| U.S. Presidents Quiz | 0 | - | 5.00 | 3,227,868 |
| Name a Valid U.S. President #1 | 0 | - | 4.93 | 170,225 |
| U.S. Vice Presidents | 0 | - | 4.42 | 122,072 |
| U.S. Presidential Trivia #1 | 0 | - | 4.52 | 98,662 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.57 | 83,244 |
| U.S. Presidential Trivia #2 | 0 | - | 4.51 | 45,442 |
| Assassinated U.S. Presidents | 0 | - | 4.54 | 81,022 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 33,814 |
| Name a Valid U.S. President #2 | 0 | - | 4.52 | 62,334 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 357,149 |
| Governors Who Ran For President | 0 | - | 4.47 | 19,012 |
| U.S. Presidents by Event | 0 | - | 4.58 | 29,448 |
| First Ladies of the United States | 0 | - | 4.27 | 80,747 |
| Presidential Middle Names | 0 | - | 4.37 | 56,548 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 24,996 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 66,354 |
| Random U.S. Vice President to President | 0 | - | 4.55 | 28,388 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.63 | 14,180 |
| Add a Letter - Make a U.S. President | 0 | - | 4.66 | 22,259 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.41 | 22,671 |
| U.S. Presidents Who Died in Office | 0 | - | 4.76 | 31,546 |
| U.S. Presidents by Picture | 0 | - | 4.85 | 398,768 |
| People in Pictures with Barack Obama | 0 | - | 4.11 | 45,438 |
| U.S. Presidents by Picture - Multiple Choice | 0 | - | 4.51 | 25,834 |
| U.S. Presidential Running Mates | 0 | - | 4.39 | 26,173 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 12,952 |
| The John Adams Presidency | 0 | - | 4.10 | 8,052 |
| The Theodore Roosevelt Presidency | 0 | - | 4.33 | 7,191 |
| U.S. Vice Presidential Trivia | 0 | - | 4.31 | 11,639 |
| Play-Doh Presidents | 0 | - | 5.00 | 76,156 |
| The George Washington Presidency | 0 | - | 4.02 | 13,732 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.34 | 10,773 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.32 | 16,975 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.32 | 20,665 |
| Vietnam War Countries | 0 | - | 4.81 | 87,471 |
| US Presidents - 1 Minute Sprint | 0 | - | 4.43 | 282,799 |
| U.S. President Scramble | 0 | - | 4.42 | 107,984 |
| George Washington... or George W. Bush? | 0 | - | 4.14 | 11,460 |
| U.S. Senators by State | 0 | - | 4.49 | 36,786 |
| U.S. Presidents True or False | 0 | - | 3.94 | 14,706 |
| The Kennedy Family | 0 | - | 3.84 | 13,404 |
| U.S. Presidential Quotes | 0 | - | 4.36 | 42,938 |
| The John F. Kennedy Presidency | 0 | - | 4.45 | 41,295 |
| Deadliest U.S. Wars | 0 | - | 4.83 | 160,079 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 123,336 |
| Mississippi River States Empty Map Quiz | 0 | - | 4.84 | 51,592 |
| Win the U.S. Presidential Election | 0 | - | 4.80 | 523,446 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.73 | 19,365 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.47 | 21,213 |
| The American Revolution | 0 | - | 4.55 | 52,064 |
| Six Flags Over Texas | 0 | - | 4.84 | 59,428 |
| United States Map Quiz | 0 | - | 4.98 | 3,934,454 |
| The George W. Bush Presidency | 0 | - | 4.06 | 31,061 |
| People in Pictures with Ronald Reagan | 0 | - | 4.36 | 37,982 |
| The Barack Obama Presidency | 0 | - | 4.17 | 23,797 |
| Harvard University | 0 | - | 4.15 | 7,809 |
| The Iraq War | 0 | - | 4.45 | 14,526 |
| Third Most Common Language by U.S. State | 0 | - | 4.90 | 108,226 |
| Rust Belt Cities Map Quiz | 0 | - | 4.56 | 32,625 |
| Top 10 U.S. States by Republican Party Support | 0 | - | 4.43 | 70,011 |
| Top 10 U.S. States by Democratic Party Support | 0 | - | 4.70 | 74,801 |
| Presidential Actors | 0 | - | 4.34 | 18,007 |
| Random U.S. Presidents by Picture | 0 | - | 4.37 | 60,941 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.92 | 51,830 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 78,297 |
| Countries of the Soviet Union | 0 | - | 4.98 | 186,364 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.91 | 100,646 |
| U.S. State Border Crossings | 0 | - | 4.96 | 83,015 |
| U.S. Citizenship Test Questions | 0 | - | 4.86 | 224,300 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 66,504 |
| Top 10 U.S. Swing States in the 2024 Election | 0 | - | 4.52 | 70,831 |
| The Bill Clinton Presidency | 0 | - | 4.18 | 30,336 |
| The George H. W. Bush Presidency | 0 | - | 4.35 | 20,662 |
| The Ronald Reagan Presidency | 0 | - | 4.25 | 23,768 |
| The Richard Nixon Presidency | 0 | - | 4.10 | 20,972 |
| The Jimmy Carter Presidency | 0 | - | 4.39 | 18,178 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.20 | 30,712 |
| Cities and Towns of Massachusetts | 0 | - | 4.90 | 62,323 |
| US States Quiz | 0 | - | 5.00 | 15,006,044 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.97 | 343,491 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 135,848 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 64,548 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.94 | 51,167 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.97 | 60,331 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 47,563 |
| Soviet Union Country Quiz | 0 | - | 4.91 | 75,339 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 129,170 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.89 | 52,301 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 95,451 |
| Countries of Iberia in History with a Map | 0 | - | 4.82 | 34,987 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.96 | 77,096 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 102,432 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.84 | 55,876 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 67,762 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 95,299 |
| Biggest Mongol Empire Countries | 0 | - | 4.91 | 68,189 |
| Total United States Immigration by Country | 0 | - | 4.90 | 98,269 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.93 | 149,543 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.94 | 189,225 |
| Pixelated United States Map | 0 | - | 4.90 | 83,807 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 95,410 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 80,390 |
| All U.S. Supreme Court Justices | 0 | - | 4.49 | 27,467 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 68,150 |
| George Bush... or George Bush | 0 | - | 3.89 | 7,763 |
| Las Vegas Casinos Quiz | 0 | - | 4.07 | 36,685 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.85 | 22,536 |
| U.S. History for Dummies | 0 | - | 4.50 | 66,355 |
| U.S. Civil War Decoder | 0 | - | 4.17 | 24,232 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 102,177 |
| U.S. States with the Letter Y | 0 | - | 4.86 | 97,867 |
| 10 Southernmost U.S. States | 0 | - | 4.86 | 100,848 |
| U.S. States with Short Names | 0 | - | 4.87 | 132,134 |
| U.S. States that Start with M | 0 | - | 4.91 | 152,731 |
| U.S. States By Population | 0 | - | 4.90 | 131,497 |
| U.S. States that Start with N | 0 | - | 4.95 | 157,494 |
| U.S. States with Longest Names | 0 | - | 4.84 | 36,858 |
| 10 Northernmost U.S. States | 0 | - | 4.89 | 74,777 |
| U.S. States with a Unique First Letter | 0 | - | 4.95 | 79,025 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 59,019 |
| The Only Remaining U.S. State . . . | 0 | - | 4.94 | 57,135 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 146,882 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 168,829 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.85 | 99,876 |
| Top 10 Least Obese U.S. States | 0 | - | 4.81 | 69,388 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 91,388 |
| Ultimate Harry Potter Name Game | 0 | - | 4.95 | 467,726 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 224,341 |
| Vatican City Country Quiz | 0 | - | 4.50 | 40,065 |
| Most-Visited Countries by Popes | 0 | - | 4.65 | 77,598 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 61,848 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 73,103 |
| Countries Bordering China Since 1914 | 0 | - | 4.92 | 88,649 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 79,342 |
| 10 Longest Rivers in the United States | 0 | - | 4.82 | 35,457 |
| Rivers of the United States | 0 | - | 4.92 | 58,145 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.96 | 282,284 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 126,154 |
| Countries that Beat the United States | 0 | - | 4.92 | 148,223 |
| American Revolution Decoder | 0 | - | 4.12 | 20,121 |
| Countries Closest to Alaska | 0 | - | 4.92 | 100,393 |
| California A-Z | 0 | - | 4.48 | 27,945 |
| Top 10 Los Angeles Lakers of All-Time | 0 | - | 4.34 | 42,674 |
| Countries Closest to Maine | 0 | - | 4.86 | 59,922 |
| Embarrassing Chapters in US History | 0 | - | 4.15 | 31,682 |
| The American Civil War | 0 | - | 4.74 | 49,496 |
| Word Scramble - U.S. States | 0 | - | 4.96 | 464,629 |
| Louisiana Purchase with a Map | 0 | - | 4.95 | 37,395 |
| US States with an Empty Map | 0 | - | 5.00 | 563,090 |
| Name a Valid U.S. State #1 | 0 | - | 4.95 | 187,716 |
| Great Plains States and Provinces on a Map | 0 | - | 4.94 | 39,323 |
| Draw All US State Borders | 0 | - | 4.99 | 98,662 |
| U.S. States with the Longest International Borders | 0 | - | 4.81 | 42,498 |
| Top 10 Coldest U.S. States | 0 | - | 4.92 | 102,299 |
| Top 10 Hottest U.S. States | 0 | - | 4.89 | 111,037 |
| Top 10 Most Native American U.S. States | 0 | - | 4.84 | 72,752 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 91,088 |
| U.S. States with the Most Immigrants | 0 | - | 4.86 | 74,536 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.83 | 57,598 |
| Merged U.S. States | 0 | - | 4.40 | 40,846 |
| U.S. States or European Countries by Area | 0 | - | 4.94 | 73,045 |
| U.S. States or European Countries by Population | 0 | - | 4.98 | 117,422 |
| Countries that Bordered the USSR | 0 | - | 4.94 | 154,571 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 90,711 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 404,699 |
| Countries of Asia in 1900 | 0 | - | 4.49 | 54,090 |
| The Persian Gulf War | 0 | - | 4.00 | 7,793 |
| The Vietnam War | 0 | - | 4.41 | 33,191 |
| Colonies of Africa with a Map | 0 | - | 4.79 | 49,150 |
| Random American Countries on a Map | 0 | - | 4.96 | 87,891 |
| South America Flags Map Quiz | 0 | - | 4.95 | 73,095 |
| Most-Spoken Languages of the United States | 0 | - | 4.45 | 165,708 |
| Countries Closest to United States A-Z | 0 | - | 4.84 | 108,639 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.33 | 10,537 |
| History of Florida | 0 | - | 4.44 | 8,849 |
| The Life of Martin Luther King Jr. | 0 | - | 4.80 | 10,459 |
| Hawaiian Islands | 0 | - | 4.86 | 38,939 |
| Boston Red Sox Trivia | 0 | - | 4.03 | 6,839 |
| New York Yankees Trivia | 0 | - | 4.26 | 6,196 |
| History of Texas | 0 | - | 4.41 | 13,626 |
| U.S. States that Border Tennessee | 0 | - | 4.84 | 58,106 |
| American History Quotes #1 | 0 | - | 4.40 | 92,068 |
| People on Money - United States | 0 | - | 4.31 | 61,991 |
| American History Quotes #2 | 0 | - | 4.38 | 39,526 |
| Old West History | 0 | - | 4.29 | 14,835 |
| U.S. History Groups of Two | 0 | - | 4.25 | 42,093 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.18 | 41,717 |
| Life of Benjamin Franklin | 0 | - | 4.20 | 6,256 |
| American Revolution - Multiple Choice | 0 | - | 4.32 | 18,977 |
| Last Names in U.S. History #1 | 0 | - | 4.24 | 34,490 |
| Last Names in U.S. History #2 | 0 | - | 4.42 | 16,218 |
| Fifty US States in One Minute | 0 | - | 4.57 | 3,289,945 |
| U.S. State Flags | 0 | - | 4.88 | 140,491 |
| U.S. States that Border Canada | 0 | - | 4.90 | 167,151 |
| Category Elimination - U.S. States #1 | 0 | - | 4.90 | 197,737 |
| Cartoon Versions of U.S. States | 0 | - | 4.82 | 53,278 |
| U.S. State Birds Quiz | 0 | - | 4.35 | 20,668 |
| U.S. State Shapes Quiz #2 | 0 | - | 4.82 | 91,565 |
| U.S. States that Start with M - Shape Quiz | 0 | - | 4.94 | 52,538 |
| Neutral European Countries of WWII | 0 | - | 4.92 | 149,939 |
