| U.S. Presidents Quiz | 0 | - | 5.00 | 3,698,485 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 426,451 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 381,568 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 191,800 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,299 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 304,946 |
| U.S. President Scramble | 0 | - | 4.40 | 116,773 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 70,009 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 108,727 |
| U.S. Presidents by Event | 0 | - | 4.58 | 34,487 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 93,799 |
| Presidential Middle Names | 0 | - | 4.41 | 60,246 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,336 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,595 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,432 |
| The John F. Kennedy Presidency | 0 | - | 4.47 | 43,741 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,500 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,192 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,955 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,986 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,186 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,886 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,266 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,259 |
| First Ladies of the United States | 0 | - | 4.28 | 85,637 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,228 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 77,094 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,193 |
| Add a Letter - Make a U.S. President | 0 | - | 4.57 | 23,965 |
| U.S. Presidents by Picture - Multiple Choice | 0 | - | 4.50 | 28,843 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,828 |
| The Barack Obama Presidency | 0 | - | 4.13 | 25,397 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 129,262 |
| The Jimmy Carter Presidency | 0 | - | 4.41 | 19,137 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,673 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 28,635 |
| Presidential Actors | 0 | - | 4.36 | 19,172 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,730 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,650 |
| The John Adams Presidency | 0 | - | 4.12 | 8,748 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,744 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,854 |
| The George Washington Presidency | 0 | - | 4.03 | 14,547 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,935 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,323 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,676 |
| Random U.S. States on a Map | 0 | - | 4.96 | 626,400 |
| The Bill Clinton Presidency | 0 | - | 4.24 | 31,458 |
| The George H. W. Bush Presidency | 0 | - | 4.36 | 21,496 |
| The Ronald Reagan Presidency | 0 | - | 4.26 | 24,824 |
| The Richard Nixon Presidency | 0 | - | 4.05 | 22,020 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 20,061 |
| George Washington... or George W. Bush? | 0 | - | 4.16 | 12,265 |
| George Bush... or George Bush | 0 | - | 3.98 | 8,204 |
| Most-Visited Countries by U.S. Presidents | 0 | - | 4.96 | 193,604 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,794 |
| United States Map Quiz | 0 | - | 4.98 | 4,158,372 |
| Win the U.S. Presidential Election | 0 | - | 4.78 | 627,601 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,577 |
| Random Sequential U.S. States on a Map | 0 | - | 4.99 | 234,391 |
| U.S. Map with Random Merged States | 0 | - | 4.94 | 302,462 |
| Top 10 U.S. States by Republican Party Support | 0 | - | 4.44 | 75,513 |
| Top 10 U.S. States by Democratic Party Support | 0 | - | 4.63 | 81,336 |
| U.S. Presidents True or False | 0 | - | 3.96 | 15,601 |
| Random U.S. Presidents by Picture | 0 | - | 4.40 | 66,239 |
| The Kennedy Family | 0 | - | 3.90 | 14,071 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 88,924 |
| Countries of the Soviet Union | 0 | - | 4.98 | 194,586 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,613 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,478 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,452 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,730 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,464 |
| U.S. Senators by State | 0 | - | 4.44 | 39,957 |
| Top 10 U.S. Swing States in the 2024 Election | 0 | - | 4.51 | 75,196 |
| American Revolution Decoder | 0 | - | 4.10 | 20,957 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 74,024 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 39,933 |
| US States Quiz | 0 | - | 5.00 | 16,873,919 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 69,197 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,242 |
| Countries of Europe in 1848 | 0 | - | 4.99 | 81,775 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,666 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,997 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,880 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,738 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 144,614 |
| Vietnam War Countries | 0 | - | 4.82 | 94,222 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,860 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 81,267 |
| Name the U.S. National Parks | 0 | - | 4.86 | 59,940 |
| Total United States Immigration by Country | 0 | - | 4.91 | 111,639 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 174,488 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 244,033 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 331,974 |
| Pixelated United States Map | 0 | - | 4.87 | 94,261 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 109,672 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 91,763 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,073 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,877 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,810 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,220 |
| Six Flags Over Texas | 0 | - | 4.78 | 63,357 |
| U.S. History for Dummies | 0 | - | 4.47 | 83,053 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 117,853 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 111,416 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 113,423 |
| U.S. States with Short Names | 0 | - | 4.91 | 148,991 |
| U.S. States that Start with M | 0 | - | 4.93 | 187,279 |
| U.S. States By Population | 0 | - | 4.92 | 153,537 |
| U.S. States that Start with N | 0 | - | 4.95 | 171,439 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,435 |
| US States with an Empty Map | 0 | - | 5.00 | 624,565 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 82,510 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 367,026 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,294 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,207 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 65,611 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 159,954 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 177,700 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 125,173 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,497 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 86,216 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.85 | 67,508 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 61,113 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 115,983 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,855 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,277 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,604 |
| Harry Potter A-Z | 0 | - | 4.43 | 226,830 |
| Vatican City Country Quiz | 0 | - | 4.53 | 44,363 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,661 |
| All Modern-Day Countries Ever Controlled by Chinese People | 0 | - | 4.82 | 54,810 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,174 |
| Rivers of the United States | 0 | - | 4.93 | 66,197 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 146,446 |
| Countries that Beat the United States | 0 | - | 4.93 | 167,448 |
| American Founding Fathers | 0 | - | 4.42 | 23,224 |
| Countries Closest to Alaska | 0 | - | 4.93 | 124,330 |
| Countries Closest to Maine | 0 | - | 4.85 | 67,106 |
| People on Money - United States | 0 | - | 4.31 | 63,344 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,457 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,051 |
| Events in U.S. History | 0 | - | 4.41 | 28,671 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,111 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,732 |
| The Most Recent... United States | 0 | - | 4.45 | 18,446 |
| The American Civil War | 0 | - | 4.62 | 52,418 |
| Biggest Cities in the Confederate States in 1860 | 0 | - | 4.41 | 23,640 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 506,546 |
| U.S. States by Church Attendance | 0 | - | 4.59 | 32,424 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 48,601 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 208,889 |
| Great Plains States and Provinces on a Map | 0 | - | 4.95 | 49,446 |
| Draw All US State Borders | 0 | - | 4.99 | 137,526 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 124,642 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 125,645 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 92,009 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,757 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,468 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,904 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 96,022 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 133,193 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 165,379 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 103,769 |
| All Modern-Day Countries Ever Controlled by French People | 0 | - | 4.99 | 58,084 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,533 |
| Ultimate Harry Potter Name Game | 0 | - | 4.94 | 493,368 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 237,400 |
| Most-Visited Countries by Popes | 0 | - | 4.56 | 83,724 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 69,893 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 82,689 |
| Countries Bordering China Since 1914 | 0 | - | 4.93 | 95,244 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 89,273 |
| Colonies of Africa with a Map | 0 | - | 4.78 | 54,442 |
| Most-Spoken Languages of the United States | 0 | - | 4.52 | 219,980 |
| Names of Generations | 0 | - | 4.09 | 44,897 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 118,160 |
| Most Common High School Mascots | 0 | - | 4.47 | 32,128 |
| The American Revolution | 0 | - | 4.52 | 54,255 |
| Stephen Curry Quiz | 0 | - | 4.37 | 66,961 |
| History of Florida | 0 | - | 4.45 | 9,825 |
| The Life of Martin Luther King Jr. | 0 | - | 4.73 | 11,105 |
| Hawaiian Islands | 0 | - | 4.83 | 42,707 |
| History of Texas | 0 | - | 4.43 | 14,626 |
| LeBron James Trivia | 0 | - | 4.01 | 170,925 |
| LeBron... or Kobe? | 0 | - | 4.04 | 69,990 |
| History of Pennsylvania | 0 | - | 4.16 | 7,135 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,319 |
| History of Virginia | 0 | - | 4.31 | 11,599 |
| American History Quotes #1 | 0 | - | 4.37 | 96,029 |
| American History Quotes #2 | 0 | - | 4.38 | 41,401 |
| Old West History | 0 | - | 4.34 | 15,274 |
| Life of Benjamin Franklin | 0 | - | 4.24 | 6,519 |
| American Revolution - Multiple Choice | 0 | - | 4.34 | 19,927 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,240 |
| Fifty US States in One Minute | 0 | - | 4.61 | 3,538,936 |
| U.S. State Flags | 0 | - | 4.89 | 170,426 |
| U.S. States that Border Canada | 0 | - | 4.91 | 184,900 |
| Category Elimination - U.S. States #1 | 0 | - | 4.88 | 220,783 |
