| U.S. Presidents Quiz | 0 | - | 5.00 | 3,715,115 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 193,104 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 109,089 |
| U.S. Presidents by Event | 0 | - | 4.58 | 34,960 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 94,326 |
| Presidential Middle Names | 0 | - | 4.41 | 60,543 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,536 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,757 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,552 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 35,117 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 70,371 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 382,889 |
| U.S. Presidents Who Added the Most Territory | 0 | - | 4.66 | 14,180 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,687 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,315 |
| First Ladies of the United States | 0 | - | 4.28 | 85,818 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,269 |
| U.S. Presidents in Order by First Letter | 0 | - | 4.32 | 77,329 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,287 |
| Add a Letter - Make a U.S. President | 0 | - | 4.58 | 24,049 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,895 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 24,016 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 427,689 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 48,010 |
| U.S. Presidents by Picture - Multiple Choice | 0 | - | 4.50 | 28,952 |
| U.S. Presidential Running Mates | 0 | - | 4.41 | 28,701 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,760 |
| 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 | 82,667 |
| 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 | 18,345 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,731 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 305,792 |
| Vietnam War Countries | 0 | - | 4.82 | 94,460 |
| George Washington... or George W. Bush? | 0 | - | 4.16 | 12,284 |
| U.S. President Scramble | 0 | - | 4.40 | 117,270 |
| U.S. Presidents True or False | 0 | - | 3.96 | 15,626 |
| The Kennedy Family | 0 | - | 3.90 | 14,087 |
| U.S. Senators by State | 0 | - | 4.44 | 40,036 |
| U.S. History Timeline Quiz | 0 | - | 4.96 | 57,076 |
| Presidents that Beat Thomas Jefferson | 0 | - | 4.49 | 25,032 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,569 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,241 |
| The John F. Kennedy Presidency | 0 | - | 4.47 | 43,862 |
| The American Revolution | 0 | - | 4.52 | 54,312 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,455 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 129,483 |
| Mississippi River States Empty Map Quiz | 0 | - | 4.83 | 56,129 |
| Win the U.S. Presidential Election | 0 | - | 4.78 | 631,792 |
| The Jimmy Carter Presidency | 0 | - | 4.41 | 19,187 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 20,128 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,855 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,281 |
| United States Map Quiz | 0 | - | 4.98 | 4,166,166 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,729 |
| Random U.S. Presidents by Picture | 0 | - | 4.40 | 66,451 |
| The Barack Obama Presidency | 0 | - | 4.13 | 25,456 |
| Harvard University | 0 | - | 4.15 | 8,315 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 89,401 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,758 |
| The Iraq War | 0 | - | 4.47 | 15,686 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,886 |
| Rust Belt Cities Map Quiz | 0 | - | 4.57 | 35,204 |
| Top 10 U.S. States by Republican Party Support | 0 | - | 4.44 | 75,684 |
| Top 10 U.S. States by Democratic Party Support | 0 | - | 4.63 | 81,534 |
| Top 10 U.S. Swing States in the 2024 Election | 0 | - | 4.51 | 75,342 |
| Presidential Actors | 0 | - | 4.36 | 19,215 |
| The Bill Clinton Presidency | 0 | - | 4.24 | 31,503 |
| The George H. W. Bush Presidency | 0 | - | 4.36 | 21,532 |
| The Ronald Reagan Presidency | 0 | - | 4.26 | 24,864 |
| The Richard Nixon Presidency | 0 | - | 4.05 | 22,068 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 69,935 |
| U.S. States Closest to Moscow | 0 | - | 4.50 | 48,178 |
| Countries of the Soviet Union | 0 | - | 4.98 | 195,302 |
| Soviet Union Country Quiz | 0 | - | 4.91 | 80,967 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,714 |
| Name the U.S. National Parks | 0 | - | 4.86 | 60,253 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,493 |
| Total United States Immigration by Country | 0 | - | 4.91 | 112,045 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,742 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 175,135 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 245,433 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 73,001 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 74,652 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,532 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 40,130 |
| US States Quiz | 0 | - | 5.00 | 16,946,034 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 368,067 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,966 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 84,278 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,353 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,508 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,291 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 145,208 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 116,471 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,284 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,243 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,296 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 334,038 |
| Pixelated United States Map | 0 | - | 4.88 | 94,597 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 110,146 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 92,149 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 146,877 |
| Countries that Beat the United States | 0 | - | 4.93 | 168,139 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,125 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,843 |
| George Bush... or George Bush | 0 | - | 3.98 | 8,225 |
| American Revolution Decoder | 0 | - | 4.10 | 20,976 |
| California A-Z | 0 | - | 4.49 | 28,820 |
| Las Vegas Casinos | 0 | - | 4.13 | 38,106 |
| Six Flags Over Texas | 0 | - | 4.78 | 63,514 |
| U.S. History for Dummies | 0 | - | 4.47 | 83,276 |
| The Most Recent... United States | 0 | - | 4.46 | 18,528 |
| The American Civil War | 0 | - | 4.62 | 52,549 |
| U.S. Civil War Decoder | 0 | - | 4.14 | 25,315 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 118,671 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 508,650 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 111,897 |
| 10 Southernmost U.S. States | 0 | - | 4.89 | 113,903 |
| U.S. States with Short Names | 0 | - | 4.91 | 149,523 |
| U.S. States that Start with M | 0 | - | 4.93 | 187,877 |
| U.S. States By Population | 0 | - | 4.92 | 153,884 |
| U.S. States that Start with N | 0 | - | 4.95 | 171,875 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,694 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 48,999 |
| US States with an Empty Map | 0 | - | 5.00 | 626,916 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 82,883 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,643 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,404 |
| Most Common Immigrant Origin by U.S. State | 0 | - | 4.90 | 67,490 |
| Draw All US State Borders | 0 | - | 4.99 | 139,414 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 65,901 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 160,418 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 178,027 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 125,505 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,726 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 86,510 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 102,082 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,714 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.85 | 67,841 |
| Merged U.S. States | 0 | - | 4.37 | 44,304 |
| Draw All US State Borders - Extreme | 0 | - | 4.99 | 78,937 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 96,626 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 133,755 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 165,847 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 104,298 |
| All Modern-Day Countries Ever Controlled by Greeks | 0 | - | 4.98 | 54,447 |
| Least Irish U.S. States | 0 | - | 4.49 | 18,357 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 61,431 |
| Countries of Iberia in History with a Map | 0 | - | 4.88 | 42,191 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,643 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,863 |
| Commonwealth of Nations Countries | 0 | - | 4.95 | 237,920 |
| Vatican City Country Quiz | 0 | - | 4.53 | 44,550 |
| Most-Visited Countries by Popes | 0 | - | 4.56 | 83,992 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 70,282 |
| The Persian Gulf War | 0 | - | 4.02 | 8,471 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,906 |
| Countries Bordering China Since 1914 | 0 | - | 4.92 | 95,673 |
| All Modern-Day Countries Ever Controlled by Chinese People | 0 | - | 4.82 | 55,036 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 89,674 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 81,521 |
| South America Flags Map Quiz | 0 | - | 4.95 | 88,547 |
| Rivers of the United States | 0 | - | 4.93 | 66,453 |
| Names of Generations | 0 | - | 4.09 | 45,319 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 118,476 |
| American Founding Fathers | 0 | - | 4.42 | 23,251 |
| Countries Closest to Alaska | 0 | - | 4.93 | 124,803 |
| Top 10 Los Angeles Lakers of All-Time | 0 | - | 4.24 | 47,085 |
| History of Florida | 0 | - | 4.45 | 9,857 |
| Hawaiian Islands | 0 | - | 4.83 | 42,831 |
| Countries Closest to Maine | 0 | - | 4.85 | 67,395 |
| 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 | 65,442 |
| American History Quotes #1 | 0 | - | 4.37 | 96,136 |
| People on Money - United States | 0 | - | 4.31 | 63,395 |
| American History Quotes #2 | 0 | - | 4.38 | 41,468 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,544 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,157 |
| Events in U.S. History | 0 | - | 4.41 | 28,763 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,155 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,763 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,299 |
| U.S. State Flags | 0 | - | 4.89 | 171,880 |
| U.S. States that Border Canada | 0 | - | 4.91 | 185,968 |
| U.S. States by Church Attendance | 0 | - | 4.59 | 32,514 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 209,797 |
| Great Plains States and Provinces on a Map | 0 | - | 4.95 | 49,845 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 125,476 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 126,141 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 92,524 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 62,077 |
| U.S. States that Start with M - Shape Quiz | 0 | - | 4.94 | 58,315 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 161,955 |
| All Modern-Day Countries Ever Controlled by French People | 0 | - | 4.99 | 58,329 |
