| U.S. Presidents Quiz | 0 | - | 5.00 | 3,226,035 |
| U.S. Presidents by Picture | 0 | - | 4.85 | 398,641 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 357,065 |
| Name a Valid U.S. President #1 | 0 | - | 4.93 | 170,152 |
| Play-Doh Presidents | 0 | - | 5.00 | 76,140 |
| US Presidents - 1 Minute Sprint | 0 | - | 4.43 | 282,712 |
| U.S. President Scramble | 0 | - | 4.42 | 107,942 |
| Name a Valid U.S. President #2 | 0 | - | 4.52 | 62,309 |
| U.S. Vice Presidents | 0 | - | 4.42 | 121,976 |
| U.S. Presidential Trivia #1 | 0 | - | 4.52 | 98,633 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.57 | 83,204 |
| U.S. Presidential Trivia #2 | 0 | - | 4.51 | 45,410 |
| Assassinated U.S. Presidents | 0 | - | 4.54 | 80,995 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 33,809 |
| The John F. Kennedy Presidency | 0 | - | 4.45 | 41,286 |
| U.S. Presidential Quotes | 0 | - | 4.36 | 42,931 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.41 | 22,665 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.47 | 21,200 |
| People in Pictures with Barack Obama | 0 | - | 4.11 | 45,429 |
| Governors Who Ran For President | 0 | - | 4.47 | 19,008 |
| U.S. Presidents by Event | 0 | - | 4.58 | 29,441 |
| First Ladies of the United States | 0 | - | 4.27 | 80,722 |
| Presidential Middle Names | 0 | - | 4.37 | 56,540 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 24,993 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 66,313 |
| Random U.S. Vice President to President | 0 | - | 4.55 | 28,366 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.63 | 14,167 |
| Add a Letter - Make a U.S. President | 0 | - | 4.66 | 22,252 |
| The George W. Bush Presidency | 0 | - | 4.06 | 31,057 |
| U.S. Presidents Who Died in Office | 0 | - | 4.76 | 31,540 |
| The Barack Obama Presidency | 0 | - | 4.17 | 23,793 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 123,313 |
| People in Pictures with Ronald Reagan | 0 | - | 4.36 | 37,970 |
| U.S. Presidential Running Mates | 0 | - | 4.39 | 26,166 |
| Presidential Actors | 0 | - | 4.34 | 18,001 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 12,949 |
| The John Adams Presidency | 0 | - | 4.10 | 8,050 |
| The Theodore Roosevelt Presidency | 0 | - | 4.33 | 7,191 |
| U.S. Vice Presidential Trivia | 0 | - | 4.31 | 11,635 |
| The George Washington Presidency | 0 | - | 4.02 | 13,730 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.34 | 10,769 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.32 | 16,972 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.32 | 20,657 |
| Random U.S. States on a Map | 0 | - | 4.95 | 511,979 |
| The Bill Clinton Presidency | 0 | - | 4.18 | 30,326 |
| The George H. W. Bush Presidency | 0 | - | 4.35 | 20,659 |
| The Ronald Reagan Presidency | 0 | - | 4.25 | 23,763 |
| The Richard Nixon Presidency | 0 | - | 4.10 | 20,968 |
| The Jimmy Carter Presidency | 0 | - | 4.39 | 18,174 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.73 | 19,362 |
| George Washington... or George W. Bush? | 0 | - | 4.14 | 11,456 |
| George Bush... or George Bush | 0 | - | 3.89 | 7,760 |
| Most-Visited Countries by U.S. Presidents | 0 | - | 4.97 | 180,388 |
| Six Flags Over Texas | 0 | - | 4.84 | 59,414 |
| Deadliest U.S. Wars | 0 | - | 4.83 | 160,031 |
| United States Map Quiz | 0 | - | 4.98 | 3,933,658 |
| Win the U.S. Presidential Election | 0 | - | 4.80 | 523,046 |
| Random Sequential U.S. States on a Map | 0 | - | 4.99 | 220,723 |
| U.S. Map with Random Merged States | 0 | - | 4.94 | 278,594 |
| Top 10 U.S. States by Republican Party Support | 0 | - | 4.43 | 69,973 |
| Top 10 U.S. States by Democratic Party Support | 0 | - | 4.70 | 74,769 |
| U.S. Presidents True or False | 0 | - | 3.94 | 14,702 |
| Random U.S. Presidents by Picture | 0 | - | 4.37 | 60,884 |
| The Kennedy Family | 0 | - | 3.84 | 13,400 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 78,249 |
| Countries of the Soviet Union | 0 | - | 4.98 | 186,137 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.91 | 100,604 |
| Vietnam War Countries | 0 | - | 4.81 | 87,441 |
| U.S. State Border Crossings | 0 | - | 4.96 | 82,992 |
| U.S. Citizenship Test Questions | 0 | - | 4.86 | 224,249 |
| Third Most Common Language by U.S. State | 0 | - | 4.90 | 108,197 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 66,476 |
| U.S. Senators by State | 0 | - | 4.49 | 36,743 |
| Top 10 U.S. Swing States in the 2024 Election | 0 | - | 4.52 | 70,799 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.20 | 30,698 |
| American Revolution Decoder | 0 | - | 4.12 | 20,118 |
| Cities and Towns of Massachusetts | 0 | - | 4.90 | 62,259 |
| US States Quiz | 0 | - | 5.00 | 14,998,470 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.92 | 51,749 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 135,780 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 64,500 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.94 | 51,097 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.97 | 60,287 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 47,504 |
| Soviet Union Country Quiz | 0 | - | 4.91 | 75,308 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 129,093 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.89 | 52,266 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 95,382 |
| Countries of Iberia in History with a Map | 0 | - | 4.82 | 34,955 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.96 | 77,063 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 102,365 |
| Vatican City Country Quiz | 0 | - | 4.50 | 40,043 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.84 | 55,852 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 67,741 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 95,245 |
| Biggest Mongol Empire Countries | 0 | - | 4.91 | 68,160 |
| Total United States Immigration by Country | 0 | - | 4.90 | 98,226 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.93 | 149,432 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.94 | 189,091 |
| Pixelated United States Map | 0 | - | 4.90 | 83,774 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 95,340 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 80,335 |
| All U.S. Supreme Court Justices | 0 | - | 4.49 | 27,463 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 68,131 |
| U.S. History for Dummies | 0 | - | 4.50 | 66,327 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 102,136 |
| U.S. States with the Letter Y | 0 | - | 4.86 | 97,824 |
| 10 Southernmost U.S. States | 0 | - | 4.86 | 100,807 |
| U.S. States with Short Names | 0 | - | 4.87 | 132,081 |
| U.S. States that Start with M | 0 | - | 4.91 | 152,672 |
| U.S. States By Population | 0 | - | 4.90 | 131,469 |
| U.S. States that Start with N | 0 | - | 4.95 | 157,442 |
| U.S. States with Longest Names | 0 | - | 4.84 | 36,834 |
| US States with an Empty Map | 0 | - | 5.00 | 562,769 |
| 10 Northernmost U.S. States | 0 | - | 4.89 | 74,757 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.97 | 343,399 |
| U.S. States with a Unique First Letter | 0 | - | 4.95 | 78,978 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 59,009 |
| The Only Remaining U.S. State . . . | 0 | - | 4.94 | 57,102 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 146,826 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 168,798 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.85 | 99,837 |
| Top 10 Least Obese U.S. States | 0 | - | 4.81 | 69,365 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 91,352 |
| Harry Potter A-Z | 0 | - | 4.40 | 203,744 |
| Ultimate Harry Potter Name Game | 0 | - | 4.95 | 467,624 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 224,260 |
| Most-Visited Countries by Popes | 0 | - | 4.65 | 77,566 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 61,814 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 73,054 |
| Countries Bordering China Since 1914 | 0 | - | 4.92 | 88,615 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 79,285 |
| 10 Longest Rivers in the United States | 0 | - | 4.82 | 35,442 |
| Rivers of the United States | 0 | - | 4.92 | 58,102 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.96 | 281,988 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 126,114 |
| Countries that Beat the United States | 0 | - | 4.92 | 148,160 |
| Countries Closest to Alaska | 0 | - | 4.92 | 100,345 |
| Countries Closest to Maine | 0 | - | 4.86 | 59,888 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.85 | 22,510 |
| People on Money - United States | 0 | - | 4.31 | 61,982 |
| U.S. History Groups of Two | 0 | - | 4.25 | 42,065 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.18 | 41,706 |
| Embarrassing Chapters in US History | 0 | - | 4.15 | 31,673 |
| The American Civil War | 0 | - | 4.74 | 49,485 |
| Word Scramble - U.S. States | 0 | - | 4.96 | 464,455 |
| Louisiana Purchase with a Map | 0 | - | 4.95 | 37,348 |
| Name a Valid U.S. State #1 | 0 | - | 4.95 | 187,595 |
| Great Plains States and Provinces on a Map | 0 | - | 4.94 | 39,263 |
| Draw All US State Borders | 0 | - | 4.99 | 98,525 |
| U.S. States with the Longest International Borders | 0 | - | 4.81 | 42,443 |
| Top 10 Coldest U.S. States | 0 | - | 4.91 | 102,084 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 107,793 |
| Top 10 Most Native American U.S. States | 0 | - | 4.84 | 72,658 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 91,044 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 74,508 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 57,541 |
| U.S. States or European Countries by Area | 0 | - | 4.94 | 72,999 |
| U.S. States or European Countries by Population | 0 | - | 4.98 | 117,385 |
| Countries that Bordered the USSR | 0 | - | 4.94 | 154,493 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 90,659 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 404,533 |
| Groups of Things - Harry Potter | 0 | - | 4.85 | 263,868 |
| Countries of the Popes | 0 | - | 4.84 | 113,384 |
| Countries of Asia in 1900 | 0 | - | 4.49 | 54,072 |
| The Vietnam War | 0 | - | 4.41 | 33,185 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 99,334 |
| Colonies of Africa with a Map | 0 | - | 4.79 | 49,122 |
| Most-Spoken Languages of the United States | 0 | - | 4.45 | 165,661 |
| Countries Closest to United States A-Z | 0 | - | 4.84 | 108,593 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.33 | 10,535 |
| The American Revolution | 0 | - | 4.55 | 52,057 |
| Stephen Curry Quiz | 0 | - | 4.35 | 60,717 |
| History of Florida | 0 | - | 4.44 | 8,845 |
| The Life of Martin Luther King Jr. | 0 | - | 4.80 | 10,455 |
| Hawaiian Islands | 0 | - | 4.86 | 38,926 |
| History of Texas | 0 | - | 4.41 | 13,621 |
| LeBron... or Kobe? | 0 | - | 4.10 | 54,916 |
| History of Pennsylvania | 0 | - | 4.09 | 6,523 |
| U.S. States that Border Tennessee | 0 | - | 4.84 | 58,087 |
| History of Virginia | 0 | - | 4.33 | 11,011 |
| American History Quotes #1 | 0 | - | 4.40 | 92,051 |
| American History Quotes #2 | 0 | - | 4.38 | 39,523 |
| Old West History | 0 | - | 4.29 | 14,831 |
| Events in U.S. History | 0 | - | 4.38 | 26,431 |
| Life of Benjamin Franklin | 0 | - | 4.20 | 6,254 |
| American Revolution - Multiple Choice | 0 | - | 4.32 | 18,966 |
| Last Names in U.S. History #1 | 0 | - | 4.24 | 34,485 |
| Last Names in U.S. History #2 | 0 | - | 4.42 | 16,213 |
| Fifty US States in One Minute | 0 | - | 4.57 | 3,288,047 |
| U.S. State Flags | 0 | - | 4.88 | 140,353 |
| U.S. States that Border Canada | 0 | - | 4.90 | 167,006 |
| U.S. States by Church Attendance | 0 | - | 4.58 | 30,494 |
| Category Elimination - U.S. States #1 | 0 | - | 4.90 | 197,643 |
| Cartoon Versions of U.S. States | 0 | - | 4.82 | 53,242 |
| U.S. State Shapes Quiz #2 | 0 | - | 4.82 | 91,546 |
| U.S. States that Start with M - Shape Quiz | 0 | - | 4.94 | 52,516 |
| Neutral European Countries of WWII | 0 | - | 4.92 | 149,872 |
| Countries of Europe After World War II | 0 | - | 4.99 | 173,228 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 141,685 |
