| Play-Doh Presidents | 0 | - | 5.00 | 81,695 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 379,639 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,656,228 |
| The John F. Kennedy Presidency | 0 | - | 4.47 | 43,488 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,463 |
| Most-Visited Countries by U.S. Presidents | 0 | - | 4.96 | 192,594 |
| The Jimmy Carter Presidency | 0 | - | 4.41 | 19,036 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 303,424 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 189,921 |
| Random U.S. Presidents by Picture | 0 | - | 4.39 | 65,842 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,366 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,089 |
| Presidential Actors | 0 | - | 4.36 | 19,069 |
| U.S. President Scramble | 0 | - | 4.40 | 116,225 |
| The Bill Clinton Presidency | 0 | - | 4.22 | 31,354 |
| The George H. W. Bush Presidency | 0 | - | 4.36 | 21,422 |
| The Ronald Reagan Presidency | 0 | - | 4.26 | 24,722 |
| The Richard Nixon Presidency | 0 | - | 4.05 | 21,926 |
| Random U.S. States on a Map | 0 | - | 4.96 | 621,677 |
| Random Sequential U.S. States on a Map | 0 | - | 4.99 | 233,242 |
| The Barack Obama Presidency | 0 | - | 4.16 | 25,258 |
| U.S. Vice Presidents | 0 | - | 4.41 | 134,982 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 107,986 |
| U.S. Presidents by Event | 0 | - | 4.58 | 33,543 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 93,032 |
| Presidential Middle Names | 0 | - | 4.41 | 59,724 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 52,758 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 93,849 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,181 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,757 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 69,448 |
| U.S. Presidents by Picture - Multiple Choice | 0 | - | 4.49 | 28,604 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,703 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,169 |
| First Ladies of the United States | 0 | - | 4.28 | 85,254 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,116 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 76,334 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,005 |
| Add a Letter - Make a U.S. President | 0 | - | 4.61 | 23,841 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,366 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 128,704 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,693 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,818 |
| George Bush... or George Bush | 0 | - | 3.98 | 8,182 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,317 |
| United States Map Quiz | 0 | - | 4.98 | 4,142,370 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 28,463 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,663 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,510 |
| The John Adams Presidency | 0 | - | 4.12 | 8,680 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,685 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,776 |
| U.S. Map with Random Merged States | 0 | - | 4.94 | 300,097 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 19,961 |
| The George Washington Presidency | 0 | - | 4.03 | 14,477 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,871 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,221 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,610 |
| Colonies of the Americas in 1775 with a Map | 0 | - | 4.88 | 19,224 |
| Countries of the Soviet Union | 0 | - | 4.98 | 193,875 |
| Vatican City Country Quiz | 0 | - | 4.53 | 44,013 |
| Most-Visited Countries by Popes | 0 | - | 4.55 | 83,196 |
| George Washington... or George W. Bush? | 0 | - | 4.16 | 12,218 |
| U.S. State Border Crossings | 0 | - | 4.97 | 95,974 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,374 |
| Third Most Common Language by U.S. State | 0 | - | 4.89 | 113,383 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 74,892 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 73,095 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 39,517 |
| US States Quiz | 0 | - | 5.00 | 16,707,226 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 67,534 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 148,997 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,460 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,461 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,150 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,047 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,257 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 105,944 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 80,713 |
| Name the U.S. National Parks | 0 | - | 4.86 | 59,068 |
| Total United States Immigration by Country | 0 | - | 4.91 | 110,680 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 173,215 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 241,032 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 328,131 |
| Pixelated United States Map | 0 | - | 4.89 | 93,513 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 108,505 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 90,896 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 28,885 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,540 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.49 | 11,670 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.84 | 65,650 |
| Six Flags Over Texas | 0 | - | 4.79 | 63,020 |
| U.S. History for Dummies | 0 | - | 4.47 | 82,500 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 116,770 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 110,392 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 112,447 |
| U.S. States with Short Names | 0 | - | 4.91 | 147,712 |
| U.S. States that Start with M | 0 | - | 4.93 | 185,958 |
| U.S. States By Population | 0 | - | 4.92 | 152,404 |
| U.S. States that Start with N | 0 | - | 4.95 | 170,441 |
| U.S. States with Longest Names | 0 | - | 4.84 | 43,888 |
| US States with an Empty Map | 0 | - | 5.00 | 619,040 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 81,923 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 365,334 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 87,581 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 63,773 |
| The Only Remaining U.S. State . . . | 0 | - | 4.92 | 64,915 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 158,902 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 177,095 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 124,518 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,082 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 85,673 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.84 | 66,860 |
| All Modern-Day Countries Ever Controlled by Greeks | 0 | - | 4.98 | 53,483 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 60,397 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 114,958 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,154 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 85,542 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,344 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,296 |
| All Modern-Day Countries Ever Controlled by Chinese People | 0 | - | 4.82 | 54,309 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 38,816 |
| Rivers of the United States | 0 | - | 4.93 | 65,543 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 145,448 |
| Countries that Beat the United States | 0 | - | 4.93 | 165,625 |
| U.S. Presidents True or False | 0 | - | 3.96 | 15,531 |
| The Kennedy Family | 0 | - | 3.90 | 14,026 |
| American Founding Fathers | 0 | - | 4.41 | 23,074 |
| American Revolution Decoder | 0 | - | 4.10 | 20,879 |
| Countries Closest to Alaska | 0 | - | 4.93 | 123,345 |
| Countries Closest to Maine | 0 | - | 4.84 | 66,466 |
| People on Money - United States | 0 | - | 4.31 | 63,207 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,251 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 44,738 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 32,996 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,648 |
| The Most Recent... United States | 0 | - | 4.45 | 18,297 |
| The American Civil War | 0 | - | 4.62 | 52,170 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 502,078 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 47,624 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 206,802 |
| Great Plains States and Provinces on a Map | 0 | - | 4.95 | 48,617 |
| Cartoon Versions of U.S. States | 0 | - | 4.77 | 63,541 |
| Draw All US State Borders | 0 | - | 4.99 | 133,738 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 123,894 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 124,686 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 91,107 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,122 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 81,954 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,560 |
| U.S. States or European Countries by Area | 0 | - | 4.94 | 94,768 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 131,988 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 164,537 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 102,708 |
| All Modern-Day Countries Ever Controlled by French People | 0 | - | 4.99 | 57,551 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 97,868 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 236,360 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 69,239 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 81,845 |
| Countries Bordering China Since 1914 | 0 | - | 4.93 | 94,754 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 88,477 |
| Colonies of Africa with a Map | 0 | - | 4.77 | 53,966 |
| Most-Spoken Languages of the United States | 0 | - | 4.52 | 216,819 |
| Countries Closest to United States A-Z | 0 | - | 4.81 | 117,441 |
| Most Common High School Mascots | 0 | - | 4.47 | 31,846 |
| U.S. Presidents by State | 0 | - | 4.34 | 68,489 |
| The American Revolution | 0 | - | 4.52 | 54,062 |
| Stephen Curry Quiz | 0 | - | 4.36 | 66,386 |
| History of Florida | 0 | - | 4.45 | 9,767 |
| The Life of Martin Luther King Jr. | 0 | - | 4.73 | 11,060 |
| Hawaiian Islands | 0 | - | 4.83 | 42,437 |
| History of Texas | 0 | - | 4.43 | 14,554 |
| LeBron James Trivia | 0 | - | 4.01 | 169,946 |
| LeBron... or Kobe? | 0 | - | 4.04 | 69,235 |
| History of Pennsylvania | 0 | - | 4.16 | 7,089 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,098 |
| History of Virginia | 0 | - | 4.31 | 11,556 |
| American History Quotes #1 | 0 | - | 4.37 | 95,699 |
| American History Quotes #2 | 0 | - | 4.38 | 41,231 |
| Old West History | 0 | - | 4.33 | 15,225 |
| Events in U.S. History | 0 | - | 4.40 | 28,491 |
| Life of Benjamin Franklin | 0 | - | 4.24 | 6,493 |
| American Revolution - Multiple Choice | 0 | - | 4.34 | 19,853 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,081 |
| Fifty US States in One Minute | 0 | - | 4.56 | 3,519,275 |
| U.S. State Flags | 0 | - | 4.89 | 167,213 |
| U.S. States that Border Canada | 0 | - | 4.91 | 182,544 |
| Category Elimination - U.S. States #1 | 0 | - | 4.87 | 218,619 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 132,568 |
| U.S. States that Start with M - Shape Quiz | 0 | - | 4.94 | 57,671 |
| Name a Valid U.S. President by Birth State | 0 | - | 4.60 | 9,670 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 160,508 |
| Countries of Europe After World War II | 0 | - | 4.99 | 186,790 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 155,403 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 88,075 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 72,511 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,313 |
| Biggest Roman Empire Countries | 0 | - | 4.87 | 101,400 |
| Modern-Day Countries of the Roman Empire on a Map | 0 | - | 4.99 | 124,783 |
| Top 100 Harry Potter Characters by Mention | 0 | - | 4.93 | 389,966 |
