| U.S. Presidents Quiz | 0 | - | 5.00 | 3,699,638 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 191,863 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 108,748 |
| U.S. Presidents by Event | 0 | - | 4.58 | 34,514 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 93,825 |
| Presidential Middle Names | 0 | - | 4.41 | 60,280 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,358 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,605 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,437 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,998 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 70,034 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 381,780 |
| U.S. Presidents Who Added the Most Territory | 0 | - | 4.66 | 14,111 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,281 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,262 |
| First Ladies of the United States | 0 | - | 4.28 | 85,651 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,228 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 77,101 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,201 |
| Add a Letter - Make a U.S. President | 0 | - | 4.57 | 23,966 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,830 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,957 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 426,564 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,902 |
| U.S. Presidents by Picture - Multiple Choice | 0 | - | 4.50 | 28,846 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 28,639 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,735 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,652 |
| The John Adams Presidency | 0 | - | 4.12 | 8,749 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,744 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,854 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,315 |
| The George Washington Presidency | 0 | - | 4.03 | 14,549 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,935 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,325 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,679 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 304,990 |
| Vietnam War Countries | 0 | - | 4.82 | 94,233 |
| George Washington... or George W. Bush? | 0 | - | 4.16 | 12,266 |
| U.S. President Scramble | 0 | - | 4.40 | 116,794 |
| U.S. Presidents True or False | 0 | - | 3.96 | 15,601 |
| The Kennedy Family | 0 | - | 3.90 | 14,072 |
| U.S. Senators by State | 0 | - | 4.44 | 39,962 |
| Presidents that Beat Thomas Jefferson | 0 | - | 4.49 | 24,949 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,503 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,196 |
| The John F. Kennedy Presidency | 0 | - | 4.47 | 43,752 |
| The American Revolution | 0 | - | 4.52 | 54,260 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,814 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 129,277 |
| Mississippi River States Empty Map Quiz | 0 | - | 4.82 | 55,968 |
| Win the U.S. Presidential Election | 0 | - | 4.78 | 627,881 |
| The Jimmy Carter Presidency | 0 | - | 4.41 | 19,141 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 20,061 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,684 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,192 |
| United States Map Quiz | 0 | - | 4.98 | 4,158,879 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,585 |
| Random U.S. Presidents by Picture | 0 | - | 4.40 | 66,252 |
| The Barack Obama Presidency | 0 | - | 4.13 | 25,404 |
| Harvard University | 0 | - | 4.15 | 8,298 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 88,963 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,623 |
| The Iraq War | 0 | - | 4.47 | 15,655 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,744 |
| Rust Belt Cities Map Quiz | 0 | - | 4.57 | 35,105 |
| Top 10 U.S. States by Republican Party Support | 0 | - | 4.44 | 75,521 |
| Top 10 U.S. States by Democratic Party Support | 0 | - | 4.63 | 81,353 |
| Top 10 U.S. Swing States in the 2024 Election | 0 | - | 4.51 | 75,201 |
| Presidential Actors | 0 | - | 4.36 | 19,176 |
| The Bill Clinton Presidency | 0 | - | 4.24 | 31,462 |
| The George H. W. Bush Presidency | 0 | - | 4.36 | 21,498 |
| The Ronald Reagan Presidency | 0 | - | 4.26 | 24,827 |
| The Richard Nixon Presidency | 0 | - | 4.05 | 22,021 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 69,278 |
| U.S. States Closest to Moscow | 0 | - | 4.50 | 48,060 |
| Countries of the Soviet Union | 0 | - | 4.98 | 194,619 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,758 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,882 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,489 |
| Name the U.S. National Parks | 0 | - | 4.86 | 59,966 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,491 |
| Total United States Immigration by Country | 0 | - | 4.91 | 111,671 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,483 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 174,531 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 244,124 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,885 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 74,091 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,246 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 39,950 |
| US States Quiz | 0 | - | 5.00 | 16,880,053 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 367,111 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,428 |
| Countries of Europe in 1848 | 0 | - | 4.99 | 82,090 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,720 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,044 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,919 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 144,661 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 116,027 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,647 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 81,296 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,179 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 332,154 |
| Pixelated United States Map | 0 | - | 4.87 | 94,286 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 109,709 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 91,788 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 146,465 |
| Countries that Beat the United States | 0 | - | 4.93 | 167,493 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,077 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,811 |
| George Bush... or George Bush | 0 | - | 3.98 | 8,204 |
| American Revolution Decoder | 0 | - | 4.10 | 20,957 |
| California A-Z | 0 | - | 4.49 | 28,790 |
| Las Vegas Casinos | 0 | - | 4.13 | 38,068 |
| Six Flags Over Texas | 0 | - | 4.78 | 63,371 |
| U.S. History for Dummies | 0 | - | 4.47 | 83,071 |
| The Most Recent... United States | 0 | - | 4.45 | 18,453 |
| The American Civil War | 0 | - | 4.62 | 52,426 |
| U.S. Civil War Decoder | 0 | - | 4.14 | 25,273 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 117,892 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 506,697 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 111,449 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 113,462 |
| U.S. States with Short Names | 0 | - | 4.91 | 149,034 |
| U.S. States that Start with M | 0 | - | 4.93 | 187,323 |
| U.S. States By Population | 0 | - | 4.92 | 153,561 |
| U.S. States that Start with N | 0 | - | 4.95 | 171,471 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,451 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 48,634 |
| US States with an Empty Map | 0 | - | 5.00 | 624,767 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 82,539 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,327 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,219 |
| Most Common Immigrant Origin by U.S. State | 0 | - | 4.90 | 66,717 |
| Draw All US State Borders | 0 | - | 4.99 | 137,690 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 65,637 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 160,009 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 177,737 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 125,214 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,520 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 86,254 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,780 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,487 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.85 | 67,544 |
| Merged U.S. States | 0 | - | 4.37 | 44,171 |
| Draw All US State Borders - Extreme | 0 | - | 4.99 | 78,554 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 96,075 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 133,240 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 165,407 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 103,812 |
| All Modern-Day Countries Ever Controlled by Greeks | 0 | - | 4.98 | 54,161 |
| Least Irish U.S. States | 0 | - | 4.49 | 18,313 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 61,134 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,881 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,300 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,563 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 237,447 |
| Vatican City Country Quiz | 0 | - | 4.53 | 44,383 |
| Most-Visited Countries by Popes | 0 | - | 4.56 | 83,743 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 69,922 |
| The Persian Gulf War | 0 | - | 4.02 | 8,449 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,680 |
| Countries Bordering China Since 1914 | 0 | - | 4.93 | 95,261 |
| All Modern-Day Countries Ever Controlled by Chinese People | 0 | - | 4.82 | 54,829 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 89,304 |
| South America Flags Map Quiz | 0 | - | 4.95 | 87,961 |
| Rivers of the United States | 0 | - | 4.93 | 66,212 |
| Names of Generations | 0 | - | 4.09 | 44,950 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 118,189 |
| American Founding Fathers | 0 | - | 4.42 | 23,227 |
| Countries Closest to Alaska | 0 | - | 4.93 | 124,375 |
| Top 10 Los Angeles Lakers of All-Time | 0 | - | 4.24 | 46,921 |
| History of Florida | 0 | - | 4.45 | 9,826 |
| Hawaiian Islands | 0 | - | 4.83 | 42,720 |
| Countries Closest to Maine | 0 | - | 4.85 | 67,121 |
| New York Yankees Trivia | 0 | - | 4.29 | 7,212 |
| History of Texas | 0 | - | 4.43 | 14,630 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,323 |
| American History Quotes #1 | 0 | - | 4.37 | 96,035 |
| People on Money - United States | 0 | - | 4.31 | 63,348 |
| American History Quotes #2 | 0 | - | 4.38 | 41,407 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,469 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,061 |
| Events in U.S. History | 0 | - | 4.41 | 28,674 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,114 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,736 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,246 |
| U.S. State Flags | 0 | - | 4.89 | 170,570 |
| U.S. States that Border Canada | 0 | - | 4.91 | 184,986 |
| U.S. States by Church Attendance | 0 | - | 4.59 | 32,431 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 208,997 |
| Great Plains States and Provinces on a Map | 0 | - | 4.95 | 49,490 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 124,667 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 125,679 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 92,090 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,912 |
| U.S. States that Start with M - Shape Quiz | 0 | - | 4.94 | 58,136 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 161,526 |
| All Modern-Day Countries Ever Controlled by French People | 0 | - | 4.99 | 58,101 |
| Biggest Roman Empire Countries | 0 | - | 4.87 | 101,897 |
