| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 123,080 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,209,430 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 99,090 |
| U.S. Presidents by Picture | 0 | - | 4.85 | 397,379 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 355,820 |
| American Revolution Decoder | 0 | - | 4.12 | 20,075 |
| Vietnam War Countries | 0 | - | 4.81 | 86,915 |
| The American Revolution | 0 | - | 4.55 | 51,944 |
| Neutral European Countries of WWII | 0 | - | 4.92 | 149,380 |
| Asian Countries with the Shortest Names | 0 | - | 4.98 | 122,819 |
| Category Elimination - U.S. States #1 | 0 | - | 4.90 | 196,889 |
| Random U.S. States on a Map | 0 | - | 4.95 | 505,345 |
| Countries of Europe After World War II | 0 | - | 4.98 | 172,600 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 141,082 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.92 | 100,415 |
| Asian Countries with the Most Christians | 0 | - | 4.86 | 85,707 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.84 | 55,529 |
| Name a Valid Asian Country | 0 | - | 4.98 | 93,330 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 67,608 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 94,796 |
| Biggest Mongol Empire Countries | 0 | - | 4.91 | 67,960 |
| U.S. Vice Presidents | 0 | - | 4.43 | 121,245 |
| U.S. Presidential Trivia #1 | 0 | - | 4.51 | 97,959 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.57 | 82,672 |
| U.S. Presidential Trivia #2 | 0 | - | 4.52 | 40,300 |
| Assassinated U.S. Presidents | 0 | - | 4.54 | 80,723 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 33,710 |
| Most-Visited Countries by U.S. Presidents | 0 | - | 4.97 | 179,747 |
| Deadliest U.S. Wars | 0 | - | 4.83 | 159,469 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 61,492 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 72,686 |
| Biggest Trading Partners - China | 0 | - | 4.96 | 70,740 |
| Countries that Beat China | 0 | - | 4.83 | 101,305 |
| Countries Bordering China Since 1914 | 0 | - | 4.92 | 88,418 |
| Countries that Beat the United States | 0 | - | 4.92 | 147,402 |
| US Presidents - 1 Minute Sprint | 0 | - | 4.43 | 281,647 |
| The John F. Kennedy Presidency | 0 | - | 4.45 | 41,199 |
| Six Flags Over Texas | 0 | - | 4.84 | 59,207 |
| Word Scramble - U.S. States | 0 | - | 4.96 | 462,718 |
| Name a Valid U.S. State #1 | 0 | - | 4.95 | 186,823 |
| Random Sequential U.S. States on a Map | 0 | - | 4.99 | 220,229 |
| U.S. Map with Random Merged States | 0 | - | 4.94 | 277,096 |
| Countries of the German Empire | 0 | - | 4.51 | 34,109 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 403,223 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,353,100 |
| Asia Map Quiz | 0 | - | 4.99 | 796,359 |
| United States Map Quiz | 0 | - | 4.98 | 3,925,535 |
| Arms Exports - United States | 0 | - | 4.65 | 48,894 |
| Governors Who Ran For President | 0 | - | 4.47 | 18,969 |
| U.S. Presidents by Event | 0 | - | 4.58 | 29,322 |
| U.S. Presidential Running Mates | 0 | - | 4.41 | 26,023 |
| First Ladies of the United States | 0 | - | 4.27 | 80,483 |
| Presidential Middle Names | 0 | - | 4.37 | 56,408 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 24,940 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 65,759 |
| U.S. Presidents Who Died in Office | 0 | - | 4.75 | 31,429 |
| Random U.S. Vice President to President | 0 | - | 4.55 | 28,094 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.63 | 14,077 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 77,945 |
| Flags of Asia Quiz | 0 | - | 4.99 | 531,843 |
| East Asia Cities Map Quiz | 0 | - | 4.97 | 101,218 |
| 10 Biggest Asian Countries by Area | 0 | - | 4.97 | 142,221 |
| 10 Southernmost Countries in Asia | 0 | - | 4.97 | 89,870 |
| 10 Easternmost Countries in Asia | 0 | - | 4.98 | 97,806 |
| Countries of Asia in 1900 | 0 | - | 4.49 | 53,878 |
| Countries of Asia with Two or More Words | 0 | - | 4.95 | 112,305 |
| Asian Countries Ending in "IA" | 0 | - | 4.94 | 94,822 |
| South and Central Asia Map Quiz | 0 | - | 4.93 | 81,299 |
| Middle East Map Quiz | 0 | - | 4.99 | 1,290,434 |
| Countries of the Middle East | 0 | - | 4.96 | 176,085 |
| The Vietnam War | 0 | - | 4.41 | 33,077 |
| Third Most Common Language by U.S. State | 0 | - | 4.90 | 107,930 |
| U.S. Presidential Quotes | 0 | - | 4.36 | 42,852 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.73 | 19,316 |
| People in Pictures with Ronald Reagan | 0 | - | 4.36 | 37,830 |
| U.S. President Scramble | 0 | - | 4.39 | 91,947 |
| Name a Valid U.S. President #1 | 0 | - | 4.93 | 169,278 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.47 | 21,084 |
| American History Quotes #1 | 0 | - | 4.40 | 91,853 |
| American History Quotes #2 | 0 | - | 4.38 | 39,400 |
| Last Names in U.S. History #1 | 0 | - | 4.24 | 34,396 |
| Last Names in U.S. History #2 | 0 | - | 4.42 | 16,129 |
| US States Quiz | 0 | - | 5.00 | 14,926,663 |
| Fifty US States in One Minute | 0 | - | 4.57 | 3,275,784 |
| Category Elimination - U.S. States #2 | 0 | - | 4.79 | 116,883 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.93 | 1,201,979 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.92 | 51,156 |
| Countries of the Soviet Union | 0 | - | 4.98 | 185,810 |
| Soviet Union Country Quiz | 0 | - | 4.91 | 75,077 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 94,866 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 101,713 |
| Asian Diaspora - Top 10 Countries | 0 | - | 4.81 | 38,210 |
| 10 Asian Countries with the Most Tourists | 0 | - | 4.89 | 92,874 |
| Asian Last Names in the United States | 0 | - | 4.41 | 43,629 |
| Top 10 Coldest Asian Countries | 0 | - | 4.95 | 117,065 |
| "Stan" Countries - Map Quiz | 0 | - | 4.98 | 113,681 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.88 | 103,190 |
| Pixelated Asia Map | 0 | - | 4.90 | 64,100 |
| Monarchies of Asia | 0 | - | 4.95 | 54,589 |
| Asian Countries with the Fewest Borders | 0 | - | 4.82 | 89,178 |
| Countries Closest to the Persian Gulf | 0 | - | 4.92 | 77,496 |
| The Iraq War | 0 | - | 4.45 | 14,472 |
| Countries with the Most Arabic Speakers | 0 | - | 4.91 | 71,340 |
| Countries in Southeast Asia With an Empty Map | 0 | - | 4.97 | 93,043 |
| Indonesia Country Quiz | 0 | - | 4.83 | 67,424 |
| China Cities Map Quiz | 0 | - | 4.88 | 89,757 |
| Provinces of China Map Quiz | 0 | - | 4.93 | 84,208 |
| Japan Country Quiz | 0 | - | 4.92 | 120,860 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.58 | 52,141 |
| Countries with the Most Ascents of Mount Everest | 0 | - | 4.96 | 53,012 |
| Nepal Country Quiz | 0 | - | 4.95 | 33,746 |
| African Countries with the Most Christians | 0 | - | 4.92 | 68,168 |
| Name a Valid African Country | 0 | - | 4.98 | 125,824 |
| U.S. State Border Crossings | 0 | - | 4.96 | 82,767 |
| U.S. State Nicknames Quiz | 0 | - | 4.48 | 46,589 |
| U.S. Citizenship Test Questions | 0 | - | 4.86 | 223,801 |
| Five Biggest Immigrant Groups by Decade in the US | 0 | - | 4.84 | 34,376 |
| Total United States Immigration by Country | 0 | - | 4.89 | 97,718 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 66,140 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.93 | 148,677 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.94 | 187,847 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 67,992 |
| Win the U.S. Presidential Election | 0 | - | 4.79 | 519,069 |
| Presidential Actors | 0 | - | 4.33 | 17,933 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.41 | 22,621 |
| The George Washington Presidency | 0 | - | 4.02 | 13,700 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 12,930 |
| The John Adams Presidency | 0 | - | 4.10 | 8,030 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.34 | 10,732 |
| The Theodore Roosevelt Presidency | 0 | - | 4.33 | 7,173 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.32 | 16,915 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.32 | 20,620 |
| U.S. Vice Presidential Trivia | 0 | - | 4.31 | 11,564 |
| Cities and Towns of Massachusetts | 0 | - | 4.90 | 61,712 |
| U.S. States by First Two Letters in 30 Seconds | 0 | - | 4.64 | 1,257,598 |
| States in a Tank of the U.S. Map | 0 | - | 4.51 | 28,219 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.97 | 342,490 |
| Colleges by U.S. State - Multiple Choice | 0 | - | 4.60 | 21,286 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 135,258 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 191,810 |
| Name a Valid European Country #2 | 0 | - | 4.93 | 85,477 |
| Countries of the Italian Empire | 0 | - | 4.22 | 25,657 |
| Geography of the Spanish Empire | 0 | - | 4.48 | 35,407 |
| Biggest Trading Partners - Spain | 0 | - | 4.90 | 50,719 |
| The United States... or the United Kingdom? | 0 | - | 4.89 | 91,051 |
| Biggest Trading Partners – United Kingdom | 0 | - | 4.90 | 63,090 |
| Lord of the Rings Decoder | 0 | - | 4.58 | 39,383 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 223,702 |
| Prime Ministers of the UK | 0 | - | 4.95 | 385,426 |
| South China Sea Countries | 0 | - | 4.81 | 54,182 |
| Top 10 Asian Countries by Coastline | 0 | - | 4.91 | 90,178 |
| Top 10 Richest Countries in Asia | 0 | - | 4.87 | 82,833 |
| Random Asian Capitals on a Map | 0 | - | 4.83 | 45,588 |
| Qatar Country Quiz | 0 | - | 4.82 | 28,704 |
| Countries Bordering Iran | 0 | - | 4.82 | 88,946 |
| Countries that Border Iraq | 0 | - | 4.97 | 102,319 |
| Biggest Trading Partners - Turkey | 0 | - | 4.82 | 45,676 |
| Countries Closest to Turkey | 0 | - | 4.94 | 107,319 |
| Countries Bordering Turkey | 0 | - | 4.98 | 109,737 |
| Countries Closest to Egypt | 0 | - | 4.85 | 80,351 |
| Countries Bordering Saudi Arabia | 0 | - | 4.94 | 112,626 |
| Oman Country Quiz | 0 | - | 4.85 | 24,040 |
| Countries Closest to Cyprus | 0 | - | 4.81 | 46,164 |
| Jordan Country Quiz | 0 | - | 4.83 | 28,157 |
| Countries Closest to Indonesia | 0 | - | 4.96 | 86,733 |
| Countries Closest to Vietnam | 0 | - | 4.96 | 87,559 |
| Countries Bordering Myanmar | 0 | - | 4.85 | 71,675 |
| Brunei Country Quiz | 0 | - | 4.88 | 19,720 |
| Countries that Border China | 0 | - | 4.96 | 235,027 |
| Countries that Visit Japan the Most | 0 | - | 4.93 | 70,200 |
| Most-Visited Countries by Japanese | 0 | - | 4.95 | 53,968 |
| Countries that Beat Japan | 0 | - | 4.44 | 61,457 |
| Countries Closest to Japan | 0 | - | 4.93 | 128,334 |
| Closest Countries to North Korea | 0 | - | 4.92 | 105,621 |
| Bhutan Country Quiz | 0 | - | 4.88 | 21,782 |
| Countries Bordering India | 0 | - | 4.98 | 156,680 |
| Countries Closest to India | 0 | - | 4.96 | 95,077 |
| Countries with the Most Hindus | 0 | - | 4.91 | 114,333 |
| Biggest Trading Partners – Australia | 0 | - | 4.89 | 48,261 |
| Countries that Beat Australia | 0 | - | 4.84 | 71,005 |
| 10 Longest Rivers in the United States | 0 | - | 4.82 | 35,315 |
| Rivers of the United States | 0 | - | 4.92 | 57,756 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.96 | 279,671 |
| Pixelated United States Map | 0 | - | 4.90 | 83,150 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 94,743 |
| Countries that Visit the United States the Most | 0 | - | 4.95 | 79,850 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 125,727 |
| Top 10 U.S. States by Republican Party Support | 0 | - | 4.43 | 69,713 |
| Top 10 U.S. States by Democratic Party Support | 0 | - | 4.69 | 74,493 |
| Top 10 U.S. Swing States in the 2024 Election | 0 | - | 4.52 | 70,576 |
| The George W. Bush Presidency | 0 | - | 4.06 | 31,010 |
| The Bill Clinton Presidency | 0 | - | 4.18 | 30,283 |
| The George H. W. Bush Presidency | 0 | - | 4.35 | 20,627 |
| The Ronald Reagan Presidency | 0 | - | 4.25 | 23,721 |
| The Richard Nixon Presidency | 0 | - | 4.10 | 20,928 |
| The Jimmy Carter Presidency | 0 | - | 4.39 | 18,144 |
| The Barack Obama Presidency | 0 | - | 4.17 | 23,739 |
| Countries Closest to Alaska | 0 | - | 4.91 | 100,041 |
| Hawaiian Islands Map Quiz | 0 | - | 4.88 | 21,197 |
| Countries Closest to Maine | 0 | - | 4.86 | 59,661 |
