| U.S. Presidents Quiz | 0 | - | 5.00 | 3,653,758 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 423,684 |
| Play-Doh Presidents | 0 | - | 5.00 | 81,663 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 379,524 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 189,819 |
| The John F. Kennedy Presidency | 0 | - | 4.47 | 43,475 |
| U.S. Vice Presidents | 0 | - | 4.41 | 134,922 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 107,940 |
| U.S. Presidents by Event | 0 | - | 4.58 | 33,472 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 92,997 |
| Presidential Middle Names | 0 | - | 4.41 | 59,699 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 52,728 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 93,810 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,165 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,356 |
| Random U.S. Presidents by Picture | 0 | - | 4.39 | 65,813 |
| The Jimmy Carter Presidency | 0 | - | 4.41 | 19,032 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 303,347 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,739 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,445 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 69,402 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,018 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,163 |
| First Ladies of the United States | 0 | - | 4.28 | 85,242 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,110 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 76,271 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 15,998 |
| Add a Letter - Make a U.S. President | 0 | - | 4.61 | 23,832 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,684 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,361 |
| Presidential Actors | 0 | - | 4.36 | 19,063 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,086 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,814 |
| U.S. President Scramble | 0 | - | 4.40 | 116,192 |
| U.S. Presidents by Picture - Multiple Choice | 0 | - | 4.49 | 28,591 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,693 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,236 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 28,460 |
| The Bill Clinton Presidency | 0 | - | 4.22 | 31,352 |
| The George H. W. Bush Presidency | 0 | - | 4.36 | 21,417 |
| The Ronald Reagan Presidency | 0 | - | 4.26 | 24,720 |
| The Richard Nixon Presidency | 0 | - | 4.05 | 21,921 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,661 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,497 |
| The John Adams Presidency | 0 | - | 4.12 | 8,676 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,682 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,771 |
| United States Map Quiz | 0 | - | 4.98 | 4,141,600 |
| The George Washington Presidency | 0 | - | 4.03 | 14,475 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,869 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,207 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,609 |
| The Barack Obama Presidency | 0 | - | 4.16 | 25,253 |
| Countries of the Soviet Union | 0 | - | 4.98 | 193,820 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,230 |
| George Washington... or George W. Bush? | 0 | - | 4.16 | 12,214 |
| U.S. State Border Crossings | 0 | - | 4.97 | 95,947 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,311 |
| Third Most Common Language by U.S. State | 0 | - | 4.89 | 113,375 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 74,861 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 28,879 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.49 | 11,669 |
| Most-Visited Countries by U.S. Presidents | 0 | - | 4.96 | 192,531 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 73,055 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 39,487 |
| US States Quiz | 0 | - | 5.00 | 16,698,703 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 365,241 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 67,398 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 148,932 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,407 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,395 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,103 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,010 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 105,877 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 80,668 |
| Name the U.S. National Parks | 0 | - | 4.86 | 58,891 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 38,802 |
| Total United States Immigration by Country | 0 | - | 4.91 | 110,654 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 173,139 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 240,877 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 327,919 |
| Pixelated United States Map | 0 | - | 4.89 | 93,466 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 108,452 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 90,839 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 145,408 |
| Countries that Beat the United States | 0 | - | 4.93 | 165,558 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,524 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 19,958 |
| U.S. Presidents True or False | 0 | - | 3.96 | 15,527 |
| George Bush... or George Bush | 0 | - | 3.98 | 8,178 |
| The Kennedy Family | 0 | - | 3.90 | 14,026 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.84 | 65,615 |
| Six Flags Over Texas | 0 | - | 4.79 | 63,007 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 32,992 |
| U.S. History for Dummies | 0 | - | 4.47 | 82,475 |
| The Most Recent... United States | 0 | - | 4.45 | 18,287 |
| The American Civil War | 0 | - | 4.62 | 52,155 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 116,718 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 501,771 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 110,345 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 112,398 |
| U.S. States with Short Names | 0 | - | 4.91 | 147,657 |
| U.S. States that Start with M | 0 | - | 4.93 | 185,894 |
| U.S. States By Population | 0 | - | 4.92 | 152,350 |
| U.S. States that Start with N | 0 | - | 4.95 | 170,392 |
| U.S. States with Longest Names | 0 | - | 4.84 | 43,852 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 47,574 |
| US States with an Empty Map | 0 | - | 5.00 | 618,768 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 81,891 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 87,545 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 63,761 |
| Draw All US State Borders | 0 | - | 4.99 | 133,574 |
| The Only Remaining U.S. State . . . | 0 | - | 4.92 | 64,872 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 158,867 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 177,075 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 124,476 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,064 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 85,656 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,085 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 81,925 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.84 | 66,824 |
| U.S. States or European Countries by Area | 0 | - | 4.94 | 94,697 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 131,923 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 164,472 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 102,592 |
| All Modern-Day Countries Ever Controlled by Greeks | 0 | - | 4.98 | 53,445 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 60,364 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 114,828 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,132 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 85,487 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,257 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 97,829 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 236,252 |
| Vatican City Country Quiz | 0 | - | 4.53 | 43,997 |
| Most-Visited Countries by Popes | 0 | - | 4.55 | 83,169 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 69,208 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,269 |
| Countries Bordering China Since 1914 | 0 | - | 4.93 | 94,722 |
| All Modern-Day Countries Ever Controlled by Chinese People | 0 | - | 4.82 | 54,276 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 88,434 |
| Rivers of the United States | 0 | - | 4.93 | 65,505 |
| Countries Closest to United States A-Z | 0 | - | 4.81 | 117,402 |
| U.S. Presidents by State | 0 | - | 4.34 | 68,484 |
| American Founding Fathers | 0 | - | 4.41 | 23,073 |
| The American Revolution | 0 | - | 4.52 | 54,053 |
| Countries Closest to Alaska | 0 | - | 4.93 | 123,306 |
| History of Florida | 0 | - | 4.45 | 9,764 |
| The Life of Martin Luther King Jr. | 0 | - | 4.73 | 11,057 |
| Hawaiian Islands | 0 | - | 4.83 | 42,426 |
| Countries Closest to Maine | 0 | - | 4.84 | 66,436 |
| History of Texas | 0 | - | 4.43 | 14,554 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,085 |
| American History Quotes #1 | 0 | - | 4.37 | 95,684 |
| People on Money - United States | 0 | - | 4.31 | 63,205 |
| American History Quotes #2 | 0 | - | 4.38 | 41,223 |
| Old West History | 0 | - | 4.33 | 15,223 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,239 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 44,727 |
| Life of Benjamin Franklin | 0 | - | 4.24 | 6,490 |
| American Revolution - Multiple Choice | 0 | - | 4.34 | 19,851 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,643 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,075 |
| Fifty US States in One Minute | 0 | - | 4.56 | 3,518,318 |
| U.S. State Flags | 0 | - | 4.89 | 167,042 |
| U.S. States that Border Canada | 0 | - | 4.91 | 182,415 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 206,674 |
| Category Elimination - U.S. States #1 | 0 | - | 4.87 | 218,519 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 132,487 |
| Great Plains States and Provinces on a Map | 0 | - | 4.95 | 48,566 |
| Random U.S. States on a Map | 0 | - | 4.96 | 621,352 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 123,858 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 124,652 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 91,049 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,546 |
| U.S. States that Start with M - Shape Quiz | 0 | - | 4.94 | 57,646 |
| Name a Valid U.S. President by Birth State | 0 | - | 4.60 | 9,663 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 160,455 |
| Countries of Europe After World War II | 0 | - | 4.99 | 186,720 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 155,344 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 88,029 |
| All Modern-Day Countries Ever Controlled by French People | 0 | - | 4.99 | 57,518 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 72,455 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,301 |
| Biggest Roman Empire Countries | 0 | - | 4.87 | 101,365 |
| Modern-Day Countries of the Roman Empire on a Map | 0 | - | 4.99 | 124,712 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 81,801 |
| The Vietnam War | 0 | - | 4.43 | 35,292 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 103,858 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.68 | 55,167 |
| Colonies of Africa with a Map | 0 | - | 4.77 | 53,940 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 68,530 |
| U.S. Geography by Letter - S | 0 | - | 4.54 | 52,073 |
| Most-Spoken Languages of the United States | 0 | - | 4.52 | 216,670 |
| U.S. State Nicknames Quiz | 0 | - | 4.47 | 50,261 |
| Territories of the United States | 0 | - | 4.79 | 52,141 |
| Countries with American Expatriates | 0 | - | 4.53 | 42,473 |
| Five Biggest Immigrant Groups by Decade in the US | 0 | - | 4.78 | 39,372 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 743,129 |
| Most Mentioned Enemies of the USA | 0 | - | 4.77 | 174,536 |
| U.S. Five-Star Generals and Admirals | 0 | - | 4.33 | 8,302 |
