| Play-Doh Presidents | 0 | - | 5.00 | 82,126 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 380,988 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,686,575 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,140 |
| The John F. Kennedy Presidency | 0 | - | 4.47 | 43,657 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,612 |
| Most-Visited Countries by U.S. Presidents | 0 | - | 4.96 | 193,325 |
| The Jimmy Carter Presidency | 0 | - | 4.41 | 19,107 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 304,554 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 191,246 |
| Random U.S. Presidents by Picture | 0 | - | 4.40 | 66,126 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,461 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,162 |
| Presidential Actors | 0 | - | 4.36 | 19,142 |
| U.S. President Scramble | 0 | - | 4.40 | 116,609 |
| The Bill Clinton Presidency | 0 | - | 4.24 | 31,428 |
| The George H. W. Bush Presidency | 0 | - | 4.36 | 21,472 |
| The Ronald Reagan Presidency | 0 | - | 4.26 | 24,797 |
| The Richard Nixon Presidency | 0 | - | 4.05 | 21,994 |
| Random U.S. States on a Map | 0 | - | 4.96 | 624,857 |
| Random Sequential U.S. States on a Map | 0 | - | 4.99 | 234,097 |
| The Barack Obama Presidency | 0 | - | 4.16 | 25,359 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 108,497 |
| U.S. Presidents by Event | 0 | - | 4.58 | 34,203 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 93,552 |
| Presidential Middle Names | 0 | - | 4.41 | 60,082 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,158 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,415 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,343 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,925 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 69,833 |
| U.S. Presidents by Picture - Multiple Choice | 0 | - | 4.50 | 28,777 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,832 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,007 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,234 |
| First Ladies of the United States | 0 | - | 4.28 | 85,517 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,194 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 76,902 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,151 |
| Add a Letter - Make a U.S. President | 0 | - | 4.57 | 23,926 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,514 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 129,070 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,786 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,921 |
| George Bush... or George Bush | 0 | - | 3.98 | 8,198 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,464 |
| United States Map Quiz | 0 | - | 4.98 | 4,152,953 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 28,595 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,711 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,611 |
| The John Adams Presidency | 0 | - | 4.12 | 8,728 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,724 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,828 |
| U.S. Map with Random Merged States | 0 | - | 4.94 | 301,889 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 20,027 |
| The George Washington Presidency | 0 | - | 4.03 | 14,528 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,913 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,296 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,653 |
| Colonies of the Americas in 1775 with a Map | 0 | - | 4.88 | 19,469 |
| Countries of the Soviet Union | 0 | - | 4.98 | 194,397 |
| Vatican City Country Quiz | 0 | - | 4.53 | 44,263 |
| Most-Visited Countries by Popes | 0 | - | 4.56 | 83,555 |
| George Washington... or George W. Bush? | 0 | - | 4.16 | 12,257 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,339 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,116 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,628 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,308 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 73,691 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 39,790 |
| US States Quiz | 0 | - | 5.00 | 16,823,892 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 68,718 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,833 |
| Countries of Europe in 1848 | 0 | - | 4.99 | 76,082 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,233 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,670 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,567 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,582 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,567 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 81,123 |
| Name the U.S. National Parks | 0 | - | 4.86 | 59,746 |
| Total United States Immigration by Country | 0 | - | 4.91 | 111,270 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 174,139 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 243,063 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 330,846 |
| Pixelated United States Map | 0 | - | 4.87 | 94,044 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 109,285 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 91,473 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,061 |
| U.S. Cabinet Departments | 0 | - | 4.85 | 72,784 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,750 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,046 |
| Six Flags Over Texas | 0 | - | 4.78 | 63,265 |
| U.S. History for Dummies | 0 | - | 4.47 | 82,904 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 117,606 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 111,120 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 113,164 |
| U.S. States with Short Names | 0 | - | 4.91 | 148,659 |
| U.S. States that Start with M | 0 | - | 4.93 | 186,914 |
| U.S. States By Population | 0 | - | 4.92 | 152,973 |
| U.S. States that Start with N | 0 | - | 4.95 | 171,145 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,299 |
| US States with an Empty Map | 0 | - | 5.00 | 623,050 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 82,358 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 366,501 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,097 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,088 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 65,437 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 159,738 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 177,484 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 125,019 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,412 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 86,089 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.85 | 67,348 |
| All Modern-Day Countries Ever Controlled by Greeks | 0 | - | 4.98 | 53,912 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 60,885 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 115,667 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,496 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,055 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,162 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,533 |
| All Modern-Day Countries Ever Controlled by Chinese People | 0 | - | 4.82 | 54,657 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,085 |
| Rivers of the United States | 0 | - | 4.93 | 66,049 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 146,097 |
| Countries that Beat the United States | 0 | - | 4.93 | 166,476 |
| U.S. Presidents True or False | 0 | - | 3.96 | 15,576 |
| The Kennedy Family | 0 | - | 3.90 | 14,059 |
| American Founding Fathers | 0 | - | 4.42 | 23,198 |
| American Revolution Decoder | 0 | - | 4.10 | 20,930 |
| Countries Closest to Alaska | 0 | - | 4.93 | 124,067 |
| Countries Closest to Maine | 0 | - | 4.85 | 66,944 |
| People on Money - United States | 0 | - | 4.31 | 63,315 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,401 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 44,978 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,087 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,705 |
| The Most Recent... United States | 0 | - | 4.45 | 18,401 |
| The American Civil War | 0 | - | 4.62 | 52,358 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 505,238 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 48,342 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 208,355 |
| Great Plains States and Provinces on a Map | 0 | - | 4.95 | 49,202 |
| Cartoon Versions of U.S. States | 0 | - | 4.77 | 63,800 |
| Draw All US State Borders | 0 | - | 4.99 | 136,378 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 124,444 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 125,352 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 91,769 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,569 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,327 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,818 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 95,662 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 132,834 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 165,121 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 103,442 |
| All Modern-Day Countries Ever Controlled by French People | 0 | - | 4.99 | 57,899 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,331 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 237,131 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 69,657 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 82,422 |
| Countries Bordering China Since 1914 | 0 | - | 4.93 | 95,073 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 89,018 |
| Colonies of Africa with a Map | 0 | - | 4.78 | 54,323 |
| Most-Spoken Languages of the United States | 0 | - | 4.52 | 219,006 |
| Names of Generations | 0 | - | 4.10 | 43,861 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 117,952 |
| Most Common High School Mascots | 0 | - | 4.47 | 32,033 |
| U.S. Presidents by State | 0 | - | 4.34 | 68,630 |
| The American Revolution | 0 | - | 4.52 | 54,207 |
| Stephen Curry Quiz | 0 | - | 4.37 | 66,768 |
| History of Florida | 0 | - | 4.45 | 9,805 |
| The Life of Martin Luther King Jr. | 0 | - | 4.73 | 11,094 |
| Hawaiian Islands | 0 | - | 4.83 | 42,632 |
| History of Texas | 0 | - | 4.43 | 14,601 |
| LeBron James Trivia | 0 | - | 4.01 | 170,598 |
| LeBron... or Kobe? | 0 | - | 4.04 | 69,731 |
| History of Pennsylvania | 0 | - | 4.16 | 7,125 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,260 |
| History of Virginia | 0 | - | 4.31 | 11,586 |
| American History Quotes #1 | 0 | - | 4.37 | 95,945 |
| American History Quotes #2 | 0 | - | 4.38 | 41,366 |
| Old West History | 0 | - | 4.33 | 15,256 |
| Events in U.S. History | 0 | - | 4.40 | 28,606 |
| Life of Benjamin Franklin | 0 | - | 4.24 | 6,515 |
| American Revolution - Multiple Choice | 0 | - | 4.34 | 19,911 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,211 |
| Fifty US States in One Minute | 0 | - | 4.61 | 3,532,732 |
| U.S. State Flags | 0 | - | 4.89 | 169,589 |
| U.S. States that Border Canada | 0 | - | 4.91 | 184,233 |
| Category Elimination - U.S. States #1 | 0 | - | 4.88 | 220,258 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 133,780 |
| U.S. States that Start with M - Shape Quiz | 0 | - | 4.94 | 57,991 |
| Name a Valid U.S. President by Birth State | 0 | - | 4.60 | 9,740 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 161,207 |
| Countries of Europe After World War II | 0 | - | 4.99 | 187,983 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 156,188 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 88,714 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 73,477 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,516 |
| Biggest Roman Empire Countries | 0 | - | 4.87 | 101,728 |
