| U.S. Presidents Quiz | 0 | - | 5.00 | 3,700,851 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 191,923 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 108,772 |
| U.S. Presidents by Event | 0 | - | 4.58 | 34,539 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.62 | 93,846 |
| Presidential Middle Names | 0 | - | 4.41 | 60,305 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,378 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,618 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,444 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 35,014 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 70,054 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 381,942 |
| U.S. Presidents Who Added the Most Territory | 0 | - | 4.66 | 14,114 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,302 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,264 |
| First Ladies of the United States | 0 | - | 4.28 | 85,670 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,231 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 77,128 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,211 |
| Add a Letter - Make a U.S. President | 0 | - | 4.57 | 23,974 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,836 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,960 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 426,639 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,909 |
| U.S. Presidents by Picture - Multiple Choice | 0 | - | 4.50 | 28,851 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 28,644 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,736 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,653 |
| The John Adams Presidency | 0 | - | 4.12 | 8,750 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,744 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,857 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,334 |
| The George Washington Presidency | 0 | - | 4.03 | 14,549 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,935 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,327 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,688 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 305,045 |
| Vietnam War Countries | 0 | - | 4.82 | 94,257 |
| George Washington... or George W. Bush? | 0 | - | 4.16 | 12,267 |
| U.S. President Scramble | 0 | - | 4.40 | 116,812 |
| U.S. Presidents True or False | 0 | - | 3.96 | 15,607 |
| The Kennedy Family | 0 | - | 3.90 | 14,074 |
| U.S. Senators by State | 0 | - | 4.44 | 39,967 |
| Presidents that Beat Thomas Jefferson | 0 | - | 4.49 | 24,951 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,509 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,199 |
| The John F. Kennedy Presidency | 0 | - | 4.47 | 43,755 |
| The American Revolution | 0 | - | 4.52 | 54,262 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,856 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 129,290 |
| Mississippi River States Empty Map Quiz | 0 | - | 4.82 | 55,980 |
| Win the U.S. Presidential Election | 0 | - | 4.78 | 628,116 |
| The Jimmy Carter Presidency | 0 | - | 4.41 | 19,144 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 20,064 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,695 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,197 |
| United States Map Quiz | 0 | - | 4.98 | 4,159,572 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,592 |
| Random U.S. Presidents by Picture | 0 | - | 4.40 | 66,267 |
| The Barack Obama Presidency | 0 | - | 4.13 | 25,410 |
| Harvard University | 0 | - | 4.15 | 8,298 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 88,991 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,637 |
| The Iraq War | 0 | - | 4.47 | 15,657 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,751 |
| Rust Belt Cities Map Quiz | 0 | - | 4.57 | 35,112 |
| Top 10 U.S. States by Republican Party Support | 0 | - | 4.44 | 75,531 |
| Top 10 U.S. States by Democratic Party Support | 0 | - | 4.63 | 81,362 |
| Top 10 U.S. Swing States in the 2024 Election | 0 | - | 4.51 | 75,212 |
| Presidential Actors | 0 | - | 4.36 | 19,179 |
| The Bill Clinton Presidency | 0 | - | 4.24 | 31,466 |
| The George H. W. Bush Presidency | 0 | - | 4.36 | 21,499 |
| The Ronald Reagan Presidency | 0 | - | 4.26 | 24,832 |
| The Richard Nixon Presidency | 0 | - | 4.05 | 22,024 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 69,321 |
| U.S. States Closest to Moscow | 0 | - | 4.50 | 48,066 |
| Countries of the Soviet Union | 0 | - | 4.98 | 194,643 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,770 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,912 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,510 |
| Name the U.S. National Parks | 0 | - | 4.86 | 59,977 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,528 |
| Total United States Immigration by Country | 0 | - | 4.91 | 111,703 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,502 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 174,575 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 244,232 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,896 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 74,143 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,260 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 39,961 |
| US States Quiz | 0 | - | 5.00 | 16,885,297 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 367,179 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,467 |
| Countries of Europe in 1848 | 0 | - | 4.99 | 82,305 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,769 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,088 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,958 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 144,715 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 116,064 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,704 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 81,309 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,186 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 332,311 |
| Pixelated United States Map | 0 | - | 4.87 | 94,318 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 109,742 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 91,816 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 146,490 |
| Countries that Beat the United States | 0 | - | 4.93 | 167,536 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,079 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,814 |
| George Bush... or George Bush | 0 | - | 3.98 | 8,205 |
| American Revolution Decoder | 0 | - | 4.10 | 20,959 |
| California A-Z | 0 | - | 4.49 | 28,793 |
| Las Vegas Casinos | 0 | - | 4.13 | 38,069 |
| Six Flags Over Texas | 0 | - | 4.78 | 63,382 |
| U.S. History for Dummies | 0 | - | 4.47 | 83,085 |
| The Most Recent... United States | 0 | - | 4.45 | 18,460 |
| The American Civil War | 0 | - | 4.62 | 52,436 |
| U.S. Civil War Decoder | 0 | - | 4.14 | 25,276 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 117,952 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 506,837 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 111,494 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 113,493 |
| U.S. States with Short Names | 0 | - | 4.91 | 149,081 |
| U.S. States that Start with M | 0 | - | 4.93 | 187,372 |
| U.S. States By Population | 0 | - | 4.92 | 153,600 |
| U.S. States that Start with N | 0 | - | 4.95 | 171,510 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,470 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 48,654 |
| US States with an Empty Map | 0 | - | 5.00 | 624,938 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 82,571 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,370 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,236 |
| Most Common Immigrant Origin by U.S. State | 0 | - | 4.90 | 66,796 |
| Draw All US State Borders | 0 | - | 4.99 | 137,786 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 65,665 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 160,079 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 177,806 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 125,266 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,575 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 86,292 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,803 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,508 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.85 | 67,593 |
| Merged U.S. States | 0 | - | 4.37 | 44,176 |
| Draw All US State Borders - Extreme | 0 | - | 4.99 | 78,586 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 96,133 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 133,283 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 165,441 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 103,842 |
| All Modern-Day Countries Ever Controlled by Greeks | 0 | - | 4.98 | 54,184 |
| Least Irish U.S. States | 0 | - | 4.49 | 18,318 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 61,160 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,905 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,321 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,590 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 237,480 |
| Vatican City Country Quiz | 0 | - | 4.53 | 44,395 |
| Most-Visited Countries by Popes | 0 | - | 4.56 | 83,764 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 69,956 |
| The Persian Gulf War | 0 | - | 4.02 | 8,451 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,687 |
| Countries Bordering China Since 1914 | 0 | - | 4.93 | 95,271 |
| All Modern-Day Countries Ever Controlled by Chinese People | 0 | - | 4.82 | 54,846 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 89,333 |
| South America Flags Map Quiz | 0 | - | 4.95 | 88,017 |
| Rivers of the United States | 0 | - | 4.93 | 66,227 |
| Names of Generations | 0 | - | 4.09 | 44,983 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 118,210 |
| American Founding Fathers | 0 | - | 4.42 | 23,229 |
| Countries Closest to Alaska | 0 | - | 4.93 | 124,399 |
| Top 10 Los Angeles Lakers of All-Time | 0 | - | 4.24 | 46,934 |
| History of Florida | 0 | - | 4.45 | 9,828 |
| Hawaiian Islands | 0 | - | 4.83 | 42,728 |
| Countries Closest to Maine | 0 | - | 4.85 | 67,138 |
| New York Yankees Trivia | 0 | - | 4.29 | 7,215 |
| History of Texas | 0 | - | 4.43 | 14,634 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,333 |
| American History Quotes #1 | 0 | - | 4.37 | 96,046 |
| People on Money - United States | 0 | - | 4.31 | 63,349 |
| American History Quotes #2 | 0 | - | 4.38 | 41,414 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,473 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,075 |
| Events in U.S. History | 0 | - | 4.41 | 28,682 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,118 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,737 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,249 |
| U.S. State Flags | 0 | - | 4.88 | 170,648 |
| U.S. States that Border Canada | 0 | - | 4.91 | 185,068 |
| U.S. States by Church Attendance | 0 | - | 4.59 | 32,441 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 209,063 |
| Great Plains States and Provinces on a Map | 0 | - | 4.95 | 49,518 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 124,695 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 125,706 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 92,136 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,927 |
| U.S. States that Start with M - Shape Quiz | 0 | - | 4.94 | 58,152 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 161,556 |
| All Modern-Day Countries Ever Controlled by French People | 0 | - | 4.99 | 58,115 |
| Biggest Roman Empire Countries | 0 | - | 4.87 | 101,915 |
