| U.S. Presidents Quiz | 0 | - | 5.00 | 3,404,551 |
| Name a Valid U.S. President #1 | 0 | - | 4.91 | 178,570 |
| U.S. Presidential Trivia #1 | 0 | - | 4.52 | 102,692 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.56 | 87,744 |
| U.S. Presidential Trivia #2 | 0 | - | 4.48 | 48,446 |
| Assassinated U.S. Presidents | 0 | - | 4.61 | 86,246 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 35,399 |
| U.S. Presidents Who Died in Office | 0 | - | 4.78 | 32,857 |
| Name a Valid U.S. President #2 | 0 | - | 4.53 | 65,551 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 367,609 |
| U.S. Vice Presidents | 0 | - | 4.39 | 127,730 |
| Governors Who Ran For President | 0 | - | 4.47 | 19,459 |
| U.S. Presidents by Event | 0 | - | 4.57 | 30,564 |
| First Ladies of the United States | 0 | - | 4.27 | 82,449 |
| Presidential Middle Names | 0 | - | 4.37 | 57,792 |
| The Abraham Lincoln Presidency | 0 | - | 4.51 | 25,469 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.30 | 71,674 |
| Random U.S. Vice President to President | 0 | - | 4.48 | 29,352 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.63 | 14,972 |
| Add a Letter - Make a U.S. President | 0 | - | 4.61 | 22,984 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.42 | 23,168 |
| U.S. Presidents by Picture | 0 | - | 4.85 | 409,040 |
| People in Pictures with Barack Obama | 0 | - | 4.11 | 46,438 |
| U.S. Presidents by Picture - Multiple Choice | 0 | - | 4.52 | 27,011 |
| U.S. Presidential Running Mates | 0 | - | 4.39 | 27,275 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,251 |
| The John Adams Presidency | 0 | - | 4.12 | 8,315 |
| The Theodore Roosevelt Presidency | 0 | - | 4.33 | 7,402 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,164 |
| Play-Doh Presidents | 0 | - | 5.00 | 78,423 |
| The George Washington Presidency | 0 | - | 4.03 | 14,062 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,465 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 17,499 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,089 |
| Vietnam War Countries | 0 | - | 4.81 | 89,678 |
| George Washington... or George W. Bush? | 0 | - | 4.16 | 11,793 |
| US Presidents - 1 Minute Sprint | 0 | - | 4.40 | 291,931 |
| U.S. President Scramble | 0 | - | 4.39 | 111,411 |
| U.S. Senators by State | 0 | - | 4.49 | 38,181 |
| U.S. Presidents True or False | 0 | - | 3.94 | 15,077 |
| The Kennedy Family | 0 | - | 3.84 | 13,658 |
| U.S. Presidential Quotes | 0 | - | 4.36 | 43,592 |
| The John F. Kennedy Presidency | 0 | - | 4.47 | 42,238 |
| Deadliest U.S. Wars | 0 | - | 4.84 | 165,569 |
| Confederate States of the U.S. Civil War | 0 | - | 4.90 | 125,406 |
| Mississippi River States Empty Map Quiz | 0 | - | 4.85 | 53,358 |
| Win the U.S. Presidential Election | 0 | - | 4.74 | 564,169 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.71 | 19,614 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.47 | 22,048 |
| The American Revolution | 0 | - | 4.52 | 52,918 |
| United States Map Quiz | 0 | - | 4.98 | 4,033,985 |
| The George W. Bush Presidency | 0 | - | 4.06 | 31,482 |
| People in Pictures with Ronald Reagan | 0 | - | 4.33 | 39,145 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.17 | 31,904 |
| The Barack Obama Presidency | 0 | - | 4.17 | 24,446 |
| Harvard University | 0 | - | 4.15 | 8,037 |
| Third Most Common Language by U.S. State | 0 | - | 4.90 | 110,544 |
| Rust Belt Cities Map Quiz | 0 | - | 4.56 | 33,601 |
| Top 10 U.S. States by Republican Party Support | 0 | - | 4.44 | 72,352 |
| Top 10 U.S. States by Democratic Party Support | 0 | - | 4.63 | 77,499 |
| Presidential Actors | 0 | - | 4.34 | 18,489 |
| Random U.S. Presidents by Picture | 0 | - | 4.37 | 63,067 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.94 | 58,562 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 82,277 |
| Countries of the Soviet Union | 0 | - | 4.98 | 189,287 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 103,014 |
| The Iraq War | 0 | - | 4.46 | 14,945 |
| U.S. State Border Crossings | 0 | - | 4.96 | 85,673 |
| U.S. Citizenship Test Questions | 0 | - | 4.84 | 229,967 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.86 | 69,786 |
| Top 10 U.S. Swing States in the 2024 Election | 0 | - | 4.51 | 72,716 |
| The Bill Clinton Presidency | 0 | - | 4.19 | 30,755 |
| The George H. W. Bush Presidency | 0 | - | 4.34 | 20,984 |
| The Ronald Reagan Presidency | 0 | - | 4.25 | 24,168 |
| The Richard Nixon Presidency | 0 | - | 4.05 | 21,393 |
| The Jimmy Carter Presidency | 0 | - | 4.39 | 18,524 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 67,555 |
| US States Quiz | 0 | - | 5.00 | 15,693,930 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.97 | 353,877 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 141,357 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 69,158 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.94 | 56,318 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 64,544 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 51,234 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 77,289 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 135,067 |
| All Modern-Day Countries Ever Controlled by Chinese People | 0 | - | 4.84 | 51,153 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 99,607 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 77,721 |
| Total United States Immigration by Country | 0 | - | 4.88 | 103,238 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.95 | 164,939 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.94 | 200,122 |
| Pixelated United States Map | 0 | - | 4.90 | 87,423 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 100,709 |
| Countries that Visit the United States the Most | 0 | - | 4.95 | 84,669 |
| All U.S. Supreme Court Justices | 0 | - | 4.49 | 28,000 |
| U.S. Cabinet Departments | 0 | - | 4.85 | 70,090 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.41 | 11,075 |
| George Bush... or George Bush | 0 | - | 3.92 | 7,937 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.83 | 61,233 |
| Las Vegas Casinos Quiz | 0 | - | 4.08 | 37,345 |
| Six Flags Over Texas | 0 | - | 4.80 | 60,889 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.88 | 24,765 |
| American History Quotes #1 | 0 | - | 4.41 | 93,498 |
| U.S. History for Dummies | 0 | - | 4.49 | 78,978 |
| The Most Recent... United States | 0 | - | 4.47 | 17,063 |
| U.S. Civil War Decoder | 0 | - | 4.18 | 24,635 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 108,709 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 103,566 |
| 10 Southernmost U.S. States | 0 | - | 4.87 | 105,818 |
| U.S. States with Short Names | 0 | - | 4.89 | 139,124 |
| U.S. States that Start with M | 0 | - | 4.92 | 176,910 |
| U.S. States By Population | 0 | - | 4.90 | 136,174 |
| U.S. States that Start with N | 0 | - | 4.94 | 163,173 |
| U.S. States with Longest Names | 0 | - | 4.87 | 39,957 |
| 10 Northernmost U.S. States | 0 | - | 4.89 | 78,285 |
| U.S. States with a Unique First Letter | 0 | - | 4.95 | 82,800 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 61,021 |
| The Only Remaining U.S. State . . . | 0 | - | 4.94 | 60,339 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.94 | 152,692 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 172,840 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 119,004 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.83 | 66,373 |
| Top 10 Newest U.S. States | 0 | - | 4.83 | 82,475 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.82 | 61,751 |
| All Modern-Day Countries Ever Controlled by Greeks | 0 | - | 4.97 | 49,388 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 55,736 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 100,601 |
| Countries of Iberia in History with a Map | 0 | - | 4.86 | 37,668 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.96 | 80,773 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 108,414 |
| Countries in the Ottoman Empire | 0 | - | 4.88 | 69,615 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 83,343 |
| 10 Longest Rivers in the United States | 0 | - | 4.84 | 36,818 |
| Rivers of the United States | 0 | - | 4.92 | 61,117 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.96 | 302,622 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 139,253 |
| Countries that Beat the United States | 0 | - | 4.92 | 156,432 |
| American Revolution Decoder | 0 | - | 4.10 | 20,415 |
| Countries Closest to Alaska | 0 | - | 4.91 | 104,165 |
| California A-Z | 0 | - | 4.48 | 28,287 |
| Top 10 Los Angeles Lakers of All-Time | 0 | - | 4.23 | 44,161 |
| Countries Closest to Maine | 0 | - | 4.85 | 62,464 |
| Embarrassing Chapters in US History | 0 | - | 4.19 | 32,275 |
| The American Civil War | 0 | - | 4.61 | 50,499 |
| Word Scramble - U.S. States | 0 | - | 4.96 | 478,366 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 41,241 |
| US States with an Empty Map | 0 | - | 5.00 | 586,771 |
| Name a Valid U.S. State #1 | 0 | - | 4.95 | 195,502 |
| Great Plains States and Provinces on a Map | 0 | - | 4.94 | 43,129 |
| Draw All US State Borders | 0 | - | 4.99 | 112,814 |
| Top 10 Coldest U.S. States | 0 | - | 4.92 | 106,701 |
| Top 10 Hottest U.S. States | 0 | - | 4.85 | 117,067 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 77,083 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 95,487 |
| U.S. States with the Most Immigrants | 0 | - | 4.84 | 77,812 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.83 | 59,095 |
| Merged U.S. States | 0 | - | 4.39 | 42,151 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 86,423 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 123,005 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 158,752 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.97 | 95,876 |
| All Modern-Day Countries Ever Controlled by French People | 0 | - | 4.99 | 54,480 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 94,145 |
| Ultimate Harry Potter Name Game | 0 | - | 4.95 | 476,385 |
| Commonwealth of Nations Countries | 0 | - | 4.93 | 229,465 |
| Vatican City Country Quiz | 0 | - | 4.51 | 41,750 |
| Most-Visited Countries by Popes | 0 | - | 4.55 | 79,998 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 65,075 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 76,915 |
| Countries Bordering China Since 1914 | 0 | - | 4.92 | 91,275 |
| Colonies of Africa with a Map | 0 | - | 4.78 | 51,057 |
| Random American Countries on a Map | 0 | - | 4.96 | 91,870 |
| South America Flags Map Quiz | 0 | - | 4.95 | 78,496 |
| Most-Spoken Languages of the United States | 0 | - | 4.45 | 180,353 |
| Countries Closest to United States A-Z | 0 | - | 4.83 | 112,390 |
| History of Florida | 0 | - | 4.45 | 9,324 |
| The Life of Martin Luther King Jr. | 0 | - | 4.79 | 10,704 |
| Hawaiian Islands | 0 | - | 4.83 | 40,347 |
| New York Yankees Trivia | 0 | - | 4.29 | 6,709 |
| History of Texas | 0 | - | 4.43 | 14,069 |
| People on Money - United States | 0 | - | 4.32 | 62,525 |
| American History Quotes #2 | 0 | - | 4.37 | 40,217 |
| Old West History | 0 | - | 4.30 | 15,002 |
| U.S. History Groups of Two | 0 | - | 4.22 | 43,093 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.19 | 42,886 |
| Life of Benjamin Franklin | 0 | - | 4.20 | 6,366 |
| American Revolution - Multiple Choice | 0 | - | 4.34 | 19,369 |
| Last Names in U.S. History #1 | 0 | - | 4.24 | 35,216 |
| Fifty US States in One Minute | 0 | - | 4.53 | 3,404,209 |
| U.S. State Flags | 0 | - | 4.88 | 150,858 |
| U.S. States that Border Canada | 0 | - | 4.91 | 171,429 |
| Category Elimination - U.S. States #1 | 0 | - | 4.91 | 206,365 |
| U.S. State Birds Quiz | 0 | - | 4.36 | 20,926 |
| U.S. States that Start with M - Shape Quiz | 0 | - | 4.93 | 54,611 |
| Neutral European Countries of WWII | 0 | - | 4.92 | 154,533 |
| Countries of the German Empire | 0 | - | 4.51 | 35,816 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 65,387 |
| Biggest Roman Empire Countries | 0 | - | 4.88 | 98,241 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 415,730 |
