| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 128,922 |
| Vietnam War Countries | 0 | - | 4.83 | 93,890 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,673,753 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 424,976 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 160,927 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 190,678 |
| Play-Doh Presidents | 0 | - | 5.00 | 81,935 |
| Countries of Europe After World War II | 0 | - | 4.99 | 187,660 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 155,881 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,432 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,444 |
| Random U.S. States on a Map | 0 | - | 4.96 | 623,619 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 104,045 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 108,258 |
| U.S. Presidents by Event | 0 | - | 4.58 | 33,926 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 93,323 |
| Presidential Middle Names | 0 | - | 4.41 | 59,924 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,871 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 52,979 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,202 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,856 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,280 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,265 |
| American Founding Fathers | 0 | - | 4.42 | 23,110 |
| American Revolution Decoder | 0 | - | 4.10 | 20,904 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,778 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 143,836 |
| The Iraq War | 0 | - | 4.47 | 15,596 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 304,153 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 69,676 |
| United States Map Quiz | 0 | - | 4.98 | 4,148,376 |
| Arms Exports - United States | 0 | - | 4.75 | 61,924 |
| U.S. Vice Presidents | 0 | - | 4.39 | 135,629 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,198 |
| First Ladies of the United States | 0 | - | 4.28 | 85,373 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,160 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 380,366 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 76,669 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,083 |
| Add a Letter - Make a U.S. President | 0 | - | 4.57 | 23,884 |
| The John F. Kennedy Presidency | 0 | - | 4.47 | 43,583 |
| U.S. Civil War Decoder | 0 | - | 4.14 | 25,225 |
| Category Elimination - U.S. States #1 | 0 | - | 4.88 | 219,516 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 133,235 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,733 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 88,488 |
| The Persian Gulf War | 0 | - | 4.02 | 8,425 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,541 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,129 |
| U.S. President Scramble | 0 | - | 4.40 | 116,461 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,087 |
| U.S. Presidents by Picture - Multiple Choice | 0 | - | 4.49 | 28,699 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,777 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 68,317 |
| Countries of the Soviet Union | 0 | - | 4.98 | 194,206 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,453 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,309 |
| African Countries with the Most Christians | 0 | - | 4.94 | 75,167 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,202 |
| Name the U.S. National Parks | 0 | - | 4.86 | 59,572 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,816 |
| Total United States Immigration by Country | 0 | - | 4.91 | 111,042 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,163 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 173,750 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 242,245 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,680 |
| U.S. Senators by State | 0 | - | 4.45 | 39,845 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 28,546 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 19,981 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,690 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,569 |
| The John Adams Presidency | 0 | - | 4.12 | 8,706 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,712 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,810 |
| The Kennedy Family | 0 | - | 3.90 | 14,045 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 73,455 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 65,902 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 39,689 |
| US States Quiz | 0 | - | 5.00 | 16,778,606 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 366,123 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,523 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,857 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,954 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,487 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,368 |
| Countries of the German Empire | 0 | - | 4.51 | 37,786 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 115,424 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,851 |
| Asian Countries with the Most Christians | 0 | - | 4.85 | 96,700 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 80,965 |
| Biggest Trading Partners – Australia | 0 | - | 4.93 | 61,227 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 38,943 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 329,784 |
| Pixelated United States Map | 0 | - | 4.89 | 93,813 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 109,005 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 91,243 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 145,817 |
| Countries that Beat the United States | 0 | - | 4.93 | 166,130 |
| Win the U.S. Presidential Election | 0 | - | 4.80 | 622,314 |
| Presidential Actors | 0 | - | 4.36 | 19,117 |
| The George Washington Presidency | 0 | - | 4.03 | 14,505 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,903 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,638 |
| The Barack Obama Presidency | 0 | - | 4.16 | 25,319 |
| California A-Z | 0 | - | 4.49 | 28,745 |
| Six Flags Over Texas | 0 | - | 4.78 | 63,152 |
| U.S. History for Dummies | 0 | - | 4.47 | 82,730 |
| The Most Recent... United States | 0 | - | 4.45 | 18,368 |
| The American Civil War | 0 | - | 4.62 | 52,281 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 117,348 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 504,038 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 110,919 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 112,914 |
| U.S. States with Short Names | 0 | - | 4.91 | 148,354 |
| U.S. States that Start with M | 0 | - | 4.93 | 186,583 |
| U.S. States By Population | 0 | - | 4.92 | 152,785 |
| U.S. States that Start with N | 0 | - | 4.95 | 170,885 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,160 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 48,083 |
| US States with an Empty Map | 0 | - | 5.00 | 621,350 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 82,201 |
| States in a Tank of the U.S. Map | 0 | - | 4.47 | 31,132 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 87,952 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 63,975 |
| Draw All US State Borders | 0 | - | 4.99 | 135,307 |
| The Only Remaining U.S. State . . . | 0 | - | 4.92 | 65,255 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 159,529 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 177,372 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 124,859 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,326 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 85,980 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,407 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,200 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.85 | 67,197 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 95,324 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 132,505 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 164,865 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 103,179 |
| All Modern-Day Countries Ever Controlled by Greeks | 0 | - | 4.98 | 53,734 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 60,675 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,341 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 85,843 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,133 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 236,867 |
| Prime Ministers of the UK | 0 | - | 4.96 | 436,623 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 69,499 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,440 |
| Countries Bordering China Since 1914 | 0 | - | 4.93 | 94,942 |
| All Modern-Day Countries Ever Controlled by Chinese People | 0 | - | 4.82 | 54,532 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 88,830 |
| George Washington... or George W. Bush? | 0 | - | 4.16 | 12,235 |
| Rivers of the United States | 0 | - | 4.93 | 65,821 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 117,785 |
| Top 10 U.S. States by Republican Party Support | 0 | - | 4.44 | 75,310 |
| Top 10 U.S. States by Democratic Party Support | 0 | - | 4.63 | 81,086 |
| Top 10 U.S. Swing States in the 2024 Election | 0 | - | 4.51 | 75,047 |
| Movies with America in the Title | 0 | - | 4.17 | 28,736 |
| Countries Closest to Alaska | 0 | - | 4.93 | 123,791 |
| Top 10 Los Angeles Lakers of All-Time | 0 | - | 4.24 | 46,683 |
| History of Florida | 0 | - | 4.45 | 9,791 |
| Hawaiian Islands | 0 | - | 4.83 | 42,564 |
| Countries Closest to Maine | 0 | - | 4.85 | 66,749 |
| Harvard University | 0 | - | 4.15 | 8,280 |
| History of Texas | 0 | - | 4.43 | 14,579 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,206 |
| American History Quotes #1 | 0 | - | 4.37 | 95,823 |
| People on Money - United States | 0 | - | 4.31 | 63,262 |
| American History Quotes #2 | 0 | - | 4.38 | 41,301 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,336 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 44,827 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,046 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,686 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,144 |
| U.S. State Flags | 0 | - | 4.89 | 168,797 |
| U.S. States that Border Canada | 0 | - | 4.91 | 183,644 |
| U.S. States by Church Attendance | 0 | - | 4.59 | 32,345 |
| U.S. States with the Most Billionaires | 0 | - | 4.51 | 50,232 |
| Top U.S. States in Crude Oil Production | 0 | - | 4.51 | 41,040 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 207,717 |
| Great Plains States and Provinces on a Map | 0 | - | 4.95 | 48,982 |
| Least Visited U.S. States by JetPunkers | 0 | - | 4.44 | 70,456 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 124,217 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 125,081 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 91,515 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,689 |
| U.S. States that Start with M - Shape Quiz | 0 | - | 4.94 | 57,866 |
| All Modern-Day Countries Ever Controlled by French People | 0 | - | 4.99 | 57,766 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 71,079 |
| Biggest Roman Empire Countries | 0 | - | 4.87 | 101,601 |
| Biggest Trading Partners - Spain | 0 | - | 4.91 | 53,635 |
| Biggest Trading Partners – United Kingdom | 0 | - | 4.93 | 79,884 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 82,222 |
| Biggest Trading Partners - China | 0 | - | 4.95 | 74,862 |
| Biggest Axis-Controlled Cities | 0 | - | 4.43 | 48,739 |
| Flags of WW1 | 0 | - | 4.60 | 38,158 |
| Colonies of Africa with a Map | 0 | - | 4.78 | 54,190 |
| Random American Countries on a Map | 0 | - | 4.96 | 99,017 |
| Most-Spoken Languages of the United States | 0 | - | 4.52 | 218,155 |
| Territories of the United States | 0 | - | 4.79 | 52,253 |
| Five Biggest Immigrant Groups by Decade in the US | 0 | - | 4.78 | 39,490 |
