| U.S. Presidents by Picture | 0 | - | 4.87 | 428,338 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,834 |
| Name a Valid U.S. President #1 | 0 | - | 4.90 | 193,681 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,723,774 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 383,478 |
| U.S. Presidents by Picture - Multiple Choice | 0 | - | 4.50 | 29,026 |
| The John F. Kennedy Presidency | 0 | - | 4.47 | 43,917 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,333 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 48,074 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 306,136 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 70,550 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,273 |
| U.S. President Scramble | 0 | - | 4.40 | 117,436 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.42 | 24,060 |
| Presidential Actors | 0 | - | 4.36 | 19,245 |
| The Barack Obama Presidency | 0 | - | 4.14 | 25,499 |
| Random U.S. States on a Map | 0 | - | 4.96 | 629,964 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,602 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 109,521 |
| U.S. Presidents by Event | 0 | - | 4.58 | 35,273 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.62 | 94,591 |
| Presidential Middle Names | 0 | - | 4.41 | 60,699 |
| The Jimmy Carter Presidency | 0 | - | 4.41 | 19,217 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,671 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,879 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,621 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 35,185 |
| George Bush... or George Bush | 0 | - | 3.98 | 8,234 |
| Random U.S. Presidents by Picture | 0 | - | 4.40 | 66,583 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,910 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,374 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,935 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,358 |
| U.S. Presidential Running Mates | 0 | - | 4.41 | 28,760 |
| First Ladies of the United States | 0 | - | 4.28 | 85,934 |
| The Bill Clinton Presidency | 0 | - | 4.24 | 31,531 |
| The George H. W. Bush Presidency | 0 | - | 4.36 | 21,550 |
| The Ronald Reagan Presidency | 0 | - | 4.26 | 24,890 |
| The Richard Nixon Presidency | 0 | - | 4.05 | 22,092 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,307 |
| U.S. Presidents in Order by First Letter | 0 | - | 4.32 | 77,452 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,356 |
| Add a Letter - Make a U.S. President | 0 | - | 4.58 | 24,089 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,800 |
| Win the 1828 U.S. Presidential Election | 0 | - | 4.31 | 58,218 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 129,605 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,937 |
| The American Revolution | 0 | - | 4.52 | 54,349 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,713 |
| Vietnam War Countries | 0 | - | 4.82 | 94,579 |
| United States Map Quiz | 0 | - | 4.98 | 4,170,464 |
| U.S. Senators by State | 0 | - | 4.44 | 40,098 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,777 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,749 |
| The John Adams Presidency | 0 | - | 4.12 | 8,787 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,774 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,923 |
| Random Sequential U.S. States on a Map | 0 | - | 4.99 | 235,184 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 20,143 |
| The George Washington Presidency | 0 | - | 4.03 | 14,605 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,983 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,754 |
| The Kennedy Family | 0 | - | 3.90 | 14,100 |
| Colonies of the Americas in 1775 with a Map | 0 | - | 4.88 | 19,932 |
| Countries of the Soviet Union | 0 | - | 4.98 | 195,503 |
| Vatican City Country Quiz | 0 | - | 4.53 | 44,644 |
| The Iraq War | 0 | - | 4.47 | 15,701 |
| George Washington... or George W. Bush? | 0 | - | 4.16 | 12,297 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,856 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,768 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,957 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,911 |
| Most-Visited Countries by U.S. Presidents | 0 | - | 4.96 | 194,661 |
| Cities and Towns of Massachusetts | 0 | - | 4.93 | 74,944 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 40,235 |
| US States Quiz | 0 | - | 5.00 | 16,985,807 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 70,284 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,284 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 85,189 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,679 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,774 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,512 |
| Soviet Union Country Quiz | 0 | - | 4.91 | 81,120 |
| Name the U.S. National Parks | 0 | - | 4.86 | 60,430 |
| Total United States Immigration by Country | 0 | - | 4.91 | 112,331 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 175,468 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 246,272 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 335,163 |
| Pixelated United States Map | 0 | - | 4.88 | 94,769 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 110,472 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 92,388 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,141 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 73,081 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,861 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,687 |
| Six Flags Over Texas | 0 | - | 4.78 | 63,590 |
| U.S. History for Dummies | 0 | - | 4.47 | 83,389 |
| U.S. Civil War Decoder | 0 | - | 4.14 | 25,334 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 119,006 |
| U.S. States with the Letter Y | 0 | - | 4.86 | 112,211 |
| 10 Southernmost U.S. States | 0 | - | 4.89 | 114,230 |
| U.S. States with Short Names | 0 | - | 4.91 | 150,281 |
| U.S. States that Start with M | 0 | - | 4.93 | 188,298 |
| U.S. States By Population | 0 | - | 4.92 | 154,091 |
| U.S. States that Start with N | 0 | - | 4.95 | 172,164 |
| U.S. States with Longest Names | 0 | - | 4.85 | 44,854 |
| US States with an Empty Map | 0 | - | 5.00 | 628,278 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 83,027 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 368,513 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,820 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,518 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 66,059 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 160,662 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 178,171 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 125,646 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,798 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 86,624 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.85 | 67,959 |
| All Modern-Day Countries Ever Controlled by Greeks | 0 | - | 4.98 | 54,619 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 61,616 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 116,768 |
| Countries of Iberia in History with a Map | 0 | - | 4.88 | 42,341 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,832 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,668 |
| The Persian Gulf War | 0 | - | 4.02 | 8,480 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 73,003 |
| All Modern-Day Countries Ever Controlled by Chinese People | 0 | - | 4.81 | 55,157 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,454 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 81,671 |
| Most Guessed North American Teams by Sport | 0 | - | 4.28 | 65,048 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,375 |
| Rivers of the United States | 0 | - | 4.93 | 66,629 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 147,141 |
| Countries that Beat the United States | 0 | - | 4.93 | 168,579 |
| U.S. Presidents True or False | 0 | - | 3.96 | 15,645 |
| American Founding Fathers | 0 | - | 4.42 | 23,273 |
| Countries Closest to Alaska | 0 | - | 4.93 | 125,067 |
| California A-Z | 0 | - | 4.49 | 28,839 |
| Top 10 Los Angeles Lakers of All-Time | 0 | - | 4.24 | 47,176 |
| Countries Closest to Maine | 0 | - | 4.85 | 67,564 |
| People on Money - United States | 0 | - | 4.31 | 63,430 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,580 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,210 |
| Events in U.S. History | 0 | - | 4.41 | 28,816 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,189 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,775 |
| The Most Recent... United States | 0 | - | 4.46 | 18,564 |
| The American Civil War | 0 | - | 4.62 | 52,620 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 509,877 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 49,229 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 210,441 |
| Great Plains States and Provinces on a Map | 0 | - | 4.95 | 50,057 |
| Cartoon Versions of U.S. States | 0 | - | 4.75 | 64,130 |
| Draw All US State Borders | 0 | - | 4.99 | 140,462 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 125,799 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 126,426 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 92,773 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 102,409 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,998 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.83 | 62,179 |
| Draw All US State Borders - Extreme | 0 | - | 4.99 | 79,220 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 96,990 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 134,112 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 166,387 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 104,615 |
| All Modern-Day Countries Ever Controlled by French People | 0 | - | 4.99 | 58,466 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 99,035 |
| Ultimate Harry Potter Name Game | 0 | - | 4.94 | 494,620 |
| Commonwealth of Nations Countries | 0 | - | 4.95 | 238,217 |
| Most-Visited Countries by Popes | 0 | - | 4.56 | 84,130 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 70,465 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 83,351 |
| Countries Bordering China Since 1914 | 0 | - | 4.92 | 95,802 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 89,891 |
| Random American Countries on a Map | 0 | - | 4.96 | 100,154 |
| Most-Spoken Languages of the United States | 0 | - | 4.52 | 222,340 |
| Names of Generations | 0 | - | 4.09 | 45,485 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 118,661 |
| Most Common High School Mascots | 0 | - | 4.47 | 32,306 |
| History of Florida | 0 | - | 4.45 | 9,872 |
| The Life of Martin Luther King Jr. | 0 | - | 4.73 | 11,134 |
| Hawaiian Islands | 0 | - | 4.83 | 42,932 |
| Top 10 Boston Celtics Players | 0 | - | 4.05 | 23,952 |
| Boston Celtics Trivia | 0 | - | 4.12 | 15,171 |
| History of Texas | 0 | - | 4.43 | 14,681 |
| History of Pennsylvania | 0 | - | 4.16 | 7,163 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,494 |
| History of Virginia | 0 | - | 4.33 | 11,640 |
| American History Quotes #1 | 0 | - | 4.37 | 96,188 |
| American History Quotes #2 | 0 | - | 4.38 | 41,501 |
| Old West History | 0 | - | 4.34 | 15,297 |
| Life of Benjamin Franklin | 0 | - | 4.24 | 6,534 |
| American Revolution - Multiple Choice | 0 | - | 4.34 | 19,982 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,329 |
| Fifty US States in One Minute | 0 | - | 4.61 | 3,554,612 |
| U.S. State Flags | 0 | - | 4.89 | 172,746 |
| U.S. States that Border Canada | 0 | - | 4.91 | 186,541 |
| Category Elimination - U.S. States #1 | 0 | - | 4.88 | 222,353 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 135,507 |
| U.S. States that Start with M - Shape Quiz | 0 | - | 4.94 | 58,414 |
