| U.S. Presidents Quiz | 0 | - | 5.00 | 3,652,760 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 189,776 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,218 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 69,186 |
| Egypt Country Quiz | 0 | - | 4.82 | 77,018 |
| The Iraq War | 0 | - | 4.47 | 15,548 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 105,835 |
| U.S. Vice Presidents | 0 | - | 4.41 | 134,884 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 107,921 |
| U.S. Presidents by Event | 0 | - | 4.58 | 33,448 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 92,984 |
| Presidential Middle Names | 0 | - | 4.41 | 59,688 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 52,714 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 93,798 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,161 |
| Mississippi River States Empty Map Quiz | 0 | - | 4.81 | 55,594 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 80,647 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,730 |
| The American Revolution | 0 | - | 4.52 | 54,049 |
| Byzantine History | 0 | - | 4.91 | 28,610 |
| Countries Bordering Iran | 0 | - | 4.83 | 94,764 |
| Countries that Border Iraq | 0 | - | 4.97 | 107,832 |
| The Persian Gulf War | 0 | - | 4.02 | 8,399 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,253 |
| Vietnam War Countries | 0 | - | 4.83 | 93,584 |
| Countries Bordering China Since 1914 | 0 | - | 4.93 | 94,702 |
| United States Map Quiz | 0 | - | 4.98 | 4,141,228 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 423,586 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,162 |
| First Ladies of the United States | 0 | - | 4.28 | 85,230 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,109 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 76,261 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 15,998 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 69,382 |
| Six Flags Over Texas | 0 | - | 4.79 | 63,000 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,681 |
| Biggest Roman Empire Countries | 0 | - | 4.87 | 101,347 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,439,459 |
| Asia Map Quiz | 0 | - | 4.99 | 906,732 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 81,760 |
| Countries Closest to Egypt | 0 | - | 4.83 | 100,530 |
| The Vietnam War | 0 | - | 4.43 | 35,287 |
| Rust Belt Cities Map Quiz | 0 | - | 4.57 | 34,880 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,812 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 379,498 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,689 |
| The American Civil War | 0 | - | 4.62 | 52,148 |
| U.S. Civil War Decoder | 0 | - | 4.14 | 25,183 |
| Modern-Day Countries of the Roman Empire on a Map | 0 | - | 4.99 | 124,682 |
| Flags of Asia Quiz | 0 | - | 4.99 | 605,261 |
| Countries of Asia in 1900 | 0 | - | 4.50 | 57,609 |
| South and Central Asia Map Quiz | 0 | - | 4.93 | 97,425 |
| Middle East Map Quiz | 0 | - | 4.99 | 1,375,632 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 103,847 |
| U.S. State Border Crossings | 0 | - | 4.97 | 95,934 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,286 |
| Third Most Common Language by U.S. State | 0 | - | 4.89 | 113,370 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 74,846 |
| U.S. Senators by State | 0 | - | 4.45 | 39,743 |
| American Founding Fathers | 0 | - | 4.41 | 23,071 |
| History of Florida | 0 | - | 4.45 | 9,761 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 73,040 |
| History of Texas | 0 | - | 4.43 | 14,551 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 39,470 |
| American History Quotes #1 | 0 | - | 4.37 | 95,681 |
| American History Quotes #2 | 0 | - | 4.38 | 41,222 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 44,725 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,074 |
| US States Quiz | 0 | - | 5.00 | 16,694,429 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 67,305 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 148,896 |
| East Asia Cities Map Quiz | 0 | - | 4.96 | 109,327 |
| 10 Biggest Asian Countries by Area | 0 | - | 4.97 | 152,734 |
| 10 Southernmost Countries in Asia | 0 | - | 4.97 | 98,377 |
| 10 Easternmost Countries in Asia | 0 | - | 4.99 | 107,207 |
| 10 Asian Countries with the Most Tourists | 0 | - | 4.89 | 104,998 |
| Countries of Asia with Two or More Words | 0 | - | 4.96 | 125,672 |
| Asian Countries Ending in "IA" | 0 | - | 4.96 | 106,452 |
| Asian Countries with the Shortest Names | 0 | - | 4.97 | 134,322 |
| "Stan" Countries - Map Quiz | 0 | - | 4.98 | 133,705 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.75 | 59,643 |
| Pixelated Asia Map | 0 | - | 4.90 | 72,372 |
| Monarchies of Asia | 0 | - | 4.97 | 70,587 |
| Asian Country Superlatives | 0 | - | 4.84 | 80,421 |
| Countries of the Middle East | 0 | - | 4.96 | 198,845 |
| Flags of the Middle East | 0 | - | 4.69 | 62,315 |
| Iran Country Quiz | 0 | - | 4.53 | 59,895 |
| Iraq Country Quiz | 0 | - | 4.43 | 40,683 |
| Countries Kim Jong Un Has Been To | 0 | - | 4.95 | 32,192 |
| Countries Closest to Taiwan | 0 | - | 4.81 | 92,766 |
| Countries Bordering India | 0 | - | 4.98 | 162,579 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.68 | 55,159 |
| Countries Closest to India | 0 | - | 4.97 | 102,195 |
| Countries with the Most Ascents of Mount Everest | 0 | - | 4.95 | 57,761 |
| Nepal Country Quiz | 0 | - | 4.95 | 37,318 |
| Every African Country Shape | 0 | - | 4.90 | 86,051 |
| African Countries with the Most Christians | 0 | - | 4.94 | 74,844 |
| Top 10 Richest Countries in Africa | 0 | - | 4.85 | 75,155 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 119,343 |
| Name the U.S. National Parks | 0 | - | 4.86 | 58,805 |
| Total United States Immigration by Country | 0 | - | 4.91 | 110,622 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 173,116 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 240,800 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 327,849 |
| Pixelated United States Map | 0 | - | 4.89 | 93,444 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 108,428 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 90,820 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 28,878 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,507 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.49 | 11,669 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 28,457 |
| The George Washington Presidency | 0 | - | 4.03 | 14,473 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,658 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,491 |
| The John Adams Presidency | 0 | - | 4.12 | 8,675 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,867 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,681 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,206 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,608 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,770 |
| Harvard University | 0 | - | 4.15 | 8,260 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.84 | 65,605 |
| Las Vegas Casinos | 0 | - | 4.12 | 37,969 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 116,692 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 110,326 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 112,374 |
| U.S. States with Short Names | 0 | - | 4.91 | 147,618 |
| U.S. States that Start with M | 0 | - | 4.93 | 185,870 |
| U.S. States By Population | 0 | - | 4.92 | 152,329 |
| U.S. States that Start with N | 0 | - | 4.95 | 170,364 |
| U.S. States with Longest Names | 0 | - | 4.84 | 43,838 |
| US States with an Empty Map | 0 | - | 5.00 | 618,608 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 81,880 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 365,213 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 87,527 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 63,747 |
| The Only Remaining U.S. State . . . | 0 | - | 4.92 | 64,861 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 158,849 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 177,065 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 124,459 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,057 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 85,648 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.84 | 66,812 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 114,745 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,214 |
| Top 10 Coldest Asian Countries | 0 | - | 4.95 | 122,482 |
| Asian Countries with the Most Christians | 0 | - | 4.85 | 96,205 |
| Top 10 Asian Countries by Coastline | 0 | - | 4.92 | 96,138 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.85 | 113,210 |
| Name a Valid Asian Country | 0 | - | 4.98 | 120,020 |
| Countries Closest to the Persian Gulf | 0 | - | 4.93 | 82,969 |
| Countries Closest to Turkey | 0 | - | 4.96 | 125,319 |
| Countries Bordering Turkey | 0 | - | 4.98 | 116,455 |
| Countries Bordering Saudi Arabia | 0 | - | 4.95 | 118,209 |
| Syria Country Quiz | 0 | - | 4.81 | 32,293 |
| Countries Closest to Cyprus | 0 | - | 4.91 | 54,866 |
| Countries with the Most Arabic Speakers | 0 | - | 4.92 | 79,427 |
| Countries in Southeast Asia With an Empty Map | 0 | - | 4.97 | 100,775 |
| Countries Closest to Indonesia | 0 | - | 4.96 | 103,928 |
| Countries Closest to Vietnam | 0 | - | 4.95 | 93,486 |
| Countries Bordering Myanmar | 0 | - | 4.87 | 77,059 |
| China Cities Map Quiz | 0 | - | 4.93 | 104,002 |
| Provinces of China Map Quiz | 0 | - | 4.92 | 92,753 |
| Countries that Border China | 0 | - | 4.96 | 261,787 |
| Japan Country Quiz | 0 | - | 4.92 | 141,198 |
| Countries that Visit Japan the Most | 0 | - | 4.93 | 76,925 |
| Most-Visited Countries by Japanese | 0 | - | 4.95 | 59,691 |
| Countries Closest to Japan | 0 | - | 4.92 | 137,892 |
| Closest Countries to North Korea | 0 | - | 4.94 | 121,776 |
| Kazakhstan Country Quiz | 0 | - | 4.85 | 30,771 |
| Bhutan Country Quiz | 0 | - | 4.87 | 24,005 |
| States of India Map Quiz | 0 | - | 4.82 | 26,017 |
| Countries with the Most Hindus | 0 | - | 4.90 | 122,308 |
| Hindu Countries | 0 | - | 4.85 | 49,544 |
| Africa Flags Map Quiz | 0 | - | 4.94 | 35,904 |
| Random African Flag to Country | 0 | - | 4.87 | 74,185 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 38,792 |
| Rivers of the United States | 0 | - | 4.93 | 65,489 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 145,376 |
| Countries that Beat the United States | 0 | - | 4.93 | 165,518 |
| Countries Closest to Alaska | 0 | - | 4.93 | 123,285 |
| California A-Z | 0 | - | 4.49 | 28,703 |
| History of California | 0 | - | 4.40 | 18,694 |
| Top 10 Los Angeles Lakers of All-Time | 0 | - | 4.24 | 46,487 |
| History of Georgia (U.S. State) | 0 | - | 4.30 | 13,178 |
| History of Illinois | 0 | - | 4.24 | 11,175 |
| Countries Closest to Maine | 0 | - | 4.84 | 66,422 |
| History of Maryland | 0 | - | 4.06 | 6,648 |
| History of Massachusetts | 0 | - | 4.14 | 8,327 |
| History of Michigan | 0 | - | 4.26 | 6,902 |
| History of New York | 0 | - | 4.36 | 16,279 |
| History of New Jersey | 0 | - | 4.38 | 7,204 |
| History of Ohio | 0 | - | 4.14 | 7,307 |
| History of Tennessee | 0 | - | 4.29 | 7,632 |
| History of Washington State | 0 | - | 4.27 | 6,837 |
| People on Money - United States | 0 | - | 4.31 | 63,202 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,235 |
| U.S. History A-Z #1 | 0 | - | 4.39 | 29,312 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 32,987 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,643 |
