| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 129,532 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,718,784 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 104,479 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 427,965 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 383,124 |
| American Revolution Decoder | 0 | - | 4.12 | 20,982 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 145,335 |
| Vietnam War Countries | 0 | - | 4.82 | 94,497 |
| The American Revolution | 0 | - | 4.52 | 54,326 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 162,064 |
| Category Elimination - U.S. States #1 | 0 | - | 4.88 | 222,041 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 135,291 |
| Random U.S. States on a Map | 0 | - | 4.96 | 629,192 |
| Countries of Europe After World War II | 0 | - | 4.99 | 189,093 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 157,197 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,781 |
| Asian Countries with the Shortest Names | 0 | - | 4.97 | 135,881 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 109,182 |
| U.S. Presidents by Event | 0 | - | 4.58 | 35,062 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.62 | 94,417 |
| Presidential Middle Names | 0 | - | 4.41 | 60,602 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,567 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,803 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 35,148 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,570 |
| Most-Visited Countries by U.S. Presidents | 0 | - | 4.96 | 194,213 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,569 |
| Asian Countries with the Most Christians | 0 | - | 4.86 | 97,759 |
| Name a Valid Asian Country | 0 | - | 4.98 | 121,570 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,963 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,334 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 81,575 |
| Countries that Beat the United States | 0 | - | 4.93 | 168,328 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 305,932 |
| The John F. Kennedy Presidency | 0 | - | 4.47 | 43,881 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 509,122 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 210,188 |
| Random Sequential U.S. States on a Map | 0 | - | 4.99 | 235,044 |
| U.S. Map with Random Merged States | 0 | - | 4.94 | 303,484 |
| Countries of the German Empire | 0 | - | 4.51 | 38,112 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 70,376 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 83,239 |
| Countries that Beat Indonesia | 0 | - | 4.86 | 56,330 |
| Biggest Trading Partners - China | 0 | - | 4.95 | 75,409 |
| Countries that Beat China | 0 | - | 4.85 | 116,514 |
| Countries Bordering China Since 1914 | 0 | - | 4.92 | 95,744 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 89,787 |
| United States Map Quiz | 0 | - | 4.98 | 4,167,781 |
| Arms Exports - United States | 0 | - | 4.77 | 62,640 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,775 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,328 |
| U.S. Presidential Running Mates | 0 | - | 4.41 | 28,717 |
| First Ladies of the United States | 0 | - | 4.28 | 85,862 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,281 |
| U.S. Presidents in Order by First Letter | 0 | - | 4.32 | 77,384 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,313 |
| Add a Letter - Make a U.S. President | 0 | - | 4.58 | 24,063 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 89,508 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 439,054 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,451,084 |
| Asia Map Quiz | 0 | - | 4.99 | 923,011 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,912 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,922 |
| Names of Generations | 0 | - | 4.09 | 45,392 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,583 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,256 |
| The Jimmy Carter Presidency | 0 | - | 4.41 | 19,201 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 20,136 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,882 |
| U.S. President Scramble | 0 | - | 4.40 | 117,342 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 193,334 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,302 |
| American History Quotes #1 | 0 | - | 4.37 | 96,168 |
| American History Quotes #2 | 0 | - | 4.38 | 41,484 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,314 |
| US States Quiz | 0 | - | 5.00 | 16,962,004 |
| Fifty US States in One Minute | 0 | - | 4.61 | 3,552,233 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,333,624 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 70,065 |
| Countries of the Soviet Union | 0 | - | 4.98 | 195,382 |
| Soviet Union Country Quiz | 0 | - | 4.91 | 81,030 |
| Flags of Asia Quiz | 0 | - | 4.99 | 618,230 |
| East Asia Cities Map Quiz | 0 | - | 4.96 | 110,615 |
| 10 Biggest Asian Countries by Area | 0 | - | 4.97 | 154,352 |
| 10 Southernmost Countries in Asia | 0 | - | 4.97 | 99,716 |
| 10 Easternmost Countries in Asia | 0 | - | 4.99 | 108,991 |
| Countries of Asia in 1900 | 0 | - | 4.50 | 58,194 |
| Countries of Asia with Two or More Words | 0 | - | 4.96 | 127,569 |
| Asian Countries Ending in "IA" | 0 | - | 4.96 | 108,108 |
| South and Central Asia Map Quiz | 0 | - | 4.94 | 99,687 |
| Middle East Map Quiz | 0 | - | 4.99 | 1,386,215 |
| Countries of the Middle East | 0 | - | 4.96 | 202,265 |
| The Vietnam War | 0 | - | 4.44 | 35,623 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,766 |
| U.S. State Nicknames | 0 | - | 4.47 | 50,668 |
| Name the U.S. National Parks | 0 | - | 4.86 | 60,336 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,604 |
| Total United States Immigration by Country | 0 | - | 4.91 | 112,160 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,805 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 175,286 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 245,784 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 334,550 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 73,049 |
| Win the U.S. Presidential Election | 0 | - | 4.78 | 633,032 |
| Presidential Actors | 0 | - | 4.36 | 19,226 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 24,029 |
| The George Washington Presidency | 0 | - | 4.03 | 14,589 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,764 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,724 |
| The John Adams Presidency | 0 | - | 4.12 | 8,772 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,971 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,760 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,357 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,739 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,898 |
| Cities and Towns of Massachusetts | 0 | - | 4.93 | 74,782 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,595 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 40,172 |
| U.S. States by First Two Letters in 30 Seconds | 0 | - | 4.70 | 1,396,865 |
| States in a Tank of the U.S. Map | 0 | - | 4.47 | 31,406 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 368,256 |
| Colleges by U.S. State - Multiple Choice | 0 | - | 4.57 | 23,107 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,081 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,622 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 263,716 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 115,602 |
| Countries of the Italian Empire | 0 | - | 4.21 | 27,789 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 116,586 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,462 |
| 10 Asian Countries with the Most Tourists | 0 | - | 4.89 | 106,595 |
| Asian Last Names in the United States | 0 | - | 4.43 | 46,919 |
| Top 10 Coldest Asian Countries | 0 | - | 4.95 | 123,631 |
| "Stan" Countries - Map Quiz | 0 | - | 4.98 | 137,030 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.75 | 60,151 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.87 | 136,554 |
| Pixelated Asia Map | 0 | - | 4.90 | 73,638 |
| Monarchies of Asia | 0 | - | 4.97 | 71,384 |
| Asian Country Superlatives | 0 | - | 4.84 | 81,186 |
| Countries Closest to the Persian Gulf | 0 | - | 4.93 | 83,617 |
| Qatar Country Quiz | 0 | - | 4.86 | 31,655 |
| The Iraq War | 0 | - | 4.47 | 15,691 |
| Jordan Country Quiz | 0 | - | 4.86 | 32,007 |
| Countries with the Most Arabic Speakers | 0 | - | 4.92 | 80,647 |
| Countries in Southeast Asia With an Empty Map | 0 | - | 4.97 | 101,908 |
| China Cities Map Quiz | 0 | - | 4.94 | 105,722 |
| Provinces of China Map Quiz | 0 | - | 4.92 | 94,364 |
| Japan Country Quiz | 0 | - | 4.93 | 143,094 |
| Countries Kim Jong Un Has Been To | 0 | - | 4.95 | 33,220 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.69 | 55,599 |
| Countries with the Most Ascents of Mount Everest | 0 | - | 4.95 | 58,490 |
| Nepal Country Quiz | 0 | - | 4.95 | 37,913 |
| African Countries with the Most Christians | 0 | - | 4.94 | 75,950 |
| Name a Valid African Country | 0 | - | 4.98 | 154,791 |
| Biggest Trading Partners – Australia | 0 | - | 4.93 | 61,875 |
| Countries that Beat Australia | 0 | - | 4.92 | 93,287 |
| U.S. Cities A-Z by Clue #1 | 0 | - | 4.36 | 39,900 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,330 |
| Rivers of the United States | 0 | - | 4.93 | 66,540 |
| Pixelated United States Map | 0 | - | 4.88 | 94,653 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 110,267 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 92,243 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 146,974 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,578 |
| Top 10 U.S. States by Republican Party Support | 0 | - | 4.44 | 75,726 |
| Top 10 U.S. States by Democratic Party Support | 0 | - | 4.63 | 81,580 |
| Top 10 U.S. Swing States in the 2024 Election | 0 | - | 4.51 | 75,364 |
| The Bill Clinton Presidency | 0 | - | 4.24 | 31,512 |
| The George H. W. Bush Presidency | 0 | - | 4.36 | 21,538 |
| The Ronald Reagan Presidency | 0 | - | 4.26 | 24,869 |
| The Richard Nixon Presidency | 0 | - | 4.05 | 22,073 |
| The Barack Obama Presidency | 0 | - | 4.13 | 25,471 |
| American Founding Fathers | 0 | - | 4.42 | 23,260 |
| Countries Closest to Alaska | 0 | - | 4.93 | 124,908 |
| Countries Closest to Maine | 0 | - | 4.85 | 67,459 |
| Six Flags Over Texas | 0 | - | 4.78 | 63,538 |
| LeBron James Trivia | 0 | - | 4.01 | 171,422 |
| People on Money - United States | 0 | - | 4.31 | 63,406 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,561 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,175 |
| Events in U.S. History | 0 | - | 4.41 | 28,781 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,172 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,767 |
| U.S. History for Dummies | 0 | - | 4.47 | 83,331 |
| Last Names in U.S. History #2 | 0 | - | 4.39 | 17,674 |
| The American Civil War | 0 | - | 4.62 | 52,585 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 118,800 |
| U.S. States by Clue #1 | 0 | - | 4.51 | 39,336 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 112,019 |
| 10 Southernmost U.S. States | 0 | - | 4.89 | 114,035 |
| U.S. States with Short Names | 0 | - | 4.91 | 149,681 |
| U.S. States that Start with M | 0 | - | 4.93 | 188,036 |
| U.S. States By Population | 0 | - | 4.92 | 153,965 |
| U.S. States that Start with N | 0 | - | 4.95 | 171,994 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,759 |
| U.S. States by Church Attendance | 0 | - | 4.59 | 32,529 |
| U.S. States with the Most Billionaires | 0 | - | 4.51 | 50,523 |
| Top U.S. States in Crude Oil Production | 0 | - | 4.51 | 41,124 |
| Random General Knowledge - U.S. States | 0 | - | 4.46 | 42,121 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 49,117 |
| US States with an Empty Map | 0 | - | 5.00 | 627,494 |
