| U.S. Presidents Quiz | 0 | - | 5.00 | 3,390,651 |
| Name a Valid U.S. President #1 | 0 | - | 4.91 | 177,551 |
| U.S. Presidential Trivia #1 | 0 | - | 4.52 | 102,329 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.56 | 86,938 |
| U.S. Presidential Trivia #2 | 0 | - | 4.48 | 48,138 |
| Assassinated U.S. Presidents | 0 | - | 4.62 | 85,674 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 35,185 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 32,712 |
| Name a Valid U.S. President #2 | 0 | - | 4.53 | 65,238 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 366,921 |
| U.S. Vice Presidents | 0 | - | 4.39 | 127,309 |
| Governors Who Ran For President | 0 | - | 4.47 | 19,402 |
| U.S. Presidents by Event | 0 | - | 4.57 | 30,462 |
| First Ladies of the United States | 0 | - | 4.27 | 82,330 |
| Presidential Middle Names | 0 | - | 4.37 | 57,695 |
| The Abraham Lincoln Presidency | 0 | - | 4.51 | 25,414 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.30 | 71,118 |
| Random U.S. Vice President to President | 0 | - | 4.48 | 29,246 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.63 | 14,886 |
| Add a Letter - Make a U.S. President | 0 | - | 4.61 | 22,915 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.42 | 23,099 |
| U.S. Presidents by Picture | 0 | - | 4.85 | 408,243 |
| People in Pictures with Barack Obama | 0 | - | 4.11 | 46,332 |
| U.S. Presidents by Picture - Multiple Choice | 0 | - | 4.52 | 26,878 |
| U.S. Presidential Running Mates | 0 | - | 4.39 | 27,160 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,213 |
| The John Adams Presidency | 0 | - | 4.12 | 8,284 |
| The Theodore Roosevelt Presidency | 0 | - | 4.33 | 7,381 |
| U.S. Vice Presidential Trivia | 0 | - | 4.31 | 12,120 |
| Play-Doh Presidents | 0 | - | 5.00 | 78,213 |
| The George Washington Presidency | 0 | - | 4.03 | 14,021 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,440 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 17,425 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,046 |
| Vietnam War Countries | 0 | - | 4.81 | 89,495 |
| George Washington... or George W. Bush? | 0 | - | 4.16 | 11,743 |
| US Presidents - 1 Minute Sprint | 0 | - | 4.40 | 291,031 |
| U.S. President Scramble | 0 | - | 4.39 | 111,162 |
| U.S. Senators by State | 0 | - | 4.49 | 38,077 |
| U.S. Presidents True or False | 0 | - | 3.94 | 15,019 |
| The Kennedy Family | 0 | - | 3.84 | 13,641 |
| U.S. Presidential Quotes | 0 | - | 4.36 | 43,531 |
| The John F. Kennedy Presidency | 0 | - | 4.47 | 42,155 |
| Deadliest U.S. Wars | 0 | - | 4.83 | 165,192 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 125,262 |
| Mississippi River States Empty Map Quiz | 0 | - | 4.84 | 53,234 |
| Win the U.S. Presidential Election | 0 | - | 4.74 | 560,752 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.71 | 19,589 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.47 | 21,979 |
| The American Revolution | 0 | - | 4.52 | 52,865 |
| United States Map Quiz | 0 | - | 4.98 | 4,027,648 |
| The George W. Bush Presidency | 0 | - | 4.06 | 31,431 |
| People in Pictures with Ronald Reagan | 0 | - | 4.33 | 39,070 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.17 | 31,827 |
| The Barack Obama Presidency | 0 | - | 4.17 | 24,376 |
| Harvard University | 0 | - | 4.15 | 8,023 |
| Third Most Common Language by U.S. State | 0 | - | 4.90 | 110,392 |
| Rust Belt Cities Map Quiz | 0 | - | 4.56 | 33,519 |
| Top 10 U.S. States by Republican Party Support | 0 | - | 4.43 | 72,164 |
| Top 10 U.S. States by Democratic Party Support | 0 | - | 4.63 | 77,265 |
| Presidential Actors | 0 | - | 4.34 | 18,450 |
| Random U.S. Presidents by Picture | 0 | - | 4.37 | 62,903 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.93 | 58,119 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 82,010 |
| Countries of the Soviet Union | 0 | - | 4.98 | 189,110 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 102,944 |
| The Iraq War | 0 | - | 4.46 | 14,919 |
| U.S. State Border Crossings | 0 | - | 4.96 | 85,466 |
| U.S. Citizenship Test Questions | 0 | - | 4.84 | 229,494 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.86 | 69,531 |
| Top 10 U.S. Swing States in the 2024 Election | 0 | - | 4.51 | 72,555 |
| The Bill Clinton Presidency | 0 | - | 4.19 | 30,706 |
| The George H. W. Bush Presidency | 0 | - | 4.34 | 20,947 |
| The Ronald Reagan Presidency | 0 | - | 4.25 | 24,121 |
| The Richard Nixon Presidency | 0 | - | 4.05 | 21,349 |
| The Jimmy Carter Presidency | 0 | - | 4.39 | 18,492 |
| Cities and Towns of Massachusetts | 0 | - | 4.91 | 67,172 |
| US States Quiz | 0 | - | 5.00 | 15,644,831 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.97 | 353,326 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 141,017 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 68,857 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.94 | 55,931 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 64,243 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 50,966 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 77,146 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 134,695 |
| All Modern-Day Countries Ever Controlled by Chinese People | 0 | - | 4.84 | 50,965 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 99,291 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 77,592 |
| Total United States Immigration by Country | 0 | - | 4.88 | 102,996 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.95 | 164,493 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.94 | 199,636 |
| Pixelated United States Map | 0 | - | 4.91 | 87,145 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 100,379 |
| Countries that Visit the United States the Most | 0 | - | 4.95 | 84,414 |
| All U.S. Supreme Court Justices | 0 | - | 4.48 | 27,960 |
| U.S. Cabinet Departments | 0 | - | 4.85 | 69,942 |
| George Bush... or George Bush | 0 | - | 3.92 | 7,917 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.83 | 61,008 |
| Las Vegas Casinos Quiz | 0 | - | 4.07 | 37,301 |
| Six Flags Over Texas | 0 | - | 4.80 | 60,808 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.88 | 24,604 |
| American History Quotes #1 | 0 | - | 4.41 | 93,410 |
| U.S. History for Dummies | 0 | - | 4.49 | 78,800 |
| The Most Recent... United States | 0 | - | 4.50 | 16,987 |
| U.S. Civil War Decoder | 0 | - | 4.18 | 24,604 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 108,318 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 103,224 |
| 10 Southernmost U.S. States | 0 | - | 4.87 | 105,548 |
| U.S. States with Short Names | 0 | - | 4.89 | 138,734 |
| U.S. States that Start with M | 0 | - | 4.92 | 176,484 |
| U.S. States By Population | 0 | - | 4.90 | 135,918 |
| U.S. States that Start with N | 0 | - | 4.94 | 162,841 |
| U.S. States with Longest Names | 0 | - | 4.87 | 39,752 |
| 10 Northernmost U.S. States | 0 | - | 4.89 | 78,107 |
| U.S. States with a Unique First Letter | 0 | - | 4.95 | 82,558 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 60,896 |
| The Only Remaining U.S. State . . . | 0 | - | 4.94 | 60,143 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.94 | 152,346 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 172,624 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.85 | 118,484 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.83 | 66,195 |
| Top 10 Newest U.S. States | 0 | - | 4.83 | 82,262 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.82 | 61,164 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 55,535 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 100,226 |
| Countries of Iberia in History with a Map | 0 | - | 4.86 | 37,483 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.96 | 80,543 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 108,073 |
| Countries in the Ottoman Empire | 0 | - | 4.88 | 69,539 |
| Countries Bordering China Since 1914 | 0 | - | 4.92 | 91,132 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 83,117 |
| 10 Longest Rivers in the United States | 0 | - | 4.83 | 36,697 |
| Rivers of the United States | 0 | - | 4.92 | 60,906 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.96 | 300,514 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 139,042 |
| Countries that Beat the United States | 0 | - | 4.92 | 156,008 |
| American Revolution Decoder | 0 | - | 4.10 | 20,389 |
| Countries Closest to Alaska | 0 | - | 4.91 | 103,899 |
| California A-Z | 0 | - | 4.48 | 28,278 |
| Top 10 Los Angeles Lakers of All-Time | 0 | - | 4.23 | 44,073 |
| Countries Closest to Maine | 0 | - | 4.85 | 62,284 |
| Embarrassing Chapters in US History | 0 | - | 4.19 | 32,234 |
| The American Civil War | 0 | - | 4.61 | 50,434 |
| Word Scramble - U.S. States | 0 | - | 4.96 | 477,534 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 40,905 |
| US States with an Empty Map | 0 | - | 5.00 | 585,162 |
| Name a Valid U.S. State #1 | 0 | - | 4.95 | 194,989 |
| Great Plains States and Provinces on a Map | 0 | - | 4.94 | 42,829 |
| Draw All US State Borders | 0 | - | 4.99 | 111,657 |
| Top 10 Coldest U.S. States | 0 | - | 4.92 | 106,301 |
| Top 10 Hottest U.S. States | 0 | - | 4.85 | 116,656 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 76,712 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 95,271 |
| U.S. States with the Most Immigrants | 0 | - | 4.84 | 77,658 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.84 | 58,919 |
| Merged U.S. States | 0 | - | 4.39 | 42,061 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 86,039 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 122,515 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 158,521 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.97 | 95,543 |
| All Modern-Day Countries Ever Controlled by French People | 0 | - | 4.99 | 54,289 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 93,983 |
| Ultimate Harry Potter Name Game | 0 | - | 4.95 | 475,842 |
| Commonwealth of Nations Countries | 0 | - | 4.93 | 229,121 |
| Vatican City Country Quiz | 0 | - | 4.51 | 41,638 |
| Most-Visited Countries by Popes | 0 | - | 4.55 | 79,849 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 64,883 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 76,691 |
| Colonies of Africa with a Map | 0 | - | 4.78 | 50,939 |
| Random American Countries on a Map | 0 | - | 4.96 | 91,367 |
| South America Flags Map Quiz | 0 | - | 4.95 | 78,128 |
| Most-Spoken Languages of the United States | 0 | - | 4.44 | 179,128 |
| Countries Closest to United States A-Z | 0 | - | 4.84 | 112,206 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.40 | 11,054 |
| History of Florida | 0 | - | 4.45 | 9,306 |
| The Life of Martin Luther King Jr. | 0 | - | 4.79 | 10,679 |
| Hawaiian Islands | 0 | - | 4.84 | 40,243 |
| New York Yankees Trivia | 0 | - | 4.29 | 6,685 |
| History of Texas | 0 | - | 4.43 | 14,040 |
| People on Money - United States | 0 | - | 4.32 | 62,480 |
| American History Quotes #2 | 0 | - | 4.37 | 40,174 |
| Old West History | 0 | - | 4.30 | 14,989 |
| U.S. History Groups of Two | 0 | - | 4.22 | 43,036 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.19 | 42,822 |
| Life of Benjamin Franklin | 0 | - | 4.20 | 6,360 |
| American Revolution - Multiple Choice | 0 | - | 4.34 | 19,338 |
| Last Names in U.S. History #1 | 0 | - | 4.24 | 35,176 |
| Fifty US States in One Minute | 0 | - | 4.53 | 3,397,319 |
| U.S. State Flags | 0 | - | 4.88 | 150,125 |
| U.S. States that Border Canada | 0 | - | 4.91 | 171,117 |
| Category Elimination - U.S. States #1 | 0 | - | 4.92 | 205,413 |
| U.S. State Birds Quiz | 0 | - | 4.36 | 20,910 |
| U.S. States that Start with M - Shape Quiz | 0 | - | 4.93 | 54,452 |
| Neutral European Countries of WWII | 0 | - | 4.92 | 154,243 |
| Countries of the German Empire | 0 | - | 4.51 | 35,727 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 64,937 |
| Biggest Roman Empire Countries | 0 | - | 4.88 | 98,113 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 414,949 |
| Tolkien's Middle Earth Map Quiz | 0 | - | 4.91 | 33,812 |
