| Prime Ministers of the UK | 0 | - | 4.96 | 434,644 |
| Most-Visited Countries by Popes | 0 | - | 4.55 | 83,179 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,654,384 |
| Country by Photo of its Leader | 0 | - | 4.74 | 123,262 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,678 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 423,741 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 379,569 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,361 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,041 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 189,854 |
| Play-Doh Presidents | 0 | - | 5.00 | 81,676 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,327 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 148,948 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,423 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,417 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,112 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,020 |
| Soviet Leaders 1917–1991 | 0 | - | 4.43 | 94,433 |
| Name the Popes Quiz | 0 | - | 4.47 | 137,158 |
| Countries of the Popes | 0 | - | 4.79 | 127,218 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 105,898 |
| Every African Country Shape | 0 | - | 4.90 | 86,113 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,526 |
| U.S. Vice Presidents | 0 | - | 4.41 | 134,937 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 107,949 |
| U.S. Presidents by Event | 0 | - | 4.58 | 33,499 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 93,001 |
| Presidential Middle Names | 0 | - | 4.41 | 59,702 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 52,737 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 93,819 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,172 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,255 |
| Every European Country Shape | 0 | - | 4.96 | 200,171 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,637 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,520 |
| Olympian Gods Quiz | 0 | - | 4.96 | 496,128 |
| The Trojan War | 0 | - | 4.83 | 39,428 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 641,915 |
| Name that Greek Letter | 0 | - | 4.94 | 321,666 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,536 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,313 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,046 |
| Roman Emperors | 0 | - | 4.95 | 118,490 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,280 |
| James Bond Countries Visited Map | 0 | - | 4.99 | 63,485 |
| Name the English Monarchs | 0 | - | 4.92 | 497,898 |
| Vatican City Country Quiz | 0 | - | 4.53 | 44,002 |
| Every Asian Country Shape | 0 | - | 4.95 | 86,703 |
| Paramount Leaders of China | 0 | - | 4.36 | 10,998 |
| The Dictator Files: Chairman Mao | 0 | - | 4.28 | 20,574 |
| National Founders | 0 | - | 4.40 | 83,649 |
| Africa Flags Map Quiz | 0 | - | 4.94 | 35,937 |
| Random African Countries on a Map | 0 | - | 4.99 | 293,386 |
| Eastern Africa Map Quiz | 0 | - | 4.98 | 78,191 |
| Random American Countries on a Map | 0 | - | 4.96 | 98,636 |
| South America Flags Map Quiz | 0 | - | 4.95 | 86,621 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 303,372 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,745 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 69,417 |
| U.S. State Flags | 0 | - | 4.89 | 167,094 |
| U.S. States that Start with M - Shape Quiz | 0 | - | 4.94 | 57,653 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,147 |
| Random European Countries on a Map | 0 | - | 4.97 | 281,974 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 88,045 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.37 | 48,288 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 72,464 |
| Ancient Greek Words | 0 | - | 4.92 | 110,691 |
| 101 Figures from Greek Mythology | 0 | - | 5.00 | 124,288 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 433,545 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,617 |
| Top 100 Harry Potter Characters by Mention | 0 | - | 4.93 | 389,818 |
| Pope Facts | 0 | - | 4.39 | 31,039 |
| Random Asian Countries on a Map | 0 | - | 4.90 | 168,767 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.68 | 55,177 |
| Colonies of Africa with a Map | 0 | - | 4.77 | 53,945 |
| Random Sequential African Countries on a Map | 0 | - | 5.00 | 126,749 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,737 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 28,882 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.49 | 11,670 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,166 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,364 |
| First Ladies of the United States | 0 | - | 4.28 | 85,245 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,088 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,815 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,111 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 76,283 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,447 |
| U.S. President Scramble | 0 | - | 4.40 | 116,201 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,002 |
| Add a Letter - Make a U.S. President | 0 | - | 4.61 | 23,833 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,023 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,695 |
| U.S. Map with Random Merged States | 0 | - | 4.94 | 300,035 |
| Shapes of Mediterranean Sea Countries | 0 | - | 4.80 | 55,600 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,686 |
| Europe Map Quiz | 0 | - | 5.00 | 4,731,319 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 526,352 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,745 |
| Random Sequential European Countries on a Map | 0 | - | 4.99 | 216,146 |
| Europe Map with Random Merged Countries | 0 | - | 4.97 | 315,728 |
| History of Russia Quiz | 0 | - | 4.49 | 31,794 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 93,548 |
| History of France | 0 | - | 4.59 | 56,046 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,775 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,771 |
| Figures from Greek Mythology | 0 | - | 4.91 | 184,948 |
| Word Chain - Greek and Roman Mythology | 0 | - | 4.53 | 56,170 |
| History of Italy | 0 | - | 4.55 | 31,814 |
| Countries Italy Declared War On | 0 | - | 4.75 | 42,952 |
| Byzantine History | 0 | - | 4.91 | 28,620 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,482 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 76,981 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,388 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,174 |
| Countries the UK Declared War On | 0 | - | 4.61 | 121,779 |
| Geography of the British Empire | 0 | - | 4.48 | 39,472 |
| Medieval English History | 0 | - | 4.53 | 43,319 |
| Random Sequential Asian Countries on a Map | 0 | - | 4.99 | 118,271 |
| Prime Ministers of Israel | 0 | - | 3.97 | 17,820 |
| Communist Countries in History | 0 | - | 4.63 | 492,513 |
| Political Movements by Country | 0 | - | 4.46 | 72,260 |
| History of India | 0 | - | 4.61 | 21,284 |
| Countries of Africa | 0 | - | 5.00 | 2,507,850 |
| Africa Cities Map Quiz | 0 | - | 4.97 | 98,434 |
| Flags of Africa Quiz | 0 | - | 5.00 | 463,355 |
| Africa Map Quiz | 0 | - | 5.00 | 2,104,301 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 45,814 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 266,531 |
| Top 10 Biggest African Countries by Area | 0 | - | 4.99 | 215,628 |
| 10 Southernmost Countries in Africa | 0 | - | 4.98 | 115,576 |
| 10 Northernmost Countries in Africa | 0 | - | 4.98 | 160,275 |
| Top 10 Smallest African Countries by Area | 0 | - | 4.96 | 32,505 |
| African East Coast | 0 | - | 4.96 | 95,046 |
| African Countries with the Shortest Names | 0 | - | 4.98 | 152,110 |
| Western Africa Map Quiz | 0 | - | 4.97 | 72,925 |
| Top African Languages on a Map | 0 | - | 4.92 | 72,451 |
| African Island Countries | 0 | - | 4.96 | 100,790 |
| Countries of Africa with an Empty Map | 0 | - | 5.00 | 241,658 |
| All First-Level Subdivisions of Africa on a Map | 0 | - | 4.92 | 32,689 |
| History of South Africa | 0 | - | 4.60 | 17,602 |
| Oceania Map Quiz | 0 | - | 4.98 | 635,307 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 49,798 |
| Australian States and Territories | 0 | - | 4.95 | 140,855 |
| Australian Capitals | 0 | - | 4.92 | 62,593 |
| Australian Immigration by Country | 0 | - | 4.81 | 77,020 |
| Australia Map Quiz | 0 | - | 4.94 | 342,480 |
| Australia True or False | 0 | - | 4.87 | 56,504 |
| Flags of North and South America | 0 | - | 4.99 | 367,216 |
| 10 Biggest American Countries by Area | 0 | - | 4.95 | 112,155 |
| Top 10 Most Populous American Countries | 0 | - | 4.97 | 143,163 |
| Latin American Countries Map Quiz | 0 | - | 4.97 | 128,227 |
| History of Mexico | 0 | - | 4.58 | 15,230 |
| South America Map Quiz | 0 | - | 5.00 | 1,541,222 |
| Central America and Caribbean Map Quiz | 0 | - | 4.89 | 899,791 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,011,647 |
| North America Map Quiz | 0 | - | 4.98 | 244,429 |
| Third Most Common Language by U.S. State | 0 | - | 4.89 | 113,377 |
| United States Map Quiz | 0 | - | 4.98 | 4,141,828 |
| Topological Map of the USA Quiz | 0 | - | 4.49 | 28,850 |
| U.S. States by Governor | 0 | - | 4.43 | 17,984 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,376 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,573 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 42,166 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,546 |
| Red State or Blue State Trait? | 0 | - | 4.42 | 54,941 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 28,461 |
| The Bill Clinton Presidency | 0 | - | 4.22 | 31,352 |
| The George H. W. Bush Presidency | 0 | - | 4.36 | 21,419 |
| The Ronald Reagan Presidency | 0 | - | 4.26 | 24,721 |
| The George Washington Presidency | 0 | - | 4.03 | 14,475 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,661 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,500 |
| The John Adams Presidency | 0 | - | 4.12 | 8,676 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,870 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,682 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,214 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,609 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,773 |
| Random U.S. Presidents by Picture | 0 | - | 4.39 | 65,820 |
| The Barack Obama Presidency | 0 | - | 4.16 | 25,256 |
| American Founding Fathers | 0 | - | 4.41 | 23,074 |
| The American Revolution | 0 | - | 4.52 | 54,057 |
| American History Quotes #1 | 0 | - | 4.37 | 95,688 |
| People on Money - United States | 0 | - | 4.31 | 63,206 |
| American History Quotes #2 | 0 | - | 4.38 | 41,223 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,240 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 44,731 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 32,993 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,644 |
| U.S. History for Dummies | 0 | - | 4.47 | 82,483 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,078 |
| The American Civil War | 0 | - | 4.62 | 52,160 |
| US States Quiz | 0 | - | 5.00 | 16,700,836 |
| U.S. State Quarters Picture Quiz #1 | 0 | - | 4.45 | 52,665 |
| U.S. State Quarters Picture Quiz #2 | 0 | - | 4.74 | 38,317 |
| U.S. License Plates Picture Quiz | 0 | - | 4.59 | 52,663 |
| Satellite Images - U.S. States | 0 | - | 4.53 | 44,913 |
| U.S. States by Emoji | 0 | - | 4.48 | 100,148 |
| U.S. State Shapes Quiz #1 | 0 | - | 4.74 | 152,367 |
| U.S. State Shapes Quiz #2 | 0 | - | 4.80 | 101,765 |
