| U.S. Presidents by Picture | 0 | - | 4.87 | 426,703 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,354 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 381,994 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 191,978 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,702,027 |
| The John F. Kennedy Presidency | 0 | - | 4.47 | 43,759 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 305,100 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,201 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,201 |
| U.S. President Scramble | 0 | - | 4.40 | 116,828 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,513 |
| The Jimmy Carter Presidency | 0 | - | 4.41 | 19,145 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 70,071 |
| Presidential Actors | 0 | - | 4.36 | 19,185 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,915 |
| The Barack Obama Presidency | 0 | - | 4.13 | 25,413 |
| U.S. Presidents by Picture - Multiple Choice | 0 | - | 4.50 | 28,857 |
| 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 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 108,798 |
| U.S. Presidents by Event | 0 | - | 4.58 | 34,568 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.62 | 93,866 |
| Presidential Middle Names | 0 | - | 4.41 | 60,320 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,389 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,628 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,705 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,454 |
| Most-Visited Countries by U.S. Presidents | 0 | - | 4.96 | 193,700 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,597 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,962 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 35,017 |
| Random U.S. Presidents by Picture | 0 | - | 4.40 | 66,285 |
| Random Sequential U.S. States on a Map | 0 | - | 4.99 | 234,495 |
| George Bush... or George Bush | 0 | - | 3.98 | 8,206 |
| Colonies of the Americas in 1775 with a Map | 0 | - | 4.88 | 19,636 |
| Random U.S. States on a Map | 0 | - | 4.96 | 626,934 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,330 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,267 |
| First Ladies of the United States | 0 | - | 4.28 | 85,681 |
| 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 | 23,981 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,883 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 129,303 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,839 |
| U.S. Map with Random Merged States | 0 | - | 4.94 | 302,657 |
| United States Map Quiz | 0 | - | 4.98 | 4,160,508 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 28,652 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 20,066 |
| The George Washington Presidency | 0 | - | 4.03 | 14,550 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,737 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,655 |
| The John Adams Presidency | 0 | - | 4.12 | 8,751 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,939 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,744 |
| 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 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,859 |
| Vatican City Country Quiz | 0 | - | 4.53 | 44,409 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,759 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 69,370 |
| Countries of the Soviet Union | 0 | - | 4.98 | 194,666 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,787 |
| George Washington... or George W. Bush? | 0 | - | 4.16 | 12,267 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,941 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,525 |
| Name the U.S. National Parks | 0 | - | 4.86 | 59,998 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,551 |
| Total United States Immigration by Country | 0 | - | 4.91 | 111,729 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,520 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 174,613 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 244,303 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 332,465 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,082 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,903 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,816 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 74,197 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,280 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 39,975 |
| US States Quiz | 0 | - | 5.00 | 16,889,700 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 367,224 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,514 |
| Countries of Europe in 1848 | 0 | - | 4.99 | 82,490 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,814 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,125 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,981 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 116,102 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,741 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 81,323 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,194 |
| Pixelated United States Map | 0 | - | 4.87 | 94,334 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 109,775 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 91,841 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 146,526 |
| Countries that Beat the United States | 0 | - | 4.93 | 167,579 |
| U.S. Presidents True or False | 0 | - | 3.96 | 15,611 |
| The Kennedy Family | 0 | - | 3.90 | 14,075 |
| American Revolution Decoder | 0 | - | 4.10 | 20,963 |
| Six Flags Over Texas | 0 | - | 4.78 | 63,394 |
| Events in U.S. History | 0 | - | 4.41 | 28,686 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,119 |
| U.S. History for Dummies | 0 | - | 4.47 | 83,101 |
| The Most Recent... United States | 0 | - | 4.45 | 18,466 |
| The American Civil War | 0 | - | 4.62 | 52,444 |
| Biggest Cities in the Confederate States in 1860 | 0 | - | 4.41 | 23,645 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 117,982 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 506,991 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 111,524 |
| 10 Southernmost U.S. States | 0 | - | 4.89 | 113,530 |
| U.S. States with Short Names | 0 | - | 4.91 | 149,114 |
| U.S. States that Start with M | 0 | - | 4.93 | 187,411 |
| U.S. States By Population | 0 | - | 4.92 | 153,622 |
| U.S. States that Start with N | 0 | - | 4.95 | 171,536 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,488 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 48,686 |
| US States with an Empty Map | 0 | - | 5.00 | 625,084 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 82,605 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,387 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,250 |
| Draw All US State Borders | 0 | - | 4.99 | 137,887 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 65,684 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 160,131 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 177,846 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 125,315 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,602 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 86,335 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,828 |
| 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 | 67,626 |
| Draw All US State Borders - Extreme | 0 | - | 4.99 | 78,604 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 96,171 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 133,310 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 165,467 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 103,875 |
| All Modern-Day Countries Ever Controlled by Greeks | 0 | - | 4.98 | 54,204 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 61,179 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,932 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,345 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,607 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 237,514 |
| Most-Visited Countries by Popes | 0 | - | 4.56 | 83,773 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 69,974 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,694 |
| Countries Bordering China Since 1914 | 0 | - | 4.93 | 95,284 |
| All Modern-Day Countries Ever Controlled by Chinese People | 0 | - | 4.82 | 54,858 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 89,354 |
| Rivers of the United States | 0 | - | 4.93 | 66,244 |
| Names of Generations | 0 | - | 4.09 | 45,017 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 118,226 |
| U.S. Senators by State | 0 | - | 4.44 | 39,973 |
| U.S. Presidents by State | 0 | - | 4.34 | 68,703 |
| American Founding Fathers | 0 | - | 4.42 | 23,230 |
| The American Revolution | 0 | - | 4.52 | 54,265 |
| Countries Closest to Alaska | 0 | - | 4.93 | 124,421 |
| Stephen Curry Quiz | 0 | - | 4.37 | 67,012 |
| History of Florida | 0 | - | 4.45 | 9,828 |
| The Life of Martin Luther King Jr. | 0 | - | 4.73 | 11,108 |
| Hawaiian Islands | 0 | - | 4.83 | 42,737 |
| Countries Closest to Maine | 0 | - | 4.85 | 67,159 |
| History of Texas | 0 | - | 4.43 | 14,637 |
| LeBron James Trivia | 0 | - | 4.01 | 171,025 |
| LeBron... or Kobe? | 0 | - | 4.04 | 70,040 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,343 |
| American History Quotes #1 | 0 | - | 4.37 | 96,054 |
| People on Money - United States | 0 | - | 4.31 | 63,354 |
| American History Quotes #2 | 0 | - | 4.38 | 41,420 |
| Old West History | 0 | - | 4.34 | 15,280 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,477 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,081 |
| Life of Benjamin Franklin | 0 | - | 4.24 | 6,523 |
| American Revolution - Multiple Choice | 0 | - | 4.34 | 19,942 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,738 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,254 |
| Fifty US States in One Minute | 0 | - | 4.61 | 3,541,315 |
| U.S. State Flags | 0 | - | 4.88 | 170,728 |
| U.S. States that Border Canada | 0 | - | 4.91 | 185,138 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 209,132 |
| Category Elimination - U.S. States #1 | 0 | - | 4.88 | 220,962 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 134,338 |
| Great Plains States and Provinces on a Map | 0 | - | 4.95 | 49,545 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 124,722 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 125,738 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 92,173 |
| 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 | 58,167 |
| Name a Valid U.S. President by Birth State | 0 | - | 4.60 | 9,782 |
| Midwestern States of the U.S. | 0 | - | 4.88 | 13,847 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 161,580 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 89,011 |
| All Modern-Day Countries Ever Controlled by French People | 0 | - | 4.99 | 58,136 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.98 | 74,349 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,645 |
| Biggest Roman Empire Countries | 0 | - | 4.87 | 101,932 |
| Ultimate Harry Potter Name Game | 0 | - | 4.94 | 493,514 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 82,799 |
| The Vietnam War | 0 | - | 4.44 | 35,546 |
| U.S. States Closest to Tokyo | 0 | - | 4.89 | 60,568 |
