| Countries of the Soviet Union | 0 | - | 4.98 | 195,322 |
| Soviet Union Country Quiz | 0 | - | 4.91 | 80,987 |
| Soviet Leaders 1917–1991 | 0 | - | 4.44 | 95,354 |
| Prime Ministers of the UK | 0 | - | 4.95 | 441,070 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,716,175 |
| Every European Country Shape | 0 | - | 4.96 | 202,504 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.37 | 48,603 |
| Prime Ministers of Australia | 0 | - | 4.51 | 32,110 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 427,761 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 161,992 |
| Biggest Trading Partners – United Kingdom | 0 | - | 4.93 | 80,709 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 109,113 |
| U.S. Presidents by Event | 0 | - | 4.58 | 34,993 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 94,354 |
| Presidential Middle Names | 0 | - | 4.41 | 60,561 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 24,018 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 382,967 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,548 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,762 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,555 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 193,183 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,688 |
| Random European Countries on a Map | 0 | - | 4.97 | 284,576 |
| Europe Map with Random Merged Countries | 0 | - | 4.97 | 319,877 |
| Countries of Europe After World War II | 0 | - | 4.99 | 189,015 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 157,118 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 89,431 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 438,756 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,384 |
| People in Pictures with Queen Elizabeth II | 0 | - | 4.38 | 29,391 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 104,455 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,524 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 35,129 |
| Top 10 Oldest African Countries | 0 | - | 4.88 | 28,127 |
| Random Sequential European Countries on a Map | 0 | - | 4.99 | 217,757 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,997 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 84,417 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,396 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,536 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,316 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,304 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 145,243 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,533 |
| Name the Popes Quiz | 0 | - | 4.47 | 138,648 |
| Countries of the Popes | 0 | - | 4.79 | 128,506 |
| Flags of Countries of the World in 1910 | 0 | - | 4.96 | 79,262 |
| Country by Photo of its Leader | 0 | - | 4.70 | 124,423 |
| Pixelated United States Map | 0 | - | 4.88 | 94,614 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 73,013 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,575 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,714 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,323 |
| First Ladies of the United States | 0 | - | 4.28 | 85,825 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,272 |
| U.S. Presidents in Order by First Letter | 0 | - | 4.32 | 77,334 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,296 |
| Add a Letter - Make a U.S. President | 0 | - | 4.58 | 24,053 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,495 |
| Canadian Prime Ministers | 0 | - | 4.64 | 57,770 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,898 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 650,238 |
| Name that Greek Letter | 0 | - | 4.93 | 324,520 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 61,455 |
| Countries of Iberia in History with a Map | 0 | - | 4.88 | 42,210 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,663 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,328 |
| Name the English Monarchs | 0 | - | 4.91 | 504,998 |
| Every Asian Country Shape | 0 | - | 4.95 | 88,119 |
| Asian Countries with the Most Christians | 0 | - | 4.86 | 97,697 |
| Paramount Leaders of China | 0 | - | 4.36 | 11,112 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,272 |
| Every African Country Shape | 0 | - | 4.90 | 87,995 |
| African Countries with the Most Christians | 0 | - | 4.94 | 75,905 |
| Country Picture Puzzle Game #1 | 0 | - | 4.86 | 86,743 |
| Divided Country Shape Puzzle #1 | 0 | - | 4.88 | 53,762 |
| Biggest Trading Partners – Australia | 0 | - | 4.93 | 61,823 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 96,671 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,668 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 133,803 |
| Random European Flag to Country | 0 | - | 4.90 | 183,606 |
| Flags of Countries That Border Russia | 0 | - | 4.70 | 83,742 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,896 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 71,803 |
| Olympian Gods Quiz | 0 | - | 4.96 | 502,695 |
| The Trojan War | 0 | - | 4.83 | 39,910 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,568 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 126,975 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,415 |
| Roman Emperors | 0 | - | 4.95 | 120,745 |
| Biggest Trading Partners - Spain | 0 | - | 4.92 | 53,900 |
| James Bond Countries Visited Map | 0 | - | 4.99 | 64,548 |
| Commonwealth of Nations Countries | 0 | - | 4.95 | 237,951 |
| Biggest Trading Partners - China | 0 | - | 4.95 | 75,375 |
| The Dictator Files: Chairman Mao | 0 | - | 4.28 | 20,724 |
| Africa Flags Map Quiz | 0 | - | 4.95 | 36,724 |
| Random African Flag to Country | 0 | - | 4.88 | 75,370 |
| Eastern Africa Map Quiz | 0 | - | 4.98 | 79,348 |
| Flags of WW1 | 0 | - | 4.60 | 38,582 |
| Random Sequential Countries on the World Map | 0 | - | 5.00 | 524,607 |
| Countries in a JetPunk Fish of the World Map | 0 | - | 4.99 | 60,539 |
| Countries in a Blue JetPunk Fish of the World Map | 0 | - | 4.92 | 72,240 |
| Flags of the Countries that Start with C | 0 | - | 4.88 | 130,473 |
| Flags of the Countries that Start with I | 0 | - | 4.94 | 154,363 |
| Flags of the Countries that Start with B | 0 | - | 4.97 | 43,292 |
| Flags of the Countries that Start with A | 0 | - | 4.94 | 127,701 |
| Random American Countries on a Map | 0 | - | 4.96 | 99,957 |
| South America Flags Map Quiz | 0 | - | 4.95 | 88,607 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,127 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,846 |
| U.S. Presidential Running Mates | 0 | - | 4.41 | 28,707 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 305,846 |
| The George Washington Presidency | 0 | - | 4.03 | 14,582 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,761 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,718 |
| The John Adams Presidency | 0 | - | 4.12 | 8,769 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,960 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,755 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,349 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,734 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 70,393 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,890 |
| The American Revolution | 0 | - | 4.52 | 54,315 |
| Category Elimination - U.S. States #1 | 0 | - | 4.88 | 221,861 |
| Category Elimination - U.S. States #2 | 0 | - | 4.83 | 135,112 |
| Europe Flag Map - Find the Errors | 0 | - | 4.24 | 61,964 |
| History of Russia Quiz | 0 | - | 4.47 | 31,977 |
| Flags of Countries That Border France | 0 | - | 4.89 | 123,568 |
| Flags of Countries that Border Germany | 0 | - | 4.86 | 97,653 |
| Countries of the German Empire | 0 | - | 4.51 | 38,092 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.98 | 74,862 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,764 |
| Ancient Greek Words | 0 | - | 4.93 | 112,162 |
| History of Italy | 0 | - | 4.55 | 32,099 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,763 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,362 |
| Invasions of Great Britain | 0 | - | 4.51 | 60,022 |
| Tolkien's Middle Earth Map Quiz | 0 | - | 4.92 | 38,063 |
| Top 100 UK Baby Girls' Names in 1850 | 0 | - | 4.35 | 62,414 |
| Countries Most-Visited By Queen Elizabeth II | 0 | - | 4.42 | 51,883 |
| Countries "Ruled" by King Charles III | 0 | - | 4.78 | 82,821 |
| Pope Facts | 0 | - | 4.39 | 31,336 |
| Random Asian Countries on a Map | 0 | - | 4.91 | 170,624 |
| The Dictator Files: Saddam Hussein | 0 | - | 4.48 | 15,905 |
| 10 Plagues of Egypt | 0 | - | 4.41 | 53,885 |
| Flags of Countries that Border China | 0 | - | 4.94 | 99,898 |
| Colonies of Africa with a Map | 0 | - | 4.79 | 54,644 |
| Random African Countries on a Map | 0 | - | 4.99 | 297,247 |
| Africa Map with Random Merged Countries | 0 | - | 4.94 | 74,125 |
| Communist Countries in History | 0 | - | 4.63 | 497,237 |
| Countries that Start with C - Shape Quiz | 0 | - | 4.89 | 99,581 |
| Countries that Start with I - Shape Quiz | 0 | - | 4.86 | 114,437 |
| Countries that Start with B - Shape Quiz | 0 | - | 4.88 | 27,566 |
| Countries that Start with A - Shape Quiz | 0 | - | 4.93 | 34,865 |
| Countries that Start with N - Shape Quiz | 0 | - | 4.94 | 83,056 |
| Random Sequential Countries on the World Map - Hard Version | 0 | - | 5.00 | 76,182 |
| History of South Africa | 0 | - | 4.60 | 17,735 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 80,087 |
| U.S. Political Figures by Picture #1 | 0 | - | 4.14 | 26,199 |
| U.S. Political Figures by Picture #2 | 0 | - | 4.10 | 15,550 |
| Female Political Figures by Picture - U.S. | 0 | - | 4.22 | 10,882 |
| Win the U.S. Presidential Election | 0 | - | 4.78 | 632,143 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,575 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,246 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,862 |
| U.S. President Scramble | 0 | - | 4.40 | 117,296 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,287 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 48,017 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 129,493 |
| Shapes of Mediterranean Sea Countries | 0 | - | 4.80 | 56,008 |
| Biggest European Cities by Letter | 0 | - | 4.55 | 126,899 |
| Europe Map Quiz | 0 | - | 5.00 | 4,778,188 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 531,447 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 35,110 |
| Save Europeans by Guessing Countries | 0 | - | 4.86 | 215,577 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 94,274 |
| History of Austria | 0 | - | 4.70 | 17,945 |
| Geography of the French Empire | 0 | - | 4.45 | 27,187 |
| The French Revolution | 0 | - | 4.47 | 24,099 |
| History of France | 0 | - | 4.61 | 57,425 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,534 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,158 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,986 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 20,903 |
| Figures from Greek Mythology | 0 | - | 4.91 | 188,200 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,534 |
| Byzantine History | 0 | - | 4.91 | 28,972 |
| Byzantine Emperors | 0 | - | 4.92 | 14,468 |
| Count in Roman Numerals - 30 Second Sprint | 0 | - | 4.27 | 103,467 |
| The Vikings! | 0 | - | 4.46 | 28,386 |
| The Portuguese Empire | 0 | - | 4.58 | 12,091 |
| Arthurian Legend | 0 | - | 4.33 | 25,143 |
| Biggest British Empire Countries | 0 | - | 4.74 | 100,314 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,431 |
| Countries the UK Declared War On | 0 | - | 4.55 | 123,064 |
| Geography of the British Empire | 0 | - | 4.48 | 39,800 |
| Medieval English History | 0 | - | 4.53 | 43,612 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 280,177 |
| Random Sequential Asian Countries on a Map | 0 | - | 4.99 | 119,393 |
| History of Iran | 0 | - | 4.66 | 16,398 |
| Prime Ministers of Israel | 0 | - | 3.97 | 18,033 |
