| U.S. Presidents Quiz | 0 | - | 5.00 | 3,203,591 |
| Name a Valid U.S. President #1 | 0 | - | 4.93 | 169,040 |
| U.S. Vice Presidents | 0 | - | 4.41 | 120,993 |
| U.S. Presidential Trivia #1 | 0 | - | 4.51 | 97,840 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.57 | 82,530 |
| U.S. Presidential Trivia #2 | 0 | - | 4.52 | 40,225 |
| Assassinated U.S. Presidents | 0 | - | 4.54 | 80,624 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 33,685 |
| Name a Valid U.S. President #2 | 0 | - | 4.52 | 61,895 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 355,395 |
| Governors Who Ran For President | 0 | - | 4.47 | 18,956 |
| U.S. Presidents by Event | 0 | - | 4.58 | 29,293 |
| U.S. Presidential Running Mates | 0 | - | 4.41 | 25,981 |
| First Ladies of the United States | 0 | - | 4.27 | 80,349 |
| Presidential Middle Names | 0 | - | 4.37 | 56,371 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 24,931 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 65,575 |
| Random U.S. Vice President to President | 0 | - | 4.55 | 27,948 |
| Add a Letter - Make a U.S. President | 0 | - | 4.66 | 22,133 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.41 | 22,604 |
| U.S. Presidents Who Died in Office | 0 | - | 4.75 | 31,396 |
| U.S. Presidents by Picture | 0 | - | 4.85 | 396,886 |
| People in Pictures with Barack Obama | 0 | - | 4.11 | 45,273 |
| U.S. Presidents by Picture - Multiple Choice | 0 | - | 4.51 | 25,633 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 12,923 |
| The John Adams Presidency | 0 | - | 4.10 | 8,022 |
| The Theodore Roosevelt Presidency | 0 | - | 4.33 | 7,169 |
| U.S. Vice Presidential Trivia | 0 | - | 4.31 | 11,552 |
| Play-Doh Presidents | 0 | - | 5.00 | 75,772 |
| The George Washington Presidency | 0 | - | 4.02 | 13,691 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.34 | 10,728 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.32 | 16,896 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.32 | 20,593 |
| Vietnam War Countries | 0 | - | 4.81 | 86,846 |
| US Presidents - 1 Minute Sprint | 0 | - | 4.41 | 281,359 |
| George Washington... or George W. Bush? | 0 | - | 4.14 | 11,421 |
| U.S. President Scramble | 0 | - | 4.37 | 91,776 |
| U.S. Senators by State | 0 | - | 4.49 | 36,425 |
| U.S. Presidents True or False | 0 | - | 3.94 | 14,646 |
| The Kennedy Family | 0 | - | 3.84 | 13,347 |
| U.S. Presidential Quotes | 0 | - | 4.36 | 42,835 |
| The John F. Kennedy Presidency | 0 | - | 4.45 | 41,154 |
| Deadliest U.S. Wars | 0 | - | 4.83 | 159,253 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 122,975 |
| Mississippi River States Empty Map Quiz | 0 | - | 4.84 | 51,341 |
| Win the U.S. Presidential Election | 0 | - | 4.79 | 517,439 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.73 | 19,309 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.46 | 21,036 |
| The American Revolution | 0 | - | 4.51 | 51,910 |
| Six Flags Over Texas | 0 | - | 4.84 | 59,153 |
| United States Map Quiz | 0 | - | 4.98 | 3,922,417 |
| The George W. Bush Presidency | 0 | - | 4.06 | 30,999 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 37,742 |
| The Barack Obama Presidency | 0 | - | 4.17 | 23,724 |
| Harvard University | 0 | - | 4.15 | 7,765 |
| The Iraq War | 0 | - | 4.45 | 14,457 |
| Third Most Common Language by U.S. State | 0 | - | 4.90 | 107,860 |
| Rust Belt Cities Map Quiz | 0 | - | 4.56 | 32,465 |
| Top 10 U.S. States by Republican Party Support | 0 | - | 4.43 | 69,621 |
| Top 10 U.S. States by Democratic Party Support | 0 | - | 4.69 | 74,393 |
| Presidential Actors | 0 | - | 4.33 | 17,904 |
| Random U.S. Presidents by Picture | 0 | - | 4.37 | 60,561 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.92 | 50,921 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 77,765 |
| Countries of the Soviet Union | 0 | - | 4.98 | 185,683 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.91 | 100,339 |
| U.S. State Border Crossings | 0 | - | 4.96 | 82,681 |
| U.S. Citizenship Test Questions | 0 | - | 4.86 | 223,281 |
| Five Biggest Immigrant Groups by Decade in the US | 0 | - | 4.84 | 34,226 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 65,988 |
| Top 10 U.S. Swing States in the 2024 Election | 0 | - | 4.52 | 70,500 |
| The Bill Clinton Presidency | 0 | - | 4.18 | 30,266 |
| The George H. W. Bush Presidency | 0 | - | 4.35 | 20,614 |
| The Ronald Reagan Presidency | 0 | - | 4.25 | 23,710 |
| The Richard Nixon Presidency | 0 | - | 4.10 | 20,914 |
| The Jimmy Carter Presidency | 0 | - | 4.39 | 18,132 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.20 | 30,424 |
| Cities and Towns of Massachusetts | 0 | - | 4.90 | 61,506 |
| US States Quiz | 0 | - | 5.00 | 14,898,205 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.97 | 342,008 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 135,070 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 63,917 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.93 | 50,452 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.97 | 59,694 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 47,139 |
| Soviet Union Country Quiz | 0 | - | 4.91 | 74,983 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 128,178 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.89 | 51,781 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 94,671 |
| Countries of Iberia in History with a Map | 0 | - | 4.82 | 34,639 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.96 | 76,568 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 101,501 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.84 | 55,419 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 67,550 |
| All Modern-Day Countries Ever Controlled by Chinese People | 0 | - | 4.85 | 48,499 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 94,619 |
| Biggest Mongol Empire Countries | 0 | - | 4.91 | 67,882 |
| Total United States Immigration by Country | 0 | - | 4.89 | 97,530 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.93 | 148,390 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.94 | 187,402 |
| Pixelated United States Map | 0 | - | 4.90 | 83,031 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 94,508 |
| Countries that Visit the United States the Most | 0 | - | 4.95 | 79,659 |
| All U.S. Supreme Court Justices | 0 | - | 4.49 | 27,397 |
| U.S. Cabinet Departments | 0 | - | 4.85 | 67,940 |
| George Bush... or George Bush | 0 | - | 3.89 | 7,740 |
| Las Vegas Casinos Quiz | 0 | - | 4.07 | 36,549 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.85 | 22,168 |
| U.S. History for Dummies | 0 | - | 4.50 | 65,941 |
| U.S. Civil War Decoder | 0 | - | 4.17 | 24,178 |
| The 13 Colonies Quiz | 0 | - | 4.96 | 101,367 |
| U.S. States with the Letter Y | 0 | - | 4.86 | 97,173 |
| 10 Southernmost U.S. States | 0 | - | 4.85 | 100,239 |
| U.S. States with Short Names | 0 | - | 4.87 | 131,290 |
| U.S. States that Start with M | 0 | - | 4.91 | 151,849 |
| U.S. States By Population | 0 | - | 4.90 | 130,960 |
| U.S. States that Start with N | 0 | - | 4.95 | 156,458 |
| U.S. States with Longest Names | 0 | - | 4.85 | 36,503 |
| 10 Northernmost U.S. States | 0 | - | 4.89 | 74,453 |
| U.S. States with a Unique First Letter | 0 | - | 4.95 | 78,513 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 58,756 |
| The Only Remaining U.S. State . . . | 0 | - | 4.94 | 56,695 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 146,342 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 168,470 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.85 | 99,552 |
| Top 10 Least Obese U.S. States | 0 | - | 4.81 | 68,980 |
| The United States... or the United Kingdom? | 0 | - | 4.89 | 90,936 |
| Ultimate Harry Potter Name Game | 0 | - | 4.95 | 465,912 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 223,494 |
| Vatican City Country Quiz | 0 | - | 4.50 | 39,719 |
| Most-Visited Countries by Popes | 0 | - | 4.63 | 77,099 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 61,357 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 72,523 |
| Countries Bordering China Since 1914 | 0 | - | 4.92 | 88,317 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 78,790 |
| 10 Longest Rivers in the United States | 0 | - | 4.82 | 35,272 |
| Rivers of the United States | 0 | - | 4.92 | 57,627 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.96 | 278,781 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 125,578 |
| Countries that Beat the United States | 0 | - | 4.92 | 147,188 |
| American Revolution Decoder | 0 | - | 4.12 | 20,066 |
| Countries Closest to Alaska | 0 | - | 4.92 | 99,917 |
| California A-Z | 0 | - | 4.48 | 27,883 |
| Top 10 Los Angeles Lakers of All-Time | 0 | - | 4.32 | 42,379 |
| Countries Closest to Maine | 0 | - | 4.85 | 59,564 |
| The American Civil War | 0 | - | 4.63 | 49,323 |
| Word Scramble - U.S. States | 0 | - | 4.96 | 462,253 |
| Louisiana Purchase with a Map | 0 | - | 4.95 | 36,913 |
| US States with an Empty Map | 0 | - | 5.00 | 559,584 |
| Name a Valid U.S. State #1 | 0 | - | 4.95 | 186,552 |
| Great Plains States and Provinces on a Map | 0 | - | 4.94 | 38,743 |
| Draw All US State Borders | 0 | - | 4.99 | 96,116 |
| Top 10 Coldest U.S. States | 0 | - | 4.91 | 101,206 |
| Top 10 Hottest U.S. States | 0 | - | 4.83 | 101,730 |
| Top 10 Most Native American U.S. States | 0 | - | 4.84 | 72,043 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 90,366 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 73,884 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 57,336 |
| Merged U.S. States | 0 | - | 4.40 | 40,632 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 72,307 |
| U.S. States or European Countries by Population | 0 | - | 4.98 | 116,844 |
| Countries that Bordered the USSR | 0 | - | 4.94 | 154,005 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 89,973 |
| Biggest Roman Empire Countries | 0 | - | 4.88 | 82,613 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 402,552 |
| Countries of Asia in 1900 | 0 | - | 4.49 | 53,816 |
| The Persian Gulf War | 0 | - | 4.00 | 7,745 |
| The Vietnam War | 0 | - | 4.41 | 33,049 |
| Colonies of Africa with a Map | 0 | - | 4.79 | 48,820 |
| Random American Countries on a Map | 0 | - | 4.96 | 87,249 |
| South America Flags Map Quiz | 0 | - | 4.95 | 72,166 |
| Most-Spoken Languages of the United States | 0 | - | 4.45 | 165,043 |
| Countries Closest to United States A-Z | 0 | - | 4.84 | 108,147 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.33 | 10,411 |
| History of Florida | 0 | - | 4.44 | 8,782 |
| The Life of Martin Luther King Jr. | 0 | - | 4.80 | 10,416 |
| Hawaiian Islands | 0 | - | 4.85 | 38,701 |
| Hawaiian Islands Map Quiz | 0 | - | 4.88 | 21,173 |
| Boston Red Sox Trivia | 0 | - | 4.12 | 6,805 |
| New York Yankees Trivia | 0 | - | 4.36 | 6,134 |
| History of Texas | 0 | - | 4.41 | 13,556 |
| U.S. States that Border Tennessee | 0 | - | 4.84 | 57,991 |
| American History Quotes #1 | 0 | - | 4.40 | 91,807 |
| People on Money - United States | 0 | - | 4.31 | 61,902 |
| American History Quotes #2 | 0 | - | 4.38 | 39,378 |
| Old West History | 0 | - | 4.28 | 14,811 |
| U.S. History Groups of Two | 0 | - | 4.28 | 35,544 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 41,509 |
| Life of Benjamin Franklin | 0 | - | 4.20 | 6,236 |
| American Revolution - Multiple Choice | 0 | - | 4.32 | 18,902 |
| Last Names in U.S. History #1 | 0 | - | 4.24 | 34,374 |
| Last Names in U.S. History #2 | 0 | - | 4.42 | 16,098 |
| Fifty US States in One Minute | 0 | - | 4.57 | 3,271,089 |
| U.S. State Flags | 0 | - | 4.87 | 138,861 |
| U.S. States that Border Canada | 0 | - | 4.90 | 166,485 |
| Category Elimination - U.S. States #1 | 0 | - | 4.90 | 196,577 |
| Cartoon Versions of U.S. States | 0 | - | 4.82 | 52,760 |
| U.S. State Birds Quiz | 0 | - | 4.35 | 20,617 |
| U.S. State Shapes Quiz #2 | 0 | - | 4.82 | 91,337 |
| U.S. States that Start with M - Shape Quiz | 0 | - | 4.94 | 52,319 |
