| U.S. Presidents Quiz | 0 | - | 5.00 | 3,711,634 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 192,767 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 109,002 |
| U.S. Presidents by Event | 0 | - | 4.58 | 34,808 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.62 | 94,195 |
| Presidential Middle Names | 0 | - | 4.41 | 60,468 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,486 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,694 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,509 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 35,074 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 70,267 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 382,505 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,592 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,298 |
| First Ladies of the United States | 0 | - | 4.28 | 85,781 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,254 |
| U.S. Presidents in Order by First Letter | 0 | - | 4.32 | 77,301 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,250 |
| Add a Letter - Make a U.S. President | 0 | - | 4.58 | 24,015 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,865 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,988 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 427,295 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,968 |
| U.S. Presidents by Picture - Multiple Choice | 0 | - | 4.50 | 28,915 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 28,688 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,753 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,679 |
| The John Adams Presidency | 0 | - | 4.12 | 8,764 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,751 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,874 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,539 |
| The George Washington Presidency | 0 | - | 4.03 | 14,571 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,952 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,338 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,715 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 305,604 |
| Vietnam War Countries | 0 | - | 4.82 | 94,404 |
| George Washington... or George W. Bush? | 0 | - | 4.16 | 12,276 |
| U.S. President Scramble | 0 | - | 4.40 | 117,167 |
| U.S. Senators by State | 0 | - | 4.44 | 40,019 |
| U.S. Presidents True or False | 0 | - | 3.96 | 15,620 |
| The Kennedy Family | 0 | - | 3.90 | 14,084 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,551 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,218 |
| The John F. Kennedy Presidency | 0 | - | 4.47 | 43,816 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,352 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 129,446 |
| Mississippi River States Empty Map Quiz | 0 | - | 4.82 | 56,090 |
| Win the U.S. Presidential Election | 0 | - | 4.78 | 630,921 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 20,125 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,241 |
| The American Revolution | 0 | - | 4.52 | 54,297 |
| United States Map Quiz | 0 | - | 4.98 | 4,164,798 |
| The Jimmy Carter Presidency | 0 | - | 4.41 | 19,167 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,782 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,670 |
| The Barack Obama Presidency | 0 | - | 4.13 | 25,435 |
| Harvard University | 0 | - | 4.15 | 8,309 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,834 |
| Rust Belt Cities Map Quiz | 0 | - | 4.57 | 35,179 |
| Top 10 U.S. States by Republican Party Support | 0 | - | 4.44 | 75,651 |
| Top 10 U.S. States by Democratic Party Support | 0 | - | 4.63 | 81,484 |
| Presidential Actors | 0 | - | 4.36 | 19,207 |
| Random U.S. Presidents by Picture | 0 | - | 4.40 | 66,380 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 69,787 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 89,293 |
| Countries of the Soviet Union | 0 | - | 4.98 | 195,211 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,725 |
| The Iraq War | 0 | - | 4.47 | 15,678 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,652 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,826 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,670 |
| Top 10 U.S. Swing States in the 2024 Election | 0 | - | 4.51 | 75,311 |
| The Bill Clinton Presidency | 0 | - | 4.24 | 31,488 |
| The George H. W. Bush Presidency | 0 | - | 4.36 | 21,518 |
| The Ronald Reagan Presidency | 0 | - | 4.26 | 24,853 |
| The Richard Nixon Presidency | 0 | - | 4.05 | 22,055 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 74,504 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 40,076 |
| US States Quiz | 0 | - | 5.00 | 16,932,285 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 367,929 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,857 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 83,888 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,217 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,425 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,225 |
| Soviet Union Country Quiz | 0 | - | 4.91 | 80,914 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 145,088 |
| Name the U.S. National Parks | 0 | - | 4.86 | 60,177 |
| Total United States Immigration by Country | 0 | - | 4.91 | 111,966 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 174,993 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 245,132 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 333,623 |
| Pixelated United States Map | 0 | - | 4.88 | 94,521 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 110,050 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 92,073 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,116 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,970 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,837 |
| George Bush... or George Bush | 0 | - | 3.98 | 8,221 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,467 |
| Las Vegas Casinos | 0 | - | 4.13 | 38,096 |
| Six Flags Over Texas | 0 | - | 4.78 | 63,480 |
| U.S. History for Dummies | 0 | - | 4.47 | 83,230 |
| The Most Recent... United States | 0 | - | 4.46 | 18,515 |
| U.S. Civil War Decoder | 0 | - | 4.14 | 25,304 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 118,186 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 111,797 |
| 10 Southernmost U.S. States | 0 | - | 4.89 | 113,731 |
| U.S. States with Short Names | 0 | - | 4.91 | 149,430 |
| U.S. States that Start with M | 0 | - | 4.93 | 187,750 |
| U.S. States By Population | 0 | - | 4.92 | 153,812 |
| U.S. States that Start with N | 0 | - | 4.95 | 171,803 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,636 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 82,744 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,577 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,357 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 65,838 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 160,338 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 177,982 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 125,450 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,699 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 86,477 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.85 | 67,775 |
| All Modern-Day Countries Ever Controlled by Greeks | 0 | - | 4.98 | 54,394 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 61,368 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 116,371 |
| Countries of Iberia in History with a Map | 0 | - | 4.88 | 42,135 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,582 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,148 |
| The Persian Gulf War | 0 | - | 4.02 | 8,468 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,836 |
| All Modern-Day Countries Ever Controlled by Chinese People | 0 | - | 4.82 | 54,992 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,163 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 81,468 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,265 |
| Rivers of the United States | 0 | - | 4.93 | 66,399 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 146,785 |
| Countries that Beat the United States | 0 | - | 4.93 | 167,949 |
| American Revolution Decoder | 0 | - | 4.10 | 20,973 |
| Countries Closest to Alaska | 0 | - | 4.93 | 124,693 |
| California A-Z | 0 | - | 4.49 | 28,811 |
| Top 10 Los Angeles Lakers of All-Time | 0 | - | 4.24 | 47,043 |
| Countries Closest to Maine | 0 | - | 4.85 | 67,326 |
| Events in U.S. History | 0 | - | 4.41 | 28,732 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,145 |
| The American Civil War | 0 | - | 4.62 | 52,514 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 508,250 |
| U.S. States by Church Attendance | 0 | - | 4.59 | 32,494 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 48,914 |
| US States with an Empty Map | 0 | - | 5.00 | 626,440 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 209,630 |
| Great Plains States and Provinces on a Map | 0 | - | 4.95 | 49,728 |
| Draw All US State Borders | 0 | - | 4.99 | 139,063 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 125,396 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 126,047 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 92,412 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 102,005 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,650 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 62,051 |
| Merged U.S. States | 0 | - | 4.37 | 44,279 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 96,502 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 133,623 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 165,730 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 104,185 |
| All Modern-Day Countries Ever Controlled by French People | 0 | - | 4.99 | 58,277 |
| Least Irish U.S. States | 0 | - | 4.49 | 18,345 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,805 |
| Ultimate Harry Potter Name Game | 0 | - | 4.94 | 494,107 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 237,828 |
| Vatican City Country Quiz | 0 | - | 4.53 | 44,503 |
| Most-Visited Countries by Popes | 0 | - | 4.56 | 83,925 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 70,174 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 83,063 |
| Countries Bordering China Since 1914 | 0 | - | 4.92 | 95,623 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 89,582 |
| Random American Countries on a Map | 0 | - | 4.96 | 99,850 |
| South America Flags Map Quiz | 0 | - | 4.95 | 88,441 |
| Most-Spoken Languages of the United States | 0 | - | 4.52 | 221,146 |
| Names of Generations | 0 | - | 4.09 | 45,263 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 118,416 |
| Most Common High School Mascots | 0 | - | 4.47 | 32,209 |
| American Founding Fathers | 0 | - | 4.42 | 23,248 |
| History of Florida | 0 | - | 4.45 | 9,849 |
| The Life of Martin Luther King Jr. | 0 | - | 4.73 | 11,118 |
| Hawaiian Islands | 0 | - | 4.83 | 42,800 |
| Boston Red Sox Trivia | 0 | - | 4.09 | 7,562 |
| New York Yankees Trivia | 0 | - | 4.29 | 7,235 |
| History of Texas | 0 | - | 4.43 | 14,662 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,411 |
| American History Quotes #1 | 0 | - | 4.37 | 96,122 |
| People on Money - United States | 0 | - | 4.31 | 63,385 |
| American History Quotes #2 | 0 | - | 4.38 | 41,460 |
| Old West History | 0 | - | 4.34 | 15,288 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,526 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,146 |
| Life of Benjamin Franklin | 0 | - | 4.24 | 6,529 |
| American Revolution - Multiple Choice | 0 | - | 4.34 | 19,962 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,752 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,290 |
