| U.S. Presidents by Picture | 0 | - | 4.87 | 428,219 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,800 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 383,370 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,721,970 |
| The John F. Kennedy Presidency | 0 | - | 4.47 | 43,908 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,326 |
| The Jimmy Carter Presidency | 0 | - | 4.41 | 19,209 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 306,066 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,901 |
| Most-Visited Countries by U.S. Presidents | 0 | - | 4.96 | 194,331 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,596 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,264 |
| Name a Valid U.S. President #1 | 0 | - | 4.90 | 193,578 |
| Presidential Actors | 0 | - | 4.36 | 19,239 |
| The Bill Clinton Presidency | 0 | - | 4.24 | 31,522 |
| The George H. W. Bush Presidency | 0 | - | 4.36 | 21,545 |
| The Ronald Reagan Presidency | 0 | - | 4.26 | 24,879 |
| The Richard Nixon Presidency | 0 | - | 4.05 | 22,085 |
| U.S. President Scramble | 0 | - | 4.40 | 117,399 |
| Random U.S. Presidents by Picture | 0 | - | 4.40 | 66,549 |
| The Barack Obama Presidency | 0 | - | 4.13 | 25,492 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 109,286 |
| U.S. Presidents by Event | 0 | - | 4.58 | 35,222 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.62 | 94,550 |
| Presidential Middle Names | 0 | - | 4.41 | 60,667 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,609 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,866 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 35,176 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,605 |
| Random Sequential U.S. States on a Map | 0 | - | 4.99 | 235,133 |
| George Bush... or George Bush | 0 | - | 3.98 | 8,232 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 70,522 |
| Random U.S. States on a Map | 0 | - | 4.96 | 629,690 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,894 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,353 |
| U.S. Presidential Running Mates | 0 | - | 4.41 | 28,750 |
| First Ladies of the United States | 0 | - | 4.28 | 85,912 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,299 |
| U.S. Presidents in Order by First Letter | 0 | - | 4.32 | 77,434 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,343 |
| Add a Letter - Make a U.S. President | 0 | - | 4.58 | 24,081 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,791 |
| Win the 1828 U.S. Presidential Election | 0 | - | 4.30 | 56,853 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 129,587 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,931 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.42 | 24,054 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 48,065 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,659 |
| U.S. Map with Random Merged States | 0 | - | 4.94 | 303,708 |
| Most-Visited Countries by Popes | 0 | - | 4.56 | 84,108 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,770 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,743 |
| The John Adams Presidency | 0 | - | 4.12 | 8,779 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,772 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,915 |
| U.S. Presidents by Picture - Multiple Choice | 0 | - | 4.50 | 29,008 |
| Colonies of the Americas in 1775 with a Map | 0 | - | 4.88 | 19,911 |
| United States Map Quiz | 0 | - | 4.98 | 4,169,403 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 20,141 |
| The George Washington Presidency | 0 | - | 4.03 | 14,597 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,977 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,371 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,751 |
| Countries of the Soviet Union | 0 | - | 4.98 | 195,467 |
| Top 100 Harry Potter Characters by Mention | 0 | - | 4.93 | 396,844 |
| Vatican City Country Quiz | 0 | - | 4.53 | 44,624 |
| George Washington... or George W. Bush? | 0 | - | 4.16 | 12,296 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,822 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,708 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,945 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,868 |
| Cities and Towns of Massachusetts | 0 | - | 4.93 | 74,896 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 40,211 |
| US States Quiz | 0 | - | 5.00 | 16,977,455 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 368,451 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 70,212 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,199 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 85,053 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,628 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,722 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,475 |
| Soviet Union Country Quiz | 0 | - | 4.91 | 81,090 |
| Name the U.S. National Parks | 0 | - | 4.86 | 60,407 |
| Total United States Immigration by Country | 0 | - | 4.91 | 112,267 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 175,408 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 246,083 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 334,947 |
| Pixelated United States Map | 0 | - | 4.88 | 94,736 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 110,411 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 92,352 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,137 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 73,064 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,854 |
| U.S. Presidents True or False | 0 | - | 3.96 | 15,640 |
| The Kennedy Family | 0 | - | 3.90 | 14,095 |
| American Revolution Decoder | 0 | - | 4.12 | 20,987 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,657 |
| Six Flags Over Texas | 0 | - | 4.78 | 63,575 |
| U.S. History for Dummies | 0 | - | 4.47 | 83,367 |
| The Most Recent... United States | 0 | - | 4.46 | 18,558 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 118,945 |
| U.S. States with the Letter Y | 0 | - | 4.86 | 112,162 |
| 10 Southernmost U.S. States | 0 | - | 4.89 | 114,179 |
| U.S. States with Short Names | 0 | - | 4.91 | 150,222 |
| U.S. States that Start with M | 0 | - | 4.93 | 188,221 |
| U.S. States By Population | 0 | - | 4.92 | 154,066 |
| U.S. States that Start with N | 0 | - | 4.95 | 172,118 |
| U.S. States with Longest Names | 0 | - | 4.85 | 44,826 |
| US States with an Empty Map | 0 | - | 5.00 | 628,019 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 83,002 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,792 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,495 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 66,026 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 160,595 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 178,139 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 125,616 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,791 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 86,603 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.85 | 67,944 |
| All Modern-Day Countries Ever Controlled by Greeks | 0 | - | 4.98 | 54,590 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 61,572 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 116,713 |
| Countries of Iberia in History with a Map | 0 | - | 4.88 | 42,322 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,796 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,603 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,993 |
| All Modern-Day Countries Ever Controlled by Chinese People | 0 | - | 4.81 | 55,130 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,412 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 81,646 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,357 |
| Rivers of the United States | 0 | - | 4.93 | 66,592 |
| Names of Generations | 0 | - | 4.09 | 45,449 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 118,624 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 147,080 |
| Countries that Beat the United States | 0 | - | 4.93 | 168,496 |
| U.S. Presidents by State | 0 | - | 4.34 | 68,822 |
| American Founding Fathers | 0 | - | 4.42 | 23,269 |
| The American Revolution | 0 | - | 4.52 | 54,342 |
| Countries Closest to Alaska | 0 | - | 4.93 | 125,014 |
| Stephen Curry Quiz | 0 | - | 4.37 | 67,275 |
| History of Florida | 0 | - | 4.45 | 9,869 |
| Hawaiian Islands | 0 | - | 4.83 | 42,911 |
| Countries Closest to Maine | 0 | - | 4.85 | 67,523 |
| History of Texas | 0 | - | 4.43 | 14,680 |
| LeBron James Trivia | 0 | - | 4.01 | 171,516 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,479 |
| American History Quotes #1 | 0 | - | 4.37 | 96,182 |
| People on Money - United States | 0 | - | 4.31 | 63,423 |
| American History Quotes #2 | 0 | - | 4.38 | 41,494 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,574 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,193 |
| Events in U.S. History | 0 | - | 4.41 | 28,798 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,183 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,772 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,326 |
| The American Civil War | 0 | - | 4.62 | 52,608 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 509,602 |
| U.S. State Flags | 0 | - | 4.89 | 172,530 |
| U.S. States that Border Canada | 0 | - | 4.91 | 186,423 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 49,188 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 210,362 |
| Great Plains States and Provinces on a Map | 0 | - | 4.95 | 50,023 |
| Draw All US State Borders | 0 | - | 4.99 | 140,316 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 125,767 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 126,380 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 92,734 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 102,368 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,971 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.83 | 62,172 |
| U.S. States that Start with M - Shape Quiz | 0 | - | 4.94 | 58,394 |
| Name a Valid U.S. President by Birth State | 0 | - | 4.60 | 9,848 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 96,914 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 162,186 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 134,036 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 166,351 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 104,552 |
| All Modern-Day Countries Ever Controlled by French People | 0 | - | 4.99 | 58,446 |
| Biggest Roman Empire Countries | 0 | - | 4.87 | 102,254 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 99,002 |
| Harry Potter Last Names | 0 | - | 4.64 | 951,398 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 238,153 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 70,436 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 83,307 |
| The Vietnam War | 0 | - | 4.44 | 35,634 |
| Countries Bordering China Since 1914 | 0 | - | 4.92 | 95,788 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 89,855 |
| Most-Spoken Languages of the United States | 0 | - | 4.52 | 222,139 |
| Territories of the United States | 0 | - | 4.80 | 52,591 |
| Five Biggest Immigrant Groups by Decade in the US | 0 | - | 4.79 | 39,847 |
| Most Mentioned Enemies of the USA | 0 | - | 4.77 | 176,022 |
| U.S. Five-Star Generals and Admirals | 0 | - | 4.33 | 8,357 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 52,480 |
| Name a Valid Answer - United States #1 | 0 | - | 4.62 | 94,342 |
| Most Common High School Mascots | 0 | - | 4.47 | 32,287 |
| Three Real and One Fake - U.S. History | 0 | - | 4.33 | 25,833 |
| The Life of Martin Luther King Jr. | 0 | - | 4.73 | 11,133 |
| New York City Geography | 0 | - | 4.43 | 33,176 |
| LeBron... or Kobe? | 0 | - | 4.04 | 70,409 |
| Cleveland Browns QBs Since 1999 | 0 | - | 4.31 | 7,858 |
| History of Pennsylvania | 0 | - | 4.16 | 7,162 |
