| U.S. Presidents Quiz | 0 | - | 5.00 | 3,699,284 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 191,833 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 108,741 |
| U.S. Presidents by Event | 0 | - | 4.58 | 34,507 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 93,816 |
| Presidential Middle Names | 0 | - | 4.41 | 60,271 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,356 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,599 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,436 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,994 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 70,026 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 381,657 |
| U.S. Presidents Who Added the Most Territory | 0 | - | 4.66 | 14,109 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,277 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,260 |
| First Ladies of the United States | 0 | - | 4.28 | 85,649 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,228 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 77,100 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,201 |
| Add a Letter - Make a U.S. President | 0 | - | 4.57 | 23,965 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,830 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,957 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 426,539 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,900 |
| U.S. Presidents by Picture - Multiple Choice | 0 | - | 4.50 | 28,844 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 28,639 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,733 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,652 |
| 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 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,310 |
| The George Washington Presidency | 0 | - | 4.03 | 14,548 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,935 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,324 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,678 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 304,978 |
| Vietnam War Countries | 0 | - | 4.82 | 94,228 |
| George Washington... or George W. Bush? | 0 | - | 4.16 | 12,266 |
| U.S. President Scramble | 0 | - | 4.40 | 116,785 |
| U.S. Presidents True or False | 0 | - | 3.96 | 15,601 |
| The Kennedy Family | 0 | - | 3.90 | 14,071 |
| U.S. Senators by State | 0 | - | 4.44 | 39,960 |
| Presidents that Beat Thomas Jefferson | 0 | - | 4.49 | 24,947 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,501 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,194 |
| The John F. Kennedy Presidency | 0 | - | 4.47 | 43,748 |
| The American Revolution | 0 | - | 4.52 | 54,257 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,811 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 129,274 |
| Mississippi River States Empty Map Quiz | 0 | - | 4.82 | 55,965 |
| Win the U.S. Presidential Election | 0 | - | 4.78 | 627,778 |
| The Jimmy Carter Presidency | 0 | - | 4.41 | 19,138 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 20,061 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,682 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,189 |
| United States Map Quiz | 0 | - | 4.98 | 4,158,745 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,581 |
| Random U.S. Presidents by Picture | 0 | - | 4.40 | 66,251 |
| The Barack Obama Presidency | 0 | - | 4.13 | 25,402 |
| Harvard University | 0 | - | 4.15 | 8,298 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 88,946 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,621 |
| The Iraq War | 0 | - | 4.47 | 15,655 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,737 |
| Rust Belt Cities Map Quiz | 0 | - | 4.57 | 35,105 |
| Top 10 U.S. States by Republican Party Support | 0 | - | 4.44 | 75,517 |
| Top 10 U.S. States by Democratic Party Support | 0 | - | 4.63 | 81,347 |
| Top 10 U.S. Swing States in the 2024 Election | 0 | - | 4.51 | 75,199 |
| Presidential Actors | 0 | - | 4.36 | 19,175 |
| The Bill Clinton Presidency | 0 | - | 4.24 | 31,461 |
| The George H. W. Bush Presidency | 0 | - | 4.36 | 21,497 |
| The Ronald Reagan Presidency | 0 | - | 4.26 | 24,826 |
| The Richard Nixon Presidency | 0 | - | 4.05 | 22,021 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 69,253 |
| U.S. States Closest to Moscow | 0 | - | 4.50 | 48,058 |
| Countries of the Soviet Union | 0 | - | 4.98 | 194,611 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,752 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,875 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,485 |
| Name the U.S. National Parks | 0 | - | 4.86 | 59,957 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,482 |
| Total United States Immigration by Country | 0 | - | 4.91 | 111,663 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,480 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 174,521 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 244,088 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,883 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 74,079 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,238 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 39,947 |
| US States Quiz | 0 | - | 5.00 | 16,877,996 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 367,084 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,416 |
| Countries of Europe in 1848 | 0 | - | 4.99 | 81,986 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,709 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,032 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,903 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 144,649 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 116,011 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,637 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 81,280 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,177 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 332,086 |
| Pixelated United States Map | 0 | - | 4.87 | 94,280 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 109,696 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 91,777 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 146,457 |
| Countries that Beat the United States | 0 | - | 4.93 | 167,477 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,077 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,811 |
| George Bush... or George Bush | 0 | - | 3.98 | 8,204 |
| American Revolution Decoder | 0 | - | 4.10 | 20,957 |
| California A-Z | 0 | - | 4.49 | 28,789 |
| Las Vegas Casinos | 0 | - | 4.13 | 38,067 |
| Six Flags Over Texas | 0 | - | 4.78 | 63,367 |
| U.S. History for Dummies | 0 | - | 4.47 | 83,067 |
| The Most Recent... United States | 0 | - | 4.45 | 18,451 |
| The American Civil War | 0 | - | 4.62 | 52,423 |
| U.S. Civil War Decoder | 0 | - | 4.14 | 25,272 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 117,881 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 506,664 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 111,438 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 113,449 |
| U.S. States with Short Names | 0 | - | 4.91 | 149,023 |
| U.S. States that Start with M | 0 | - | 4.93 | 187,310 |
| U.S. States By Population | 0 | - | 4.92 | 153,554 |
| U.S. States that Start with N | 0 | - | 4.95 | 171,463 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,445 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 48,624 |
| US States with an Empty Map | 0 | - | 5.00 | 624,712 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 82,525 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,315 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,214 |
| Most Common Immigrant Origin by U.S. State | 0 | - | 4.90 | 66,702 |
| Draw All US State Borders | 0 | - | 4.99 | 137,624 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 65,628 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 159,973 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 177,718 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 125,196 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,509 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 86,232 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,772 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,480 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.85 | 67,522 |
| Merged U.S. States | 0 | - | 4.37 | 44,168 |
| Draw All US State Borders - Extreme | 0 | - | 4.99 | 78,538 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 96,062 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 133,226 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 165,394 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 103,798 |
| All Modern-Day Countries Ever Controlled by Greeks | 0 | - | 4.98 | 54,157 |
| Least Irish U.S. States | 0 | - | 4.49 | 18,313 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 61,130 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,875 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,292 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,551 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 237,428 |
| Vatican City Country Quiz | 0 | - | 4.53 | 44,369 |
| Most-Visited Countries by Popes | 0 | - | 4.56 | 83,738 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 69,911 |
| The Persian Gulf War | 0 | - | 4.02 | 8,449 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,673 |
| Countries Bordering China Since 1914 | 0 | - | 4.93 | 95,251 |
| All Modern-Day Countries Ever Controlled by Chinese People | 0 | - | 4.82 | 54,822 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 89,292 |
| South America Flags Map Quiz | 0 | - | 4.95 | 87,939 |
| Rivers of the United States | 0 | - | 4.93 | 66,209 |
| Names of Generations | 0 | - | 4.09 | 44,933 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 118,182 |
| American Founding Fathers | 0 | - | 4.42 | 23,226 |
| Countries Closest to Alaska | 0 | - | 4.93 | 124,366 |
| Top 10 Los Angeles Lakers of All-Time | 0 | - | 4.24 | 46,916 |
| History of Florida | 0 | - | 4.45 | 9,826 |
| Hawaiian Islands | 0 | - | 4.83 | 42,719 |
| Countries Closest to Maine | 0 | - | 4.85 | 67,117 |
| New York Yankees Trivia | 0 | - | 4.29 | 7,212 |
| History of Texas | 0 | - | 4.43 | 14,628 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,322 |
| American History Quotes #1 | 0 | - | 4.37 | 96,033 |
| People on Money - United States | 0 | - | 4.31 | 63,348 |
| American History Quotes #2 | 0 | - | 4.38 | 41,404 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,468 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,060 |
| Events in U.S. History | 0 | - | 4.41 | 28,673 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,114 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,736 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,244 |
| U.S. State Flags | 0 | - | 4.89 | 170,524 |
| U.S. States that Border Canada | 0 | - | 4.91 | 184,969 |
| U.S. States by Church Attendance | 0 | - | 4.59 | 32,426 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 208,973 |
| Great Plains States and Provinces on a Map | 0 | - | 4.95 | 49,484 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 124,660 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 125,669 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 92,076 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,911 |
| U.S. States that Start with M - Shape Quiz | 0 | - | 4.94 | 58,134 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 161,505 |
| All Modern-Day Countries Ever Controlled by French People | 0 | - | 4.99 | 58,094 |
| Biggest Roman Empire Countries | 0 | - | 4.87 | 101,887 |
