| U.S. Presidents Quiz | 0 | - | 5.00 | 3,734,028 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 194,169 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 109,718 |
| U.S. Presidents by Event | 0 | - | 4.58 | 35,529 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.62 | 94,821 |
| Presidential Middle Names | 0 | - | 4.42 | 60,852 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,772 |
| Assassinated U.S. Presidents | 0 | - | 4.62 | 94,966 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,676 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 35,271 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 70,705 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 384,066 |
| U.S. Vice Presidents | 0 | - | 4.39 | 137,257 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,390 |
| U.S. Presidential Running Mates | 0 | - | 4.41 | 28,814 |
| First Ladies of the United States | 0 | - | 4.28 | 86,051 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,343 |
| U.S. Presidents in Order by First Letter | 0 | - | 4.32 | 77,559 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,394 |
| Add a Letter - Make a U.S. President | 0 | - | 4.58 | 24,133 |
| Win the 1828 U.S. Presidential Election | 0 | - | 4.32 | 59,807 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,966 |
| U.S. Presidents Who Added the Most Territory | 0 | - | 4.67 | 14,267 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 429,044 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 48,128 |
| U.S. Presidents by Picture - Multiple Choice | 0 | - | 4.50 | 29,099 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,791 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,787 |
| The John Adams Presidency | 0 | - | 4.12 | 8,802 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,790 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,947 |
| Play-Doh Presidents | 0 | - | 5.00 | 83,003 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.38 | 24,098 |
| The George Washington Presidency | 0 | - | 4.03 | 14,623 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 17,007 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,401 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,780 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 306,522 |
| Vietnam War Countries | 0 | - | 4.82 | 94,794 |
| George Washington... or George W. Bush? | 0 | - | 4.16 | 12,316 |
| U.S. President Scramble | 0 | - | 4.40 | 117,602 |
| U.S. Presidents True or False | 0 | - | 3.96 | 15,663 |
| The Kennedy Family | 0 | - | 3.90 | 14,116 |
| U.S. Senators by State | 0 | - | 4.44 | 40,157 |
| Presidents that Beat Thomas Jefferson | 0 | - | 4.47 | 25,119 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,630 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,302 |
| The John F. Kennedy Presidency | 0 | - | 4.47 | 43,979 |
| The American Revolution | 0 | - | 4.52 | 54,407 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 192,119 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 129,775 |
| Mississippi River States Empty Map Quiz | 0 | - | 4.82 | 56,410 |
| Win the U.S. Presidential Election | 0 | - | 4.79 | 638,180 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 20,157 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,376 |
| United States Map Quiz | 0 | - | 4.98 | 4,174,669 |
| The Jimmy Carter Presidency | 0 | - | 4.41 | 19,253 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,972 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,875 |
| Random U.S. Presidents by Picture | 0 | - | 4.40 | 66,671 |
| The Barack Obama Presidency | 0 | - | 4.14 | 25,538 |
| Harvard University | 0 | - | 4.15 | 8,337 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 89,958 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.89 | 114,699 |
| The Iraq War | 0 | - | 4.47 | 15,726 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 114,054 |
| Rust Belt Cities Map Quiz | 0 | - | 4.57 | 35,333 |
| Top 10 U.S. States by Republican Party Support | 0 | - | 4.44 | 75,914 |
| Top 10 U.S. States by Democratic Party Support | 0 | - | 4.63 | 81,800 |
| Top 10 U.S. Swing States in the 2024 Election | 0 | - | 4.51 | 75,514 |
| Presidential Actors | 0 | - | 4.36 | 19,272 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 70,880 |
| U.S. States Closest to Moscow | 0 | - | 4.50 | 48,310 |
| Countries of the Soviet Union | 0 | - | 4.98 | 195,766 |
| Soviet Union Country Quiz | 0 | - | 4.91 | 81,271 |
| U.S. State Border Crossings | 0 | - | 4.97 | 97,006 |
| Name the U.S. National Parks | 0 | - | 4.86 | 60,648 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 241,060 |
| Total United States Immigration by Country | 0 | - | 4.91 | 112,641 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 76,121 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 176,049 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 247,324 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 73,211 |
| The Bill Clinton Presidency | 0 | - | 4.24 | 31,564 |
| The George H. W. Bush Presidency | 0 | - | 4.36 | 21,568 |
| The Ronald Reagan Presidency | 0 | - | 4.26 | 24,915 |
| The Richard Nixon Presidency | 0 | - | 4.05 | 22,114 |
| Cities and Towns of Massachusetts | 0 | - | 4.93 | 75,344 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,875 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 40,361 |
| US States Quiz | 0 | - | 5.00 | 17,036,395 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 369,010 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,679 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 86,323 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 66,143 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.97 | 72,105 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,806 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 146,194 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 117,210 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 119,170 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,781 |
| 10 Longest Rivers in the United States | 0 | - | 4.86 | 39,486 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 336,667 |
| Pixelated United States Map | 0 | - | 4.89 | 95,057 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 110,856 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 92,684 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 147,481 |
| Countries that Beat the United States | 0 | - | 4.93 | 169,039 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,181 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,885 |
| George Bush... or George Bush | 0 | - | 3.98 | 8,244 |
| American Revolution Decoder | 0 | - | 4.12 | 21,006 |
| California A-Z | 0 | - | 4.49 | 28,868 |
| Las Vegas Casinos | 0 | - | 4.13 | 38,171 |
| Six Flags Over Texas | 0 | - | 4.78 | 63,698 |
| U.S. History for Dummies | 0 | - | 4.47 | 83,542 |
| The Most Recent... United States | 0 | - | 4.46 | 18,609 |
| The American Civil War | 0 | - | 4.62 | 52,687 |
| U.S. Civil War Decoder | 0 | - | 4.14 | 25,352 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 119,278 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 511,387 |
| U.S. States with the Letter Y | 0 | - | 4.86 | 112,510 |
| 10 Southernmost U.S. States | 0 | - | 4.89 | 114,521 |
| U.S. States with Short Names | 0 | - | 4.91 | 150,615 |
| U.S. States that Start with M | 0 | - | 4.94 | 188,685 |
| U.S. States By Population | 0 | - | 4.92 | 154,329 |
| U.S. States that Start with N | 0 | - | 4.95 | 172,461 |
| U.S. States with Longest Names | 0 | - | 4.85 | 45,030 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 49,522 |
| US States with an Empty Map | 0 | - | 5.00 | 630,010 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 83,207 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 89,038 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,626 |
| Draw All US State Borders | 0 | - | 4.99 | 141,809 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 66,267 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 161,234 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 178,355 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 125,811 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,899 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 86,758 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 102,640 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 83,149 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.85 | 68,103 |
| Merged U.S. States | 0 | - | 4.37 | 44,473 |
| Draw All US State Borders - Extreme | 0 | - | 4.99 | 79,578 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 97,500 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 134,725 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 166,713 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 105,092 |
| All Modern-Day Countries Ever Controlled by Greeks | 0 | - | 4.97 | 54,835 |
| Least Irish U.S. States | 0 | - | 4.49 | 18,425 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 61,879 |
| Countries of Iberia in History with a Map | 0 | - | 4.88 | 42,583 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 87,097 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 99,245 |
| Commonwealth of Nations Countries | 0 | - | 4.95 | 238,701 |
| Vatican City Country Quiz | 0 | - | 4.53 | 44,745 |
| Most-Visited Countries by Popes | 0 | - | 4.56 | 84,302 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 70,708 |
| The Persian Gulf War | 0 | - | 4.02 | 8,492 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 73,151 |
| Countries Bordering China Since 1914 | 0 | - | 4.93 | 95,981 |
| All Modern-Day Countries Ever Controlled by Chinese People | 0 | - | 4.81 | 55,341 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 90,180 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 81,881 |
| South America Flags Map Quiz | 0 | - | 4.95 | 89,283 |
| Rivers of the United States | 0 | - | 4.93 | 66,850 |
| Names of Generations | 0 | - | 4.09 | 45,640 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 118,885 |
| American Founding Fathers | 0 | - | 4.42 | 23,311 |
| Countries Closest to Alaska | 0 | - | 4.93 | 125,412 |
| Top 10 Los Angeles Lakers of All-Time | 0 | - | 4.24 | 47,283 |
| History of Florida | 0 | - | 4.45 | 9,892 |
| Hawaiian Islands | 0 | - | 4.83 | 43,055 |
| Countries Closest to Maine | 0 | - | 4.85 | 67,755 |
| New York Yankees Trivia | 0 | - | 4.29 | 7,290 |
| History of Texas | 0 | - | 4.43 | 14,709 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,600 |
| American History Quotes #1 | 0 | - | 4.37 | 96,271 |
| People on Money - United States | 0 | - | 4.31 | 63,524 |
| American History Quotes #2 | 0 | - | 4.38 | 41,549 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,644 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.09 | 55,030 |
| Events in U.S. History | 0 | - | 4.41 | 28,871 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,228 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,814 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,379 |
| U.S. State Flags | 0 | - | 4.88 | 173,749 |
| U.S. States that Border Canada | 0 | - | 4.91 | 187,243 |
| U.S. States by Church Attendance | 0 | - | 4.59 | 32,596 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 211,010 |
| Great Plains States and Provinces on a Map | 0 | - | 4.95 | 50,358 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 126,130 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 126,792 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 93,075 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.83 | 62,314 |
| U.S. States that Start with M - Shape Quiz | 0 | - | 4.94 | 58,585 |
| Neutral European Countries of WWII | 0 | - | 4.92 | 162,643 |
| All Modern-Day Countries Ever Controlled by French People | 0 | - | 4.99 | 58,668 |
| Biggest Roman Empire Countries | 0 | - | 4.87 | 102,484 |
