| U.S. Presidents Quiz | 0 | - | 5.00 | 3,715,698 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 193,144 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 109,099 |
| U.S. Presidents by Event | 0 | - | 4.58 | 34,984 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 94,335 |
| Presidential Middle Names | 0 | - | 4.41 | 60,555 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,544 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,760 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,553 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 35,123 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 70,384 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 382,927 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,706 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,319 |
| First Ladies of the United States | 0 | - | 4.28 | 85,821 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,269 |
| U.S. Presidents in Order by First Letter | 0 | - | 4.32 | 77,332 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,292 |
| Add a Letter - Make a U.S. President | 0 | - | 4.58 | 24,050 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,896 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 24,016 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 427,730 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 48,015 |
| U.S. Presidents by Picture - Multiple Choice | 0 | - | 4.50 | 28,957 |
| U.S. Presidential Running Mates | 0 | - | 4.41 | 28,704 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,761 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,715 |
| The John Adams Presidency | 0 | - | 4.12 | 8,769 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,755 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,885 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,681 |
| The George Washington Presidency | 0 | - | 4.03 | 14,580 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,957 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,346 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,732 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 305,808 |
| Vietnam War Countries | 0 | - | 4.82 | 94,466 |
| George Washington... or George W. Bush? | 0 | - | 4.16 | 12,284 |
| U.S. President Scramble | 0 | - | 4.40 | 117,291 |
| U.S. Senators by State | 0 | - | 4.44 | 40,040 |
| U.S. Presidents True or False | 0 | - | 3.96 | 15,627 |
| The Kennedy Family | 0 | - | 3.90 | 14,088 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,570 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,241 |
| The John F. Kennedy Presidency | 0 | - | 4.47 | 43,865 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,467 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 129,488 |
| Mississippi River States Empty Map Quiz | 0 | - | 4.83 | 56,132 |
| Win the U.S. Presidential Election | 0 | - | 4.78 | 631,914 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 20,128 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,281 |
| The American Revolution | 0 | - | 4.52 | 54,314 |
| United States Map Quiz | 0 | - | 4.98 | 4,166,410 |
| The Jimmy Carter Presidency | 0 | - | 4.41 | 19,188 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,857 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,738 |
| The Barack Obama Presidency | 0 | - | 4.13 | 25,459 |
| Harvard University | 0 | - | 4.15 | 8,315 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,892 |
| Rust Belt Cities Map Quiz | 0 | - | 4.57 | 35,209 |
| Top 10 U.S. States by Republican Party Support | 0 | - | 4.44 | 75,688 |
| Top 10 U.S. States by Democratic Party Support | 0 | - | 4.63 | 81,538 |
| Presidential Actors | 0 | - | 4.36 | 19,218 |
| Random U.S. Presidents by Picture | 0 | - | 4.40 | 66,457 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 69,960 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 89,415 |
| Countries of the Soviet Union | 0 | - | 4.98 | 195,317 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,762 |
| The Iraq War | 0 | - | 4.47 | 15,687 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,723 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,507 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,751 |
| Top 10 U.S. Swing States in the 2024 Election | 0 | - | 4.51 | 75,345 |
| The Bill Clinton Presidency | 0 | - | 4.24 | 31,504 |
| The George H. W. Bush Presidency | 0 | - | 4.36 | 21,532 |
| The Ronald Reagan Presidency | 0 | - | 4.26 | 24,865 |
| The Richard Nixon Presidency | 0 | - | 4.05 | 22,069 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 74,671 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 40,140 |
| US States Quiz | 0 | - | 5.00 | 16,948,692 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 368,090 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,990 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 84,368 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,378 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,526 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,303 |
| U.S. States Closest to Moscow | 0 | - | 4.50 | 48,181 |
| Soviet Union Country Quiz | 0 | - | 4.91 | 80,977 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 145,227 |
| Name the U.S. National Parks | 0 | - | 4.86 | 60,269 |
| Total United States Immigration by Country | 0 | - | 4.91 | 112,075 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 175,156 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 245,488 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 334,098 |
| Pixelated United States Map | 0 | - | 4.88 | 94,607 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 110,172 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 92,176 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,125 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 73,006 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,843 |
| George Bush... or George Bush | 0 | - | 3.98 | 8,226 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,540 |
| Las Vegas Casinos | 0 | - | 4.13 | 38,109 |
| Six Flags Over Texas | 0 | - | 4.78 | 63,518 |
| U.S. History for Dummies | 0 | - | 4.47 | 83,281 |
| The Most Recent... United States | 0 | - | 4.46 | 18,529 |
| U.S. Civil War Decoder | 0 | - | 4.14 | 25,317 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 118,691 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 111,916 |
| 10 Southernmost U.S. States | 0 | - | 4.89 | 113,915 |
| U.S. States with Short Names | 0 | - | 4.91 | 149,541 |
| U.S. States that Start with M | 0 | - | 4.93 | 187,907 |
| U.S. States By Population | 0 | - | 4.92 | 153,892 |
| U.S. States that Start with N | 0 | - | 4.95 | 171,905 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,704 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 82,896 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,656 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,418 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 65,915 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 160,440 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 178,041 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 125,521 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,733 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 86,518 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.85 | 67,845 |
| All Modern-Day Countries Ever Controlled by Greeks | 0 | - | 4.98 | 54,462 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 61,443 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 116,488 |
| Countries of Iberia in History with a Map | 0 | - | 4.88 | 42,203 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,655 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,309 |
| The Persian Gulf War | 0 | - | 4.02 | 8,471 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,909 |
| All Modern-Day Countries Ever Controlled by Chinese People | 0 | - | 4.82 | 55,047 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,262 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 81,526 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,304 |
| Rivers of the United States | 0 | - | 4.93 | 66,461 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 146,894 |
| Countries that Beat the United States | 0 | - | 4.93 | 168,177 |
| American Revolution Decoder | 0 | - | 4.10 | 20,976 |
| Countries Closest to Alaska | 0 | - | 4.93 | 124,817 |
| California A-Z | 0 | - | 4.49 | 28,820 |
| Top 10 Los Angeles Lakers of All-Time | 0 | - | 4.24 | 47,093 |
| Countries Closest to Maine | 0 | - | 4.85 | 67,400 |
| Events in U.S. History | 0 | - | 4.41 | 28,767 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,157 |
| The American Civil War | 0 | - | 4.62 | 52,557 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 508,728 |
| U.S. States by Church Attendance | 0 | - | 4.59 | 32,517 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 49,016 |
| US States with an Empty Map | 0 | - | 5.00 | 626,995 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 209,832 |
| Great Plains States and Provinces on a Map | 0 | - | 4.95 | 49,864 |
| Draw All US State Borders | 0 | - | 4.99 | 139,473 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 125,538 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 126,178 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 92,552 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 102,129 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,764 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 62,097 |
| Merged U.S. States | 0 | - | 4.37 | 44,310 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 96,651 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 133,781 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 166,006 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 104,324 |
| All Modern-Day Countries Ever Controlled by French People | 0 | - | 4.99 | 58,337 |
| Least Irish U.S. States | 0 | - | 4.49 | 18,359 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,874 |
| Ultimate Harry Potter Name Game | 0 | - | 4.94 | 494,262 |
| Commonwealth of Nations Countries | 0 | - | 4.95 | 237,939 |
| Vatican City Country Quiz | 0 | - | 4.53 | 44,558 |
| Most-Visited Countries by Popes | 0 | - | 4.56 | 84,004 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 70,305 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 83,175 |
| Countries Bordering China Since 1914 | 0 | - | 4.92 | 95,685 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 89,693 |
| Random American Countries on a Map | 0 | - | 4.96 | 99,944 |
| South America Flags Map Quiz | 0 | - | 4.95 | 88,595 |
| Most-Spoken Languages of the United States | 0 | - | 4.52 | 221,499 |
| Names of Generations | 0 | - | 4.09 | 45,329 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 118,486 |
| Most Common High School Mascots | 0 | - | 4.47 | 32,238 |
| American Founding Fathers | 0 | - | 4.42 | 23,252 |
| History of Florida | 0 | - | 4.45 | 9,858 |
| The Life of Martin Luther King Jr. | 0 | - | 4.73 | 11,125 |
| Hawaiian Islands | 0 | - | 4.83 | 42,832 |
| Boston Red Sox Trivia | 0 | - | 4.09 | 7,565 |
| New York Yankees Trivia | 0 | - | 4.29 | 7,245 |
| History of Texas | 0 | - | 4.43 | 14,670 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,446 |
| American History Quotes #1 | 0 | - | 4.37 | 96,138 |
| People on Money - United States | 0 | - | 4.31 | 63,398 |
| American History Quotes #2 | 0 | - | 4.38 | 41,468 |
| Old West History | 0 | - | 4.34 | 15,292 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,545 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,160 |
| Life of Benjamin Franklin | 0 | - | 4.24 | 6,529 |
| American Revolution - Multiple Choice | 0 | - | 4.34 | 19,967 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,764 |
