| U.S. Presidents by Picture | 0 | - | 4.85 | 391,732 |
| Play-Doh Presidents | 0 | - | 5.00 | 73,812 |
| Name a Valid U.S. President #1 | 0 | - | 4.93 | 164,788 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 350,775 |
| The John F. Kennedy Presidency | 0 | - | 4.45 | 40,763 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,133,542 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.46 | 20,692 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 44,893 |
| US Presidents - 1 Minute Sprint | 0 | - | 4.44 | 275,887 |
| Name a Valid U.S. President #2 | 0 | - | 4.52 | 51,529 |
| U.S. President Scramble | 0 | - | 4.39 | 90,136 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.41 | 22,421 |
| Presidential Actors | 0 | - | 4.33 | 17,691 |
| The George W. Bush Presidency | 0 | - | 4.06 | 30,823 |
| The Barack Obama Presidency | 0 | - | 4.20 | 23,467 |
| Random U.S. States on a Map | 0 | - | 4.95 | 477,455 |
| U.S. Vice Presidents | 0 | - | 4.42 | 118,030 |
| U.S. Presidential Quotes | 0 | - | 4.35 | 42,592 |
| U.S. Presidential Trivia #1 | 0 | - | 4.51 | 96,109 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.56 | 80,473 |
| U.S. Presidential Trivia #2 | 0 | - | 4.51 | 39,221 |
| Assassinated U.S. Presidents | 0 | - | 4.54 | 79,408 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 33,400 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.31 | 16,714 |
| Random U.S. Presidents by Picture | 0 | - | 4.37 | 58,330 |
| Governors Who Ran For President | 0 | - | 4.46 | 18,830 |
| U.S. Presidents by Event | 0 | - | 4.57 | 28,885 |
| First Ladies of the United States | 0 | - | 4.27 | 79,427 |
| Presidential Middle Names | 0 | - | 4.36 | 55,876 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 24,751 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.31 | 62,541 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 37,287 |
| Random U.S. Vice President to President | 0 | - | 4.57 | 23,025 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.62 | 13,726 |
| George Bush... or George Bush | 0 | - | 3.89 | 7,686 |
| Add a Letter - Make a U.S. President | 0 | - | 4.66 | 21,759 |
| The Bill Clinton Presidency | 0 | - | 4.18 | 30,086 |
| The George H. W. Bush Presidency | 0 | - | 4.35 | 20,477 |
| The Ronald Reagan Presidency | 0 | - | 4.25 | 23,525 |
| The Richard Nixon Presidency | 0 | - | 4.10 | 20,722 |
| The Jimmy Carter Presidency | 0 | - | 4.39 | 17,964 |
| U.S. Presidents Who Died in Office | 0 | - | 4.72 | 31,021 |
| The American Revolution | 0 | - | 4.55 | 51,459 |
| Deadliest U.S. Wars | 0 | - | 4.82 | 156,813 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 121,960 |
| U.S. Senators by State | 0 | - | 4.49 | 35,855 |
| Six Flags Over Texas | 0 | - | 4.84 | 58,402 |
| Random Sequential U.S. States on a Map | 0 | - | 4.99 | 217,117 |
| Vatican City Country Quiz | 0 | - | 4.48 | 38,463 |
| The Iraq War | 0 | - | 4.43 | 14,263 |
| United States Map Quiz | 0 | - | 4.98 | 3,880,718 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 25,452 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.75 | 19,212 |
| The George Washington Presidency | 0 | - | 4.02 | 13,567 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 12,800 |
| The John Adams Presidency | 0 | - | 4.10 | 7,916 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.32 | 10,655 |
| The Theodore Roosevelt Presidency | 0 | - | 4.30 | 7,094 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.32 | 20,415 |
| U.S. Vice Presidential Trivia | 0 | - | 4.29 | 11,230 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 29,838 |
| The Kennedy Family | 0 | - | 3.85 | 13,187 |
| Cartoon Versions of U.S. States | 0 | - | 4.84 | 50,970 |
| Third Most Common Language by U.S. State | 0 | - | 4.90 | 106,034 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.90 | 47,725 |
| Countries of the Soviet Union | 0 | - | 4.98 | 183,457 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 73,902 |
| Biggest Spanish Empire Countries | 0 | - | 4.90 | 91,851 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 98,316 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.83 | 54,046 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 92,361 |
| U.S. State Border Crossings | 0 | - | 4.96 | 81,419 |
| U.S. Citizenship Test Questions | 0 | - | 4.86 | 220,523 |
| Five Biggest Immigrant Groups by Decade in the US | 0 | - | 4.82 | 32,411 |
| Total United States Immigration by Country | 0 | - | 4.89 | 95,853 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 64,608 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.93 | 145,099 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.95 | 181,969 |
| U.S. Cabinet Departments | 0 | - | 4.85 | 67,255 |
| Most-Visited Countries by U.S. Presidents | 0 | - | 4.97 | 176,826 |
| Cities and Towns of Massachusetts | 0 | - | 4.89 | 59,197 |
| US States Quiz | 0 | - | 5.00 | 14,568,445 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.97 | 338,117 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 132,467 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 61,639 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.93 | 48,031 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.97 | 57,730 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 45,738 |
| The United States... or the United Kingdom? | 0 | - | 4.89 | 89,497 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 220,882 |
| Most-Visited Countries by Popes | 0 | - | 4.67 | 62,329 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 59,852 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 66,767 |
| Vietnam War Countries | 0 | - | 4.80 | 85,473 |
| Countries Bordering China Since 1914 | 0 | - | 4.91 | 87,140 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 76,992 |
| Biggest Mongol Empire Countries | 0 | - | 4.91 | 66,807 |
| 10 Longest Rivers in the United States | 0 | - | 4.82 | 34,655 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.95 | 269,589 |
| Pixelated United States Map | 0 | - | 4.91 | 81,273 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 91,945 |
| Countries that Visit the United States the Most | 0 | - | 4.95 | 77,523 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 123,315 |
| Countries that Beat the United States | 0 | - | 4.92 | 143,624 |
| All U.S. Supreme Court Justices | 0 | - | 4.49 | 27,200 |
| U.S. Presidents True or False | 0 | - | 3.94 | 14,539 |
| California A-Z | 0 | - | 4.48 | 27,735 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.84 | 21,042 |
| American History Quotes #1 | 0 | - | 4.43 | 91,049 |
| U.S. History for Dummies | 0 | - | 4.50 | 64,698 |
| The American Civil War | 0 | - | 4.72 | 48,657 |
| U.S. Civil War Decoder | 0 | - | 4.16 | 23,952 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 99,346 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 455,785 |
| U.S. States with the Letter Y | 0 | - | 4.86 | 95,039 |
| 10 Southernmost U.S. States | 0 | - | 4.84 | 98,037 |
| U.S. States with Short Names | 0 | - | 4.87 | 128,253 |
| U.S. States that Start with M | 0 | - | 4.91 | 149,107 |
| U.S. States By Population | 0 | - | 4.90 | 129,182 |
| U.S. States that Start with N | 0 | - | 4.95 | 154,258 |
| U.S. States with Longest Names | 0 | - | 4.84 | 35,461 |
| Louisiana Purchase with a Map | 0 | - | 4.94 | 35,453 |
| US States with an Empty Map | 0 | - | 5.00 | 548,486 |
| 10 Northernmost U.S. States | 0 | - | 4.86 | 59,641 |
| U.S. States with a Unique First Letter | 0 | - | 4.95 | 77,012 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 57,840 |
| The Only Remaining U.S. State . . . | 0 | - | 4.94 | 54,865 |
| U.S. States with the Longest International Borders | 0 | - | 4.81 | 39,858 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 144,300 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 167,059 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.85 | 98,492 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.89 | 88,351 |
| U.S. States with the Most Immigrants | 0 | - | 4.86 | 72,617 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 70,293 |
| U.S. States or European Countries by Population | 0 | - | 4.98 | 114,857 |
| Countries that Bordered the USSR | 0 | - | 4.94 | 141,445 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 87,475 |
| Biggest Roman Empire Countries | 0 | - | 4.88 | 81,449 |
| Ultimate Harry Potter Name Game | 0 | - | 4.95 | 461,697 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 70,742 |
| Most Guessed North American Teams by Sport | 0 | - | 4.30 | 54,696 |
| Rivers of the United States | 0 | - | 4.93 | 49,042 |
| Countries Closest to United States A-Z | 0 | - | 4.86 | 106,263 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.31 | 10,264 |
| Countries Closest to Alaska | 0 | - | 4.92 | 98,113 |
| Top 10 Los Angeles Lakers of All-Time | 0 | - | 4.33 | 41,120 |
| History of Florida | 0 | - | 4.44 | 8,668 |
| Hawaiian Islands | 0 | - | 4.85 | 38,238 |
| Hawaiian Islands Map Quiz | 0 | - | 4.88 | 20,890 |
| Countries Closest to Maine | 0 | - | 4.84 | 58,296 |
| History of Texas | 0 | - | 4.41 | 13,419 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 57,617 |
| People on Money - United States | 0 | - | 4.31 | 61,620 |
| American History Quotes #2 | 0 | - | 4.34 | 39,092 |
| U.S. History Groups of Two | 0 | - | 4.27 | 35,115 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.19 | 41,000 |
| Last Names in U.S. History #1 | 0 | - | 4.24 | 34,081 |
| U.S. State Flags | 0 | - | 4.87 | 134,070 |
| U.S. States that Border Canada | 0 | - | 4.90 | 164,902 |
| Name a Valid U.S. State #1 | 0 | - | 4.95 | 182,723 |
| Great Plains States and Provinces on a Map | 0 | - | 4.94 | 37,183 |
| Top 10 Coldest U.S. States | 0 | - | 4.91 | 99,280 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 99,823 |
| Top 10 Most Native American U.S. States | 0 | - | 4.84 | 70,292 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 56,883 |
| U.S. State Shapes Quiz #2 | 0 | - | 4.82 | 90,444 |
| U.S. States that Start with M - Shape Quiz | 0 | - | 4.93 | 51,489 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 130,030 |
| U.S. History Multiple Choice #5 | 0 | - | 4.34 | 10,268 |
| Modern-Day Countries of the Roman Empire on a Map | 0 | - | 4.99 | 110,276 |
| Groups of Things - Harry Potter | 0 | - | 4.85 | 258,769 |
| Top 100 Harry Potter Characters by Mention | 0 | - | 4.93 | 345,785 |
| Countries of Asia in 1900 | 0 | - | 4.49 | 52,957 |
| Random Sequential Asian Countries on a Map | 0 | - | 4.99 | 106,895 |
| The Persian Gulf War | 0 | - | 3.98 | 7,652 |
| The Vietnam War | 0 | - | 4.41 | 32,553 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 97,700 |
| Colonies of Africa with a Map | 0 | - | 4.80 | 47,878 |
| Random Sequential African Countries on a Map | 0 | - | 5.00 | 115,436 |
| Random American Countries on a Map | 0 | - | 4.95 | 85,184 |
| Most-Spoken Languages of the United States | 0 | - | 4.45 | 162,749 |
| Territories of the United States | 0 | - | 4.76 | 48,204 |
| Most Mentioned Enemies of the USA | 0 | - | 4.79 | 158,452 |
| U.S. Five-Star Generals and Admirals | 0 | - | 4.38 | 7,840 |
| Major non-NATO U.S. Allies | 0 | - | 4.43 | 33,136 |
| Name a Valid Answer - United States #1 | 0 | - | 4.70 | 84,668 |
| U.S. Highway Signs By State | 0 | - | 4.42 | 14,032 |
| American Founding Fathers | 0 | - | 4.36 | 22,039 |
| Golden State Warriors Trivia | 0 | - | 4.21 | 21,756 |
| Los Angeles Lakers Trivia | 0 | - | 4.06 | 17,360 |
| The Life of Martin Luther King Jr. | 0 | - | 4.79 | 10,294 |
| Top 10 Boston Red Sox of All-Time | 0 | - | 4.08 | 10,929 |
| Top 10 Boston Celtics Players | 0 | - | 4.08 | 20,746 |
| Boston Celtics Trivia | 0 | - | 4.26 | 11,142 |
| Top 15 New York Yankees of All-Time | 0 | - | 4.07 | 23,955 |
| History of Pennsylvania | 0 | - | 4.09 | 6,394 |
| History of Virginia | 0 | - | 4.33 | 10,895 |
| Washington Counties | 0 | - | 4.92 | 19,197 |
| Old West History | 0 | - | 4.28 | 14,761 |
| The Life of Thomas Edison | 0 | - | 4.03 | 4,632 |
