| U.S. Presidents by Picture | 0 | - | 4.87 | 428,686 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 383,745 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,728,306 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 193,911 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,914 |
| Vatican City Country Quiz | 0 | - | 4.53 | 44,687 |
| Prime Ministers of the UK | 0 | - | 4.95 | 442,748 |
| Soviet Leaders 1917–1991 | 0 | - | 4.44 | 95,617 |
| Most-Visited Countries by Popes | 0 | - | 4.56 | 84,215 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 306,316 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 70,621 |
| Ultimate Harry Potter Name Game | 0 | - | 4.94 | 494,820 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 440,067 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,614 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 109,605 |
| U.S. Presidents by Event | 0 | - | 4.58 | 35,399 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.62 | 94,699 |
| Presidential Middle Names | 0 | - | 4.42 | 60,768 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,289 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,717 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,919 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 35,230 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,644 |
| U.S. President Scramble | 0 | - | 4.40 | 117,503 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,363 |
| U.S. Presidents by Picture - Multiple Choice | 0 | - | 4.50 | 29,058 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 48,100 |
| Top 10 Oldest African Countries | 0 | - | 4.88 | 28,275 |
| Random Sequential European Countries on a Map | 0 | - | 4.99 | 218,123 |
| Countries of the Soviet Union | 0 | - | 4.98 | 195,641 |
| Soviet Union Country Quiz | 0 | - | 4.91 | 81,195 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,487 |
| Figures from Greek Mythology | 0 | - | 4.91 | 189,021 |
| Prime Ministers of Australia | 0 | - | 4.51 | 32,213 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,890 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 73,130 |
| U.S. Vice Presidents | 0 | - | 4.39 | 137,099 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,374 |
| U.S. Presidential Running Mates | 0 | - | 4.41 | 28,787 |
| First Ladies of the United States | 0 | - | 4.28 | 86,004 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,328 |
| U.S. Presidents in Order by First Letter | 0 | - | 4.32 | 77,503 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,378 |
| Add a Letter - Make a U.S. President | 0 | - | 4.58 | 24,108 |
| Win the 1828 U.S. Presidential Election | 0 | - | 4.31 | 59,361 |
| Canadian Prime Ministers | 0 | - | 4.64 | 57,961 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,957 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,466 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 85,741 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,902 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.97 | 71,938 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,653 |
| Byzantine History | 0 | - | 4.91 | 29,033 |
| Byzantine Emperors | 0 | - | 4.93 | 14,627 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,914 |
| Name the English Monarchs | 0 | - | 4.91 | 506,975 |
| Countries Most-Visited By Queen Elizabeth II | 0 | - | 4.42 | 52,004 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,621 |
| Country by Photo of its Leader | 0 | - | 4.70 | 124,689 |
| The Bill Clinton Presidency | 0 | - | 4.24 | 31,548 |
| The George H. W. Bush Presidency | 0 | - | 4.36 | 21,560 |
| The Ronald Reagan Presidency | 0 | - | 4.26 | 24,899 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.38 | 24,083 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,938 |
| The Barack Obama Presidency | 0 | - | 4.14 | 25,516 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,875 |
| Every European Country Shape | 0 | - | 4.96 | 203,126 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 97,280 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 134,492 |
| All Modern-Day Countries Ever Controlled by Greeks | 0 | - | 4.98 | 54,707 |
| The Trojan War | 0 | - | 4.83 | 40,020 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 652,400 |
| Name that Greek Letter | 0 | - | 4.93 | 325,124 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 113,071 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,582 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,642 |
| Roman Emperors | 0 | - | 4.95 | 121,322 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 61,732 |
| Countries of Iberia in History with a Map | 0 | - | 4.88 | 42,453 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,943 |
| James Bond Countries Visited Map | 0 | - | 4.99 | 64,815 |
| Basic Harry Potter Quiz | 0 | - | 4.56 | 379,760 |
| Commonwealth of Nations Countries | 0 | - | 4.95 | 238,498 |
| All Modern-Day Countries Ever Controlled by Chinese People | 0 | - | 4.81 | 55,247 |
| National Founders | 0 | - | 4.40 | 83,984 |
| The George Washington Presidency | 0 | - | 4.03 | 14,618 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,786 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,762 |
| The John Adams Presidency | 0 | - | 4.12 | 8,796 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,998 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,782 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,386 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,768 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,936 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,829 |
| Random U.S. Presidents by Picture | 0 | - | 4.40 | 66,638 |
| The John F. Kennedy Presidency | 0 | - | 4.47 | 43,947 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,778 |
| Random European Countries on a Map | 0 | - | 4.97 | 285,247 |
| Europe Map with Random Merged Countries | 0 | - | 4.97 | 320,692 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 89,802 |
| All Modern-Day Countries Ever Controlled by French People | 0 | - | 4.99 | 58,544 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 75,493 |
| Olympian Gods Quiz | 0 | - | 4.96 | 504,062 |
| Ancient Greek Words | 0 | - | 4.93 | 112,568 |
| Roman to Greek God | 0 | - | 4.52 | 123,391 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 127,704 |
| Ancient Rome - True or False? | 0 | - | 4.85 | 43,325 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,558 |
| Biggest Trading Partners – United Kingdom | 0 | - | 4.93 | 81,030 |
| Shakespeare's Plays Quiz | 0 | - | 4.37 | 390,328 |
| Shakespeare Quotes | 0 | - | 4.43 | 71,598 |
| Harry Potter: Voldemort's Horcruxes | 0 | - | 4.45 | 113,107 |
| Groups of Things - Harry Potter | 0 | - | 4.78 | 282,821 |
| Tolkien's Middle Earth Map Quiz | 0 | - | 4.92 | 38,248 |
| Name the Popes Quiz | 0 | - | 4.47 | 139,024 |
| Countries of the Popes | 0 | - | 4.79 | 128,806 |
| The Dictator Files: Saddam Hussein | 0 | - | 4.48 | 15,943 |
| George Washington... or George W. Bush? | 0 | - | 4.16 | 12,307 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,152 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,869 |
| George Bush... or George Bush | 0 | - | 3.98 | 8,239 |
| Europe Map Quiz | 0 | - | 5.00 | 4,790,628 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 532,765 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 35,214 |
| History of Russia Quiz | 0 | - | 4.47 | 32,011 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 94,464 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.46 | 26,951 |
| History of France | 0 | - | 4.61 | 57,673 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 145,939 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 20,988 |
| Least Irish U.S. States | 0 | - | 4.49 | 18,407 |
| History of Italy | 0 | - | 4.55 | 32,165 |
| Biggest Cities Once in the Roman Empire | 0 | - | 4.81 | 76,187 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,835 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,445 |
| Invasions of Great Britain | 0 | - | 4.51 | 60,120 |
| Biggest British Empire Countries | 0 | - | 4.74 | 100,545 |
| Name the Harry Potter Books | 0 | - | 4.31 | 280,888 |
| Harry Potter Spells | 0 | - | 4.30 | 140,114 |
| Harry Potter Places | 0 | - | 4.35 | 108,789 |
| Harry Potter - Order of the Phoenix Members | 0 | - | 4.06 | 43,230 |
| Top 100 Harry Potter Characters by Mention | 0 | - | 4.93 | 397,664 |
| Harry Potter Creatures | 0 | - | 4.30 | 64,489 |
| Word Scramble - Harry Potter Characters | 0 | - | 4.20 | 61,151 |
| Harry Potter Characters by Screen Time | 0 | - | 4.28 | 148,902 |
| 100 Most Common Words in Beatles Songs | 0 | - | 4.52 | 26,016 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,478 |
| Countries the UK Declared War On | 0 | - | 4.55 | 123,317 |
| Geography of the British Empire | 0 | - | 4.48 | 39,858 |
| Top 100 UK Baby Girls' Names in 1850 | 0 | - | 4.32 | 62,619 |
| Random Sequential Asian Countries on a Map | 0 | - | 4.99 | 119,646 |
| Paramount Leaders of China | 0 | - | 4.36 | 11,135 |
| The Dictator Files: Chairman Mao | 0 | - | 4.28 | 20,763 |
| Colonies of Africa with a Map | 0 | - | 4.79 | 54,799 |
| Random Sequential African Countries on a Map | 0 | - | 5.00 | 128,421 |
| Communist Countries in History | 0 | - | 4.63 | 498,506 |
| Political Movements by Country | 0 | - | 4.46 | 72,794 |
| History of South Africa | 0 | - | 4.60 | 17,773 |
| Oceania Map Quiz | 0 | - | 4.98 | 659,849 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.96 | 51,528 |
| Australian Capitals | 0 | - | 4.92 | 62,845 |
| Australia Map Quiz | 0 | - | 4.95 | 346,319 |
| Flags of North and South America | 0 | - | 4.99 | 377,526 |
| History of Mexico | 0 | - | 4.52 | 15,371 |
| South America Map Quiz | 0 | - | 5.00 | 1,557,402 |
| The Dictator Files: Fidel Castro | 0 | - | 4.19 | 12,404 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,032,428 |
| United States Map Quiz | 0 | - | 4.98 | 4,172,454 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 80,163 |
| U.S. States by Governor | 0 | - | 4.43 | 18,117 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,605 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,772 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,789 |
| Red State or Blue State Trait? | 0 | - | 4.42 | 55,741 |
| Presidential Actors | 0 | - | 4.36 | 19,261 |
| The Jimmy Carter Presidency | 0 | - | 4.41 | 19,237 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 20,149 |
| U.S. Presidents True or False | 0 | - | 3.96 | 15,653 |
| The Kennedy Family | 0 | - | 3.90 | 14,105 |
| Events in U.S. History | 0 | - | 4.41 | 28,837 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,207 |
| U.S. History for Dummies | 0 | - | 4.47 | 83,443 |
| The Most Recent... United States | 0 | - | 4.46 | 18,586 |
| The American Civil War | 0 | - | 4.62 | 52,640 |
| Random Sequential U.S. States on a Map | 0 | - | 4.99 | 235,356 |
| Canada Provinces and Territories | 0 | - | 5.00 | 346,614 |
| Canada Provinces Map Quiz | 0 | - | 4.99 | 644,941 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 214,146 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,960 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.75 | 12,352 |
| Countries That Use the Euro | 0 | - | 4.95 | 107,021 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,259,760 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,796 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 366,404 |
| Official European Union Languages | 0 | - | 4.97 | 239,913 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,734 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,336,487 |
| Europe Geography Decoder | 0 | - | 4.87 | 70,353 |
| 10 Easternmost Countries in Europe | 0 | - | 4.87 | 117,326 |
