| U.S. Presidents by Picture | 0 | - | 4.87 | 424,935 |
| Play-Doh Presidents | 0 | - | 5.00 | 81,930 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 190,668 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,673,146 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 380,335 |
| The John F. Kennedy Presidency | 0 | - | 4.47 | 43,580 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,084 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,773 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 304,134 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 69,666 |
| U.S. Presidents by Picture - Multiple Choice | 0 | - | 4.49 | 28,696 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,128 |
| U.S. President Scramble | 0 | - | 4.40 | 116,455 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,870 |
| Presidential Actors | 0 | - | 4.36 | 19,115 |
| The Barack Obama Presidency | 0 | - | 4.16 | 25,317 |
| Random U.S. States on a Map | 0 | - | 4.96 | 623,569 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,406 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 108,249 |
| U.S. Presidents by Event | 0 | - | 4.58 | 33,911 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 93,318 |
| Presidential Middle Names | 0 | - | 4.41 | 59,919 |
| The Jimmy Carter Presidency | 0 | - | 4.41 | 19,077 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 52,973 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,191 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,276 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,852 |
| Random U.S. Presidents by Picture | 0 | - | 4.39 | 65,986 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,535 |
| George Bush... or George Bush | 0 | - | 3.98 | 8,191 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,263 |
| U.S. Vice Presidents | 0 | - | 4.39 | 135,615 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,197 |
| First Ladies of the United States | 0 | - | 4.28 | 85,369 |
| The Bill Clinton Presidency | 0 | - | 4.22 | 31,396 |
| The George H. W. Bush Presidency | 0 | - | 4.36 | 21,449 |
| The Ronald Reagan Presidency | 0 | - | 4.26 | 24,761 |
| The Richard Nixon Presidency | 0 | - | 4.05 | 21,961 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,160 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 76,665 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,080 |
| Add a Letter - Make a U.S. President | 0 | - | 4.57 | 23,882 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,440 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 128,914 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,733 |
| The American Revolution | 0 | - | 4.52 | 54,142 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,747 |
| Vietnam War Countries | 0 | - | 4.83 | 93,877 |
| United States Map Quiz | 0 | - | 4.98 | 4,148,074 |
| U.S. Senators by State | 0 | - | 4.45 | 39,843 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 28,546 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,690 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,566 |
| The John Adams Presidency | 0 | - | 4.12 | 8,706 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,710 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,808 |
| Random Sequential U.S. States on a Map | 0 | - | 4.99 | 233,795 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 19,980 |
| The George Washington Presidency | 0 | - | 4.03 | 14,505 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,903 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,638 |
| The Kennedy Family | 0 | - | 3.90 | 14,045 |
| Countries of the Soviet Union | 0 | - | 4.98 | 194,195 |
| Vatican City Country Quiz | 0 | - | 4.53 | 44,167 |
| The Iraq War | 0 | - | 4.47 | 15,596 |
| George Washington... or George W. Bush? | 0 | - | 4.16 | 12,235 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,197 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,804 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,531 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,155 |
| Most-Visited Countries by U.S. Presidents | 0 | - | 4.96 | 193,009 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 73,432 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 39,680 |
| US States Quiz | 0 | - | 5.00 | 16,775,660 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 68,268 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,505 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,836 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,933 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,475 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,352 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,447 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,294 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 80,956 |
| Name the U.S. National Parks | 0 | - | 4.86 | 59,549 |
| Total United States Immigration by Country | 0 | - | 4.91 | 111,010 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 173,734 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 242,190 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 329,722 |
| Pixelated United States Map | 0 | - | 4.89 | 93,801 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 108,975 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 91,225 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 28,973 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,676 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.49 | 11,701 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 65,891 |
| Six Flags Over Texas | 0 | - | 4.78 | 63,148 |
| U.S. History for Dummies | 0 | - | 4.47 | 82,726 |
| U.S. Civil War Decoder | 0 | - | 4.14 | 25,222 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 117,329 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 110,906 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 112,903 |
| U.S. States with Short Names | 0 | - | 4.91 | 148,331 |
| U.S. States that Start with M | 0 | - | 4.93 | 186,564 |
| U.S. States By Population | 0 | - | 4.92 | 152,772 |
| U.S. States that Start with N | 0 | - | 4.95 | 170,869 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,158 |
| US States with an Empty Map | 0 | - | 5.00 | 621,269 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 82,189 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 366,101 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 87,937 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 63,972 |
| The Only Remaining U.S. State . . . | 0 | - | 4.92 | 65,245 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 159,518 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 177,366 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 124,851 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,316 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 85,971 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.85 | 67,189 |
| All Modern-Day Countries Ever Controlled by Greeks | 0 | - | 4.98 | 53,714 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 60,633 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 115,404 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,327 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 85,818 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,818 |
| The Persian Gulf War | 0 | - | 4.02 | 8,424 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,435 |
| All Modern-Day Countries Ever Controlled by Chinese People | 0 | - | 4.82 | 54,521 |
| Most Guessed North American Teams by Sport | 0 | - | 4.28 | 64,075 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 38,937 |
| Rivers of the United States | 0 | - | 4.93 | 65,814 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 145,801 |
| Countries that Beat the United States | 0 | - | 4.93 | 166,112 |
| U.S. Presidents True or False | 0 | - | 3.96 | 15,556 |
| American Founding Fathers | 0 | - | 4.42 | 23,108 |
| Countries Closest to Alaska | 0 | - | 4.93 | 123,775 |
| California A-Z | 0 | - | 4.49 | 28,744 |
| Top 10 Los Angeles Lakers of All-Time | 0 | - | 4.24 | 46,678 |
| Countries Closest to Maine | 0 | - | 4.85 | 66,736 |
| People on Money - United States | 0 | - | 4.31 | 63,260 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,335 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 44,821 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,045 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,686 |
| The Most Recent... United States | 0 | - | 4.45 | 18,367 |
| The American Civil War | 0 | - | 4.62 | 52,271 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 503,993 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 48,066 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 207,598 |
| Great Plains States and Provinces on a Map | 0 | - | 4.95 | 48,973 |
| Cartoon Versions of U.S. States | 0 | - | 4.77 | 63,699 |
| Draw All US State Borders | 0 | - | 4.99 | 135,221 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 124,207 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 125,071 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 91,501 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,393 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,191 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,684 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 95,292 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 132,486 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 164,857 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 103,152 |
| All Modern-Day Countries Ever Controlled by French People | 0 | - | 4.99 | 57,753 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,114 |
| Ultimate Harry Potter Name Game | 0 | - | 4.94 | 492,169 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 236,831 |
| Most-Visited Countries by Popes | 0 | - | 4.56 | 83,402 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 69,491 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 82,199 |
| Countries Bordering China Since 1914 | 0 | - | 4.93 | 94,935 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 88,812 |
| Colonies of Africa with a Map | 0 | - | 4.78 | 54,180 |
| Random American Countries on a Map | 0 | - | 4.96 | 98,995 |
| Most-Spoken Languages of the United States | 0 | - | 4.52 | 218,099 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 117,773 |
| Most Common High School Mascots | 0 | - | 4.47 | 31,955 |
| History of Florida | 0 | - | 4.45 | 9,791 |
| The Life of Martin Luther King Jr. | 0 | - | 4.73 | 11,079 |
| Hawaiian Islands | 0 | - | 4.83 | 42,559 |
| Top 10 Boston Celtics Players | 0 | - | 4.05 | 23,693 |
| Boston Celtics Trivia | 0 | - | 4.12 | 14,855 |
| History of Texas | 0 | - | 4.43 | 14,578 |
| History of Pennsylvania | 0 | - | 4.16 | 7,109 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,201 |
| History of Virginia | 0 | - | 4.31 | 11,573 |
| American History Quotes #1 | 0 | - | 4.37 | 95,818 |
| American History Quotes #2 | 0 | - | 4.38 | 41,295 |
| Old West History | 0 | - | 4.33 | 15,240 |
| Events in U.S. History | 0 | - | 4.40 | 28,568 |
| Life of Benjamin Franklin | 0 | - | 4.24 | 6,508 |
| American Revolution - Multiple Choice | 0 | - | 4.34 | 19,890 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,141 |
| Fifty US States in One Minute | 0 | - | 4.56 | 3,526,773 |
| U.S. State Flags | 0 | - | 4.89 | 168,733 |
| U.S. States that Border Canada | 0 | - | 4.91 | 183,606 |
| Category Elimination - U.S. States #1 | 0 | - | 4.88 | 219,479 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 133,211 |
| U.S. States that Start with M - Shape Quiz | 0 | - | 4.94 | 57,861 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 160,909 |
| Countries of Europe After World War II | 0 | - | 4.99 | 187,633 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 155,859 |
