| U.S. Presidents Quiz | 0 | - | 5.00 | 3,168,518 |
| Name a Valid U.S. President #1 | 0 | - | 4.93 | 167,005 |
| U.S. Vice Presidents | 0 | - | 4.42 | 119,472 |
| U.S. Presidential Trivia #1 | 0 | - | 4.51 | 96,905 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.56 | 81,543 |
| U.S. Presidential Trivia #2 | 0 | - | 4.51 | 39,692 |
| Assassinated U.S. Presidents | 0 | - | 4.54 | 79,997 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 33,533 |
| Name a Valid U.S. President #2 | 0 | - | 4.52 | 61,161 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 352,924 |
| Governors Who Ran For President | 0 | - | 4.47 | 18,890 |
| U.S. Presidents by Event | 0 | - | 4.58 | 29,091 |
| U.S. Presidential Running Mates | 0 | - | 4.41 | 25,693 |
| First Ladies of the United States | 0 | - | 4.27 | 79,863 |
| Presidential Middle Names | 0 | - | 4.37 | 56,089 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 24,835 |
| Random U.S. Vice President to President | 0 | - | 4.57 | 23,201 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.63 | 13,884 |
| Add a Letter - Make a U.S. President | 0 | - | 4.66 | 21,902 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.41 | 22,514 |
| U.S. Presidents Who Died in Office | 0 | - | 4.75 | 31,204 |
| U.S. Presidents by Picture | 0 | - | 4.85 | 394,364 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 45,089 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 12,865 |
| The John Adams Presidency | 0 | - | 4.10 | 7,966 |
| The Theodore Roosevelt Presidency | 0 | - | 4.31 | 7,139 |
| U.S. Vice Presidential Trivia | 0 | - | 4.29 | 11,394 |
| Play-Doh Presidents | 0 | - | 5.00 | 74,510 |
| The George Washington Presidency | 0 | - | 4.02 | 13,626 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.33 | 10,688 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.32 | 16,796 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.32 | 20,503 |
| Vietnam War Countries | 0 | - | 4.81 | 86,407 |
| US Presidents - 1 Minute Sprint | 0 | - | 4.44 | 278,804 |
| U.S. President Scramble | 0 | - | 4.39 | 90,790 |
| U.S. Senators by State | 0 | - | 4.49 | 36,123 |
| U.S. Presidents True or False | 0 | - | 3.94 | 14,587 |
| The Kennedy Family | 0 | - | 3.85 | 13,262 |
| U.S. Presidential Quotes | 0 | - | 4.36 | 42,706 |
| The John F. Kennedy Presidency | 0 | - | 4.45 | 40,950 |
| Deadliest U.S. Wars | 0 | - | 4.83 | 158,030 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 122,490 |
| Mississippi River States Empty Map Quiz | 0 | - | 4.84 | 50,971 |
| Win the U.S. Presidential Election | 0 | - | 4.79 | 508,215 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.75 | 19,254 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.46 | 20,856 |
| The American Revolution | 0 | - | 4.55 | 51,680 |
| Six Flags Over Texas | 0 | - | 4.84 | 58,733 |
| United States Map Quiz | 0 | - | 4.98 | 3,901,018 |
| The George W. Bush Presidency | 0 | - | 4.06 | 30,900 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 37,505 |
| The Barack Obama Presidency | 0 | - | 4.17 | 23,573 |
| Harvard University | 0 | - | 4.15 | 7,727 |
| The Iraq War | 0 | - | 4.43 | 14,360 |
| Third Most Common Language by U.S. State | 0 | - | 4.91 | 107,011 |
| Rust Belt Cities Map Quiz | 0 | - | 4.55 | 32,158 |
| Top 10 U.S. States by Republican Party Support | 0 | - | 4.43 | 69,077 |
| Top 10 U.S. States by Democratic Party Support | 0 | - | 4.70 | 73,733 |
| Presidential Actors | 0 | - | 4.33 | 17,791 |
| Random U.S. Presidents by Picture | 0 | - | 4.37 | 59,950 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.92 | 49,394 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 76,719 |
| Countries of the Soviet Union | 0 | - | 4.98 | 184,724 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.91 | 99,953 |
| U.S. State Border Crossings | 0 | - | 4.96 | 82,070 |
| U.S. Citizenship Test Questions | 0 | - | 4.86 | 222,060 |
| Five Biggest Immigrant Groups by Decade in the US | 0 | - | 4.83 | 33,197 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.87 | 65,236 |
| Top 10 U.S. Swing States in the 2024 Election | 0 | - | 4.52 | 70,009 |
| The Bill Clinton Presidency | 0 | - | 4.18 | 30,166 |
| The George H. W. Bush Presidency | 0 | - | 4.35 | 20,535 |
| The Ronald Reagan Presidency | 0 | - | 4.25 | 23,605 |
| The Richard Nixon Presidency | 0 | - | 4.10 | 20,813 |
| The Jimmy Carter Presidency | 0 | - | 4.39 | 18,033 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.20 | 30,088 |
| Cities and Towns of Massachusetts | 0 | - | 4.89 | 60,290 |
| US States Quiz | 0 | - | 5.00 | 14,727,869 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.97 | 339,980 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 133,612 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 62,719 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.93 | 49,192 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.97 | 58,666 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 46,386 |
| Soviet Union Country Quiz | 0 | - | 4.91 | 74,462 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.96 | 126,458 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.88 | 51,003 |
| Biggest Spanish Empire Countries | 0 | - | 4.90 | 93,434 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 75,583 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 99,969 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.84 | 54,659 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 67,068 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 93,494 |
| Biggest Mongol Empire Countries | 0 | - | 4.91 | 67,312 |
| Total United States Immigration by Country | 0 | - | 4.89 | 96,612 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.93 | 146,783 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.95 | 184,612 |
| Pixelated United States Map | 0 | - | 4.90 | 82,144 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 93,170 |
| Countries that Visit the United States the Most | 0 | - | 4.95 | 78,560 |
| All U.S. Supreme Court Justices | 0 | - | 4.49 | 27,313 |
| U.S. Cabinet Departments | 0 | - | 4.85 | 67,567 |
| George Bush... or George Bush | 0 | - | 3.89 | 7,705 |
| Las Vegas Casinos Quiz | 0 | - | 4.08 | 35,547 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.83 | 21,573 |
| U.S. History for Dummies | 0 | - | 4.49 | 65,329 |
| U.S. Civil War Decoder | 0 | - | 4.16 | 24,064 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 100,489 |
| U.S. States with the Letter Y | 0 | - | 4.86 | 96,083 |
| 10 Southernmost U.S. States | 0 | - | 4.84 | 99,141 |
| U.S. States with Short Names | 0 | - | 4.87 | 129,586 |
| U.S. States that Start with M | 0 | - | 4.91 | 150,363 |
| U.S. States By Population | 0 | - | 4.90 | 129,930 |
| U.S. States that Start with N | 0 | - | 4.95 | 155,425 |
| U.S. States with Longest Names | 0 | - | 4.84 | 36,004 |
| 10 Northernmost U.S. States | 0 | - | 4.89 | 73,611 |
| U.S. States with a Unique First Letter | 0 | - | 4.95 | 77,756 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 58,307 |
| The Only Remaining U.S. State . . . | 0 | - | 4.94 | 56,026 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 145,309 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 167,842 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.85 | 99,012 |
| Top 10 Newest U.S. States | 0 | - | 4.81 | 68,065 |
| Top 10 Least Obese U.S. States | 0 | - | 4.81 | 68,085 |
| The United States... or the United Kingdom? | 0 | - | 4.89 | 90,198 |
| Ultimate Harry Potter Name Game | 0 | - | 4.95 | 463,560 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 222,024 |
| Vatican City Country Quiz | 0 | - | 4.49 | 39,114 |
| Most-Visited Countries by Popes | 0 | - | 4.63 | 63,449 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 60,584 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 71,589 |
| Countries Bordering China Since 1914 | 0 | - | 4.91 | 87,695 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 77,873 |
| 10 Longest Rivers in the United States | 0 | - | 4.82 | 34,999 |
| Rivers of the United States | 0 | - | 4.91 | 56,910 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.95 | 273,732 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 124,374 |
| Countries that Beat the United States | 0 | - | 4.92 | 145,567 |
| American Revolution Decoder | 0 | - | 4.12 | 19,985 |
| Countries Closest to Alaska | 0 | - | 4.93 | 98,946 |
| California A-Z | 0 | - | 4.48 | 27,808 |
| Top 10 Los Angeles Lakers of All-Time | 0 | - | 4.33 | 41,765 |
| Countries Closest to Maine | 0 | - | 4.85 | 58,898 |
| The American Civil War | 0 | - | 4.72 | 49,009 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 458,892 |
| Louisiana Purchase with a Map | 0 | - | 4.95 | 36,090 |
| US States with an Empty Map | 0 | - | 5.00 | 553,654 |
| Name a Valid U.S. State #1 | 0 | - | 4.95 | 184,626 |
| Great Plains States and Provinces on a Map | 0 | - | 4.94 | 37,953 |
| Draw All US State Borders | 0 | - | 4.99 | 92,976 |
| U.S. States with the Longest International Borders | 0 | - | 4.81 | 40,645 |
| Top 10 Coldest U.S. States | 0 | - | 4.91 | 100,223 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 100,655 |
| Top 10 Most Native American U.S. States | 0 | - | 4.84 | 71,244 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.89 | 89,390 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 73,143 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 57,096 |
| Merged U.S. States | 0 | - | 4.38 | 40,315 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 71,136 |
| U.S. States or European Countries by Population | 0 | - | 4.98 | 116,005 |
| Countries that Bordered the USSR | 0 | - | 4.94 | 151,054 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 88,686 |
| Biggest Roman Empire Countries | 0 | - | 4.88 | 81,982 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 399,360 |
| Countries of Asia in 1900 | 0 | - | 4.49 | 53,353 |
| The Persian Gulf War | 0 | - | 3.98 | 7,695 |
| The Vietnam War | 0 | - | 4.41 | 32,810 |
| Colonies of Africa with a Map | 0 | - | 4.79 | 48,318 |
| Random American Countries on a Map | 0 | - | 4.95 | 86,080 |
| South America Flags Map Quiz | 0 | - | 4.95 | 70,750 |
| Most-Spoken Languages of the United States | 0 | - | 4.45 | 163,617 |
| Countries Closest to United States A-Z | 0 | - | 4.84 | 107,323 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.33 | 10,357 |
| History of Florida | 0 | - | 4.44 | 8,715 |
| The Life of Martin Luther King Jr. | 0 | - | 4.79 | 10,355 |
| Hawaiian Islands | 0 | - | 4.85 | 38,482 |
| Hawaiian Islands Map Quiz | 0 | - | 4.88 | 20,987 |
| Boston Red Sox Trivia | 0 | - | 4.12 | 6,754 |
| New York Yankees Trivia | 0 | - | 4.36 | 5,994 |
| History of Texas | 0 | - | 4.41 | 13,482 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 57,821 |
| American History Quotes #1 | 0 | - | 4.40 | 91,367 |
| People on Money - United States | 0 | - | 4.31 | 61,767 |
| American History Quotes #2 | 0 | - | 4.34 | 39,221 |
| Old West History | 0 | - | 4.28 | 14,784 |
| U.S. History Groups of Two | 0 | - | 4.27 | 35,312 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 41,255 |
| Life of Benjamin Franklin | 0 | - | 4.18 | 6,221 |
| American Revolution - Multiple Choice | 0 | - | 4.32 | 18,801 |
| Last Names in U.S. History #1 | 0 | - | 4.24 | 34,240 |
| Last Names in U.S. History #2 | 0 | - | 4.41 | 15,972 |
| Fifty US States in One Minute | 0 | - | 4.55 | 3,242,701 |
| U.S. State Flags | 0 | - | 4.88 | 136,296 |
| U.S. States that Border Canada | 0 | - | 4.90 | 165,801 |
| Category Elimination - U.S. States #1 | 0 | - | 4.90 | 194,786 |
| Cartoon Versions of U.S. States | 0 | - | 4.84 | 51,926 |
| U.S. State Birds Quiz | 0 | - | 4.35 | 20,546 |
| U.S. State Shapes Quiz #2 | 0 | - | 4.82 | 90,940 |
| U.S. States that Start with M - Shape Quiz | 0 | - | 4.94 | 51,924 |
| Neutral European Countries of WWII | 0 | - | 4.92 | 147,846 |
| Countries of the German Empire | 0 | - | 4.50 | 33,653 |
