| Southernmost Countries A-Z | 0 | - | 4.94 | 152,893 |
| Northernmost Countries A-Z | 0 | - | 4.99 | 194,251 |
| Least Populous Countries A-Z | 0 | - | 4.99 | 169,565 |
| Biggest Countries by Area A-Z | 0 | - | 4.96 | 191,084 |
| Most Populous Countries A-Z | 0 | - | 4.98 | 299,679 |
| Countries with the Greatest Elevation A-Z | 0 | - | 4.83 | 72,306 |
| Former Countries by Territory Map | 0 | - | 4.96 | 101,863 |
| Empires by Maps | 0 | - | 4.98 | 118,903 |
| Capitals A-Z #1 | 0 | - | 4.86 | 51,208 |
| Shortest Country Name A-Z | 0 | - | 5.00 | 235,359 |
| Richest Countries A-Z | 0 | - | 4.92 | 102,140 |
| Countries with the Most Borders A-Z | 0 | - | 4.98 | 124,982 |
| A-Z Cities by Pictures | 0 | - | 4.56 | 43,603 |
| WWII Figures by Picture | 0 | - | 4.85 | 50,686 |
| Name a Valid Country A-Z | 0 | - | 4.98 | 120,452 |
| 17th Century A-Z | 0 | - | 4.78 | 34,205 |
| Countries that Start with a Vowel | 0 | - | 4.98 | 129,044 |
| Art Works Picture Quiz #1 | 0 | - | 4.51 | 118,609 |
| Art Works Picture Quiz #2 | 0 | - | 4.49 | 104,838 |
| Art Works Picture Quiz #3 | 0 | - | 4.45 | 48,578 |
| World Cities A-Z by Clue #1 | 0 | - | 4.50 | 66,845 |
| World Cities A-Z by Clue #2 | 0 | - | 4.41 | 58,218 |
| Asian Cities A-Z by Clue | 0 | - | 4.51 | 34,841 |
| Africa A-Z | 0 | - | 4.57 | 46,423 |
| Former Flags | 0 | - | 4.97 | 106,936 |
| Years in History by Picture | 0 | - | 4.44 | 35,201 |
| Middle East A-Z | 0 | - | 4.47 | 45,860 |
| World Cities Based on Location A-Z - #1 | 0 | - | 4.45 | 44,200 |
| Military History Vocabulary | 0 | - | 4.91 | 66,747 |
| Military History A-Z | 0 | - | 4.20 | 21,070 |
| Countries that Start with A | 0 | - | 4.98 | 2,150,323 |
| Countries that Start with B | 0 | - | 4.95 | 2,282,962 |
| Countries that Start with C | 0 | - | 4.96 | 1,812,805 |
| Countries that Start with D | 0 | - | 4.96 | 703,271 |
| Countries that Start with E | 0 | - | 4.95 | 1,369,550 |
| Countries that Start with G | 0 | - | 4.97 | 1,494,990 |
| Countries that Start with H | 0 | - | 4.96 | 599,357 |
| Countries that Start with I | 0 | - | 4.92 | 1,281,953 |
| Countries that Start with J | 0 | - | 4.98 | 597,421 |
| Countries that Start with K | 0 | - | 4.97 | 810,676 |
| Countries that Start with L | 0 | - | 4.98 | 1,084,494 |
| Countries that Start with N | 0 | - | 4.93 | 1,111,417 |
| Countries that Start with P | 0 | - | 4.94 | 1,210,084 |
| Countries that Start with S | 0 | - | 4.98 | 1,746,765 |
| Countries that Start with T | 0 | - | 4.90 | 1,005,406 |
| Countries that Start with U | 0 | - | 4.97 | 900,880 |
| Countries that Start with V | 0 | - | 4.98 | 605,976 |
| Countries that Start with F | 0 | - | 4.83 | 613,377 |
| Countries that Start with M | 0 | - | 4.97 | 1,375,121 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 66,113 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,516 |
| European Geography By Letter - B #2 | 0 | - | 4.84 | 76,506 |
| Time Magazine Person of the Year | 0 | - | 4.53 | 73,677 |
| Countries That Were Invaded | 0 | - | 4.54 | 97,013 |
| Name that Historical Figure #1 | 0 | - | 4.63 | 335,976 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,345 |
| Canada A-Z | 0 | - | 4.73 | 32,688 |
| Four Letter Geography A-Z #1 | 0 | - | 4.60 | 32,078 |
| Four Letter Geography A-Z #2 | 0 | - | 4.56 | 34,515 |
| Normandy D-Day Beaches | 0 | - | 4.83 | 40,180 |
| Territory Changes in World War I | 0 | - | 4.86 | 46,310 |
| The Bible A-Z | 0 | - | 4.29 | 59,444 |
| Capitals A-Z #2 | 0 | - | 4.45 | 26,666 |
| European Geography A-Z | 0 | - | 4.28 | 49,054 |
| Countries with the Most Forest A-Z | 0 | - | 4.63 | 55,255 |
| "Second Best" History Edition | 0 | - | 4.94 | 62,144 |
| G7 Leaders Since 2003 | 0 | - | 4.48 | 46,184 |
| WWII A-Z #1 | 0 | - | 4.80 | 102,512 |
| WWII A-Z #2 | 0 | - | 4.44 | 54,393 |
| WWII Geography | 0 | - | 4.81 | 119,506 |
| Name that Historical Figure #2 | 0 | - | 4.43 | 283,132 |
| Name that Historical Figure #5 | 0 | - | 4.43 | 106,898 |
| One Country By Letter By Continent | 0 | - | 5.00 | 122,199 |
| One Capital by Letter by Continent | 0 | - | 4.98 | 17,063 |
| American Football A-Z | 0 | - | 4.26 | 14,483 |
| MLB Baseball A-Z #2 | 0 | - | 4.11 | 17,024 |
| France A-Z | 0 | - | 4.16 | 38,092 |
| Switzerland A-Z | 0 | - | 4.45 | 25,541 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,228 |
| Name a Country A-Z | 0 | - | 5.00 | 241,084 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,034 |
| Famous Dictators #1 | 0 | - | 4.69 | 198,980 |
| Ultimate 20th Century History Quiz | 0 | - | 4.86 | 53,348 |
| WWI... or WWII? | 0 | - | 4.85 | 140,978 |
| Famous Battles Quiz | 0 | - | 4.21 | 48,862 |
| Name the War | 0 | - | 4.37 | 200,997 |
| Famous U.S. Generals | 0 | - | 4.27 | 38,440 |
| Names for Warriors | 0 | - | 4.40 | 36,829 |
| The 7 Wonders of the Ancient World | 0 | - | 4.85 | 82,154 |
| History by Picture - A | 0 | - | 4.25 | 45,529 |
| History by Picture - B | 0 | - | 4.40 | 48,658 |
| History by Picture - C | 0 | - | 4.36 | 54,171 |
| History by Picture - F | 0 | - | 4.35 | 37,663 |
| History by Picture - G | 0 | - | 4.40 | 41,916 |
| History by Picture - D | 0 | - | 4.29 | 44,081 |
| History by Picture - E | 0 | - | 4.27 | 43,695 |
| History by Picture - H | 0 | - | 4.37 | 36,605 |
| History by Picture - K | 0 | - | 4.35 | 33,166 |
| History by Picture - M | 0 | - | 4.17 | 35,967 |
| History by Picture - N | 0 | - | 4.40 | 41,051 |
| History by Picture - O | 0 | - | 4.39 | 36,102 |
| History by Picture - T | 0 | - | 4.20 | 33,149 |
| Countries Bordering "U" Countries | 0 | - | 4.83 | 24,189 |
| Human Body A-Z | 0 | - | 4.51 | 128,728 |
| Animals A-Z #1 | 0 | - | 4.41 | 92,924 |
| African Geography A-Z | 0 | - | 4.33 | 21,436 |
| Diseases and Medical Conditions A-Z | 0 | - | 4.68 | 56,105 |
| Historical Leaders by Date #1 | 0 | - | 4.48 | 31,256 |
| Historical Leaders by Date #2 | 0 | - | 4.55 | 30,096 |
| Historical Rulers #2 | 0 | - | 4.26 | 47,263 |
| Historical Rulers #1 | 0 | - | 4.35 | 118,565 |
| World Leaders Quiz #1 | 0 | - | 4.11 | 109,732 |
| 20th Century A-Z | 0 | - | 4.50 | 53,228 |
| 19th Century A-Z | 0 | - | 4.77 | 46,785 |
| 18th Century A-Z | 0 | - | 4.54 | 42,681 |
| Famous Generals - Non U.S. | 0 | - | 4.58 | 15,037 |
| Name that Historical Figure #3 | 0 | - | 4.36 | 238,099 |
| Name that Historical Figure #4 | 0 | - | 4.29 | 158,302 |
| Name that Historical Figure #6 | 0 | - | 4.27 | 92,648 |
| All Country Flags of the World | 0 | - | 5.00 | 3,615,554 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,307,522 |
| Countries that Start with R | 0 | - | 4.43 | 444,503 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 70,898 |
| European Geography By Letter - A | 0 | - | 4.61 | 132,578 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 111,042 |
| European Geography By Letter - C | 0 | - | 4.46 | 112,006 |
| European Geography By Letter - D | 0 | - | 4.50 | 106,887 |
| European Geography By Letter - L | 0 | - | 4.52 | 112,360 |
| European Geography By Letter - M | 0 | - | 4.64 | 129,145 |
| European Geography By Letter - N | 0 | - | 4.44 | 99,964 |
| European Geography By Letter - R | 0 | - | 4.42 | 92,735 |
| European Geography By Letter - V | 0 | - | 4.43 | 92,109 |
| Asian Geography by Letter - H | 0 | - | 4.49 | 65,464 |
| Asian Geography By Letter - M | 0 | - | 4.47 | 61,221 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 57,638 |
| Asian Geography by Letter - T | 0 | - | 4.50 | 57,136 |
| European Geography By Letter - T | 0 | - | 4.41 | 81,465 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 99,709 |
| Asian Geography By Letter - L | 0 | - | 4.49 | 42,779 |
| South America A-Z | 0 | - | 4.13 | 10,852 |
| Google What's the Difference? - History | 0 | - | 4.20 | 46,077 |
| Metals of Antiquity | 0 | - | 4.94 | 93,029 |
| Popular Royal Names | 0 | - | 4.27 | 124,610 |
| Russian History A-Z | 0 | - | 4.38 | 31,236 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,292 |
| Famous Dictators #2 | 0 | - | 4.31 | 87,180 |
| Mythical Creatures Quiz #1 | 0 | - | 4.92 | 705,026 |
| First Names of Painters | 0 | - | 4.43 | 59,667 |
| Notable People of WWII | 0 | - | 4.53 | 85,385 |
| WWII Trivia #2 | 0 | - | 4.52 | 103,537 |
| World War I Quiz | 0 | - | 4.78 | 100,393 |
| WWI A-Z | 0 | - | 4.50 | 38,069 |
| Women in History by Picture | 0 | - | 4.25 | 25,790 |
| History by Picture - I | 0 | - | 4.26 | 26,069 |
| History by Picture - J | 0 | - | 4.18 | 26,579 |
| History by Picture - L | 0 | - | 4.18 | 30,607 |
| History by Picture - P | 0 | - | 4.08 | 25,158 |
| History by Picture - Q | 0 | - | 4.03 | 21,953 |
| History by Picture - R | 0 | - | 4.13 | 26,691 |
| History by Picture - S | 0 | - | 4.14 | 27,643 |
| History by Picture - U | 0 | - | 4.24 | 24,983 |
| History by Picture - V | 0 | - | 4.30 | 24,962 |
| History by Picture - W | 0 | - | 4.01 | 21,528 |
| Years in History #1 - Multiple Choice | 0 | - | 4.85 | 69,764 |
| Islands by Shape #2 | 0 | - | 4.88 | 59,056 |
| Countries by Road Signs | 0 | - | 4.98 | 53,255 |
| Circular Cutouts from a World Map | 0 | - | 4.98 | 61,146 |
| Country Flags Quiz #1 | 0 | - | 4.98 | 2,528,798 |
| Country Flags Quiz #2 | 0 | - | 4.98 | 1,088,573 |
| Country Flags Quiz #3 | 0 | - | 4.97 | 730,493 |
| Formula One Teams by Logos | 0 | - | 4.49 | 97,493 |
| Most Common English Verbs - Extreme | 0 | - | 4.96 | 156,085 |
| Basketball A-Z | 0 | - | 3.87 | 22,652 |
| MLB Baseball A-Z #1 | 0 | - | 4.00 | 23,045 |
| Mountains A-Z | 0 | - | 3.82 | 10,886 |
| Animals A-Z #2 | 0 | - | 4.12 | 66,115 |
| Influential Women in History | 0 | - | 4.42 | 35,216 |
| Cradles of Civilization | 0 | - | 4.46 | 39,267 |
| History of The Netherlands | 0 | - | 4.46 | 17,343 |
| Materials From History #1 | 0 | - | 4.56 | 51,244 |
| World Leaders Quiz #2 | 0 | - | 4.00 | 35,697 |
| UN Secretaries-General | 0 | - | 4.40 | 7,771 |
| Benevolent Dictators and Enlightened Despots | 0 | - | 4.01 | 19,559 |
| Biggest Nations and Empires Ever | 0 | - | 4.46 | 145,372 |
| Famous Explorers | 0 | - | 4.58 | 36,011 |
| Famous Empires by Description | 0 | - | 4.73 | 118,048 |
| Answers by Time Period | 0 | - | 4.63 | 55,349 |
| 16th Century A-Z | 0 | - | 4.58 | 24,418 |
| 15th Century A-Z | 0 | - | 4.49 | 23,419 |
| 14th Century A-Z | 0 | - | 4.41 | 23,821 |
| Most Important People in History | 0 | - | 3.98 | 50,465 |
| Flags with Crescents | 0 | - | 4.98 | 167,953 |
| Country Flag Trivia | 0 | - | 4.81 | 56,147 |
| Country Flags with Eagles - Picture Quiz | 0 | - | 4.98 | 102,685 |
| Country Flags with the Union Jack | 0 | - | 4.87 | 76,658 |
| Country Flags with the Sun - Picture Quiz | 0 | - | 4.83 | 52,208 |
| National Football Team Logos | 0 | - | 4.84 | 179,071 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 285,636 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 269,314 |
| Countries with NO Military | 0 | - | 4.97 | 61,337 |
