| U.S. Presidents Quiz | 0 | - | 5.00 | 3,701,905 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 191,972 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 108,794 |
| U.S. Presidents by Event | 0 | - | 4.58 | 34,565 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.62 | 93,863 |
| Presidential Middle Names | 0 | - | 4.41 | 60,318 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,389 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,626 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,452 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 35,017 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 70,070 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 381,987 |
| U.S. Presidents Who Added the Most Territory | 0 | - | 4.66 | 14,116 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,328 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,267 |
| First Ladies of the United States | 0 | - | 4.28 | 85,679 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,234 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 77,146 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,218 |
| Add a Letter - Make a U.S. President | 0 | - | 4.57 | 23,979 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,839 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,962 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 426,698 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,915 |
| U.S. Presidents by Picture - Multiple Choice | 0 | - | 4.50 | 28,856 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 28,652 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,737 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,654 |
| The John Adams Presidency | 0 | - | 4.12 | 8,751 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,744 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,859 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,352 |
| The George Washington Presidency | 0 | - | 4.03 | 14,550 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,939 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,329 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,691 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 305,091 |
| Vietnam War Countries | 0 | - | 4.82 | 94,272 |
| George Washington... or George W. Bush? | 0 | - | 4.16 | 12,267 |
| U.S. President Scramble | 0 | - | 4.40 | 116,827 |
| U.S. Presidents True or False | 0 | - | 3.96 | 15,611 |
| The Kennedy Family | 0 | - | 3.90 | 14,075 |
| U.S. Senators by State | 0 | - | 4.44 | 39,971 |
| Presidents that Beat Thomas Jefferson | 0 | - | 4.49 | 24,955 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,513 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,200 |
| The John F. Kennedy Presidency | 0 | - | 4.47 | 43,759 |
| The American Revolution | 0 | - | 4.52 | 54,264 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,879 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 129,302 |
| Mississippi River States Empty Map Quiz | 0 | - | 4.82 | 55,987 |
| Win the U.S. Presidential Election | 0 | - | 4.78 | 628,403 |
| The Jimmy Carter Presidency | 0 | - | 4.41 | 19,145 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 20,066 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,705 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,201 |
| United States Map Quiz | 0 | - | 4.98 | 4,160,436 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,596 |
| Random U.S. Presidents by Picture | 0 | - | 4.40 | 66,284 |
| The Barack Obama Presidency | 0 | - | 4.13 | 25,413 |
| Harvard University | 0 | - | 4.15 | 8,299 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 89,010 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,644 |
| The Iraq War | 0 | - | 4.47 | 15,657 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,758 |
| Rust Belt Cities Map Quiz | 0 | - | 4.57 | 35,119 |
| Top 10 U.S. States by Republican Party Support | 0 | - | 4.44 | 75,540 |
| Top 10 U.S. States by Democratic Party Support | 0 | - | 4.63 | 81,378 |
| Top 10 U.S. Swing States in the 2024 Election | 0 | - | 4.51 | 75,223 |
| Presidential Actors | 0 | - | 4.36 | 19,184 |
| The Bill Clinton Presidency | 0 | - | 4.24 | 31,470 |
| The George H. W. Bush Presidency | 0 | - | 4.36 | 21,500 |
| The Ronald Reagan Presidency | 0 | - | 4.26 | 24,834 |
| The Richard Nixon Presidency | 0 | - | 4.05 | 22,025 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 69,365 |
| U.S. States Closest to Moscow | 0 | - | 4.50 | 48,070 |
| Countries of the Soviet Union | 0 | - | 4.98 | 194,665 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,783 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,933 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,523 |
| Name the U.S. National Parks | 0 | - | 4.86 | 59,997 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,550 |
| Total United States Immigration by Country | 0 | - | 4.91 | 111,726 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,519 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 174,606 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 244,292 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,900 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 74,197 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,279 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 39,974 |
| US States Quiz | 0 | - | 5.00 | 16,889,117 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 367,221 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,502 |
| Countries of Europe in 1848 | 0 | - | 4.99 | 82,456 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,802 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,117 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,973 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 144,739 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 116,096 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,736 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 81,321 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,193 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 332,448 |
| Pixelated United States Map | 0 | - | 4.87 | 94,333 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 109,767 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 91,840 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 146,519 |
| Countries that Beat the United States | 0 | - | 4.93 | 167,576 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,082 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,816 |
| George Bush... or George Bush | 0 | - | 3.98 | 8,205 |
| American Revolution Decoder | 0 | - | 4.10 | 20,962 |
| California A-Z | 0 | - | 4.49 | 28,795 |
| Las Vegas Casinos | 0 | - | 4.13 | 38,072 |
| Six Flags Over Texas | 0 | - | 4.78 | 63,390 |
| U.S. History for Dummies | 0 | - | 4.47 | 83,100 |
| The Most Recent... United States | 0 | - | 4.45 | 18,465 |
| The American Civil War | 0 | - | 4.62 | 52,444 |
| U.S. Civil War Decoder | 0 | - | 4.14 | 25,278 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 117,980 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 506,975 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 111,521 |
| 10 Southernmost U.S. States | 0 | - | 4.89 | 113,525 |
| U.S. States with Short Names | 0 | - | 4.91 | 149,109 |
| U.S. States that Start with M | 0 | - | 4.93 | 187,402 |
| U.S. States By Population | 0 | - | 4.92 | 153,618 |
| U.S. States that Start with N | 0 | - | 4.95 | 171,532 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,486 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 48,684 |
| US States with an Empty Map | 0 | - | 5.00 | 625,060 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 82,604 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,386 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,247 |
| Most Common Immigrant Origin by U.S. State | 0 | - | 4.90 | 66,838 |
| Draw All US State Borders | 0 | - | 4.99 | 137,874 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 65,682 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 160,126 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 177,844 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 125,310 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,599 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 86,331 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,826 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,527 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.85 | 67,621 |
| Merged U.S. States | 0 | - | 4.37 | 44,181 |
| Draw All US State Borders - Extreme | 0 | - | 4.99 | 78,602 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 96,166 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 133,309 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 165,465 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 103,869 |
| All Modern-Day Countries Ever Controlled by Greeks | 0 | - | 4.98 | 54,199 |
| Least Irish U.S. States | 0 | - | 4.49 | 18,322 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 61,175 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,930 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,342 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,604 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 237,510 |
| Vatican City Country Quiz | 0 | - | 4.53 | 44,408 |
| Most-Visited Countries by Popes | 0 | - | 4.56 | 83,771 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 69,971 |
| The Persian Gulf War | 0 | - | 4.02 | 8,451 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,694 |
| Countries Bordering China Since 1914 | 0 | - | 4.93 | 95,283 |
| All Modern-Day Countries Ever Controlled by Chinese People | 0 | - | 4.82 | 54,856 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 89,350 |
| South America Flags Map Quiz | 0 | - | 4.95 | 88,046 |
| Rivers of the United States | 0 | - | 4.93 | 66,236 |
| Names of Generations | 0 | - | 4.09 | 45,014 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 118,223 |
| American Founding Fathers | 0 | - | 4.42 | 23,230 |
| Countries Closest to Alaska | 0 | - | 4.93 | 124,418 |
| Top 10 Los Angeles Lakers of All-Time | 0 | - | 4.24 | 46,948 |
| History of Florida | 0 | - | 4.45 | 9,828 |
| Hawaiian Islands | 0 | - | 4.83 | 42,736 |
| Countries Closest to Maine | 0 | - | 4.85 | 67,155 |
| New York Yankees Trivia | 0 | - | 4.29 | 7,218 |
| History of Texas | 0 | - | 4.43 | 14,637 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,342 |
| American History Quotes #1 | 0 | - | 4.37 | 96,053 |
| People on Money - United States | 0 | - | 4.31 | 63,354 |
| American History Quotes #2 | 0 | - | 4.38 | 41,419 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,477 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,081 |
| Events in U.S. History | 0 | - | 4.41 | 28,686 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,119 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,738 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,254 |
| U.S. State Flags | 0 | - | 4.88 | 170,725 |
| U.S. States that Border Canada | 0 | - | 4.91 | 185,134 |
| U.S. States by Church Attendance | 0 | - | 4.59 | 32,448 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 209,121 |
| Great Plains States and Provinces on a Map | 0 | - | 4.95 | 49,543 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 124,719 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 125,737 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 92,170 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,933 |
| U.S. States that Start with M - Shape Quiz | 0 | - | 4.94 | 58,166 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 161,577 |
| All Modern-Day Countries Ever Controlled by French People | 0 | - | 4.99 | 58,134 |
| Biggest Roman Empire Countries | 0 | - | 4.87 | 101,930 |
