| U.S. Presidents Quiz | 0 | - | 5.00 | 3,172,682 |
| Name a Valid U.S. President #1 | 0 | - | 4.93 | 167,223 |
| U.S. Vice Presidents | 0 | - | 4.42 | 119,601 |
| U.S. Presidential Trivia #1 | 0 | - | 4.51 | 96,994 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.56 | 81,631 |
| U.S. Presidential Trivia #2 | 0 | - | 4.51 | 39,747 |
| Assassinated U.S. Presidents | 0 | - | 4.54 | 80,069 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 33,543 |
| Name a Valid U.S. President #2 | 0 | - | 4.52 | 61,242 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 353,201 |
| Governors Who Ran For President | 0 | - | 4.47 | 18,893 |
| U.S. Presidents by Event | 0 | - | 4.58 | 29,100 |
| U.S. Presidential Running Mates | 0 | - | 4.41 | 25,720 |
| First Ladies of the United States | 0 | - | 4.27 | 79,908 |
| Presidential Middle Names | 0 | - | 4.37 | 56,112 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 24,843 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.31 | 64,441 |
| Random U.S. Vice President to President | 0 | - | 4.57 | 23,220 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.63 | 13,902 |
| Add a Letter - Make a U.S. President | 0 | - | 4.66 | 21,918 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.41 | 22,524 |
| U.S. Presidents Who Died in Office | 0 | - | 4.75 | 31,221 |
| U.S. Presidents by Picture | 0 | - | 4.85 | 394,635 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 45,108 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 12,872 |
| The John Adams Presidency | 0 | - | 4.10 | 7,974 |
| U.S. Vice Presidential Trivia | 0 | - | 4.29 | 11,416 |
| Play-Doh Presidents | 0 | - | 5.00 | 74,575 |
| The George Washington Presidency | 0 | - | 4.02 | 13,632 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.33 | 10,691 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.32 | 16,805 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.32 | 20,513 |
| Vietnam War Countries | 0 | - | 4.81 | 86,464 |
| US Presidents - 1 Minute Sprint | 0 | - | 4.44 | 279,024 |
| U.S. President Scramble | 0 | - | 4.37 | 90,864 |
| U.S. Senators by State | 0 | - | 4.49 | 36,152 |
| U.S. Presidents True or False | 0 | - | 3.94 | 14,592 |
| The Kennedy Family | 0 | - | 3.85 | 13,271 |
| U.S. Presidential Quotes | 0 | - | 4.36 | 42,723 |
| The John F. Kennedy Presidency | 0 | - | 4.45 | 40,963 |
| Deadliest U.S. Wars | 0 | - | 4.83 | 158,163 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 122,538 |
| Mississippi River States Empty Map Quiz | 0 | - | 4.85 | 51,031 |
| Win the U.S. Presidential Election | 0 | - | 4.79 | 509,305 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.75 | 19,259 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.46 | 20,877 |
| The American Revolution | 0 | - | 4.51 | 51,700 |
| Six Flags Over Texas | 0 | - | 4.84 | 58,783 |
| United States Map Quiz | 0 | - | 4.98 | 3,903,499 |
| The George W. Bush Presidency | 0 | - | 4.06 | 30,905 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 37,533 |
| The Barack Obama Presidency | 0 | - | 4.17 | 23,591 |
| Harvard University | 0 | - | 4.15 | 7,732 |
| The Iraq War | 0 | - | 4.43 | 14,369 |
| Third Most Common Language by U.S. State | 0 | - | 4.91 | 107,098 |
| Rust Belt Cities Map Quiz | 0 | - | 4.56 | 32,190 |
| Top 10 U.S. States by Republican Party Support | 0 | - | 4.43 | 69,136 |
| Top 10 U.S. States by Democratic Party Support | 0 | - | 4.70 | 73,804 |
| Presidential Actors | 0 | - | 4.33 | 17,805 |
| Random U.S. Presidents by Picture | 0 | - | 4.37 | 60,020 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.92 | 49,649 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 76,860 |
| Countries of the Soviet Union | 0 | - | 4.98 | 184,910 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.91 | 100,018 |
| U.S. State Border Crossings | 0 | - | 4.96 | 82,133 |
| U.S. Citizenship Test Questions | 0 | - | 4.86 | 222,166 |
| Five Biggest Immigrant Groups by Decade in the US | 0 | - | 4.83 | 33,295 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 65,334 |
| Top 10 U.S. Swing States in the 2024 Election | 0 | - | 4.52 | 70,058 |
| The Bill Clinton Presidency | 0 | - | 4.18 | 30,176 |
| The George H. W. Bush Presidency | 0 | - | 4.35 | 20,542 |
| The Ronald Reagan Presidency | 0 | - | 4.25 | 23,616 |
| The Richard Nixon Presidency | 0 | - | 4.10 | 20,826 |
| The Jimmy Carter Presidency | 0 | - | 4.39 | 18,045 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.20 | 30,131 |
| Cities and Towns of Massachusetts | 0 | - | 4.89 | 60,407 |
| US States Quiz | 0 | - | 5.00 | 14,747,447 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.97 | 340,192 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 133,759 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 62,859 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.93 | 49,340 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.97 | 58,783 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 46,471 |
| Soviet Union Country Quiz | 0 | - | 4.91 | 74,556 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.96 | 126,668 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.88 | 51,099 |
| Biggest Spanish Empire Countries | 0 | - | 4.90 | 93,631 |
| Countries of Iberia in History with a Map | 0 | - | 4.81 | 34,014 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 75,710 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 100,137 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.84 | 54,766 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 67,184 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 93,637 |
| Biggest Mongol Empire Countries | 0 | - | 4.91 | 67,442 |
| Total United States Immigration by Country | 0 | - | 4.89 | 96,754 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.93 | 147,004 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.95 | 184,979 |
| Pixelated United States Map | 0 | - | 4.90 | 82,228 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 93,356 |
| Countries that Visit the United States the Most | 0 | - | 4.95 | 78,687 |
| All U.S. Supreme Court Justices | 0 | - | 4.49 | 27,326 |
| U.S. Cabinet Departments | 0 | - | 4.85 | 67,607 |
| George Bush... or George Bush | 0 | - | 3.89 | 7,708 |
| Las Vegas Casinos Quiz | 0 | - | 4.10 | 36,040 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.83 | 21,631 |
| U.S. History for Dummies | 0 | - | 4.49 | 65,397 |
| U.S. Civil War Decoder | 0 | - | 4.16 | 24,083 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 100,582 |
| U.S. States with the Letter Y | 0 | - | 4.86 | 96,193 |
| 10 Southernmost U.S. States | 0 | - | 4.84 | 99,247 |
| U.S. States with Short Names | 0 | - | 4.87 | 129,740 |
| U.S. States that Start with M | 0 | - | 4.91 | 150,486 |
| U.S. States By Population | 0 | - | 4.90 | 129,994 |
| U.S. States that Start with N | 0 | - | 4.95 | 155,549 |
| U.S. States with Longest Names | 0 | - | 4.84 | 36,053 |
| 10 Northernmost U.S. States | 0 | - | 4.89 | 73,688 |
| U.S. States with a Unique First Letter | 0 | - | 4.95 | 77,857 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 58,373 |
| The Only Remaining U.S. State . . . | 0 | - | 4.94 | 56,116 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 145,403 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 167,911 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.85 | 99,053 |
| Top 10 Newest U.S. States | 0 | - | 4.81 | 68,107 |
| Top 10 Least Obese U.S. States | 0 | - | 4.81 | 68,152 |
| The United States... or the United Kingdom? | 0 | - | 4.89 | 90,292 |
| Ultimate Harry Potter Name Game | 0 | - | 4.95 | 463,790 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 222,178 |
| Vatican City Country Quiz | 0 | - | 4.49 | 39,242 |
| Most-Visited Countries by Popes | 0 | - | 4.59 | 74,698 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 60,679 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 71,699 |
| Countries Bordering China Since 1914 | 0 | - | 4.91 | 87,798 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 77,995 |
| 10 Longest Rivers in the United States | 0 | - | 4.82 | 35,018 |
| Rivers of the United States | 0 | - | 4.91 | 56,993 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.95 | 274,196 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 124,488 |
| Countries that Beat the United States | 0 | - | 4.92 | 145,720 |
| American Revolution Decoder | 0 | - | 4.12 | 19,997 |
| Countries Closest to Alaska | 0 | - | 4.93 | 99,038 |
| California A-Z | 0 | - | 4.48 | 27,823 |
| Top 10 Los Angeles Lakers of All-Time | 0 | - | 4.32 | 41,833 |
| Countries Closest to Maine | 0 | - | 4.85 | 58,964 |
| The American Civil War | 0 | - | 4.72 | 49,048 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 459,257 |
| Louisiana Purchase with a Map | 0 | - | 4.95 | 36,204 |
| US States with an Empty Map | 0 | - | 5.00 | 554,254 |
| Name a Valid U.S. State #1 | 0 | - | 4.95 | 184,839 |
| Great Plains States and Provinces on a Map | 0 | - | 4.94 | 38,039 |
| Draw All US State Borders | 0 | - | 4.99 | 93,296 |
| U.S. States with the Longest International Borders | 0 | - | 4.81 | 40,795 |
| Top 10 Coldest U.S. States | 0 | - | 4.91 | 100,280 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 100,752 |
| Top 10 Most Native American U.S. States | 0 | - | 4.84 | 71,323 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.89 | 89,513 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 73,215 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 57,118 |
| Merged U.S. States | 0 | - | 4.38 | 40,353 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 71,256 |
| U.S. States or European Countries by Population | 0 | - | 4.98 | 116,135 |
| Countries that Bordered the USSR | 0 | - | 4.95 | 152,724 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 88,857 |
| Biggest Roman Empire Countries | 0 | - | 4.88 | 82,053 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 399,763 |
| Countries of Asia in 1900 | 0 | - | 4.49 | 53,412 |
| The Persian Gulf War | 0 | - | 3.98 | 7,702 |
| The Vietnam War | 0 | - | 4.41 | 32,830 |
| Colonies of Africa with a Map | 0 | - | 4.79 | 48,376 |
| Random American Countries on a Map | 0 | - | 4.95 | 86,196 |
| South America Flags Map Quiz | 0 | - | 4.95 | 70,908 |
| Most-Spoken Languages of the United States | 0 | - | 4.45 | 163,739 |
| Countries Closest to United States A-Z | 0 | - | 4.84 | 107,427 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.33 | 10,362 |
| History of Florida | 0 | - | 4.44 | 8,723 |
| The Life of Martin Luther King Jr. | 0 | - | 4.79 | 10,359 |
| Hawaiian Islands | 0 | - | 4.85 | 38,495 |
| Hawaiian Islands Map Quiz | 0 | - | 4.88 | 21,014 |
| Boston Red Sox Trivia | 0 | - | 4.12 | 6,756 |
| New York Yankees Trivia | 0 | - | 4.36 | 6,018 |
| History of Texas | 0 | - | 4.41 | 13,487 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 57,835 |
| American History Quotes #1 | 0 | - | 4.40 | 91,401 |
| People on Money - United States | 0 | - | 4.31 | 61,786 |
| American History Quotes #2 | 0 | - | 4.34 | 39,226 |
| Old West History | 0 | - | 4.28 | 14,786 |
| U.S. History Groups of Two | 0 | - | 4.28 | 35,340 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 41,290 |
| Life of Benjamin Franklin | 0 | - | 4.18 | 6,221 |
| American Revolution - Multiple Choice | 0 | - | 4.32 | 18,810 |
| Last Names in U.S. History #1 | 0 | - | 4.24 | 34,254 |
| Last Names in U.S. History #2 | 0 | - | 4.41 | 15,986 |
| Fifty US States in One Minute | 0 | - | 4.55 | 3,246,436 |
| U.S. State Flags | 0 | - | 4.88 | 136,522 |
| U.S. States that Border Canada | 0 | - | 4.90 | 165,874 |
| Category Elimination - U.S. States #1 | 0 | - | 4.90 | 195,008 |
| Cartoon Versions of U.S. States | 0 | - | 4.84 | 52,024 |
| U.S. State Birds Quiz | 0 | - | 4.35 | 20,554 |
| U.S. State Shapes Quiz #2 | 0 | - | 4.82 | 91,006 |
| U.S. States that Start with M - Shape Quiz | 0 | - | 4.94 | 51,976 |
| Neutral European Countries of WWII | 0 | - | 4.92 | 148,011 |
