| Countries that Border Iraq | 0 | - | 4.97 | 108,271 |
| Africa Geography Quiz #1 | 0 | - | 4.93 | 49,302 |
| Byzantine History | 0 | - | 4.91 | 28,763 |
| Asian Countries with the Shortest Names | 0 | - | 4.97 | 135,119 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,676 |
| Asia Geography Quiz #1 | 0 | - | 4.70 | 53,482 |
| Asia Geography Quiz #2 | 0 | - | 4.56 | 48,517 |
| Asia Geography Quiz #3 | 0 | - | 4.49 | 32,231 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.85 | 109,809 |
| Category Elimination - Asian Geography #2 | 0 | - | 4.94 | 96,636 |
| 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 | 95,181 |
| Iraq Country Quiz | 0 | - | 4.43 | 40,899 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,447,178 |
| Asia Map Quiz | 0 | - | 4.99 | 915,198 |
| Egypt Country Quiz | 0 | - | 4.83 | 77,452 |
| Countries that Beat Indonesia | 0 | - | 4.86 | 55,730 |
| Olympian Gods Quiz | 0 | - | 4.96 | 499,940 |
| Middle East Map Quiz | 0 | - | 4.99 | 1,381,742 |
| Geography of Egypt | 0 | - | 4.60 | 21,500 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,326,834 |
| Ancient Greek Words | 0 | - | 4.93 | 111,428 |
| Flags of Asia Quiz | 0 | - | 4.99 | 612,050 |
| South and Central Asia Map Quiz | 0 | - | 4.94 | 98,752 |
| Countries that Beat Egypt | 0 | - | 4.88 | 56,913 |
| 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 | 71,890 |
| 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 | 31,913 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 436,517 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,034 |
| East Asia Cities Map Quiz | 0 | - | 4.96 | 110,125 |
| 10 Biggest Asian Countries by Area | 0 | - | 4.97 | 153,596 |
| 10 Southernmost Countries in Asia | 0 | - | 4.97 | 99,019 |
| 10 Easternmost Countries in Asia | 0 | - | 4.99 | 107,862 |
| Countries of Asia with Two or More Words | 0 | - | 4.96 | 126,718 |
| Asian Countries Ending in "IA" | 0 | - | 4.96 | 107,345 |
| Top Asian Languages on a Map | 0 | - | 4.95 | 71,314 |
| Countries of Asia with an Empty Map | 0 | - | 4.98 | 230,112 |
| All First-Level Subdivisions of Asia on a Map | 0 | - | 4.91 | 49,803 |
| Countries of the Middle East | 0 | - | 4.96 | 200,870 |
| Countries Kim Jong Un Has Been To | 0 | - | 4.95 | 32,753 |
| States of India | 0 | - | 4.95 | 192,843 |
| History of India | 0 | - | 4.62 | 21,406 |
| Countries with the Most Ascents of Mount Everest | 0 | - | 4.95 | 58,159 |
| Nepal Country Quiz | 0 | - | 4.95 | 37,677 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 92,174 |
| Name a Valid African Country | 0 | - | 4.98 | 153,864 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 120,984 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 174,266 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 232,799 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 276,459 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 166,826 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,978 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 78,626 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,382 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,781 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 260,288 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 114,448 |
| Figures from Greek Mythology | 0 | - | 4.91 | 186,575 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,329 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 66,429 |
| 10 Asian Countries with the Most Tourists | 0 | - | 4.89 | 105,832 |
| Top 10 Coldest Asian Countries | 0 | - | 4.95 | 122,894 |
| Asian Countries with the Most Christians | 0 | - | 4.85 | 97,089 |
| Pixelated Asia Map | 0 | - | 4.90 | 73,051 |
| Monarchies of Asia | 0 | - | 4.97 | 71,010 |
| Asian Country Superlatives | 0 | - | 4.84 | 80,795 |
| Flags of the Middle East | 0 | - | 4.69 | 62,580 |
| Countries Closest to the Persian Gulf | 0 | - | 4.93 | 83,306 |
| History of Iran | 0 | - | 4.66 | 16,344 |
| Iran Country Quiz | 0 | - | 4.51 | 60,295 |
| Provinces of Turkey | 0 | - | 4.95 | 203,790 |
| Syria Country Quiz | 0 | - | 4.81 | 32,704 |
| Jordan Country Quiz | 0 | - | 4.86 | 31,705 |
| Countries with the Most Arabic Speakers | 0 | - | 4.92 | 79,981 |
| Countries in Southeast Asia With an Empty Map | 0 | - | 4.97 | 101,361 |
| Provinces of China | 0 | - | 4.97 | 203,749 |
| China Cities Map Quiz | 0 | - | 4.93 | 104,999 |
| Provinces of China Map Quiz | 0 | - | 4.92 | 93,474 |
| History of China | 0 | - | 4.37 | 57,090 |
| Japanese Prefectures | 0 | - | 4.98 | 136,551 |
| Japan Country Quiz | 0 | - | 4.93 | 142,288 |
| 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 | 62,896 |
| Countries Closest to India | 0 | - | 4.97 | 102,680 |
| Oceania Geography Quiz | 0 | - | 4.55 | 22,041 |
| 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 | 3,690,852 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,593 |
| 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 | 58,426 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 89,873 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 646,460 |
| Name that Greek Letter | 0 | - | 4.93 | 323,209 |
| Name the English Monarchs | 0 | - | 4.91 | 501,821 |
| Prime Ministers of the UK | 0 | - | 4.95 | 438,173 |
| Asian Last Names in the United States | 0 | - | 4.43 | 46,727 |
| Top 10 Asian Countries by Coastline | 0 | - | 4.92 | 96,401 |
| Countries that Have Controlled Mesopotamia | 0 | - | 4.15 | 15,550 |
| Countries Closest to Turkey | 0 | - | 4.96 | 125,931 |
| Countries Bordering Turkey | 0 | - | 4.98 | 117,037 |
| Ottoman Empire Quiz | 0 | - | 4.42 | 17,111 |
| Countries Bordering Saudi Arabia | 0 | - | 4.95 | 118,553 |
| Countries that Beat Saudi Arabia | 0 | - | 4.74 | 46,310 |
| Countries Closest to Yemen | 0 | - | 4.91 | 22,513 |
| Countries Closest to Cyprus | 0 | - | 4.91 | 55,455 |
| Countries Closest to Indonesia | 0 | - | 4.97 | 104,458 |
| Countries Closest to Vietnam | 0 | - | 4.95 | 93,888 |
| Countries Bordering Myanmar | 0 | - | 4.87 | 77,457 |
| Geography of China | 0 | - | 4.21 | 13,939 |
| Chinese Inventions | 0 | - | 4.30 | 33,789 |
| Countries that Border China | 0 | - | 4.96 | 262,934 |
| Countries that Visit Japan the Most | 0 | - | 4.93 | 77,357 |
| Most-Visited Countries by Japanese | 0 | - | 4.95 | 60,069 |
| Countries that Beat Japan | 0 | - | 4.41 | 67,900 |
| Countries Closest to Japan | 0 | - | 4.92 | 138,515 |
| Closest Countries to North Korea | 0 | - | 4.94 | 122,305 |
| 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 | 122,898 |
| Hindu Countries | 0 | - | 4.86 | 50,048 |
| Countries that Beat the United States | 0 | - | 4.93 | 166,640 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,422 |
| Countries that Beat Canada | 0 | - | 4.90 | 87,325 |
| 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 | 85,410 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,627 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,446 |
| Roman Emperors | 0 | - | 4.95 | 119,732 |
| Countries that Beat Iceland | 0 | - | 4.81 | 42,691 |
| Countries that Beat Portugal | 0 | - | 4.86 | 59,192 |
| Geography of Spain | 0 | - | 4.59 | 22,059 |
| 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 | 414,746 |
| 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 | 43,743 |
| Which City in the Middle East? | 0 | - | 4.47 | 67,087 |
| Qatar Country Quiz | 0 | - | 4.86 | 31,479 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 69,748 |
| Biggest Trading Partners - Turkey | 0 | - | 4.81 | 50,664 |
| History of Egypt | 0 | - | 4.58 | 24,012 |
| Countries Closest to Egypt | 0 | - | 4.83 | 100,953 |
| Countries Closest to Israel | 0 | - | 4.69 | 105,796 |
| Oman Country Quiz | 0 | - | 4.86 | 26,871 |
| Brunei Country Quiz | 0 | - | 4.87 | 21,905 |
| 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 | 54,372 |
| Random Sequential Oceanic Countries on a Map | 0 | - | 4.97 | 27,117 |
| Names of Generations | 0 | - | 4.10 | 44,468 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 426,083 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 381,212 |
| American History Quotes #1 | 0 | - | 4.37 | 95,975 |
| American History Quotes #2 | 0 | - | 4.38 | 41,381 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,219 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 529,039 |
| History of Russia Quiz | 0 | - | 4.49 | 31,895 |
| History of Italy | 0 | - | 4.55 | 31,949 |
| Biggest Roman Empire Countries | 0 | - | 4.87 | 101,786 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,632 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,182 |
| 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 | 33,063 |
| 10 Westernmost Countries in Asia | 0 | - | 4.69 | 71,128 |
| Asian Island Nations | 0 | - | 4.63 | 94,115 |
| Asia's Busiest Airports | 0 | - | 4.77 | 52,698 |
| Arab Spring Countries | 0 | - | 4.51 | 43,991 |
| Countries Surrounding Istanbul | 0 | - | 4.89 | 24,814 |
| 10 Plagues of Egypt | 0 | - | 4.41 | 53,789 |
| Israel Immigration by Country | 0 | - | 4.29 | 36,061 |
| The Vietnam War | 0 | - | 4.44 | 35,492 |
| Mongolia Country Quiz | 0 | - | 4.73 | 39,504 |
| Taiwan Country Quiz | 0 | - | 4.69 | 43,479 |
| 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 | 61,681 |
| India Country Quiz | 0 | - | 4.44 | 130,415 |
| India Cities Map Quiz | 0 | - | 4.64 | 61,042 |
| Countries of the Indian Diaspora | 0 | - | 4.48 | 58,967 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 267,973 |
| 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 | 191,467 |
