| U.S. Presidents by Picture | 0 | - | 4.87 | 424,259 |
| Play-Doh Presidents | 0 | - | 5.00 | 81,780 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 190,217 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 379,926 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,662,985 |
| The John F. Kennedy Presidency | 0 | - | 4.47 | 43,520 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 303,732 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 69,539 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,048 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,731 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,098 |
| U.S. Presidents by Picture - Multiple Choice | 0 | - | 4.49 | 28,639 |
| U.S. President Scramble | 0 | - | 4.40 | 116,312 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,831 |
| Presidential Actors | 0 | - | 4.36 | 19,085 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,378 |
| The Jimmy Carter Presidency | 0 | - | 4.41 | 19,041 |
| The Barack Obama Presidency | 0 | - | 4.16 | 25,272 |
| U.S. Vice Presidents | 0 | - | 4.41 | 135,284 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 108,091 |
| U.S. Presidents by Event | 0 | - | 4.58 | 33,685 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 93,133 |
| Presidential Middle Names | 0 | - | 4.41 | 59,795 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 52,841 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 93,948 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,216 |
| The Bill Clinton Presidency | 0 | - | 4.22 | 31,367 |
| The George H. W. Bush Presidency | 0 | - | 4.36 | 21,428 |
| The Ronald Reagan Presidency | 0 | - | 4.26 | 24,732 |
| The Richard Nixon Presidency | 0 | - | 4.05 | 21,933 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,783 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,496 |
| George Bush... or George Bush | 0 | - | 3.98 | 8,183 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,242 |
| Random U.S. States on a Map | 0 | - | 4.96 | 622,511 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,175 |
| First Ladies of the United States | 0 | - | 4.28 | 85,307 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,127 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 76,484 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,033 |
| Add a Letter - Make a U.S. President | 0 | - | 4.61 | 23,852 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,390 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 128,776 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,708 |
| Most-Visited Countries by U.S. Presidents | 0 | - | 4.96 | 192,741 |
| Random U.S. Presidents by Picture | 0 | - | 4.39 | 65,902 |
| The American Revolution | 0 | - | 4.52 | 54,100 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,475 |
| Vietnam War Countries | 0 | - | 4.83 | 93,736 |
| United States Map Quiz | 0 | - | 4.98 | 4,144,706 |
| U.S. Senators by State | 0 | - | 4.45 | 39,791 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 28,503 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,667 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,531 |
| The John Adams Presidency | 0 | - | 4.12 | 8,686 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,693 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,789 |
| Random Sequential U.S. States on a Map | 0 | - | 4.99 | 233,514 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 19,966 |
| The George Washington Presidency | 0 | - | 4.03 | 14,483 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,888 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,622 |
| The Kennedy Family | 0 | - | 3.90 | 14,029 |
| Countries of the Soviet Union | 0 | - | 4.98 | 194,010 |
| Vatican City Country Quiz | 0 | - | 4.53 | 44,079 |
| The Iraq War | 0 | - | 4.47 | 15,574 |
| George Washington... or George W. Bush? | 0 | - | 4.16 | 12,225 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,053 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,519 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,437 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 74,998 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 73,200 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 39,591 |
| US States Quiz | 0 | - | 5.00 | 16,733,907 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 67,892 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,176 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,624 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,644 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,300 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,184 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,336 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,084 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 80,796 |
| Name the U.S. National Parks | 0 | - | 4.86 | 59,340 |
| Total United States Immigration by Country | 0 | - | 4.91 | 110,807 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 173,414 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 241,468 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 328,819 |
| Pixelated United States Map | 0 | - | 4.89 | 93,637 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 108,689 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 91,003 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 28,911 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,583 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.49 | 11,679 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.84 | 65,743 |
| Six Flags Over Texas | 0 | - | 4.78 | 63,063 |
| U.S. History for Dummies | 0 | - | 4.47 | 82,590 |
| U.S. Civil War Decoder | 0 | - | 4.14 | 25,199 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 116,937 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 110,550 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 112,596 |
| U.S. States with Short Names | 0 | - | 4.91 | 147,899 |
| U.S. States that Start with M | 0 | - | 4.93 | 186,151 |
| U.S. States By Population | 0 | - | 4.92 | 152,528 |
| U.S. States that Start with N | 0 | - | 4.95 | 170,595 |
| U.S. States with Longest Names | 0 | - | 4.84 | 43,984 |
| US States with an Empty Map | 0 | - | 5.00 | 619,878 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 81,996 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 365,590 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 87,720 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 63,838 |
| The Only Remaining U.S. State . . . | 0 | - | 4.92 | 65,009 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 159,223 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 177,176 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 124,605 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,143 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 85,752 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.84 | 66,946 |
| U.S. Map with Random Merged States | 0 | - | 4.94 | 300,359 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 60,490 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 115,159 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,225 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 85,645 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,554 |
| The Persian Gulf War | 0 | - | 4.02 | 8,414 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,352 |
| All Modern-Day Countries Ever Controlled by Chinese People | 0 | - | 4.82 | 54,386 |
| Most Guessed North American Teams by Sport | 0 | - | 4.28 | 63,926 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 38,861 |
| Rivers of the United States | 0 | - | 4.93 | 65,648 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 145,596 |
| Countries that Beat the United States | 0 | - | 4.93 | 165,814 |
| U.S. Presidents True or False | 0 | - | 3.96 | 15,541 |
| American Founding Fathers | 0 | - | 4.41 | 23,085 |
| Countries Closest to Alaska | 0 | - | 4.93 | 123,521 |
| California A-Z | 0 | - | 4.49 | 28,728 |
| Top 10 Los Angeles Lakers of All-Time | 0 | - | 4.24 | 46,584 |
| Countries Closest to Maine | 0 | - | 4.84 | 66,569 |
| People on Money - United States | 0 | - | 4.31 | 63,231 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,285 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 44,762 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,022 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,659 |
| The Most Recent... United States | 0 | - | 4.45 | 18,322 |
| The American Civil War | 0 | - | 4.62 | 52,209 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 502,823 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 47,774 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 207,089 |
| Great Plains States and Provinces on a Map | 0 | - | 4.95 | 48,738 |
| Draw All US State Borders | 0 | - | 4.99 | 134,277 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 124,038 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 124,852 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 91,260 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,203 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,035 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,615 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 94,972 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 132,172 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 164,658 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 102,908 |
| All Modern-Day Countries Ever Controlled by French People | 0 | - | 4.99 | 57,645 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 97,952 |
| Ultimate Harry Potter Name Game | 0 | - | 4.94 | 491,768 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 236,588 |
| Most-Visited Countries by Popes | 0 | - | 4.55 | 83,282 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 69,339 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 81,991 |
| Countries Bordering China Since 1914 | 0 | - | 4.93 | 94,828 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 88,597 |
| Colonies of Africa with a Map | 0 | - | 4.77 | 54,049 |
| Random American Countries on a Map | 0 | - | 4.96 | 98,789 |
| Most-Spoken Languages of the United States | 0 | - | 4.52 | 217,310 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 117,592 |
| Most Common High School Mascots | 0 | - | 4.47 | 31,884 |
| History of Florida | 0 | - | 4.45 | 9,776 |
| The Life of Martin Luther King Jr. | 0 | - | 4.73 | 11,069 |
| Hawaiian Islands | 0 | - | 4.83 | 42,491 |
| Top 10 Boston Celtics Players | 0 | - | 4.05 | 23,643 |
| Boston Celtics Trivia | 0 | - | 4.09 | 14,761 |
| Top 15 New York Yankees of All-Time | 0 | - | 4.02 | 25,677 |
| History of Texas | 0 | - | 4.43 | 14,565 |
| History of Pennsylvania | 0 | - | 4.16 | 7,096 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,141 |
| History of Virginia | 0 | - | 4.31 | 11,563 |
| American History Quotes #1 | 0 | - | 4.37 | 95,732 |
| American History Quotes #2 | 0 | - | 4.38 | 41,248 |
| Old West History | 0 | - | 4.33 | 15,234 |
| Events in U.S. History | 0 | - | 4.40 | 28,515 |
| Life of Benjamin Franklin | 0 | - | 4.24 | 6,498 |
| American Revolution - Multiple Choice | 0 | - | 4.34 | 19,865 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,106 |
| Fifty US States in One Minute | 0 | - | 4.56 | 3,522,312 |
| U.S. State Flags | 0 | - | 4.89 | 167,904 |
| U.S. States that Border Canada | 0 | - | 4.91 | 182,972 |
| Category Elimination - U.S. States #1 | 0 | - | 4.88 | 218,905 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 132,806 |
| U.S. States that Start with M - Shape Quiz | 0 | - | 4.94 | 57,750 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 160,644 |
| Countries of Europe After World War II | 0 | - | 4.99 | 186,959 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 155,572 |
