 | - | 4.56 | 83,835 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 70,070 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 82,942 |
| Countries Bordering China Since 1914 | 0 | - | 4.92 | 95,508 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 89,464 |
| Colonies of Africa with a Map | 0 | - | 4.78 | 54,531 |
| Random American Countries on a Map | 0 | - | 4.96 | 99,726 |
| South America Flags Map Quiz | 0 | - | 4.95 | 88,221 |
| Most-Spoken Languages of the United States | 0 | - | 4.52 | 220,639 |
| Names of Generations | 0 | - | 4.09 | 45,144 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 118,318 |
| Most Common High School Mascots | 0 | - | 4.47 | 32,177 |
| American Founding Fathers | 0 | - | 4.42 | 23,234 |
| History of Florida | 0 | - | 4.45 | 9,839 |
| The Life of Martin Luther King Jr. | 0 | - | 4.73 | 11,110 |
| Hawaiian Islands | 0 | - | 4.83 | 42,765 |
| Boston Red Sox Trivia | 0 | - | 4.09 | 7,558 |
| New York Yankees Trivia | 0 | - | 4.29 | 7,227 |
| History of Texas | 0 | - | 4.43 | 14,647 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,366 |
| American History Quotes #1 | 0 | - | 4.37 | 96,083 |
| People on Money - United States | 0 | - | 4.31 | 63,365 |
| American History Quotes #2 | 0 | - | 4.38 | 41,435 |
| Old West History | 0 | - | 4.34 | 15,284 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,501 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,113 |
| Life of Benjamin Franklin | 0 | - | 4.24 | 6,525 |
| American Revolution - Multiple Choice | 0 | - | 4.34 | 19,950 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,746 |
