| U.S. Presidents by Picture | 0 | - | 4.87 | 426,248 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,231 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 191,635 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,694,334 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 381,390 |
| The John F. Kennedy Presidency | 0 | - | 4.47 | 43,715 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 304,843 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 69,952 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,172 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,869 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,183 |
| U.S. Presidents by Picture - Multiple Choice | 0 | - | 4.50 | 28,821 |
| U.S. President Scramble | 0 | - | 4.40 | 116,725 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,947 |
| Presidential Actors | 0 | - | 4.36 | 19,164 |
| The Barack Obama Presidency | 0 | - | 4.13 | 25,390 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,492 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 108,643 |
| U.S. Presidents by Event | 0 | - | 4.58 | 34,387 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 93,726 |
| Presidential Middle Names | 0 | - | 4.41 | 60,187 |
| The Jimmy Carter Presidency | 0 | - | 4.41 | 19,127 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,280 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,545 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,967 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,398 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,317 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,189 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,252 |
| First Ladies of the United States | 0 | - | 4.28 | 85,605 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,217 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 77,037 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,185 |
| George Bush... or George Bush | 0 | - | 3.98 | 8,203 |
| Add a Letter - Make a U.S. President | 0 | - | 4.57 | 23,953 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,557 |
| Random U.S. States on a Map | 0 | - | 4.96 | 625,952 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,816 |
| The Bill Clinton Presidency | 0 | - | 4.24 | 31,449 |
| The George H. W. Bush Presidency | 0 | - | 4.36 | 21,486 |
| The Ronald Reagan Presidency | 0 | - | 4.26 | 24,816 |
| The Richard Nixon Presidency | 0 | - | 4.05 | 22,013 |
| Random U.S. Presidents by Picture | 0 | - | 4.40 | 66,203 |
| The American Revolution | 0 | - | 4.52 | 54,236 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,689 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 129,220 |
| Vietnam War Countries | 0 | - | 4.82 | 94,162 |
| U.S. Senators by State | 0 | - | 4.45 | 39,939 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,661 |
| United States Map Quiz | 0 | - | 4.98 | 4,156,545 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 28,624 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 20,048 |
| The George Washington Presidency | 0 | - | 4.03 | 14,541 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,724 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,642 |
| The John Adams Presidency | 0 | - | 4.12 | 8,743 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,929 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,742 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,671 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,848 |
| The Kennedy Family | 0 | - | 3.90 | 14,066 |
| Vatican City Country Quiz | 0 | - | 4.53 | 44,329 |
| The Iraq War | 0 | - | 4.47 | 15,647 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,701 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 69,023 |
| Countries of the Soviet Union | 0 | - | 4.98 | 194,525 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,689 |
| George Washington... or George W. Bush? | 0 | - | 4.16 | 12,264 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,777 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,441 |
| Name the U.S. National Parks | 0 | - | 4.86 | 59,888 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,347 |
| Total United States Immigration by Country | 0 | - | 4.91 | 111,532 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,417 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 174,368 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 243,708 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,842 |
| Most-Visited Countries by U.S. Presidents | 0 | - | 4.96 | 193,524 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 73,922 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,176 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 39,887 |
| US States Quiz | 0 | - | 5.00 | 16,858,477 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 366,860 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,095 |
| Countries of Europe in 1848 | 0 | - | 4.99 | 80,785 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,533 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,888 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,775 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 115,894 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,480 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 81,217 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,145 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 331,650 |
| Pixelated United States Map | 0 | - | 4.87 | 94,194 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 109,551 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 91,676 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 146,325 |
| Countries that Beat the United States | 0 | - | 4.93 | 166,992 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,069 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,784 |
| U.S. Presidents True or False | 0 | - | 3.96 | 15,594 |
| California A-Z | 0 | - | 4.49 | 28,785 |
| Six Flags Over Texas | 0 | - | 4.78 | 63,331 |
| U.S. History for Dummies | 0 | - | 4.47 | 83,012 |
| The Most Recent... United States | 0 | - | 4.45 | 18,431 |
| The American Civil War | 0 | - | 4.62 | 52,407 |
| U.S. Civil War Decoder | 0 | - | 4.14 | 25,264 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 117,774 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 506,149 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 111,313 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 113,341 |
| U.S. States with Short Names | 0 | - | 4.91 | 148,875 |
| U.S. States that Start with M | 0 | - | 4.93 | 187,150 |
| U.S. States By Population | 0 | - | 4.92 | 153,484 |
| U.S. States that Start with N | 0 | - | 4.95 | 171,349 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,396 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 48,517 |
| US States with an Empty Map | 0 | - | 5.00 | 624,056 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 82,457 |
| Random Sequential U.S. States on a Map | 0 | - | 4.99 | 234,310 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,236 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,175 |
| Draw All US State Borders | 0 | - | 4.99 | 137,216 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 65,561 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 159,889 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 177,654 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 125,142 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,468 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 86,171 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,689 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,429 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.85 | 67,459 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 95,918 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 133,081 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 165,309 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 103,669 |
| All Modern-Day Countries Ever Controlled by Greeks | 0 | - | 4.98 | 54,066 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 61,054 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,770 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,218 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,481 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 237,317 |
| Most-Visited Countries by Popes | 0 | - | 4.56 | 83,670 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 69,827 |
| The Persian Gulf War | 0 | - | 4.02 | 8,449 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,627 |
| Countries Bordering China Since 1914 | 0 | - | 4.93 | 95,198 |
| All Modern-Day Countries Ever Controlled by Chinese People | 0 | - | 4.82 | 54,763 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 89,212 |
| Most Guessed North American Teams by Sport | 0 | - | 4.28 | 64,391 |
| Rivers of the United States | 0 | - | 4.93 | 66,144 |
| Names of Generations | 0 | - | 4.09 | 44,737 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 118,089 |
| American Founding Fathers | 0 | - | 4.42 | 23,218 |
| Countries Closest to Alaska | 0 | - | 4.93 | 124,238 |
| Top 10 Los Angeles Lakers of All-Time | 0 | - | 4.24 | 46,878 |
| History of Florida | 0 | - | 4.45 | 9,823 |
| Hawaiian Islands | 0 | - | 4.83 | 42,683 |
| Countries Closest to Maine | 0 | - | 4.85 | 67,061 |
| History of Texas | 0 | - | 4.43 | 14,620 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,299 |
| American History Quotes #1 | 0 | - | 4.37 | 96,001 |
| People on Money - United States | 0 | - | 4.31 | 63,340 |
| American History Quotes #2 | 0 | - | 4.38 | 41,389 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,435 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,033 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,105 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,721 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,228 |
| U.S. State Flags | 0 | - | 4.89 | 170,165 |
| U.S. States that Border Canada | 0 | - | 4.91 | 184,698 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 208,709 |
| Great Plains States and Provinces on a Map | 0 | - | 4.95 | 49,360 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 124,595 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 125,551 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 91,923 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,870 |
| U.S. States that Start with M - Shape Quiz | 0 | - | 4.94 | 58,083 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 161,390 |
| All Modern-Day Countries Ever Controlled by French People | 0 | - | 4.99 | 58,027 |
| Biggest Roman Empire Countries | 0 | - | 4.87 | 101,826 |
| Ultimate Harry Potter Name Game | 0 | - | 4.94 | 493,198 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 82,626 |
| Colonies of Africa with a Map | 0 | - | 4.78 | 54,408 |
| Random Sequential African Countries on a Map | 0 | - | 5.00 | 127,480 |
| Random American Countries on a Map | 0 | - | 4.96 | 99,435 |
| Most-Spoken Languages of the United States | 0 | - | 4.52 | 219,687 |
| Territories of the United States | 0 | - | 4.79 | 52,367 |
| Five Biggest Immigrant Groups by Decade in the US | 0 | - | 4.79 | 39,644 |
| Most Mentioned Enemies of the USA | 0 | - | 4.77 | 175,388 |
| U.S. Five-Star Generals and Admirals | 0 | - | 4.33 | 8,330 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 52,160 |
| Name a Valid Answer - United States #1 | 0 | - | 4.61 | 93,936 |
| U.S. Highway Signs By State | 0 | - | 4.46 | 15,489 |
| Most Common High School Mascots | 0 | - | 4.47 | 32,094 |
| Three Real and One Fake - U.S. History | 0 | - | 4.33 | 25,769 |
| Golden State Warriors Trivia | 0 | - | 4.25 | 24,892 |
| Los Angeles Lakers Trivia | 0 | - | 4.15 | 26,584 |
| The Life of Martin Luther King Jr. | 0 | - | 4.73 | 11,101 |
| Top 10 Boston Celtics Players | 0 | - | 4.05 | 23,781 |
