| U.S. Presidents Quiz | 0 | - | 5.00 | 3,662,384 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 190,193 |
| U.S. Vice Presidents | 0 | - | 4.41 | 135,269 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 108,081 |
| U.S. Presidents by Event | 0 | - | 4.58 | 33,674 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 93,126 |
| Presidential Middle Names | 0 | - | 4.41 | 59,792 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 52,835 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 93,943 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,213 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,779 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 69,533 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 379,900 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,175 |
| First Ladies of the United States | 0 | - | 4.28 | 85,304 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,127 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 76,467 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,032 |
| Add a Letter - Make a U.S. President | 0 | - | 4.61 | 23,850 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,707 |
| U.S. Presidents by Picture - Multiple Choice | 0 | - | 4.49 | 28,637 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,829 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 424,228 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,729 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 28,502 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,667 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,531 |
| The John Adams Presidency | 0 | - | 4.12 | 8,684 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,692 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,789 |
| Play-Doh Presidents | 0 | - | 5.00 | 81,774 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 303,717 |
| The George Washington Presidency | 0 | - | 4.03 | 14,483 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,887 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,241 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,622 |
| Vietnam War Countries | 0 | - | 4.83 | 93,725 |
| George Washington... or George W. Bush? | 0 | - | 4.16 | 12,225 |
| U.S. President Scramble | 0 | - | 4.40 | 116,294 |
| U.S. Presidents True or False | 0 | - | 3.96 | 15,540 |
| The Kennedy Family | 0 | - | 3.90 | 14,029 |
| U.S. Senators by State | 0 | - | 4.45 | 39,788 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,376 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,098 |
| The John F. Kennedy Presidency | 0 | - | 4.47 | 43,519 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 128,768 |
| Mississippi River States Empty Map Quiz | 0 | - | 4.81 | 55,662 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 19,966 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,045 |
| The American Revolution | 0 | - | 4.52 | 54,100 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,461 |
| United States Map Quiz | 0 | - | 4.98 | 4,144,476 |
| Win the U.S. Presidential Election | 0 | - | 4.80 | 619,997 |
| The Jimmy Carter Presidency | 0 | - | 4.41 | 19,041 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,495 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,387 |
| The Barack Obama Presidency | 0 | - | 4.16 | 25,272 |
| Harvard University | 0 | - | 4.15 | 8,269 |
| Rust Belt Cities Map Quiz | 0 | - | 4.57 | 34,923 |
| Top 10 U.S. States by Republican Party Support | 0 | - | 4.44 | 75,191 |
| Top 10 U.S. States by Democratic Party Support | 0 | - | 4.63 | 80,962 |
| Presidential Actors | 0 | - | 4.36 | 19,082 |
| Random U.S. Presidents by Picture | 0 | - | 4.39 | 65,898 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 88,232 |
| Countries of the Soviet Union | 0 | - | 4.98 | 193,999 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,349 |
| The Iraq War | 0 | - | 4.47 | 15,574 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,047 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,509 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,432 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 74,986 |
| Top 10 U.S. Swing States in the 2024 Election | 0 | - | 4.51 | 74,970 |
| The Bill Clinton Presidency | 0 | - | 4.22 | 31,367 |
| The George H. W. Bush Presidency | 0 | - | 4.36 | 21,428 |
| The Ronald Reagan Presidency | 0 | - | 4.26 | 24,732 |
| The Richard Nixon Presidency | 0 | - | 4.05 | 21,933 |
| George Bush... or George Bush | 0 | - | 3.98 | 8,183 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 73,192 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 39,585 |
| US States Quiz | 0 | - | 5.00 | 16,732,221 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 67,882 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,161 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,614 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,636 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,286 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,181 |
| U.S. States Closest to Moscow | 0 | - | 4.50 | 47,840 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,330 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 143,438 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,077 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 80,793 |
| Name the U.S. National Parks | 0 | - | 4.86 | 59,326 |
| Total United States Immigration by Country | 0 | - | 4.91 | 110,793 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 173,406 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 241,432 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 328,789 |
| Pixelated United States Map | 0 | - | 4.89 | 93,629 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 108,677 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 90,994 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 28,907 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,580 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.49 | 11,677 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.84 | 65,741 |
| Las Vegas Casinos | 0 | - | 4.12 | 37,984 |
| Six Flags Over Texas | 0 | - | 4.78 | 63,058 |
| U.S. History for Dummies | 0 | - | 4.47 | 82,581 |
| U.S. Civil War Decoder | 0 | - | 4.14 | 25,197 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 116,921 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 110,536 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 112,590 |
| U.S. States with Short Names | 0 | - | 4.91 | 147,882 |
| U.S. States that Start with M | 0 | - | 4.93 | 186,135 |
| U.S. States By Population | 0 | - | 4.92 | 152,519 |
| U.S. States that Start with N | 0 | - | 4.95 | 170,582 |
| U.S. States with Longest Names | 0 | - | 4.84 | 43,981 |
| US States with an Empty Map | 0 | - | 5.00 | 619,811 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 81,988 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 365,568 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 87,715 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 63,831 |
| The Only Remaining U.S. State . . . | 0 | - | 4.92 | 65,006 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 159,217 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 177,170 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 124,598 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,138 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 85,746 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.84 | 66,937 |
| All Modern-Day Countries Ever Controlled by Greeks | 0 | - | 4.98 | 53,573 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 60,485 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 115,151 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,222 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 85,639 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,546 |
| Vatican City Country Quiz | 0 | - | 4.53 | 44,075 |
| The Persian Gulf War | 0 | - | 4.02 | 8,414 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,347 |
| All Modern-Day Countries Ever Controlled by Chinese People | 0 | - | 4.82 | 54,380 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 38,856 |
| Rivers of the United States | 0 | - | 4.93 | 65,629 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 145,588 |
| Countries that Beat the United States | 0 | - | 4.93 | 165,800 |
| American Founding Fathers | 0 | - | 4.41 | 23,085 |
| American Revolution Decoder | 0 | - | 4.10 | 20,888 |
| Countries Closest to Alaska | 0 | - | 4.93 | 123,501 |
| California A-Z | 0 | - | 4.49 | 28,727 |
| Top 10 Los Angeles Lakers of All-Time | 0 | - | 4.24 | 46,577 |
| Countries Closest to Maine | 0 | - | 4.84 | 66,563 |
| People on Money - United States | 0 | - | 4.31 | 63,231 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,284 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 44,762 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,021 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,659 |
| The Most Recent... United States | 0 | - | 4.45 | 18,319 |
| The American Civil War | 0 | - | 4.62 | 52,201 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 502,773 |
| U.S. States by Church Attendance | 0 | - | 4.59 | 32,292 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 47,754 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 207,065 |
| Great Plains States and Provinces on a Map | 0 | - | 4.95 | 48,727 |
| Draw All US State Borders | 0 | - | 4.99 | 134,240 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 124,027 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 124,845 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 91,244 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,192 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,029 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,612 |
| Merged U.S. States | 0 | - | 4.36 | 43,916 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 94,950 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 132,159 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 164,657 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 102,900 |
| All Modern-Day Countries Ever Controlled by French People | 0 | - | 4.99 | 57,633 |
| Least Irish U.S. States | 0 | - | 4.49 | 18,236 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 97,945 |
| Ultimate Harry Potter Name Game | 0 | - | 4.94 | 491,751 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 236,580 |
| Most-Visited Countries by Popes | 0 | - | 4.55 | 83,280 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 69,331 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 81,981 |
| Countries Bordering China Since 1914 | 0 | - | 4.93 | 94,823 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 88,587 |
| Colonies of Africa with a Map | 0 | - | 4.77 | 54,042 |
| Random American Countries on a Map | 0 | - | 4.96 | 98,785 |
| South America Flags Map Quiz | 0 | - | 4.95 | 86,870 |
| Most-Spoken Languages of the United States | 0 | - | 4.52 | 217,281 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 117,580 |
| Most Common High School Mascots | 0 | - | 4.47 | 31,881 |
| History of Florida | 0 | - | 4.45 | 9,775 |
| The Life of Martin Luther King Jr. | 0 | - | 4.73 | 11,069 |
| Hawaiian Islands | 0 | - | 4.83 | 42,490 |
| Boston Red Sox Trivia | 0 | - | 4.09 | 7,511 |
| Top 10 Boston Celtics Players | 0 | - | 4.05 | 23,640 |
| Boston Celtics Trivia | 0 | - | 4.09 | 14,758 |
| Top 15 New York Yankees of All-Time | 0 | - | 4.02 | 25,675 |
| New York Yankees Trivia | 0 | - | 4.29 | 7,134 |
| History of Texas | 0 | - | 4.43 | 14,564 |
| History of Pennsylvania | 0 | - | 4.16 | 7,096 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,136 |
| History of Virginia | 0 | - | 4.31 | 11,562 |
| American History Quotes #1 | 0 | - | 4.37 | 95,729 |
