| U.S. Presidents Quiz | 0 | - | 5.00 | 3,697,879 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 191,761 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 108,712 |
| U.S. Presidents by Event | 0 | - | 4.58 | 34,468 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 93,783 |
| Presidential Middle Names | 0 | - | 4.41 | 60,235 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,324 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,593 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,428 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,983 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 70,001 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 381,537 |
| U.S. Presidents Who Added the Most Territory | 0 | - | 4.66 | 14,099 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,249 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,256 |
| First Ladies of the United States | 0 | - | 4.28 | 85,633 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,225 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 77,091 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,190 |
| Add a Letter - Make a U.S. President | 0 | - | 4.57 | 23,964 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,827 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,953 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 426,414 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,885 |
| U.S. Presidents by Picture - Multiple Choice | 0 | - | 4.50 | 28,838 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 28,635 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,729 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,649 |
| The John Adams Presidency | 0 | - | 4.12 | 8,747 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,743 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,852 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,288 |
| The George Washington Presidency | 0 | - | 4.03 | 14,545 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,934 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,319 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,674 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 304,921 |
| Vietnam War Countries | 0 | - | 4.82 | 94,211 |
| George Washington... or George W. Bush? | 0 | - | 4.16 | 12,265 |
| U.S. President Scramble | 0 | - | 4.40 | 116,762 |
| 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 | 39,954 |
| Presidents that Beat Thomas Jefferson | 0 | - | 4.49 | 24,945 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,497 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,191 |
| The John F. Kennedy Presidency | 0 | - | 4.47 | 43,736 |
| The American Revolution | 0 | - | 4.52 | 54,253 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,773 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 129,256 |
| Mississippi River States Empty Map Quiz | 0 | - | 4.81 | 55,950 |
| Win the U.S. Presidential Election | 0 | - | 4.78 | 627,446 |
| The Jimmy Carter Presidency | 0 | - | 4.41 | 19,136 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 20,057 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,670 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,185 |
| United States Map Quiz | 0 | - | 4.98 | 4,158,123 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,576 |
| Random U.S. Presidents by Picture | 0 | - | 4.40 | 66,232 |
| The Barack Obama Presidency | 0 | - | 4.13 | 25,395 |
| Harvard University | 0 | - | 4.15 | 8,297 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 88,912 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,608 |
| The Iraq War | 0 | - | 4.47 | 15,653 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,724 |
| Rust Belt Cities Map Quiz | 0 | - | 4.57 | 35,086 |
| Top 10 U.S. States by Republican Party Support | 0 | - | 4.44 | 75,509 |
| Top 10 U.S. States by Democratic Party Support | 0 | - | 4.63 | 81,325 |
| Top 10 U.S. Swing States in the 2024 Election | 0 | - | 4.51 | 75,189 |
| Presidential Actors | 0 | - | 4.36 | 19,171 |
| The Bill Clinton Presidency | 0 | - | 4.24 | 31,458 |
| The George H. W. Bush Presidency | 0 | - | 4.36 | 21,495 |
| The Ronald Reagan Presidency | 0 | - | 4.26 | 24,823 |
| The Richard Nixon Presidency | 0 | - | 4.05 | 22,018 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 69,161 |
| U.S. States Closest to Moscow | 0 | - | 4.50 | 48,047 |
| Countries of the Soviet Union | 0 | - | 4.98 | 194,572 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,726 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,847 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,472 |
| Name the U.S. National Parks | 0 | - | 4.86 | 59,934 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,439 |
| Total United States Immigration by Country | 0 | - | 4.91 | 111,620 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,457 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 174,468 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 243,967 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,869 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 74,004 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,211 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 39,929 |
| US States Quiz | 0 | - | 5.00 | 16,871,317 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 366,993 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,195 |
| Countries of Europe in 1848 | 0 | - | 4.99 | 81,635 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,639 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,979 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,857 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 144,597 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 115,966 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,574 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 81,252 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,168 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 331,901 |
| Pixelated United States Map | 0 | - | 4.87 | 94,253 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 109,651 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 91,755 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 146,427 |
| Countries that Beat the United States | 0 | - | 4.93 | 167,419 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,072 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,790 |
| George Bush... or George Bush | 0 | - | 3.98 | 8,204 |
| American Revolution Decoder | 0 | - | 4.10 | 20,956 |
| California A-Z | 0 | - | 4.49 | 28,788 |
| Las Vegas Casinos | 0 | - | 4.13 | 38,062 |
| Six Flags Over Texas | 0 | - | 4.78 | 63,351 |
| U.S. History for Dummies | 0 | - | 4.47 | 83,048 |
| The Most Recent... United States | 0 | - | 4.45 | 18,443 |
| The American Civil War | 0 | - | 4.62 | 52,415 |
| U.S. Civil War Decoder | 0 | - | 4.14 | 25,268 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 117,847 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 506,468 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 111,394 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 113,412 |
| U.S. States with Short Names | 0 | - | 4.91 | 148,973 |
| U.S. States that Start with M | 0 | - | 4.93 | 187,255 |
| U.S. States By Population | 0 | - | 4.92 | 153,524 |
| U.S. States that Start with N | 0 | - | 4.95 | 171,427 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,431 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 48,581 |
| US States with an Empty Map | 0 | - | 5.00 | 624,442 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 82,502 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,284 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,203 |
| Draw All US State Borders | 0 | - | 4.99 | 137,473 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 65,603 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 159,949 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 177,691 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 125,168 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,494 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 86,208 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,750 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,462 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.85 | 67,503 |
| Merged U.S. States | 0 | - | 4.37 | 44,160 |
| Draw All US State Borders - Extreme | 0 | - | 4.99 | 78,484 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 96,001 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 133,167 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 165,363 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 103,748 |
| All Modern-Day Countries Ever Controlled by Greeks | 0 | - | 4.98 | 54,122 |
| Least Irish U.S. States | 0 | - | 4.49 | 18,312 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 61,100 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,843 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,264 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,526 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 237,385 |
| Vatican City Country Quiz | 0 | - | 4.53 | 44,353 |
| Most-Visited Countries by Popes | 0 | - | 4.56 | 83,716 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 69,881 |
| The Persian Gulf War | 0 | - | 4.02 | 8,449 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,651 |
| Countries Bordering China Since 1914 | 0 | - | 4.93 | 95,236 |
| All Modern-Day Countries Ever Controlled by Chinese People | 0 | - | 4.82 | 54,802 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 89,261 |
| South America Flags Map Quiz | 0 | - | 4.95 | 87,887 |
| Rivers of the United States | 0 | - | 4.93 | 66,187 |
| Names of Generations | 0 | - | 4.09 | 44,862 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 118,146 |
| American Founding Fathers | 0 | - | 4.42 | 23,223 |
| Countries Closest to Alaska | 0 | - | 4.93 | 124,315 |
| Top 10 Los Angeles Lakers of All-Time | 0 | - | 4.24 | 46,905 |
| History of Florida | 0 | - | 4.45 | 9,824 |
| Hawaiian Islands | 0 | - | 4.83 | 42,704 |
| Countries Closest to Maine | 0 | - | 4.85 | 67,098 |
| New York Yankees Trivia | 0 | - | 4.29 | 7,208 |
| History of Texas | 0 | - | 4.43 | 14,624 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,317 |
| American History Quotes #1 | 0 | - | 4.37 | 96,022 |
| People on Money - United States | 0 | - | 4.31 | 63,343 |
| American History Quotes #2 | 0 | - | 4.38 | 41,400 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,454 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,045 |
| Events in U.S. History | 0 | - | 4.41 | 28,667 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,109 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,730 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,237 |
| U.S. State Flags | 0 | - | 4.89 | 170,372 |
| U.S. States that Border Canada | 0 | - | 4.91 | 184,863 |
| U.S. States by Church Attendance | 0 | - | 4.59 | 32,423 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 208,849 |
| Great Plains States and Provinces on a Map | 0 | - | 4.95 | 49,423 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 124,635 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 125,630 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 91,980 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,896 |
| U.S. States that Start with M - Shape Quiz | 0 | - | 4.94 | 58,113 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 161,460 |
| All Modern-Day Countries Ever Controlled by French People | 0 | - | 4.99 | 58,072 |
| Biggest Roman Empire Countries | 0 | - | 4.87 | 101,867 |
| Ultimate Harry Potter Name Game | 0 | - | 4.94 | 493,332 |
