| U.S. Presidents Quiz | 0 | - | 5.00 | 3,163,850 |
| U.S. Presidents by Picture | 0 | - | 4.85 | 394,042 |
| Play-Doh Presidents | 0 | - | 5.00 | 74,416 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 352,667 |
| Name a Valid U.S. President #1 | 0 | - | 4.93 | 166,688 |
| The John F. Kennedy Presidency | 0 | - | 4.45 | 40,944 |
| U.S. Vice Presidents | 0 | - | 4.42 | 119,257 |
| U.S. Presidential Trivia #1 | 0 | - | 4.51 | 96,806 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.56 | 81,434 |
| U.S. Presidential Trivia #2 | 0 | - | 4.51 | 39,629 |
| Assassinated U.S. Presidents | 0 | - | 4.54 | 79,928 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 33,524 |
| Random U.S. Presidents by Picture | 0 | - | 4.37 | 59,865 |
| US Presidents - 1 Minute Sprint | 0 | - | 4.44 | 278,525 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 37,478 |
| Name a Valid U.S. President #2 | 0 | - | 4.52 | 61,027 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.46 | 20,838 |
| Governors Who Ran For President | 0 | - | 4.47 | 18,878 |
| U.S. Presidents by Event | 0 | - | 4.58 | 29,076 |
| U.S. Presidential Running Mates | 0 | - | 4.41 | 25,670 |
| First Ladies of the United States | 0 | - | 4.27 | 79,817 |
| Presidential Middle Names | 0 | - | 4.37 | 56,072 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 24,827 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.31 | 64,086 |
| Random U.S. Vice President to President | 0 | - | 4.57 | 23,175 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.63 | 13,867 |
| Add a Letter - Make a U.S. President | 0 | - | 4.66 | 21,885 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.20 | 30,057 |
| U.S. Presidential Quotes | 0 | - | 4.35 | 42,685 |
| Presidential Actors | 0 | - | 4.33 | 17,774 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.41 | 22,507 |
| U.S. Presidents Who Died in Office | 0 | - | 4.75 | 31,184 |
| U.S. President Scramble | 0 | - | 4.39 | 90,716 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 45,061 |
| Six Flags Over Texas | 0 | - | 4.84 | 58,675 |
| Deadliest U.S. Wars | 0 | - | 4.82 | 157,857 |
| The Bill Clinton Presidency | 0 | - | 4.18 | 30,156 |
| The George H. W. Bush Presidency | 0 | - | 4.35 | 20,525 |
| The Ronald Reagan Presidency | 0 | - | 4.25 | 23,595 |
| The Richard Nixon Presidency | 0 | - | 4.10 | 20,807 |
| The Jimmy Carter Presidency | 0 | - | 4.39 | 18,021 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 12,857 |
| The John Adams Presidency | 0 | - | 4.10 | 7,961 |
| The Theodore Roosevelt Presidency | 0 | - | 4.31 | 7,133 |
| U.S. Vice Presidential Trivia | 0 | - | 4.29 | 11,377 |
| United States Map Quiz | 0 | - | 4.98 | 3,898,117 |
| The George W. Bush Presidency | 0 | - | 4.06 | 30,889 |
| The George Washington Presidency | 0 | - | 4.02 | 13,619 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.33 | 10,679 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.32 | 16,787 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.32 | 20,495 |
| The Barack Obama Presidency | 0 | - | 4.17 | 23,562 |
| Countries of the Soviet Union | 0 | - | 4.98 | 184,608 |
| Soviet Union Country Quiz | 0 | - | 4.91 | 74,388 |
| U.S. State Border Crossings | 0 | - | 4.96 | 82,013 |
| U.S. Citizenship Test Questions | 0 | - | 4.86 | 221,902 |
| Third Most Common Language by U.S. State | 0 | - | 4.91 | 106,868 |
| Five Biggest Immigrant Groups by Decade in the US | 0 | - | 4.83 | 33,100 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.87 | 65,125 |
| All U.S. Supreme Court Justices | 0 | - | 4.49 | 27,298 |
| Most-Visited Countries by U.S. Presidents | 0 | - | 4.97 | 177,913 |
| Cities and Towns of Massachusetts | 0 | - | 4.89 | 60,184 |
| US States Quiz | 0 | - | 5.00 | 14,706,096 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.97 | 339,730 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.92 | 49,121 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 133,420 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 62,577 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.93 | 49,029 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.97 | 58,537 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 46,283 |
| Biggest Spanish Empire Countries | 0 | - | 4.90 | 93,196 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 99,769 |
| The United States... or the United Kingdom? | 0 | - | 4.89 | 90,096 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 221,810 |
| Vatican City Country Quiz | 0 | - | 4.49 | 39,034 |
| Most-Visited Countries by Popes | 0 | - | 4.63 | 63,319 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.84 | 54,571 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 60,469 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 67,026 |
| Countries Bordering China Since 1914 | 0 | - | 4.91 | 87,541 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 77,731 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 93,332 |
| Biggest Mongol Empire Countries | 0 | - | 4.91 | 67,237 |
| 10 Longest Rivers in the United States | 0 | - | 4.82 | 34,960 |
| Total United States Immigration by Country | 0 | - | 4.89 | 96,512 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.93 | 146,563 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.95 | 184,250 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.95 | 273,221 |
| Pixelated United States Map | 0 | - | 4.90 | 82,009 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 92,984 |
| Countries that Visit the United States the Most | 0 | - | 4.95 | 78,411 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 124,237 |
| Countries that Beat the United States | 0 | - | 4.92 | 145,345 |
| U.S. Cabinet Departments | 0 | - | 4.85 | 67,525 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.75 | 19,247 |
| U.S. Presidents True or False | 0 | - | 3.94 | 14,584 |
| George Bush... or George Bush | 0 | - | 3.89 | 7,704 |
| The Kennedy Family | 0 | - | 3.85 | 13,254 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.84 | 21,489 |
| U.S. History for Dummies | 0 | - | 4.49 | 65,232 |
| The American Civil War | 0 | - | 4.72 | 48,966 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 100,398 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 458,455 |
| U.S. States with the Letter Y | 0 | - | 4.87 | 95,958 |
| 10 Southernmost U.S. States | 0 | - | 4.84 | 99,014 |
| U.S. States with Short Names | 0 | - | 4.87 | 129,435 |
| U.S. States that Start with M | 0 | - | 4.91 | 150,193 |
| U.S. States By Population | 0 | - | 4.90 | 129,839 |
| U.S. States that Start with N | 0 | - | 4.95 | 155,274 |
| U.S. States with Longest Names | 0 | - | 4.84 | 35,952 |
| Louisiana Purchase with a Map | 0 | - | 4.95 | 36,012 |
| US States with an Empty Map | 0 | - | 5.00 | 552,962 |
| 10 Northernmost U.S. States | 0 | - | 4.89 | 73,513 |
| U.S. States with a Unique First Letter | 0 | - | 4.95 | 77,640 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 58,242 |
| The Only Remaining U.S. State . . . | 0 | - | 4.94 | 55,908 |
| U.S. States with the Longest International Borders | 0 | - | 4.81 | 40,529 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 145,185 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 167,761 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.85 | 98,957 |
| Top 10 Newest U.S. States | 0 | - | 4.81 | 68,014 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.89 | 89,270 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 73,084 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 71,025 |
| U.S. States or European Countries by Population | 0 | - | 4.98 | 115,906 |
| Countries that Bordered the USSR | 0 | - | 4.94 | 142,087 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 88,462 |
| Biggest Roman Empire Countries | 0 | - | 4.88 | 81,916 |
| Modern-Day Countries of the Roman Empire on a Map | 0 | - | 4.99 | 111,269 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 71,447 |
| The Vietnam War | 0 | - | 4.41 | 32,779 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 98,325 |
| Rivers of the United States | 0 | - | 4.91 | 56,805 |
| Countries Closest to United States A-Z | 0 | - | 4.86 | 107,227 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.33 | 10,340 |
| U.S. Presidents by State | 0 | - | 4.29 | 65,900 |
| The American Revolution | 0 | - | 4.55 | 51,651 |
| Countries Closest to Alaska | 0 | - | 4.93 | 98,854 |
| History of Florida | 0 | - | 4.44 | 8,710 |
| The Life of Martin Luther King Jr. | 0 | - | 4.79 | 10,349 |
| Hawaiian Islands | 0 | - | 4.85 | 38,463 |
| Hawaiian Islands Map Quiz | 0 | - | 4.88 | 20,974 |
| Countries Closest to Maine | 0 | - | 4.85 | 58,830 |
| History of Texas | 0 | - | 4.41 | 13,477 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 57,797 |
| American History Quotes #1 | 0 | - | 4.40 | 91,322 |
| People on Money - United States | 0 | - | 4.31 | 61,747 |
| American History Quotes #2 | 0 | - | 4.34 | 39,203 |
| Old West History | 0 | - | 4.28 | 14,781 |
| U.S. History Groups of Two | 0 | - | 4.27 | 35,282 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 41,224 |
| Life of Benjamin Franklin | 0 | - | 4.18 | 6,220 |
| American Revolution - Multiple Choice | 0 | - | 4.32 | 18,788 |
| Last Names in U.S. History #1 | 0 | - | 4.24 | 34,223 |
| Last Names in U.S. History #2 | 0 | - | 4.41 | 15,955 |
| Fifty US States in One Minute | 0 | - | 4.55 | 3,238,216 |
| U.S. State Flags | 0 | - | 4.88 | 136,029 |
| U.S. States that Border Canada | 0 | - | 4.90 | 165,700 |
| Name a Valid U.S. State #1 | 0 | - | 4.95 | 184,345 |
| Category Elimination - U.S. States #1 | 0 | - | 4.90 | 194,547 |
| Great Plains States and Provinces on a Map | 0 | - | 4.94 | 37,879 |
| Random U.S. States on a Map | 0 | - | 4.95 | 488,715 |
| Cartoon Versions of U.S. States | 0 | - | 4.84 | 51,821 |
| Top 10 Coldest U.S. States | 0 | - | 4.91 | 99,775 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 100,520 |
| Top 10 Most Native American U.S. States | 0 | - | 4.84 | 71,115 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 57,045 |
| U.S. State Shapes Quiz #2 | 0 | - | 4.82 | 90,884 |
| U.S. States that Start with M - Shape Quiz | 0 | - | 4.94 | 51,877 |
| Name a Valid U.S. President by Birth State | 0 | - | 4.51 | 8,435 |
| Neutral European Countries of WWII | 0 | - | 4.92 | 147,552 |
| Countries of Europe After World War II | 0 | - | 4.98 | 170,464 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 139,106 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 76,463 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.96 | 56,462 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.91 | 99,851 |
| U.S. History Multiple Choice #5 | 0 | - | 4.34 | 10,366 |
| Countries in the Byzantine Empire | 0 | - | 4.95 | 66,567 |
| Biggest British Empire Countries | 0 | - | 4.70 | 79,144 |
| Countries of Asia in 1900 | 0 | - | 4.49 | 53,300 |
| Asian Last Names in the United States | 0 | - | 4.41 | 43,211 |
| The Iraq War | 0 | - | 4.43 | 14,345 |
| Vietnam War Countries | 0 | - | 4.81 | 86,317 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.57 | 51,676 |
| Colonies of Africa with a Map | 0 | - | 4.80 | 48,259 |
| Most-Spoken Languages of the United States | 0 | - | 4.45 | 163,490 |
| U.S. State Nicknames Quiz | 0 | - | 4.49 | 46,062 |
| U.S. National Parks Quiz | 0 | - | 4.79 | 46,649 |
| Territories of the United States | 0 | - | 4.76 | 48,457 |
| Countries with American Expatriates | 0 | - | 4.58 | 40,889 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.18 | 700,055 |
| Most Mentioned Enemies of the USA | 0 | - | 4.79 | 159,640 |
| U.S. Five-Star Generals and Admirals | 0 | - | 4.38 | 7,869 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 38,291 |
| United States Country Quiz | 0 | - | 4.45 | 88,892 |
| Major non-NATO U.S. Allies | 0 | - | 4.43 | 33,373 |
| Busiest Air Routes from the U.S. | 0 | - | 4.46 | 72,377 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 198,496 |
| Name a Valid Answer - United States #1 | 0 | - | 4.66 | 85,269 |
| U.S. Highway Signs By State | 0 | - | 4.43 | 14,128 |
