| First Names of U.S. Presidents | 0 | - | 4.86 | 382,360 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 427,109 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,490 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,709,244 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,538 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 305,406 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 192,644 |
| The John F. Kennedy Presidency | 0 | - | 4.47 | 43,803 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,212 |
| U.S. President Scramble | 0 | - | 4.40 | 117,028 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,228 |
| The Jimmy Carter Presidency | 0 | - | 4.41 | 19,162 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,759 |
| Most-Visited Countries by U.S. Presidents | 0 | - | 4.96 | 193,908 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 108,946 |
| U.S. Presidents by Event | 0 | - | 4.58 | 34,738 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 94,023 |
| Presidential Middle Names | 0 | - | 4.41 | 60,423 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,460 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,673 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 35,057 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,489 |
| The Barack Obama Presidency | 0 | - | 4.13 | 25,426 |
| Random U.S. States on a Map | 0 | - | 4.96 | 627,893 |
| Random Sequential U.S. States on a Map | 0 | - | 4.99 | 234,746 |
| Presidential Actors | 0 | - | 4.36 | 19,201 |
| The Bill Clinton Presidency | 0 | - | 4.24 | 31,484 |
| The George H. W. Bush Presidency | 0 | - | 4.36 | 21,516 |
| The Ronald Reagan Presidency | 0 | - | 4.26 | 24,846 |
| The Richard Nixon Presidency | 0 | - | 4.05 | 22,040 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 70,228 |
| Random U.S. Presidents by Picture | 0 | - | 4.40 | 66,344 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,515 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,281 |
| First Ladies of the United States | 0 | - | 4.28 | 85,751 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,251 |
| U.S. Presidents in Order by First Letter | 0 | - | 4.32 | 77,282 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,238 |
| Add a Letter - Make a U.S. President | 0 | - | 4.57 | 24,003 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,858 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,983 |
| George Bush... or George Bush | 0 | - | 3.98 | 8,213 |
| U.S. Presidents by Picture - Multiple Choice | 0 | - | 4.50 | 28,900 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,952 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 28,678 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,751 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,673 |
| The John Adams Presidency | 0 | - | 4.12 | 8,762 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,749 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,871 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 129,411 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 20,120 |
| The George Washington Presidency | 0 | - | 4.03 | 14,569 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,949 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,335 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,708 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,190 |
| George Washington... or George W. Bush? | 0 | - | 4.16 | 12,275 |
| United States Map Quiz | 0 | - | 4.98 | 4,163,850 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,651 |
| U.S. Map with Random Merged States | 0 | - | 4.94 | 303,026 |
| Countries of the Soviet Union | 0 | - | 4.98 | 194,821 |
| Vatican City Country Quiz | 0 | - | 4.53 | 44,467 |
| Most-Visited Countries by Popes | 0 | - | 4.56 | 83,883 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,622 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,767 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,812 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,625 |
| U.S. Presidents True or False | 0 | - | 3.96 | 15,618 |
| The Kennedy Family | 0 | - | 3.90 | 14,083 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 74,424 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 40,038 |
| US States Quiz | 0 | - | 5.00 | 16,921,549 |
| Random Sequential European Countries on a Map | 0 | - | 4.99 | 217,544 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 69,677 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,774 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 83,539 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,128 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,346 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,159 |
| Soviet Union Country Quiz | 0 | - | 4.91 | 80,868 |
| Harry Potter Last Names | 0 | - | 4.64 | 950,166 |
| Top 100 Harry Potter Characters by Mention | 0 | - | 4.93 | 395,227 |
| Random Sequential Asian Countries on a Map | 0 | - | 4.99 | 119,253 |
| Random Sequential African Countries on a Map | 0 | - | 5.00 | 127,965 |
| Name the U.S. National Parks | 0 | - | 4.86 | 60,126 |
| Total United States Immigration by Country | 0 | - | 4.91 | 111,892 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 174,886 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 244,907 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 333,229 |
| Pixelated United States Map | 0 | - | 4.88 | 94,486 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 109,962 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 92,009 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,108 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,944 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,831 |
| Win the U.S. Presidential Election | 0 | - | 4.78 | 630,275 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,414 |
| Six Flags Over Texas | 0 | - | 4.78 | 63,454 |
| U.S. History for Dummies | 0 | - | 4.47 | 83,206 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 118,139 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 111,734 |
| 10 Southernmost U.S. States | 0 | - | 4.89 | 113,686 |
| U.S. States with Short Names | 0 | - | 4.91 | 149,361 |
| U.S. States that Start with M | 0 | - | 4.93 | 187,677 |
| U.S. States By Population | 0 | - | 4.92 | 153,756 |
| U.S. States that Start with N | 0 | - | 4.95 | 171,738 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,605 |
| US States with an Empty Map | 0 | - | 5.00 | 626,109 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 82,716 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 367,844 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,520 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,337 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 65,803 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 160,301 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 177,960 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 125,429 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,676 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 86,457 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.85 | 67,733 |
| All Modern-Day Countries Ever Controlled by Greeks | 0 | - | 4.98 | 54,345 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 61,320 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 116,285 |
| Countries of Iberia in History with a Map | 0 | - | 4.88 | 42,072 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,534 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,019 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,806 |
| All Modern-Day Countries Ever Controlled by Chinese People | 0 | - | 4.82 | 54,969 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,111 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 81,430 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,241 |
| Rivers of the United States | 0 | - | 4.93 | 66,361 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 146,714 |
| Countries that Beat the United States | 0 | - | 4.93 | 167,850 |
| Top 10 U.S. States by Republican Party Support | 0 | - | 4.44 | 75,613 |
| Top 10 U.S. States by Democratic Party Support | 0 | - | 4.63 | 81,459 |
| American Founding Fathers | 0 | - | 4.42 | 23,243 |
| American Revolution Decoder | 0 | - | 4.10 | 20,971 |
| Countries Closest to Alaska | 0 | - | 4.93 | 124,602 |
| Countries Closest to Maine | 0 | - | 4.85 | 67,255 |
| People on Money - United States | 0 | - | 4.31 | 63,378 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,508 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,127 |
| Events in U.S. History | 0 | - | 4.41 | 28,718 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,134 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,749 |
| The Most Recent... United States | 0 | - | 4.46 | 18,501 |
| The American Civil War | 0 | - | 4.62 | 52,505 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 507,943 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 48,859 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 209,504 |
| Great Plains States and Provinces on a Map | 0 | - | 4.95 | 49,680 |
| Draw All US State Borders | 0 | - | 4.99 | 138,697 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 125,337 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 125,975 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 92,358 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,954 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,616 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 62,014 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 96,403 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 133,535 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 165,670 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 104,117 |
| All Modern-Day Countries Ever Controlled by French People | 0 | - | 4.99 | 58,230 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,751 |
| Shakespearean Phrases | 0 | - | 4.57 | 36,784 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 237,716 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 70,124 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 83,012 |
| Countries Bordering China Since 1914 | 0 | - | 4.92 | 95,573 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 89,521 |
| Most-Spoken Languages of the United States | 0 | - | 4.52 | 220,878 |
| Names of Generations | 0 | - | 4.09 | 45,215 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 118,357 |
| Most Common High School Mascots | 0 | - | 4.47 | 32,194 |
| U.S. Senators by State | 0 | - | 4.44 | 40,004 |
| Top 10 U.S. Swing States in the 2024 Election | 0 | - | 4.51 | 75,293 |
| U.S. Presidents by State | 0 | - | 4.34 | 68,732 |
| The American Revolution | 0 | - | 4.52 | 54,295 |
| Stephen Curry Quiz | 0 | - | 4.37 | 67,106 |
| History of Florida | 0 | - | 4.45 | 9,844 |
| The Life of Martin Luther King Jr. | 0 | - | 4.73 | 11,115 |
| Hawaiian Islands | 0 | - | 4.83 | 42,780 |
| History of Texas | 0 | - | 4.43 | 14,654 |
| LeBron James Trivia | 0 | - | 4.01 | 171,205 |
| LeBron... or Kobe? | 0 | - | 4.04 | 70,190 |
| History of Pennsylvania | 0 | - | 4.16 | 7,147 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,387 |
| History of Virginia | 0 | - | 4.31 | 11,615 |
| American History Quotes #1 | 0 | - | 4.37 | 96,104 |
| American History Quotes #2 | 0 | - | 4.38 | 41,445 |
| Old West History | 0 | - | 4.34 | 15,285 |
| Life of Benjamin Franklin | 0 | - | 4.24 | 6,528 |
| American Revolution - Multiple Choice | 0 | - | 4.34 | 19,954 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,277 |
| Fifty US States in One Minute | 0 | - | 4.61 | 3,545,357 |
| U.S. State Flags | 0 | - | 4.88 | 171,382 |
| U.S. States that Border Canada | 0 | - | 4.91 | 185,610 |
| Category Elimination - U.S. States #1 | 0 | - | 4.88 | 221,400 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 134,649 |
