| U.S. Presidents Quiz | 0 | - | 5.00 | 3,719,550 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 193,406 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 109,218 |
| U.S. Presidents by Event | 0 | - | 4.58 | 35,123 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.62 | 94,470 |
| Presidential Middle Names | 0 | - | 4.41 | 60,627 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,579 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,831 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,591 |
| Win the 1828 U.S. Presidential Election | 0 | - | 4.30 | 51,838 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 35,162 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 70,470 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 383,204 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,805 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,342 |
| U.S. Presidential Running Mates | 0 | - | 4.41 | 28,733 |
| First Ladies of the United States | 0 | - | 4.28 | 85,877 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,287 |
| U.S. Presidents in Order by First Letter | 0 | - | 4.32 | 77,395 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,325 |
| Add a Letter - Make a U.S. President | 0 | - | 4.58 | 24,071 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,921 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 24,038 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 428,034 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 48,049 |
| U.S. Presidents by Picture - Multiple Choice | 0 | - | 4.50 | 28,982 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,767 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,730 |
| The John Adams Presidency | 0 | - | 4.12 | 8,777 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,765 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,905 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,762 |
| The George Washington Presidency | 0 | - | 4.03 | 14,593 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,975 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,367 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,744 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 305,967 |
| Vietnam War Countries | 0 | - | 4.82 | 94,515 |
| George Washington... or George W. Bush? | 0 | - | 4.16 | 12,293 |
| U.S. President Scramble | 0 | - | 4.40 | 117,361 |
| U.S. Presidents True or False | 0 | - | 3.96 | 15,637 |
| The Kennedy Family | 0 | - | 3.90 | 14,091 |
| U.S. Senators by State | 0 | - | 4.44 | 40,074 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,585 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,259 |
| The John F. Kennedy Presidency | 0 | - | 4.47 | 43,890 |
| The American Revolution | 0 | - | 4.52 | 54,328 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,589 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 129,545 |
| Mississippi River States Empty Map Quiz | 0 | - | 4.82 | 56,183 |
| Win the U.S. Presidential Election | 0 | - | 4.78 | 633,798 |
| The Jimmy Carter Presidency | 0 | - | 4.41 | 19,203 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 20,138 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,887 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,306 |
| United States Map Quiz | 0 | - | 4.98 | 4,168,177 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,770 |
| Random U.S. Presidents by Picture | 0 | - | 4.40 | 66,509 |
| The Barack Obama Presidency | 0 | - | 4.13 | 25,479 |
| Harvard University | 0 | - | 4.15 | 8,319 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 89,535 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,788 |
| The Iraq War | 0 | - | 4.47 | 15,694 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,929 |
| Rust Belt Cities Map Quiz | 0 | - | 4.57 | 35,231 |
| Top 10 U.S. States by Republican Party Support | 0 | - | 4.44 | 75,739 |
| Top 10 U.S. States by Democratic Party Support | 0 | - | 4.63 | 81,596 |
| Top 10 U.S. Swing States in the 2024 Election | 0 | - | 4.51 | 75,372 |
| Presidential Actors | 0 | - | 4.36 | 19,232 |
| The Bill Clinton Presidency | 0 | - | 4.24 | 31,516 |
| The George H. W. Bush Presidency | 0 | - | 4.36 | 21,539 |
| The Ronald Reagan Presidency | 0 | - | 4.26 | 24,874 |
| The Richard Nixon Presidency | 0 | - | 4.05 | 22,078 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 70,112 |
| U.S. States Closest to Moscow | 0 | - | 4.50 | 48,208 |
| Countries of the Soviet Union | 0 | - | 4.98 | 195,408 |
| Soviet Union Country Quiz | 0 | - | 4.91 | 81,044 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,783 |
| Name the U.S. National Parks | 0 | - | 4.86 | 60,350 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,626 |
| Total United States Immigration by Country | 0 | - | 4.91 | 112,188 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,820 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 175,323 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 245,881 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 73,052 |
| Cities and Towns of Massachusetts | 0 | - | 4.93 | 74,827 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,609 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 40,180 |
| US States Quiz | 0 | - | 5.00 | 16,965,702 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 368,310 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,112 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 84,764 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,525 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,650 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,412 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 145,371 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 116,628 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,489 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,352 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,341 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 334,682 |
| Pixelated United States Map | 0 | - | 4.88 | 94,671 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 110,317 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 92,271 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 147,003 |
| Countries that Beat the United States | 0 | - | 4.93 | 168,366 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,132 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,853 |
| George Bush... or George Bush | 0 | - | 3.98 | 8,232 |
| American Revolution Decoder | 0 | - | 4.12 | 20,982 |
| California A-Z | 0 | - | 4.49 | 28,829 |
| Las Vegas Casinos | 0 | - | 4.13 | 38,125 |
| Six Flags Over Texas | 0 | - | 4.78 | 63,552 |
| U.S. History for Dummies | 0 | - | 4.47 | 83,337 |
| The Most Recent... United States | 0 | - | 4.46 | 18,545 |
| The American Civil War | 0 | - | 4.62 | 52,588 |
| U.S. Civil War Decoder | 0 | - | 4.14 | 25,328 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 118,835 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 509,227 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 112,064 |
| 10 Southernmost U.S. States | 0 | - | 4.89 | 114,073 |
| U.S. States with Short Names | 0 | - | 4.91 | 149,758 |
| U.S. States that Start with M | 0 | - | 4.93 | 188,081 |
| U.S. States By Population | 0 | - | 4.92 | 153,994 |
| U.S. States that Start with N | 0 | - | 4.95 | 172,024 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,777 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 49,133 |
| US States with an Empty Map | 0 | - | 5.00 | 627,617 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 82,960 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,743 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,457 |
| Draw All US State Borders | 0 | - | 4.99 | 140,039 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 65,976 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 160,524 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 178,094 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 125,578 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,769 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 86,569 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 102,314 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,943 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.85 | 67,909 |
| Merged U.S. States | 0 | - | 4.37 | 44,364 |
| Draw All US State Borders - Extreme | 0 | - | 4.99 | 79,086 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 96,819 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 133,928 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 166,288 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 104,468 |
| All Modern-Day Countries Ever Controlled by Greeks | 0 | - | 4.98 | 54,545 |
| Least Irish U.S. States | 0 | - | 4.49 | 18,375 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 61,525 |
| Countries of Iberia in History with a Map | 0 | - | 4.88 | 42,276 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,733 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,952 |
| Commonwealth of Nations Countries | 0 | - | 4.95 | 238,063 |
| Vatican City Country Quiz | 0 | - | 4.53 | 44,589 |
| Most-Visited Countries by Popes | 0 | - | 4.56 | 84,073 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 70,394 |
| The Persian Gulf War | 0 | - | 4.02 | 8,474 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,973 |
| Countries Bordering China Since 1914 | 0 | - | 4.92 | 95,754 |
| All Modern-Day Countries Ever Controlled by Chinese People | 0 | - | 4.82 | 55,089 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 89,800 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 81,591 |
| South America Flags Map Quiz | 0 | - | 4.95 | 88,698 |
| Rivers of the United States | 0 | - | 4.93 | 66,564 |
| Names of Generations | 0 | - | 4.09 | 45,412 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 118,563 |
| American Founding Fathers | 0 | - | 4.42 | 23,264 |
| Countries Closest to Alaska | 0 | - | 4.93 | 124,939 |
| Top 10 Los Angeles Lakers of All-Time | 0 | - | 4.24 | 47,131 |
| History of Florida | 0 | - | 4.45 | 9,866 |
| Hawaiian Islands | 0 | - | 4.83 | 42,877 |
| Countries Closest to Maine | 0 | - | 4.85 | 67,479 |
| New York Yankees Trivia | 0 | - | 4.29 | 7,252 |
| History of Texas | 0 | - | 4.43 | 14,678 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,470 |
| American History Quotes #1 | 0 | - | 4.37 | 96,170 |
| People on Money - United States | 0 | - | 4.31 | 63,411 |
| American History Quotes #2 | 0 | - | 4.38 | 41,486 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,566 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,179 |
| Events in U.S. History | 0 | - | 4.41 | 28,786 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,177 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,767 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,318 |
| U.S. State Flags | 0 | - | 4.89 | 172,251 |
| U.S. States that Border Canada | 0 | - | 4.91 | 186,260 |
| U.S. States by Church Attendance | 0 | - | 4.59 | 32,532 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 210,236 |
| Great Plains States and Provinces on a Map | 0 | - | 4.95 | 49,973 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 125,708 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 126,326 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 92,679 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.83 | 62,152 |
| U.S. States that Start with M - Shape Quiz | 0 | - | 4.94 | 58,361 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 162,096 |
| All Modern-Day Countries Ever Controlled by French People | 0 | - | 4.99 | 58,399 |
| Biggest Roman Empire Countries | 0 | - | 4.87 | 102,205 |
| Ultimate Harry Potter Name Game | 0 | - | 4.94 | 494,418 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 83,255 |
