| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 129,130 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,688,181 |
| Vietnam War Countries | 0 | - | 4.82 | 94,081 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 425,875 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 381,095 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 191,347 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,154 |
| American Revolution Decoder | 0 | - | 4.10 | 20,936 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 144,290 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 304,625 |
| Random U.S. States on a Map | 0 | - | 4.96 | 625,054 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,537 |
| Pixelated United States Map | 0 | - | 4.87 | 94,075 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 108,528 |
| U.S. Presidents by Event | 0 | - | 4.58 | 34,257 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 93,594 |
| Presidential Middle Names | 0 | - | 4.41 | 60,105 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,185 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,438 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,356 |
| Most-Visited Countries by U.S. Presidents | 0 | - | 4.96 | 193,374 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,512 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,938 |
| U.S. President Scramble | 0 | - | 4.40 | 116,635 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 69,862 |
| The John F. Kennedy Presidency | 0 | - | 4.47 | 43,673 |
| Biggest Cities in the Confederate States in 1860 | 0 | - | 4.41 | 23,616 |
| Random Sequential U.S. States on a Map | 0 | - | 4.99 | 234,148 |
| U.S. Map with Random Merged States | 0 | - | 4.94 | 301,977 |
| Countries of the German Empire | 0 | - | 4.51 | 37,870 |
| United States Map Quiz | 0 | - | 4.98 | 4,153,995 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,053 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,241 |
| First Ladies of the United States | 0 | - | 4.28 | 85,535 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,927 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,201 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 76,928 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,159 |
| Add a Letter - Make a U.S. President | 0 | - | 4.57 | 23,934 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,795 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 161,249 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 88,748 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,655 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,470 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,167 |
| The Jimmy Carter Presidency | 0 | - | 4.41 | 19,116 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,630 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,147 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,846 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 68,801 |
| Countries of Europe After World War II | 0 | - | 4.99 | 188,050 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 156,240 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 104,170 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,612 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,359 |
| Name the U.S. National Parks | 0 | - | 4.86 | 59,789 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,170 |
| Total United States Immigration by Country | 0 | - | 4.91 | 111,326 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,325 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 174,196 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 243,220 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 331,075 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,798 |
| Win the U.S. Presidential Election | 0 | - | 4.78 | 625,331 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 28,601 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 20,033 |
| The George Washington Presidency | 0 | - | 4.03 | 14,535 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,714 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,617 |
| The John Adams Presidency | 0 | - | 4.12 | 8,734 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,917 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,727 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,300 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,658 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,835 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 73,740 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,076 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 39,819 |
| US States Quiz | 0 | - | 5.00 | 16,831,832 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 366,595 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,888 |
| Countries of Europe in 1848 | 0 | - | 4.99 | 76,127 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,288 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,705 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,613 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 115,718 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,237 |
| Flags of Countries of the World in 1910 | 0 | - | 4.96 | 78,664 |
| George Washington... or George W. Bush? | 0 | - | 4.16 | 12,258 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 81,146 |
| Every African Country Shape | 0 | - | 4.90 | 87,019 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,106 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 109,348 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 91,514 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 146,139 |
| Countries that Beat the United States | 0 | - | 4.93 | 166,543 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,502 |
| Presidential Actors | 0 | - | 4.36 | 19,153 |
| The Bill Clinton Presidency | 0 | - | 4.24 | 31,437 |
| The George H. W. Bush Presidency | 0 | - | 4.36 | 21,476 |
| The Ronald Reagan Presidency | 0 | - | 4.26 | 24,803 |
| The Richard Nixon Presidency | 0 | - | 4.05 | 22,001 |
| The Barack Obama Presidency | 0 | - | 4.16 | 25,368 |
| Six Flags Over Texas | 0 | - | 4.78 | 63,272 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,089 |
| U.S. History for Dummies | 0 | - | 4.47 | 82,928 |
| The American Civil War | 0 | - | 4.62 | 52,372 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 117,641 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 505,466 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 111,166 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 113,206 |
| U.S. States with Short Names | 0 | - | 4.91 | 148,693 |
| U.S. States that Start with M | 0 | - | 4.93 | 186,963 |
| U.S. States By Population | 0 | - | 4.92 | 153,008 |
| U.S. States that Start with N | 0 | - | 4.95 | 171,188 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,314 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 48,387 |
| US States with an Empty Map | 0 | - | 5.00 | 623,274 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 82,378 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,131 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,106 |
| Draw All US State Borders | 0 | - | 4.99 | 136,603 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 65,464 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 159,774 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 177,521 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 125,044 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,425 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 86,114 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,599 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,336 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.85 | 67,373 |
| Every European Country Shape | 0 | - | 4.96 | 201,300 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 95,730 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 132,899 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 165,165 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 103,484 |
| Countries of the Italian Empire | 0 | - | 4.21 | 27,661 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,413 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 60,923 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,524 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,100 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,375 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 237,181 |
| Every Asian Country Shape | 0 | - | 4.95 | 87,561 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 69,694 |
| The Iraq War | 0 | - | 4.47 | 15,637 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,560 |
| Countries Bordering China Since 1914 | 0 | - | 4.93 | 95,102 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 89,060 |
| Former Country Flag-Shape Picture Quiz | 0 | - | 4.98 | 89,426 |
| Countries in an Egg of the World Map | 0 | - | 4.91 | 64,286 |
| Africa Flags Map Quiz | 0 | - | 4.95 | 36,312 |
| Random African Countries on a Map | 0 | - | 4.99 | 295,343 |
| Africa Map with Random Merged Countries | 0 | - | 4.95 | 73,352 |
| Random African Flag to Country | 0 | - | 4.88 | 74,675 |
| Eastern Africa Map Quiz | 0 | - | 4.98 | 78,750 |
| Random American Countries on a Map | 0 | - | 4.96 | 99,296 |
| South America Flags Map Quiz | 0 | - | 4.95 | 87,599 |
| Rivers of the United States | 0 | - | 4.93 | 66,074 |
| Names of Generations | 0 | - | 4.10 | 44,164 |
| U.S. Cities by Picture #1 | 0 | - | 4.36 | 34,504 |
| Cities by Picture #2 | 0 | - | 4.19 | 35,082 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 117,985 |
| Topological Map of the USA Quiz | 0 | - | 4.49 | 29,057 |
| U.S. Senators by State | 0 | - | 4.45 | 39,907 |
| Top 10 U.S. States by Republican Party Support | 0 | - | 4.44 | 75,426 |
| Top 10 U.S. States by Democratic Party Support | 0 | - | 4.63 | 81,221 |
| Top 10 U.S. Swing States in the 2024 Election | 0 | - | 4.51 | 75,134 |
| American Founding Fathers | 0 | - | 4.42 | 23,201 |
| The American Revolution | 0 | - | 4.52 | 54,213 |
| Countries Closest to Alaska | 0 | - | 4.93 | 124,103 |
| Stephen Curry Quiz | 0 | - | 4.37 | 66,796 |
| History of Florida | 0 | - | 4.45 | 9,810 |
| The Life of Martin Luther King Jr. | 0 | - | 4.73 | 11,098 |
| Hawaiian Islands | 0 | - | 4.83 | 42,651 |
| Countries Closest to Maine | 0 | - | 4.85 | 66,972 |
| Harvard University | 0 | - | 4.15 | 8,290 |
| History of Texas | 0 | - | 4.43 | 14,605 |
| LeBron James Trivia | 0 | - | 4.01 | 170,639 |
| LeBron... or Kobe? | 0 | - | 4.04 | 69,760 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,272 |
| Washington D.C. by Picture | 0 | - | 4.49 | 26,735 |
| American History Quotes #1 | 0 | - | 4.37 | 95,959 |
| People on Money - United States | 0 | - | 4.31 | 63,322 |
| American History Quotes #2 | 0 | - | 4.38 | 41,372 |
| Old West History | 0 | - | 4.33 | 15,258 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,406 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 44,989 |
| Life of Benjamin Franklin | 0 | - | 4.24 | 6,517 |
| American Revolution - Multiple Choice | 0 | - | 4.34 | 19,913 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,707 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,215 |
| Fifty US States in One Minute | 0 | - | 4.61 | 3,533,801 |
| U.S. State Flags | 0 | - | 4.89 | 169,731 |
| U.S. States that Border Canada | 0 | - | 4.91 | 184,351 |
| U.S. States by Church Attendance | 0 | - | 4.59 | 32,388 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 208,430 |
| Category Elimination - U.S. States #1 | 0 | - | 4.88 | 220,334 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 133,847 |
| Great Plains States and Provinces on a Map | 0 | - | 4.95 | 49,228 |
