| U.S. Presidents Quiz | 0 | - | 5.00 | 3,393,189 |
| Name a Valid U.S. President #1 | 0 | - | 4.91 | 177,688 |
| U.S. Presidential Trivia #1 | 0 | - | 4.52 | 102,379 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.56 | 87,210 |
| U.S. Presidential Trivia #2 | 0 | - | 4.48 | 48,187 |
| Assassinated U.S. Presidents | 0 | - | 4.62 | 85,761 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 35,225 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 32,730 |
| Name a Valid U.S. President #2 | 0 | - | 4.53 | 65,290 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 367,042 |
| U.S. Vice Presidents | 0 | - | 4.39 | 127,380 |
| Governors Who Ran For President | 0 | - | 4.47 | 19,415 |
| U.S. Presidents by Event | 0 | - | 4.57 | 30,476 |
| First Ladies of the United States | 0 | - | 4.27 | 82,356 |
| Presidential Middle Names | 0 | - | 4.37 | 57,709 |
| The Abraham Lincoln Presidency | 0 | - | 4.51 | 25,421 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.30 | 71,345 |
| Random U.S. Vice President to President | 0 | - | 4.48 | 29,274 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.63 | 14,892 |
| Add a Letter - Make a U.S. President | 0 | - | 4.61 | 22,929 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.42 | 23,104 |
| U.S. Presidents by Picture | 0 | - | 4.85 | 408,385 |
| People in Pictures with Barack Obama | 0 | - | 4.11 | 46,341 |
| U.S. Presidents by Picture - Multiple Choice | 0 | - | 4.52 | 26,895 |
| U.S. Presidential Running Mates | 0 | - | 4.39 | 27,181 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,217 |
| The John Adams Presidency | 0 | - | 4.12 | 8,288 |
| The Theodore Roosevelt Presidency | 0 | - | 4.33 | 7,385 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,128 |
| Play-Doh Presidents | 0 | - | 5.00 | 78,241 |
| The George Washington Presidency | 0 | - | 4.03 | 14,029 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,441 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 17,436 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,052 |
| Vietnam War Countries | 0 | - | 4.81 | 89,517 |
| George Washington... or George W. Bush? | 0 | - | 4.16 | 11,745 |
| US Presidents - 1 Minute Sprint | 0 | - | 4.40 | 291,258 |
| U.S. President Scramble | 0 | - | 4.39 | 111,199 |
| U.S. Senators by State | 0 | - | 4.49 | 38,110 |
| U.S. Presidents True or False | 0 | - | 3.94 | 15,021 |
| The Kennedy Family | 0 | - | 3.84 | 13,642 |
| U.S. Presidential Quotes | 0 | - | 4.36 | 43,539 |
| The John F. Kennedy Presidency | 0 | - | 4.47 | 42,164 |
| Deadliest U.S. Wars | 0 | - | 4.83 | 165,272 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 125,285 |
| Mississippi River States Empty Map Quiz | 0 | - | 4.84 | 53,262 |
| Win the U.S. Presidential Election | 0 | - | 4.74 | 561,333 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.71 | 19,593 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.47 | 21,988 |
| The American Revolution | 0 | - | 4.52 | 52,872 |
| United States Map Quiz | 0 | - | 4.98 | 4,028,964 |
| The George W. Bush Presidency | 0 | - | 4.06 | 31,437 |
| People in Pictures with Ronald Reagan | 0 | - | 4.33 | 39,079 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.17 | 31,847 |
| The Barack Obama Presidency | 0 | - | 4.17 | 24,386 |
| Harvard University | 0 | - | 4.15 | 8,026 |
| Third Most Common Language by U.S. State | 0 | - | 4.90 | 110,418 |
| Rust Belt Cities Map Quiz | 0 | - | 4.56 | 33,534 |
| Top 10 U.S. States by Republican Party Support | 0 | - | 4.43 | 72,203 |
| Top 10 U.S. States by Democratic Party Support | 0 | - | 4.63 | 77,304 |
| Presidential Actors | 0 | - | 4.34 | 18,460 |
| Random U.S. Presidents by Picture | 0 | - | 4.37 | 62,926 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.93 | 58,205 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 82,049 |
| Countries of the Soviet Union | 0 | - | 4.98 | 189,146 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 102,953 |
| The Iraq War | 0 | - | 4.46 | 14,926 |
| U.S. State Border Crossings | 0 | - | 4.96 | 85,500 |
| U.S. Citizenship Test Questions | 0 | - | 4.84 | 229,562 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.86 | 69,570 |
| Top 10 U.S. Swing States in the 2024 Election | 0 | - | 4.51 | 72,586 |
| The Bill Clinton Presidency | 0 | - | 4.19 | 30,715 |
| The George H. W. Bush Presidency | 0 | - | 4.34 | 20,956 |
| The Ronald Reagan Presidency | 0 | - | 4.25 | 24,129 |
| The Richard Nixon Presidency | 0 | - | 4.05 | 21,354 |
| The Jimmy Carter Presidency | 0 | - | 4.39 | 18,497 |
| Cities and Towns of Massachusetts | 0 | - | 4.91 | 67,229 |
| US States Quiz | 0 | - | 5.00 | 15,653,619 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.97 | 353,431 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 141,077 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 68,926 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.94 | 56,003 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 64,304 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 51,008 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 77,170 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 134,761 |
| All Modern-Day Countries Ever Controlled by Chinese People | 0 | - | 4.84 | 50,999 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 99,342 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 77,613 |
| Total United States Immigration by Country | 0 | - | 4.88 | 103,039 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.95 | 164,589 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.94 | 199,725 |
| Pixelated United States Map | 0 | - | 4.91 | 87,194 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 100,446 |
| Countries that Visit the United States the Most | 0 | - | 4.95 | 84,447 |
| All U.S. Supreme Court Justices | 0 | - | 4.49 | 27,970 |
| U.S. Cabinet Departments | 0 | - | 4.85 | 69,967 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.41 | 11,056 |
| George Bush... or George Bush | 0 | - | 3.92 | 7,919 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.83 | 61,060 |
| Las Vegas Casinos Quiz | 0 | - | 4.07 | 37,307 |
| Six Flags Over Texas | 0 | - | 4.80 | 60,825 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.88 | 24,631 |
| American History Quotes #1 | 0 | - | 4.41 | 93,422 |
| U.S. History for Dummies | 0 | - | 4.49 | 78,827 |
| The Most Recent... United States | 0 | - | 4.50 | 17,001 |
| U.S. Civil War Decoder | 0 | - | 4.18 | 24,605 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 108,390 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 103,298 |
| 10 Southernmost U.S. States | 0 | - | 4.87 | 105,598 |
| U.S. States with Short Names | 0 | - | 4.89 | 138,798 |
| U.S. States that Start with M | 0 | - | 4.92 | 176,555 |
| U.S. States By Population | 0 | - | 4.90 | 135,957 |
| U.S. States that Start with N | 0 | - | 4.94 | 162,906 |
| U.S. States with Longest Names | 0 | - | 4.87 | 39,780 |
| 10 Northernmost U.S. States | 0 | - | 4.89 | 78,144 |
| U.S. States with a Unique First Letter | 0 | - | 4.95 | 82,594 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 60,921 |
| The Only Remaining U.S. State . . . | 0 | - | 4.94 | 60,170 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.94 | 152,406 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 172,665 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.85 | 118,576 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.83 | 66,229 |
| Top 10 Newest U.S. States | 0 | - | 4.83 | 82,298 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.82 | 61,289 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 55,573 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 100,293 |
| Countries of Iberia in History with a Map | 0 | - | 4.86 | 37,530 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.96 | 80,591 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 108,148 |
| Countries in the Ottoman Empire | 0 | - | 4.88 | 69,558 |
| Countries Bordering China Since 1914 | 0 | - | 4.92 | 91,159 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 83,157 |
| 10 Longest Rivers in the United States | 0 | - | 4.83 | 36,714 |
| Rivers of the United States | 0 | - | 4.92 | 60,949 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.96 | 300,721 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 139,092 |
| Countries that Beat the United States | 0 | - | 4.92 | 156,105 |
| American Revolution Decoder | 0 | - | 4.10 | 20,390 |
| Countries Closest to Alaska | 0 | - | 4.91 | 103,960 |
| California A-Z | 0 | - | 4.48 | 28,280 |
| Top 10 Los Angeles Lakers of All-Time | 0 | - | 4.23 | 44,090 |
| Countries Closest to Maine | 0 | - | 4.85 | 62,326 |
| Embarrassing Chapters in US History | 0 | - | 4.19 | 32,243 |
| The American Civil War | 0 | - | 4.61 | 50,445 |
| Word Scramble - U.S. States | 0 | - | 4.96 | 477,712 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 40,994 |
| US States with an Empty Map | 0 | - | 5.00 | 585,494 |
| Name a Valid U.S. State #1 | 0 | - | 4.95 | 195,086 |
| Great Plains States and Provinces on a Map | 0 | - | 4.94 | 42,882 |
| Draw All US State Borders | 0 | - | 4.99 | 111,918 |
| Top 10 Coldest U.S. States | 0 | - | 4.92 | 106,350 |
| Top 10 Hottest U.S. States | 0 | - | 4.85 | 116,711 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 76,775 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 95,305 |
| U.S. States with the Most Immigrants | 0 | - | 4.84 | 77,686 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.84 | 58,932 |
| Merged U.S. States | 0 | - | 4.39 | 42,079 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 86,131 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 122,635 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 158,562 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.97 | 95,608 |
| All Modern-Day Countries Ever Controlled by French People | 0 | - | 4.99 | 54,334 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 94,007 |
| Ultimate Harry Potter Name Game | 0 | - | 4.95 | 475,948 |
| Commonwealth of Nations Countries | 0 | - | 4.93 | 229,179 |
| Vatican City Country Quiz | 0 | - | 4.51 | 41,666 |
| Most-Visited Countries by Popes | 0 | - | 4.55 | 79,875 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 64,916 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 76,725 |
| Colonies of Africa with a Map | 0 | - | 4.78 | 50,958 |
| Random American Countries on a Map | 0 | - | 4.96 | 91,416 |
| South America Flags Map Quiz | 0 | - | 4.95 | 78,193 |
| Most-Spoken Languages of the United States | 0 | - | 4.44 | 179,366 |
| Countries Closest to United States A-Z | 0 | - | 4.83 | 112,243 |
| History of Florida | 0 | - | 4.45 | 9,309 |
| The Life of Martin Luther King Jr. | 0 | - | 4.79 | 10,683 |
| Hawaiian Islands | 0 | - | 4.84 | 40,256 |
| New York Yankees Trivia | 0 | - | 4.29 | 6,693 |
| History of Texas | 0 | - | 4.43 | 14,046 |
| People on Money - United States | 0 | - | 4.32 | 62,486 |
| American History Quotes #2 | 0 | - | 4.37 | 40,179 |
| Old West History | 0 | - | 4.30 | 14,991 |
| U.S. History Groups of Two | 0 | - | 4.22 | 43,042 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.19 | 42,830 |
| Life of Benjamin Franklin | 0 | - | 4.20 | 6,360 |
| American Revolution - Multiple Choice | 0 | - | 4.34 | 19,347 |
| Last Names in U.S. History #1 | 0 | - | 4.24 | 35,184 |
| Fifty US States in One Minute | 0 | - | 4.53 | 3,398,957 |
| U.S. State Flags | 0 | - | 4.88 | 150,263 |
| U.S. States that Border Canada | 0 | - | 4.91 | 171,177 |
| Category Elimination - U.S. States #1 | 0 | - | 4.92 | 205,810 |
| U.S. State Birds Quiz | 0 | - | 4.36 | 20,912 |
| U.S. States that Start with M - Shape Quiz | 0 | - | 4.93 | 54,488 |
| Neutral European Countries of WWII | 0 | - | 4.92 | 154,283 |
| Countries of the German Empire | 0 | - | 4.51 | 35,742 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 65,005 |
| Biggest Roman Empire Countries | 0 | - | 4.88 | 98,140 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 415,104 |
| Tolkien's Middle Earth Map Quiz | 0 | - | 4.91 | 33,837 |
