| Countries that Border Iraq | 0 | - | 4.97 | 108,276 |
| Africa Geography Quiz #1 | 0 | - | 4.93 | 49,302 |
| Byzantine History | 0 | - | 4.91 | 28,764 |
| Asian Countries with the Shortest Names | 0 | - | 4.97 | 135,122 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,678 |
| Asia Geography Quiz #1 | 0 | - | 4.70 | 53,482 |
| Asia Geography Quiz #2 | 0 | - | 4.56 | 48,518 |
| Asia Geography Quiz #3 | 0 | - | 4.49 | 32,231 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.85 | 109,812 |
| Category Elimination - Asian Geography #2 | 0 | - | 4.94 | 96,637 |
| Name a Valid Asian Country | 0 | - | 4.98 | 120,844 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,736 |
| Countries Bordering Iran | 0 | - | 4.83 | 95,186 |
| Iraq Country Quiz | 0 | - | 4.43 | 40,899 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,447,216 |
| Asia Map Quiz | 0 | - | 4.99 | 915,237 |
| Egypt Country Quiz | 0 | - | 4.83 | 77,453 |
| Countries that Beat Indonesia | 0 | - | 4.86 | 55,732 |
| Olympian Gods Quiz | 0 | - | 4.96 | 499,963 |
| Middle East Map Quiz | 0 | - | 4.99 | 1,381,760 |
| Geography of Egypt | 0 | - | 4.60 | 21,500 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,326,846 |
| Ancient Greek Words | 0 | - | 4.93 | 111,429 |
| Flags of Asia Quiz | 0 | - | 4.99 | 612,082 |
| South and Central Asia Map Quiz | 0 | - | 4.94 | 98,759 |
| Countries that Beat Egypt | 0 | - | 4.88 | 56,914 |
| Africa Geography Quiz #2 | 0 | - | 4.59 | 32,945 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,227 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,891 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,180 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,200 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,914 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 436,522 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,036 |
| East Asia Cities Map Quiz | 0 | - | 4.96 | 110,127 |
| 10 Biggest Asian Countries by Area | 0 | - | 4.97 | 153,596 |
| 10 Southernmost Countries in Asia | 0 | - | 4.97 | 99,022 |
| 10 Easternmost Countries in Asia | 0 | - | 4.99 | 107,864 |
| Countries of Asia with Two or More Words | 0 | - | 4.96 | 126,721 |
| Asian Countries Ending in "IA" | 0 | - | 4.96 | 107,350 |
| Top Asian Languages on a Map | 0 | - | 4.95 | 71,315 |
| Countries of Asia with an Empty Map | 0 | - | 4.98 | 230,119 |
| All First-Level Subdivisions of Asia on a Map | 0 | - | 4.91 | 49,803 |
| Countries of the Middle East | 0 | - | 4.96 | 200,875 |
| Countries Kim Jong Un Has Been To | 0 | - | 4.95 | 32,753 |
| States of India | 0 | - | 4.95 | 192,846 |
| History of India | 0 | - | 4.62 | 21,406 |
| Countries with the Most Ascents of Mount Everest | 0 | - | 4.95 | 58,161 |
| Nepal Country Quiz | 0 | - | 4.95 | 37,680 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 92,174 |
| Name a Valid African Country | 0 | - | 4.98 | 153,865 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 120,986 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 174,276 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 232,802 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 276,461 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 166,828 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,983 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 78,773 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,387 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,785 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 260,301 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 114,452 |
| Figures from Greek Mythology | 0 | - | 4.91 | 186,579 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,337 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 66,429 |
| 10 Asian Countries with the Most Tourists | 0 | - | 4.89 | 105,833 |
| Top 10 Coldest Asian Countries | 0 | - | 4.95 | 122,896 |
| Asian Countries with the Most Christians | 0 | - | 4.85 | 97,089 |
| Pixelated Asia Map | 0 | - | 4.90 | 73,053 |
| Monarchies of Asia | 0 | - | 4.97 | 71,011 |
| Asian Country Superlatives | 0 | - | 4.84 | 80,797 |
| Flags of the Middle East | 0 | - | 4.69 | 62,581 |
| Countries Closest to the Persian Gulf | 0 | - | 4.93 | 83,307 |
| History of Iran | 0 | - | 4.66 | 16,344 |
| Iran Country Quiz | 0 | - | 4.51 | 60,295 |
| Provinces of Turkey | 0 | - | 4.95 | 203,792 |
| Syria Country Quiz | 0 | - | 4.81 | 32,706 |
| Jordan Country Quiz | 0 | - | 4.86 | 31,705 |
| Countries with the Most Arabic Speakers | 0 | - | 4.92 | 79,982 |
| Countries in Southeast Asia With an Empty Map | 0 | - | 4.97 | 101,366 |
| Provinces of China | 0 | - | 4.97 | 203,766 |
| China Cities Map Quiz | 0 | - | 4.93 | 105,001 |
| Provinces of China Map Quiz | 0 | - | 4.92 | 93,474 |
| History of China | 0 | - | 4.37 | 57,098 |
| Japanese Prefectures | 0 | - | 4.98 | 136,553 |
| Japan Country Quiz | 0 | - | 4.93 | 142,291 |
| Countries Closest to Taiwan | 0 | - | 4.81 | 93,220 |
| States of India Map Quiz | 0 | - | 4.83 | 26,446 |
| Countries Bordering India | 0 | - | 4.98 | 163,360 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.69 | 55,409 |
| Countries that Beat India | 0 | - | 4.42 | 62,897 |
| Countries Closest to India | 0 | - | 4.97 | 102,680 |
| Oceania Geography Quiz | 0 | - | 4.55 | 22,042 |
| South American Geography Quiz #2 | 0 | - | 4.61 | 39,320 |
| South American Geography Quiz #1 | 0 | - | 4.62 | 32,561 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,690,943 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,597 |
| U.S. History for Dummies | 0 | - | 4.47 | 82,972 |
| Europe Geography Quiz #3 | 0 | - | 4.35 | 63,631 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,427 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 89,879 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 646,481 |
| Name that Greek Letter | 0 | - | 4.93 | 323,215 |
| Name the English Monarchs | 0 | - | 4.91 | 501,830 |
| Prime Ministers of the UK | 0 | - | 4.95 | 438,181 |
| Asian Last Names in the United States | 0 | - | 4.43 | 46,728 |
| Top 10 Asian Countries by Coastline | 0 | - | 4.92 | 96,401 |
| Countries that Have Controlled Mesopotamia | 0 | - | 4.15 | 15,551 |
| Countries Closest to Turkey | 0 | - | 4.96 | 125,934 |
| Countries Bordering Turkey | 0 | - | 4.98 | 117,037 |
| Ottoman Empire Quiz | 0 | - | 4.42 | 17,111 |
| Countries Bordering Saudi Arabia | 0 | - | 4.95 | 118,554 |
| Countries that Beat Saudi Arabia | 0 | - | 4.74 | 46,311 |
| Countries Closest to Yemen | 0 | - | 4.91 | 22,513 |
| Countries Closest to Cyprus | 0 | - | 4.91 | 55,457 |
| Countries Closest to Indonesia | 0 | - | 4.97 | 104,458 |
| Countries Closest to Vietnam | 0 | - | 4.95 | 93,890 |
| Countries Bordering Myanmar | 0 | - | 4.87 | 77,460 |
| Geography of China | 0 | - | 4.21 | 13,939 |
| Chinese Inventions | 0 | - | 4.30 | 33,789 |
| Countries that Border China | 0 | - | 4.96 | 262,936 |
| Countries that Visit Japan the Most | 0 | - | 4.93 | 77,357 |
| Most-Visited Countries by Japanese | 0 | - | 4.95 | 60,070 |
| Countries that Beat Japan | 0 | - | 4.41 | 67,900 |
| Countries Closest to Japan | 0 | - | 4.92 | 138,517 |
| Closest Countries to North Korea | 0 | - | 4.94 | 122,306 |
| Countries that Beat North Korea | 0 | - | 4.43 | 34,321 |
| Bhutan Country Quiz | 0 | - | 4.87 | 24,196 |
| Countries with the Most Hindus | 0 | - | 4.90 | 122,899 |
| Hindu Countries | 0 | - | 4.86 | 50,050 |
| Countries that Beat the United States | 0 | - | 4.93 | 166,646 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,424 |
| Countries that Beat Canada | 0 | - | 4.90 | 87,329 |
| Countries that Beat Russia | 0 | - | 4.81 | 82,508 |
| French Geography Quiz #2 | 0 | - | 4.62 | 23,207 |
| The Trojan War | 0 | - | 4.83 | 39,671 |
| Famous Ancient Romans | 0 | - | 4.70 | 85,412 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,633 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,447 |
| Roman Emperors | 0 | - | 4.95 | 119,734 |
| Countries that Beat Iceland | 0 | - | 4.81 | 42,692 |
| Countries that Beat Portugal | 0 | - | 4.86 | 59,192 |
| Geography of Spain | 0 | - | 4.59 | 22,060 |
| People Buried at Westminster Abbey | 0 | - | 4.67 | 14,243 |
| British History Quiz for Dummies | 0 | - | 4.70 | 78,509 |
| Countries and States in the Caucasus | 0 | - | 4.46 | 51,468 |
| Asian Countries by Borders in 30 Seconds | 0 | - | 4.45 | 414,752 |
| Turkmenistan Country Quiz | 0 | - | 4.81 | 25,936 |
| The Only Remaining Asian Country . . . | 0 | - | 4.64 | 45,749 |
| Middle Eastern Geography Quiz | 0 | - | 4.57 | 43,744 |
| Which City in the Middle East? | 0 | - | 4.47 | 67,088 |
| Qatar Country Quiz | 0 | - | 4.86 | 31,479 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 69,751 |
| Biggest Trading Partners - Turkey | 0 | - | 4.81 | 50,665 |
| History of Egypt | 0 | - | 4.58 | 24,012 |
| Countries Closest to Egypt | 0 | - | 4.83 | 100,955 |
| Countries Closest to Israel | 0 | - | 4.69 | 105,817 |
| Oman Country Quiz | 0 | - | 4.86 | 26,871 |
| Brunei Country Quiz | 0 | - | 4.87 | 21,906 |
| Countries that Beat China | 0 | - | 4.86 | 115,557 |
| The Life of Gandhi | 0 | - | 4.37 | 13,050 |
| Colonies of Africa with a Map | 0 | - | 4.78 | 54,373 |
| Random Sequential Oceanic Countries on a Map | 0 | - | 4.97 | 27,118 |
| Names of Generations | 0 | - | 4.10 | 44,484 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 426,090 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 381,218 |
| American History Quotes #1 | 0 | - | 4.37 | 95,978 |
| American History Quotes #2 | 0 | - | 4.38 | 41,382 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,219 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 529,052 |
| History of Russia Quiz | 0 | - | 4.49 | 31,895 |
| History of Italy | 0 | - | 4.55 | 31,949 |
| Biggest Roman Empire Countries | 0 | - | 4.87 | 101,787 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,632 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,183 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,810 |
| Asian Physical Geography | 0 | - | 4.60 | 35,492 |
| East Asian Islands on the Map | 0 | - | 4.54 | 33,064 |
| 10 Westernmost Countries in Asia | 0 | - | 4.69 | 71,131 |
| Asian Island Nations | 0 | - | 4.63 | 94,116 |
| Asia's Busiest Airports | 0 | - | 4.77 | 52,698 |
| Arab Spring Countries | 0 | - | 4.51 | 43,991 |
| Countries Surrounding Istanbul | 0 | - | 4.89 | 24,815 |
| 10 Plagues of Egypt | 0 | - | 4.41 | 53,789 |
| Israel Immigration by Country | 0 | - | 4.29 | 36,063 |
| The Vietnam War | 0 | - | 4.44 | 35,492 |
| Mongolia Country Quiz | 0 | - | 4.73 | 39,505 |
| Taiwan Country Quiz | 0 | - | 4.69 | 43,480 |
| Afghanistan Country Quiz | 0 | - | 4.45 | 43,249 |
| Kazakhstan Country Quiz | 0 | - | 4.74 | 36,119 |
| Bangladesh Country Quiz | 0 | - | 4.78 | 43,060 |
| Pakistan Country Quiz | 0 | - | 4.54 | 61,682 |
| India Country Quiz | 0 | - | 4.44 | 130,417 |
| India Cities Map Quiz | 0 | - | 4.64 | 61,042 |
| Countries of the Indian Diaspora | 0 | - | 4.48 | 58,974 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 267,974 |
| History of South Africa | 0 | - | 4.60 | 17,666 |
| Word Chain - Australia | 0 | - | 4.38 | 38,125 |
| U.S. State Nicknames | 0 | - | 4.47 | 50,474 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 191,473 |
