| U.S. Presidents Quiz | 0 | - | 5.00 | 3,732,570 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 194,091 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 109,693 |
| U.S. Presidents by Event | 0 | - | 4.58 | 35,494 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.62 | 94,792 |
| Presidential Middle Names | 0 | - | 4.42 | 60,823 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,758 |
| Assassinated U.S. Presidents | 0 | - | 4.62 | 94,952 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,666 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 35,262 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 70,680 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 383,982 |
| U.S. Vice Presidents | 0 | - | 4.39 | 137,217 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,385 |
| U.S. Presidential Running Mates | 0 | - | 4.41 | 28,806 |
| First Ladies of the United States | 0 | - | 4.28 | 86,038 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,339 |
| U.S. Presidents in Order by First Letter | 0 | - | 4.32 | 77,546 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,392 |
| Add a Letter - Make a U.S. President | 0 | - | 4.58 | 24,126 |
| Win the 1828 U.S. Presidential Election | 0 | - | 4.32 | 59,700 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,965 |
| U.S. Presidents Who Added the Most Territory | 0 | - | 4.67 | 14,265 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 428,972 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 48,122 |
| U.S. Presidents by Picture - Multiple Choice | 0 | - | 4.50 | 29,090 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,790 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,783 |
| The John Adams Presidency | 0 | - | 4.12 | 8,799 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,788 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,945 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,985 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.38 | 24,094 |
| The George Washington Presidency | 0 | - | 4.03 | 14,622 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 17,004 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,398 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,778 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 306,470 |
| Vietnam War Countries | 0 | - | 4.82 | 94,779 |
| George Washington... or George W. Bush? | 0 | - | 4.16 | 12,312 |
| U.S. President Scramble | 0 | - | 4.40 | 117,585 |
| U.S. Presidents True or False | 0 | - | 3.96 | 15,661 |
| The Kennedy Family | 0 | - | 3.90 | 14,111 |
| U.S. Senators by State | 0 | - | 4.44 | 40,151 |
| Presidents that Beat Thomas Jefferson | 0 | - | 4.47 | 25,115 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,625 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,299 |
| The John F. Kennedy Presidency | 0 | - | 4.47 | 43,972 |
| The American Revolution | 0 | - | 4.52 | 54,395 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 192,068 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 129,752 |
| Mississippi River States Empty Map Quiz | 0 | - | 4.82 | 56,396 |
| Win the U.S. Presidential Election | 0 | - | 4.79 | 637,660 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 20,156 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,372 |
| United States Map Quiz | 0 | - | 4.98 | 4,174,157 |
| The Jimmy Carter Presidency | 0 | - | 4.41 | 19,249 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,959 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,870 |
| Random U.S. Presidents by Picture | 0 | - | 4.40 | 66,670 |
| The Barack Obama Presidency | 0 | - | 4.14 | 25,534 |
| Harvard University | 0 | - | 4.15 | 8,336 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 89,931 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.89 | 114,595 |
| The Iraq War | 0 | - | 4.47 | 15,721 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 114,046 |
| Rust Belt Cities Map Quiz | 0 | - | 4.57 | 35,326 |
| Top 10 U.S. States by Republican Party Support | 0 | - | 4.44 | 75,886 |
| Top 10 U.S. States by Democratic Party Support | 0 | - | 4.63 | 81,775 |
| Top 10 U.S. Swing States in the 2024 Election | 0 | - | 4.51 | 75,497 |
| Presidential Actors | 0 | - | 4.36 | 19,266 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 70,816 |
| U.S. States Closest to Moscow | 0 | - | 4.50 | 48,296 |
| Countries of the Soviet Union | 0 | - | 4.98 | 195,733 |
| Soviet Union Country Quiz | 0 | - | 4.91 | 81,249 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,982 |
| Name the U.S. National Parks | 0 | - | 4.86 | 60,621 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 241,020 |
| Total United States Immigration by Country | 0 | - | 4.91 | 112,605 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 76,105 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 175,924 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 247,168 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 73,183 |
| The Bill Clinton Presidency | 0 | - | 4.24 | 31,561 |
| The George H. W. Bush Presidency | 0 | - | 4.36 | 21,564 |
| The Ronald Reagan Presidency | 0 | - | 4.26 | 24,911 |
| The Richard Nixon Presidency | 0 | - | 4.05 | 22,112 |
| Cities and Towns of Massachusetts | 0 | - | 4.93 | 75,301 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,850 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 40,350 |
| US States Quiz | 0 | - | 5.00 | 17,029,817 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 368,951 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,621 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 86,202 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 66,072 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.97 | 72,064 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,768 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 146,137 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 117,163 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 119,105 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,748 |
| 10 Longest Rivers in the United States | 0 | - | 4.86 | 39,472 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 336,457 |
| Pixelated United States Map | 0 | - | 4.89 | 95,009 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 110,790 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 92,645 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 147,443 |
| Countries that Beat the United States | 0 | - | 4.93 | 168,982 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,174 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,882 |
| George Bush... or George Bush | 0 | - | 3.98 | 8,243 |
| American Revolution Decoder | 0 | - | 4.12 | 21,004 |
| California A-Z | 0 | - | 4.49 | 28,863 |
| Las Vegas Casinos | 0 | - | 4.13 | 38,166 |
| Six Flags Over Texas | 0 | - | 4.78 | 63,685 |
| U.S. History for Dummies | 0 | - | 4.47 | 83,531 |
| The Most Recent... United States | 0 | - | 4.46 | 18,603 |
| The American Civil War | 0 | - | 4.62 | 52,672 |
| U.S. Civil War Decoder | 0 | - | 4.14 | 25,350 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 119,236 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 511,182 |
| U.S. States with the Letter Y | 0 | - | 4.86 | 112,476 |
| 10 Southernmost U.S. States | 0 | - | 4.89 | 114,493 |
| U.S. States with Short Names | 0 | - | 4.91 | 150,573 |
| U.S. States that Start with M | 0 | - | 4.94 | 188,623 |
| U.S. States By Population | 0 | - | 4.92 | 154,295 |
| U.S. States that Start with N | 0 | - | 4.95 | 172,415 |
| U.S. States with Longest Names | 0 | - | 4.85 | 45,009 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 49,484 |
| US States with an Empty Map | 0 | - | 5.00 | 629,792 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 83,195 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 89,007 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,617 |
| Draw All US State Borders | 0 | - | 4.99 | 141,679 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 66,235 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 161,205 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 178,336 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 125,791 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,887 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 86,739 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 102,605 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 83,132 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.85 | 68,083 |
| Merged U.S. States | 0 | - | 4.37 | 44,464 |
| Draw All US State Borders - Extreme | 0 | - | 4.99 | 79,544 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 97,455 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 134,665 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 166,677 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 105,043 |
| All Modern-Day Countries Ever Controlled by Greeks | 0 | - | 4.97 | 54,805 |
| Least Irish U.S. States | 0 | - | 4.49 | 18,421 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 61,842 |
| Countries of Iberia in History with a Map | 0 | - | 4.88 | 42,552 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 87,060 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 99,227 |
| Commonwealth of Nations Countries | 0 | - | 4.95 | 238,658 |
| Vatican City Country Quiz | 0 | - | 4.53 | 44,728 |
| Most-Visited Countries by Popes | 0 | - | 4.56 | 84,280 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 70,677 |
| The Persian Gulf War | 0 | - | 4.02 | 8,491 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 73,134 |
| Countries Bordering China Since 1914 | 0 | - | 4.93 | 95,964 |
| All Modern-Day Countries Ever Controlled by Chinese People | 0 | - | 4.81 | 55,314 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 90,147 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 81,855 |
| South America Flags Map Quiz | 0 | - | 4.95 | 89,225 |
| Rivers of the United States | 0 | - | 4.93 | 66,823 |
| Names of Generations | 0 | - | 4.09 | 45,621 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 118,860 |
| American Founding Fathers | 0 | - | 4.42 | 23,306 |
| Countries Closest to Alaska | 0 | - | 4.93 | 125,359 |
| Top 10 Los Angeles Lakers of All-Time | 0 | - | 4.24 | 47,267 |
| History of Florida | 0 | - | 4.45 | 9,890 |
| Hawaiian Islands | 0 | - | 4.83 | 43,038 |
| Countries Closest to Maine | 0 | - | 4.85 | 67,726 |
| New York Yankees Trivia | 0 | - | 4.29 | 7,284 |
| History of Texas | 0 | - | 4.43 | 14,705 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,587 |
| American History Quotes #1 | 0 | - | 4.37 | 96,260 |
| People on Money - United States | 0 | - | 4.31 | 63,509 |
| American History Quotes #2 | 0 | - | 4.38 | 41,545 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,640 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.11 | 53,592 |
| Events in U.S. History | 0 | - | 4.41 | 28,867 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,224 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,810 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,376 |
| U.S. State Flags | 0 | - | 4.88 | 173,627 |
| U.S. States that Border Canada | 0 | - | 4.91 | 187,154 |
| U.S. States by Church Attendance | 0 | - | 4.59 | 32,588 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 210,942 |
| Great Plains States and Provinces on a Map | 0 | - | 4.95 | 50,314 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 126,093 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 126,741 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 93,025 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.83 | 62,301 |
| U.S. States that Start with M - Shape Quiz | 0 | - | 4.94 | 58,562 |
| Neutral European Countries of WWII | 0 | - | 4.92 | 162,592 |
| All Modern-Day Countries Ever Controlled by French People | 0 | - | 4.99 | 58,638 |
| Biggest Roman Empire Countries | 0 | - | 4.87 | 102,469 |
