| U.S. Presidents Quiz | 0 | - | 5.00 | 3,720,698 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 193,499 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 129,561 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 428,110 |
| Vietnam War Countries | 0 | - | 4.82 | 94,529 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,781 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 24,045 |
| The American Revolution | 0 | - | 4.52 | 54,334 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 70,496 |
| Category Elimination - U.S. States #1 | 0 | - | 4.88 | 222,157 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 135,371 |
| Random U.S. States on a Map | 0 | - | 4.96 | 629,502 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 109,252 |
| U.S. Presidents by Event | 0 | - | 4.58 | 35,176 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.62 | 94,517 |
| Presidential Middle Names | 0 | - | 4.41 | 60,653 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,593 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,854 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 35,169 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,595 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,371 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,620 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 306,019 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 48,058 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 509,395 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 210,296 |
| United States Map Quiz | 0 | - | 4.98 | 4,168,762 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,845 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,346 |
| U.S. Presidential Running Mates | 0 | - | 4.41 | 28,741 |
| First Ladies of the United States | 0 | - | 4.28 | 85,904 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,293 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 383,290 |
| U.S. Presidents in Order by First Letter | 0 | - | 4.32 | 77,411 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,335 |
| Add a Letter - Make a U.S. President | 0 | - | 4.58 | 24,076 |
| Win the 1828 U.S. Presidential Election | 0 | - | 4.30 | 55,166 |
| The John F. Kennedy Presidency | 0 | - | 4.47 | 43,897 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,927 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 162,152 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 89,584 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,802 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 439,275 |
| Do You Even Know Anything About Shakespeare? | 0 | - | 4.56 | 34,466 |
| The Iraq War | 0 | - | 4.47 | 15,696 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,938 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,260 |
| U.S. President Scramble | 0 | - | 4.40 | 117,377 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,311 |
| American Revolution Decoder | 0 | - | 4.12 | 20,986 |
| Fifty US States in One Minute | 0 | - | 4.61 | 3,553,103 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 70,160 |
| Countries of Europe After World War II | 0 | - | 4.99 | 189,177 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 157,248 |
| Countries of the Soviet Union | 0 | - | 4.98 | 195,433 |
| Soviet Union Country Quiz | 0 | - | 4.91 | 81,066 |
| Lord of the Rings Decoder | 0 | - | 4.61 | 42,759 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 104,506 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,802 |
| Name the U.S. National Parks | 0 | - | 4.86 | 60,387 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,671 |
| Total United States Immigration by Country | 0 | - | 4.91 | 112,225 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,849 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 175,362 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 245,983 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 73,062 |
| U.S. Senators by State | 0 | - | 4.44 | 40,081 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 20,140 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,769 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,742 |
| The John Adams Presidency | 0 | - | 4.12 | 8,778 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,769 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,911 |
| The Kennedy Family | 0 | - | 3.90 | 14,093 |
| Cities and Towns of Massachusetts | 0 | - | 4.93 | 74,858 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,632 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 40,204 |
| US States Quiz | 0 | - | 5.00 | 16,971,065 |
| U.S. States by First Two Letters in 30 Seconds | 0 | - | 4.70 | 1,397,290 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 368,390 |
| Books by U.S. State | 0 | - | 4.20 | 14,022 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,158 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 84,928 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,585 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,696 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,447 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 145,426 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 116,671 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,545 |
| Shakespearean Characters | 0 | - | 4.38 | 37,718 |
| Lord of the Rings Characters | 0 | - | 4.54 | 113,594 |
| Asian Countries with the Most Christians | 0 | - | 4.86 | 97,817 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,380 |
| African Countries with the Most Christians | 0 | - | 4.94 | 76,002 |
| Biggest Trading Partners – Australia | 0 | - | 4.93 | 61,921 |
| Countries that Beat Australia | 0 | - | 4.92 | 93,335 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,353 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 334,829 |
| Pixelated United States Map | 0 | - | 4.88 | 94,710 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 110,362 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 92,315 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 147,047 |
| Countries that Beat the United States | 0 | - | 4.93 | 168,428 |
| Arms Exports - United States | 0 | - | 4.77 | 62,659 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,584 |
| Win the U.S. Presidential Election | 0 | - | 4.78 | 634,261 |
| Presidential Actors | 0 | - | 4.36 | 19,236 |
| The George Washington Presidency | 0 | - | 4.03 | 14,595 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,976 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,749 |
| The Barack Obama Presidency | 0 | - | 4.13 | 25,485 |
| California A-Z | 0 | - | 4.49 | 28,835 |
| Six Flags Over Texas | 0 | - | 4.78 | 63,567 |
| U.S. History for Dummies | 0 | - | 4.47 | 83,350 |
| The American Civil War | 0 | - | 4.62 | 52,601 |
| U.S. Civil War Decoder | 0 | - | 4.14 | 25,332 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 118,901 |
| U.S. States by Clue #1 | 0 | - | 4.51 | 39,352 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 112,129 |
| 10 Southernmost U.S. States | 0 | - | 4.89 | 114,128 |
| U.S. States with Short Names | 0 | - | 4.91 | 150,165 |
| U.S. States that Start with M | 0 | - | 4.93 | 188,155 |
| U.S. States By Population | 0 | - | 4.92 | 154,033 |
| U.S. States that Start with N | 0 | - | 4.95 | 172,077 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,804 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 49,165 |
| US States with an Empty Map | 0 | - | 5.00 | 627,801 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 82,978 |
| Name a Valid U.S. State #2 | 0 | - | 4.63 | 77,327 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,772 |
| Name a Valid U.S. State #3 | 0 | - | 4.78 | 49,238 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,482 |
| Draw All US State Borders | 0 | - | 4.99 | 140,182 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 66,002 |
| Tourist Attractions by U.S. State | 0 | - | 4.46 | 62,679 |
| Colleges by U.S. State - Multiple Choice | 0 | - | 4.57 | 23,116 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 160,553 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 178,117 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 125,595 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,780 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 86,593 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 102,340 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,956 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.85 | 67,928 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 96,863 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 133,983 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 166,319 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 104,510 |
| Countries that Beat Germany | 0 | - | 4.94 | 107,165 |
| Countries that Beat Italy | 0 | - | 4.85 | 55,075 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 61,552 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,291 |
| Countries that Beat Spain | 0 | - | 4.94 | 63,256 |
| Countries of Iberia in History with a Map | 0 | - | 4.88 | 42,296 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,769 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,980 |
| Roald Dahl Books | 0 | - | 4.45 | 34,116 |
| Lord of the Rings Characters by Screen Time | 0 | - | 4.55 | 77,594 |
| Commonwealth of Nations Countries | 0 | - | 4.95 | 238,107 |
| Prime Ministers of the UK | 0 | - | 4.95 | 441,690 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 70,416 |
| The Persian Gulf War | 0 | - | 4.02 | 8,477 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,981 |
| Countries that Beat China | 0 | - | 4.85 | 116,590 |
| Countries Bordering China Since 1914 | 0 | - | 4.92 | 95,768 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 89,833 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 81,618 |
| Flag Coloring Book Puzzle #1 | 0 | - | 4.96 | 172,532 |
| Category Elimination - Country Flags #1 | 0 | - | 4.96 | 143,358 |
| George Washington... or George W. Bush? | 0 | - | 4.16 | 12,293 |
| Rivers of the United States | 0 | - | 4.93 | 66,581 |
| Names of Generations | 0 | - | 4.09 | 45,433 |
| American Junk Food Brands #1 | 0 | - | 3.84 | 61,011 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 118,591 |
| Top 10 U.S. States by Republican Party Support | 0 | - | 4.44 | 75,751 |
| Top 10 U.S. States by Democratic Party Support | 0 | - | 4.63 | 81,609 |
| Top 10 U.S. Swing States in the 2024 Election | 0 | - | 4.51 | 75,394 |
| Free in the Answers | 0 | - | 4.08 | 51,689 |
| American Founding Fathers | 0 | - | 4.42 | 23,267 |
| Countries Closest to Alaska | 0 | - | 4.93 | 124,979 |
| Top 10 Los Angeles Lakers of All-Time | 0 | - | 4.24 | 47,146 |
| History of Florida | 0 | - | 4.45 | 9,867 |
| Hawaiian Islands | 0 | - | 4.83 | 42,892 |
| Countries Closest to Maine | 0 | - | 4.85 | 67,500 |
| Harvard University | 0 | - | 4.15 | 8,320 |
| History of Texas | 0 | - | 4.43 | 14,679 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,475 |
| American History Quotes #1 | 0 | - | 4.37 | 96,174 |
| People on Money - United States | 0 | - | 4.31 | 63,416 |
| American History Quotes #2 | 0 | - | 4.38 | 41,489 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,570 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,185 |
| Events in U.S. History | 0 | - | 4.41 | 28,792 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,180 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,767 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,323 |
| U.S. State Flags | 0 | - | 4.89 | 172,355 |
| U.S. States that Border Canada | 0 | - | 4.91 | 186,343 |
| U.S. States by Church Attendance | 0 | - | 4.59 | 32,536 |
| U.S. States with the Most Billionaires | 0 | - | 4.51 | 50,548 |
