| U.S. Presidents Quiz | 0 | - | 5.00 | 3,717,203 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 193,242 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 109,138 |
| U.S. Presidents by Event | 0 | - | 4.58 | 35,009 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.62 | 94,376 |
| Presidential Middle Names | 0 | - | 4.41 | 60,575 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,552 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,778 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,558 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 35,134 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 70,406 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 383,039 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,732 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,326 |
| U.S. Presidential Running Mates | 0 | - | 4.41 | 28,710 |
| First Ladies of the United States | 0 | - | 4.28 | 85,834 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,276 |
| U.S. Presidents in Order by First Letter | 0 | - | 4.32 | 77,364 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,303 |
| Add a Letter - Make a U.S. President | 0 | - | 4.58 | 24,055 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,905 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 24,023 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 427,830 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 48,021 |
| U.S. Presidents by Picture - Multiple Choice | 0 | - | 4.50 | 28,966 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,762 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,718 |
| The John Adams Presidency | 0 | - | 4.12 | 8,770 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,758 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,715 |
| The George Washington Presidency | 0 | - | 4.03 | 14,583 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,962 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,353 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,736 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 305,890 |
| Vietnam War Countries | 0 | - | 4.82 | 94,487 |
| George Washington... or George W. Bush? | 0 | - | 4.16 | 12,286 |
| U.S. President Scramble | 0 | - | 4.40 | 117,322 |
| U.S. Senators by State | 0 | - | 4.44 | 40,051 |
| U.S. Presidents True or False | 0 | - | 3.96 | 15,629 |
| The Kennedy Family | 0 | - | 3.90 | 14,090 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,579 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,252 |
| The John F. Kennedy Presidency | 0 | - | 4.47 | 43,874 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,525 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 129,509 |
| Mississippi River States Empty Map Quiz | 0 | - | 4.83 | 56,145 |
| Win the U.S. Presidential Election | 0 | - | 4.78 | 632,380 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 20,130 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,294 |
| The American Revolution | 0 | - | 4.52 | 54,318 |
| United States Map Quiz | 0 | - | 4.98 | 4,167,022 |
| The Jimmy Carter Presidency | 0 | - | 4.41 | 19,197 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,871 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,746 |
| The Barack Obama Presidency | 0 | - | 4.13 | 25,465 |
| Harvard University | 0 | - | 4.15 | 8,316 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,910 |
| Rust Belt Cities Map Quiz | 0 | - | 4.57 | 35,221 |
| Top 10 U.S. States by Republican Party Support | 0 | - | 4.44 | 75,709 |
| Top 10 U.S. States by Democratic Party Support | 0 | - | 4.63 | 81,556 |
| Presidential Actors | 0 | - | 4.36 | 19,223 |
| Random U.S. Presidents by Picture | 0 | - | 4.40 | 66,467 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 70,010 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 89,462 |
| Countries of the Soviet Union | 0 | - | 4.98 | 195,342 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,770 |
| The Iraq War | 0 | - | 4.47 | 15,689 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,743 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,546 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,778 |
| Top 10 U.S. Swing States in the 2024 Election | 0 | - | 4.51 | 75,358 |
| The Bill Clinton Presidency | 0 | - | 4.24 | 31,506 |
| The George H. W. Bush Presidency | 0 | - | 4.36 | 21,534 |
| The Ronald Reagan Presidency | 0 | - | 4.26 | 24,867 |
| The Richard Nixon Presidency | 0 | - | 4.05 | 22,071 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 74,722 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 40,155 |
| US States Quiz | 0 | - | 5.00 | 16,955,230 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 368,165 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,030 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 84,520 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,437 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,567 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,344 |
| U.S. States Closest to Moscow | 0 | - | 4.50 | 48,196 |
| Soviet Union Country Quiz | 0 | - | 4.91 | 81,011 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 145,279 |
| Name the U.S. National Parks | 0 | - | 4.86 | 60,305 |
| Total United States Immigration by Country | 0 | - | 4.91 | 112,112 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 175,216 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 245,643 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 334,277 |
| Pixelated United States Map | 0 | - | 4.88 | 94,630 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 110,225 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 92,211 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,129 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 73,020 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,849 |
| George Bush... or George Bush | 0 | - | 3.98 | 8,230 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,567 |
| Las Vegas Casinos | 0 | - | 4.13 | 38,112 |
| Six Flags Over Texas | 0 | - | 4.78 | 63,530 |
| U.S. History for Dummies | 0 | - | 4.47 | 83,306 |
| The Most Recent... United States | 0 | - | 4.46 | 18,537 |
| U.S. Civil War Decoder | 0 | - | 4.14 | 25,320 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 118,743 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 111,951 |
| 10 Southernmost U.S. States | 0 | - | 4.89 | 113,969 |
| U.S. States with Short Names | 0 | - | 4.91 | 149,599 |
| U.S. States that Start with M | 0 | - | 4.93 | 187,962 |
| U.S. States By Population | 0 | - | 4.92 | 153,920 |
| U.S. States that Start with N | 0 | - | 4.95 | 171,952 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,731 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 82,924 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,689 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,429 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 65,935 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 160,475 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 178,061 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 125,550 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,744 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 86,537 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.85 | 67,869 |
| All Modern-Day Countries Ever Controlled by Greeks | 0 | - | 4.98 | 54,477 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 61,477 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 116,528 |
| Countries of Iberia in History with a Map | 0 | - | 4.88 | 42,227 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,685 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,382 |
| The Persian Gulf War | 0 | - | 4.02 | 8,471 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,930 |
| All Modern-Day Countries Ever Controlled by Chinese People | 0 | - | 4.82 | 55,063 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,302 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 81,549 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,315 |
| Rivers of the United States | 0 | - | 4.93 | 66,515 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 146,934 |
| Countries that Beat the United States | 0 | - | 4.93 | 168,260 |
| American Revolution Decoder | 0 | - | 4.10 | 20,979 |
| Countries Closest to Alaska | 0 | - | 4.93 | 124,866 |
| California A-Z | 0 | - | 4.49 | 28,821 |
| Top 10 Los Angeles Lakers of All-Time | 0 | - | 4.24 | 47,111 |
| Countries Closest to Maine | 0 | - | 4.85 | 67,435 |
| Events in U.S. History | 0 | - | 4.41 | 28,776 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,169 |
| The American Civil War | 0 | - | 4.62 | 52,568 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 508,905 |
| U.S. States by Church Attendance | 0 | - | 4.59 | 32,520 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 49,068 |
| US States with an Empty Map | 0 | - | 5.00 | 627,249 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 209,926 |
| Great Plains States and Provinces on a Map | 0 | - | 4.95 | 49,904 |
| Draw All US State Borders | 0 | - | 4.99 | 139,632 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 125,649 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 126,271 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 92,602 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 102,241 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,881 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.83 | 62,120 |
| Merged U.S. States | 0 | - | 4.37 | 44,328 |
| Draw All US State Borders - Extreme | 0 | - | 4.99 | 78,998 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 96,722 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 133,838 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 166,197 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 104,381 |
| All Modern-Day Countries Ever Controlled by French People | 0 | - | 4.99 | 58,359 |
| Least Irish U.S. States | 0 | - | 4.49 | 18,364 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,900 |
| Ultimate Harry Potter Name Game | 0 | - | 4.94 | 494,313 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 237,977 |
| Vatican City Country Quiz | 0 | - | 4.53 | 44,568 |
| Most-Visited Countries by Popes | 0 | - | 4.56 | 84,036 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 70,345 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 83,206 |
| Countries Bordering China Since 1914 | 0 | - | 4.92 | 95,712 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 89,736 |
| Random American Countries on a Map | 0 | - | 4.96 | 99,982 |
| South America Flags Map Quiz | 0 | - | 4.95 | 88,627 |
| Most-Spoken Languages of the United States | 0 | - | 4.52 | 221,647 |
| Names of Generations | 0 | - | 4.09 | 45,355 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 118,519 |
| Most Common High School Mascots | 0 | - | 4.47 | 32,244 |
| American Founding Fathers | 0 | - | 4.42 | 23,254 |
| History of Florida | 0 | - | 4.45 | 9,862 |
| The Life of Martin Luther King Jr. | 0 | - | 4.73 | 11,129 |
| Hawaiian Islands | 0 | - | 4.83 | 42,840 |
| Boston Red Sox Trivia | 0 | - | 4.09 | 7,566 |
| New York Yankees Trivia | 0 | - | 4.29 | 7,251 |
| History of Texas | 0 | - | 4.43 | 14,673 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,452 |
| American History Quotes #1 | 0 | - | 4.37 | 96,158 |
| People on Money - United States | 0 | - | 4.31 | 63,398 |
| American History Quotes #2 | 0 | - | 4.38 | 41,478 |
| Old West History | 0 | - | 4.34 | 15,292 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,551 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,167 |
| Life of Benjamin Franklin | 0 | - | 4.24 | 6,529 |
| American Revolution - Multiple Choice | 0 | - | 4.34 | 19,970 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,764 |
