| Countries of the Japanese Empire | 0 | - | 4.96 | 101,353 |
| Countries of Europe After World War II | 0 | - | 4.99 | 178,733 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 147,450 |
| Neutral European Countries of WWII | 0 | - | 4.92 | 154,375 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 99,456 |
| Deadliest U.S. Wars | 0 | - | 4.84 | 165,383 |
| Prime Ministers of the UK | 0 | - | 4.95 | 407,496 |
| Asian Countries with the Most Christians | 0 | - | 4.87 | 90,735 |
| Countries with the Most Hindus | 0 | - | 4.90 | 118,215 |
| Hindu Countries | 0 | - | 4.85 | 45,940 |
| Countries Italy Declared War On | 0 | - | 4.75 | 41,530 |
| Byzantine History | 0 | - | 4.87 | 27,369 |
| The Vietnam War | 0 | - | 4.42 | 33,996 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 415,326 |
| Two Letter Roman Numerals | 0 | - | 4.98 | 52,169 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,389,182 |
| Asia Map Quiz | 0 | - | 4.99 | 843,925 |
| Middle East Map Quiz | 0 | - | 4.99 | 1,331,518 |
| The Iraq War | 0 | - | 4.46 | 14,932 |
| The American Revolution | 0 | - | 4.52 | 52,888 |
| Countries of the Soviet Union | 0 | - | 4.98 | 189,192 |
| Soviet Union Country Quiz | 0 | - | 4.91 | 77,215 |
| The Reign of Napoleon | 0 | - | 4.54 | 37,306 |
| Figures from Greek Mythology | 0 | - | 4.90 | 174,822 |
| The Life of Winston Churchill | 0 | - | 4.10 | 11,572 |
| Places Where Winston Churchill Said We Would Fight the Nazis | 0 | - | 4.55 | 14,149 |
| Flags of Asia Quiz | 0 | - | 4.99 | 560,716 |
| East Asia Cities Map Quiz | 0 | - | 4.97 | 105,016 |
| 10 Biggest Asian Countries by Area | 0 | - | 4.97 | 146,869 |
| 10 Southernmost Countries in Asia | 0 | - | 4.97 | 93,616 |
| 10 Easternmost Countries in Asia | 0 | - | 4.98 | 101,864 |
| Countries of Asia with Two or More Words | 0 | - | 4.96 | 118,206 |
| Asian Countries Ending in "IA" | 0 | - | 4.96 | 99,904 |
| Top Asian Languages on a Map | 0 | - | 4.94 | 65,577 |
| South and Central Asia Map Quiz | 0 | - | 4.93 | 88,085 |
| Countries of Asia with an Empty Map | 0 | - | 4.98 | 219,559 |
| All First-Level Subdivisions of Asia on a Map | 0 | - | 4.94 | 43,330 |
| Countries of the Middle East | 0 | - | 4.95 | 185,697 |
| Provinces of China | 0 | - | 4.97 | 176,002 |
| China Cities Map Quiz | 0 | - | 4.90 | 93,232 |
| Provinces of China Map Quiz | 0 | - | 4.93 | 87,727 |
| Japanese Prefectures | 0 | - | 4.98 | 120,006 |
| Japan Country Quiz | 0 | - | 4.92 | 126,606 |
| States of India | 0 | - | 4.94 | 172,439 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.63 | 53,585 |
| Countries with the Most Ascents of Mount Everest | 0 | - | 4.95 | 55,150 |
| Nepal Country Quiz | 0 | - | 4.95 | 35,285 |
| African Countries with the Most Christians | 0 | - | 4.92 | 71,299 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 115,153 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,397,694 |
| Canadian Prime Ministers Quiz | 0 | - | 4.63 | 53,326 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 188,536 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 141,187 |
| Soviet Leaders 1917–1991 | 0 | - | 4.42 | 90,785 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 134,894 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 108,244 |
| English Monarchs Quiz | 0 | - | 4.90 | 471,231 |
| Asian Geography By Letter - B | 0 | - | 4.84 | 63,676 |
| 10 Asian Countries with the Most Tourists | 0 | - | 4.88 | 98,115 |
| Top 10 Coldest Asian Countries | 0 | - | 4.95 | 119,625 |
| Asian Countries with the Shortest Names | 0 | - | 4.97 | 128,044 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.88 | 107,744 |
| Pixelated Asia Map | 0 | - | 4.91 | 67,513 |
| Monarchies of Asia | 0 | - | 4.96 | 67,612 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.89 | 100,422 |
| Category Elimination - Asian Geography #2 | 0 | - | 4.94 | 88,590 |
| Name a Valid Asian Country | 0 | - | 4.98 | 113,532 |
| Countries Closest to the Persian Gulf | 0 | - | 4.92 | 79,898 |
| Provinces of Turkey | 0 | - | 4.95 | 188,652 |
| Countries with the Most Arabic Speakers | 0 | - | 4.91 | 74,662 |
| Countries in Southeast Asia With an Empty Map | 0 | - | 4.97 | 96,556 |
| Battle to Country | 0 | - | 4.91 | 48,090 |
| Brunei Country Quiz | 0 | - | 4.88 | 20,661 |
| Chinese Inventions | 0 | - | 4.29 | 33,116 |
| History of China | 0 | - | 4.38 | 53,632 |
| China A-Z | 0 | - | 4.64 | 63,547 |
| Countries that Beat China | 0 | - | 4.85 | 108,478 |
| Countries that Border China | 0 | - | 4.96 | 253,759 |
| Countries that Visit Japan the Most | 0 | - | 4.93 | 72,920 |
| Most-Visited Countries by Japanese | 0 | - | 4.95 | 56,390 |
| Countries Closest to Japan | 0 | - | 4.92 | 132,694 |
| Closest Countries to North Korea | 0 | - | 4.91 | 108,959 |
| Bhutan Country Quiz | 0 | - | 4.89 | 22,738 |
| History of India | 0 | - | 4.60 | 20,389 |
| Countries Bordering India | 0 | - | 4.98 | 159,273 |
| Countries Closest to India | 0 | - | 4.96 | 98,141 |
| Top 10 Richest Countries in Africa | 0 | - | 4.87 | 71,985 |
| Biggest Trading Partners – Australia | 0 | - | 4.92 | 57,742 |
| Arms Exports - United States | 0 | - | 4.63 | 49,421 |
| The American Civil War | 0 | - | 4.61 | 50,467 |
| Top 10 Richest Countries in Europe | 0 | - | 4.90 | 142,649 |
| Biggest Trading Partners - European Union | 0 | - | 4.91 | 68,771 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 82,003 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.32 | 41,468 |
| States of the German Confederation in 1848 | 0 | - | 4.85 | 28,946 |
| The Trojan War | 0 | - | 4.81 | 37,441 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 610,173 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.86 | 101,256 |
| Ancient Roman Trivia #1 | 0 | - | 4.83 | 74,460 |
| Roman Emperors | 0 | - | 4.96 | 108,109 |
| South China Sea Countries | 0 | - | 4.82 | 55,965 |
| Top 10 Asian Countries by Coastline | 0 | - | 4.91 | 93,136 |
| Qatar Country Quiz | 0 | - | 4.83 | 29,830 |
| Countries Bordering Iran | 0 | - | 4.83 | 91,522 |
| History of Iran Quiz | 0 | - | 4.63 | 15,624 |
| Countries that Border Iraq | 0 | - | 4.97 | 104,742 |
| Countries Closest to Turkey | 0 | - | 4.94 | 110,774 |
| Countries Bordering Turkey | 0 | - | 4.98 | 112,646 |
| Ottoman Empire Quiz | 0 | - | 4.43 | 16,337 |
| History of Egypt | 0 | - | 4.58 | 23,221 |
| Egypt Country Quiz | 0 | - | 4.81 | 74,135 |
| Countries Bordering Saudi Arabia | 0 | - | 4.94 | 114,917 |
| Countries Closest to Yemen | 0 | - | 4.88 | 20,378 |
| Oman Country Quiz | 0 | - | 4.85 | 25,193 |
| Countries Closest to Cyprus | 0 | - | 4.83 | 49,967 |
| Jordan Country Quiz | 0 | - | 4.85 | 29,616 |
| Countries Closest to Indonesia | 0 | - | 4.96 | 90,098 |
| Countries Closest to Vietnam | 0 | - | 4.96 | 90,224 |
| Countries Bordering Myanmar | 0 | - | 4.85 | 74,058 |
| Axis Occupied Countries of WWII | 0 | - | 4.99 | 218,034 |
| Countries in World War I | 0 | - | 4.88 | 218,435 |
| Biggest Trading Partners - China | 0 | - | 4.95 | 72,876 |
| The Life of Gandhi | 0 | - | 4.37 | 12,791 |
| Prime Ministers of Australia | 0 | - | 4.50 | 29,953 |
| Biggest Trading Partners - Colombia | 0 | - | 4.88 | 38,032 |
| U.S. Presidents by Picture | 0 | - | 4.85 | 408,649 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 367,242 |
| U.S. Civil War Decoder | 0 | - | 4.18 | 24,620 |
| Category Elimination - U.S. States #1 | 0 | - | 4.91 | 206,094 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.70 | 55,965 |
| Arms Exports - Russia | 0 | - | 4.45 | 23,999 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 67,089 |
| Countries of the German Empire | 0 | - | 4.51 | 35,764 |
| Olympian Gods Quiz | 0 | - | 4.96 | 469,386 |
| Name that Greek Letter | 0 | - | 4.94 | 308,881 |
| Ancient Greek Words | 0 | - | 4.92 | 104,303 |
| Roman to Greek God | 0 | - | 4.51 | 117,848 |
| Countries Closest to Spain A-Z | 0 | - | 4.99 | 103,667 |
| Biggest Trading Partners - Spain | 0 | - | 4.90 | 52,145 |
| Biggest Trading Partners – United Kingdom | 0 | - | 4.92 | 75,040 |
| Countries Closest to the United Kingdom A-Z | 0 | - | 4.96 | 183,763 |
| Shakespeare's Plays Quiz | 0 | - | 4.40 | 370,316 |
| Countries and States in the Caucasus | 0 | - | 4.46 | 48,817 |
| Asian Countries by Borders in 30 Seconds | 0 | - | 4.45 | 395,219 |
| The Only Remaining Asian Country . . . | 0 | - | 4.70 | 42,468 |
| Countries that Have Controlled Mesopotamia | 0 | - | 4.19 | 14,954 |
| The Persian Gulf War | 0 | - | 4.00 | 8,014 |
| Countries Surrounding Istanbul | 0 | - | 4.88 | 23,414 |
| Countries Closest to Egypt | 0 | - | 4.83 | 82,780 |
| 10 Plagues of Egypt | 0 | - | 4.41 | 45,103 |
| Countries Closest to Israel | 0 | - | 4.75 | 102,351 |
| Mekong River Countries Empty Map Quiz | 0 | - | 4.84 | 50,953 |
| Biggest Axis-Controlled Cities | 0 | - | 4.42 | 46,828 |
| Chinese Zodiac Quiz | 0 | - | 4.74 | 123,007 |
| China Country Quiz | 0 | - | 4.41 | 109,860 |
| Overseas Chinese Population | 0 | - | 4.54 | 41,626 |
| Paramount Leaders of China | 0 | - | 4.33 | 10,442 |
| The Dictator Files: Chairman Mao | 0 | - | 4.33 | 19,622 |
| Mongolia Country Quiz | 0 | - | 4.70 | 37,418 |
| Taiwan Country Quiz | 0 | - | 4.65 | 41,463 |
| Afghanistan Country Quiz | 0 | - | 4.44 | 40,416 |
| Bangladesh Country Quiz | 0 | - | 4.75 | 40,603 |
| Pakistan Country Quiz | 0 | - | 4.53 | 58,095 |
| India Country Quiz | 0 | - | 4.42 | 123,572 |
| India Cities Map Quiz | 0 | - | 4.62 | 58,557 |
| Countries of the Indian Diaspora | 0 | - | 4.46 | 52,530 |
| Colonies of Africa with a Map | 0 | - | 4.78 | 50,995 |
| African Countries with the Most Muslims | 0 | - | 4.80 | 96,443 |
| U.S. Five-Star Generals and Admirals | 0 | - | 4.35 | 8,075 |
| All U.S. Supreme Court Justices | 0 | - | 4.49 | 27,981 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.41 | 11,065 |
| Name a Valid U.S. President #1 | 0 | - | 4.91 | 177,911 |
| States in a Tank of the U.S. Map | 0 | - | 4.50 | 29,423 |
| Europe Map Quiz | 0 | - | 5.00 | 4,509,874 |
| European Countries by First 2 Letters | 0 | - | 4.96 | 506,058 |
| History of France Quiz | 0 | - | 4.56 | 41,423 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 24,544 |
| Mythology A-Z | 0 | - | 4.30 | 35,410 |
| Countries of the Italian Empire | 0 | - | 4.20 | 26,512 |
| Modern-Day Countries of the Roman Empire on a Map | 0 | - | 4.99 | 118,307 |
| Count in Roman Numerals - 30 Second Sprint | 0 | - | 4.20 | 78,183 |
| Geography of the Dutch Empire | 0 | - | 4.68 | 33,378 |
| Countries of the Spanish Empire | 0 | - | 4.51 | 75,990 |
| Arthurian Legend | 0 | - | 4.32 | 24,643 |
| Invasions of Great Britain | 0 | - | 4.50 | 57,482 |
| Wives of King Henry VIII | 0 | - | 4.54 | 52,313 |
| Countries the UK Declared War On | 0 | - | 4.56 | 116,966 |
| Geography of the British Empire | 0 | - | 4.51 | 38,243 |
| Asian Islands | 0 | - | 4.45 | 20,319 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 69,143 |
| Asian Geography by Letter - H | 0 | - | 4.47 | 63,563 |
| Asian Geography By Letter - M | 0 | - | 4.46 | 59,751 |
| Asian Geography by Letter - P | 0 | - | 4.44 | 55,863 |
| Asian Geography by Letter - T | 0 | - | 4.50 | 55,469 |
| Asian Physical Geography | 0 | - | 4.59 | 34,489 |
| Asia Geography Quiz #1 | 0 | - | 4.78 | 52,107 |
| Asia Geography Quiz #2 | 0 | - | 4.59 | 46,882 |
| East Asian Islands on the Map | 0 | - | 4.53 | 31,875 |
| 10 Westernmost Countries in Asia | 0 | - | 4.68 | 68,477 |
| Asian Diaspora - Top 10 Countries | 0 | - | 4.80 | 39,819 |
