| U.S. Presidents Quiz | 0 | - | 5.00 | 3,731,686 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 194,052 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 192,029 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 70,660 |
| Egypt Country Quiz | 0 | - | 4.82 | 78,023 |
| The Iraq War | 0 | - | 4.47 | 15,719 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 109,679 |
| U.S. Presidents by Event | 0 | - | 4.58 | 35,484 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.62 | 94,767 |
| Presidential Middle Names | 0 | - | 4.42 | 60,812 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,754 |
| Assassinated U.S. Presidents | 0 | - | 4.62 | 94,944 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,661 |
| Mississippi River States Empty Map Quiz | 0 | - | 4.82 | 56,387 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,718 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 35,260 |
| The American Revolution | 0 | - | 4.52 | 54,394 |
| Byzantine History | 0 | - | 4.91 | 29,055 |
| Byzantine Emperors | 0 | - | 4.93 | 14,665 |
| Countries Bordering Iran | 0 | - | 4.83 | 96,166 |
| Countries that Border Iraq | 0 | - | 4.97 | 109,214 |
| The Persian Gulf War | 0 | - | 4.02 | 8,491 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 73,119 |
| Vietnam War Countries | 0 | - | 4.82 | 94,765 |
| Countries Bordering China Since 1914 | 0 | - | 4.92 | 95,950 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 90,120 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 81,842 |
| United States Map Quiz | 0 | - | 4.98 | 4,173,781 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 428,921 |
| U.S. Vice Presidents | 0 | - | 4.39 | 137,201 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,383 |
| U.S. Presidential Running Mates | 0 | - | 4.41 | 28,799 |
| First Ladies of the United States | 0 | - | 4.28 | 86,031 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,339 |
| U.S. Presidents in Order by First Letter | 0 | - | 4.32 | 77,543 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,387 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 70,671 |
| Six Flags Over Texas | 0 | - | 4.78 | 63,673 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,962 |
| Biggest Roman Empire Countries | 0 | - | 4.88 | 102,452 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,453,532 |
| Asia Map Quiz | 0 | - | 4.99 | 926,901 |
| Biggest Trading Partners - Turkey | 0 | - | 4.81 | 51,286 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 83,560 |
| Countries Closest to Egypt | 0 | - | 4.83 | 101,677 |
| The Vietnam War | 0 | - | 4.44 | 35,694 |
| Rust Belt Cities Map Quiz | 0 | - | 4.57 | 35,319 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 383,930 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 48,117 |
| The American Civil War | 0 | - | 4.62 | 52,666 |
| U.S. Civil War Decoder | 0 | - | 4.14 | 25,346 |
| Modern-Day Countries of the Roman Empire on a Map | 0 | - | 4.99 | 127,077 |
| Flags of Asia Quiz | 0 | - | 4.99 | 622,066 |
| Countries of Asia in 1900 | 0 | - | 4.50 | 58,342 |
| South and Central Asia Map Quiz | 0 | - | 4.94 | 100,199 |
| Middle East Map Quiz | 0 | - | 4.99 | 1,388,111 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 104,700 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,968 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,994 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 114,039 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 76,080 |
| U.S. Senators by State | 0 | - | 4.44 | 40,148 |
| American Founding Fathers | 0 | - | 4.42 | 23,296 |
| History of Florida | 0 | - | 4.45 | 9,886 |
| Cities and Towns of Massachusetts | 0 | - | 4.93 | 75,256 |
| History of Texas | 0 | - | 4.43 | 14,703 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 40,343 |
| American History Quotes #1 | 0 | - | 4.37 | 96,255 |
| American History Quotes #2 | 0 | - | 4.38 | 41,539 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 52,206 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,368 |
| US States Quiz | 0 | - | 5.00 | 17,025,575 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 70,772 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,581 |
| East Asia Cities Map Quiz | 0 | - | 4.96 | 110,955 |
| 10 Biggest Asian Countries by Area | 0 | - | 4.97 | 154,748 |
| 10 Southernmost Countries in Asia | 0 | - | 4.97 | 100,094 |
| 10 Easternmost Countries in Asia | 0 | - | 4.99 | 109,341 |
| 10 Asian Countries with the Most Tourists | 0 | - | 4.90 | 107,091 |
| Countries of Asia with Two or More Words | 0 | - | 4.96 | 128,046 |
| Asian Countries Ending in "IA" | 0 | - | 4.96 | 108,507 |
| Asian Countries with the Shortest Names | 0 | - | 4.97 | 136,319 |
| "Stan" Countries - Map Quiz | 0 | - | 4.98 | 137,870 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.75 | 60,262 |
| Pixelated Asia Map | 0 | - | 4.90 | 73,900 |
| Monarchies of Asia | 0 | - | 4.97 | 71,620 |
| Asian Country Superlatives | 0 | - | 4.84 | 81,367 |
| Countries of the Middle East | 0 | - | 4.96 | 203,307 |
| Flags of the Middle East | 0 | - | 4.69 | 62,866 |
| Iran Country Quiz | 0 | - | 4.49 | 60,778 |
| Iraq Country Quiz | 0 | - | 4.43 | 41,192 |
| Name the U.S. National Parks | 0 | - | 4.86 | 60,605 |
| Total United States Immigration by Country | 0 | - | 4.91 | 112,579 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 175,768 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 247,092 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 336,323 |
| Pixelated United States Map | 0 | - | 4.89 | 94,950 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 110,769 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 92,613 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,165 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 73,173 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,878 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.38 | 24,091 |
| The George Washington Presidency | 0 | - | 4.03 | 14,622 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,789 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,778 |
| The John Adams Presidency | 0 | - | 4.12 | 8,799 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 17,003 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,788 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,398 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,777 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,941 |
| Harvard University | 0 | - | 4.15 | 8,335 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,836 |
| Las Vegas Casinos | 0 | - | 4.13 | 38,166 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 119,206 |
| U.S. States with the Letter Y | 0 | - | 4.86 | 112,452 |
| 10 Southernmost U.S. States | 0 | - | 4.89 | 114,471 |
| U.S. States with Short Names | 0 | - | 4.91 | 150,537 |
| U.S. States that Start with M | 0 | - | 4.93 | 188,588 |
| U.S. States By Population | 0 | - | 4.92 | 154,270 |
| U.S. States that Start with N | 0 | - | 4.95 | 172,392 |
| U.S. States with Longest Names | 0 | - | 4.85 | 44,991 |
| US States with an Empty Map | 0 | - | 5.00 | 629,680 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 83,181 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 368,914 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,994 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,605 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 66,223 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 161,186 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 178,326 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 125,781 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,883 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 86,729 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.85 | 68,071 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 117,135 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 119,062 |
| Top 10 Coldest Asian Countries | 0 | - | 4.95 | 123,820 |
| Asian Countries with the Most Christians | 0 | - | 4.86 | 98,173 |
| Top 10 Asian Countries by Coastline | 0 | - | 4.92 | 96,758 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.87 | 137,781 |
| Name a Valid Asian Country | 0 | - | 4.98 | 121,972 |
| Countries Closest to the Persian Gulf | 0 | - | 4.93 | 83,793 |
| Qatar Country Quiz | 0 | - | 4.86 | 31,762 |
| Countries Closest to Turkey | 0 | - | 4.96 | 127,039 |
| Countries Bordering Turkey | 0 | - | 4.98 | 117,981 |
| Countries Bordering Saudi Arabia | 0 | - | 4.96 | 133,929 |
| Countries Closest to Cyprus | 0 | - | 4.91 | 56,281 |
| Jordan Country Quiz | 0 | - | 4.86 | 32,150 |
| Countries with the Most Arabic Speakers | 0 | - | 4.92 | 80,952 |
| Countries in Southeast Asia With an Empty Map | 0 | - | 4.97 | 102,164 |
| Countries Closest to Indonesia | 0 | - | 4.97 | 105,180 |
| Countries Closest to Vietnam | 0 | - | 4.96 | 94,477 |
| Countries Bordering Myanmar | 0 | - | 4.87 | 78,277 |
| China Cities Map Quiz | 0 | - | 4.94 | 106,052 |
| Provinces of China Map Quiz | 0 | - | 4.92 | 94,874 |
| Countries that Border China | 0 | - | 4.96 | 264,568 |
| Japan Country Quiz | 0 | - | 4.93 | 143,546 |
| Countries that Visit Japan the Most | 0 | - | 4.93 | 77,958 |
| Most-Visited Countries by Japanese | 0 | - | 4.95 | 60,645 |
| Countries Closest to Japan | 0 | - | 4.92 | 139,763 |
| Countries Kim Jong Un Has Been To | 0 | - | 4.95 | 33,452 |
| Countries Closest to Taiwan | 0 | - | 4.81 | 93,847 |
| Countries Bordering India | 0 | - | 4.98 | 163,907 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.69 | 55,707 |
| Countries Closest to India | 0 | - | 4.97 | 103,346 |
| Modern Day Countries of the Mughal Empire on a Map | 0 | - | 4.43 | 33,902 |
| Countries with the Most Ascents of Mount Everest | 0 | - | 4.95 | 58,659 |
| Nepal Country Quiz | 0 | - | 4.95 | 38,028 |
| Every African Country Shape | 0 | - | 4.90 | 88,647 |
| African Countries with the Most Christians | 0 | - | 4.94 | 76,231 |
| Top 10 Richest Countries in Africa | 0 | - | 4.85 | 77,156 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 121,505 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,465 |
| Rivers of the United States | 0 | - | 4.93 | 66,796 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 147,419 |
| Countries that Beat the United States | 0 | - | 4.93 | 168,933 |
| Countries Closest to Alaska | 0 | - | 4.93 | 125,316 |
| California A-Z | 0 | - | 4.49 | 28,859 |
| History of California | 0 | - | 4.40 | 18,806 |
| Top 10 Los Angeles Lakers of All-Time | 0 | - | 4.24 | 47,258 |
| History of Georgia (U.S. State) | 0 | - | 4.30 | 13,273 |
| History of Illinois | 0 | - | 4.24 | 11,264 |
| Countries Closest to Maine | 0 | - | 4.85 | 67,710 |
| History of Maryland | 0 | - | 4.06 | 6,743 |
| History of Massachusetts | 0 | - | 4.14 | 8,443 |
| History of Michigan | 0 | - | 4.26 | 6,995 |
| History of New York | 0 | - | 4.36 | 16,433 |
| History of New Jersey | 0 | - | 4.38 | 7,319 |
| History of Ohio | 0 | - | 4.14 | 7,392 |
| History of Tennessee | 0 | - | 4.29 | 7,695 |
| History of Washington State | 0 | - | 4.27 | 6,923 |
| People on Money - United States | 0 | - | 4.31 | 63,488 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,633 |
| Events in U.S. History | 0 | - | 4.41 | 28,863 |
| U.S. History A-Z #1 | 0 | - | 4.36 | 30,584 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,222 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,808 |
| Last Names in U.S. History #2 | 0 | - | 4.39 | 17,723 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 511,048 |
