| Metals of Antiquity | 0 | - | 4.94 | 93,092 |
| Rocks and Minerals Picture Quiz | 0 | - | 4.48 | 29,220 |
| Former Countries by Territory Map | 0 | - | 4.96 | 102,021 |
| Empires by Maps | 0 | - | 4.98 | 119,142 |
| Animals by Skeleton Image | 0 | - | 4.80 | 46,146 |
| Merged Company Logos #1 | 0 | - | 4.91 | 105,762 |
| Planets By Picture Quiz | 0 | - | 4.49 | 56,409 |
| Islands by Shape #2 | 0 | - | 4.88 | 59,089 |
| Visual Memory Test - Random Cartoons | 0 | - | 4.98 | 103,264 |
| Play-Doh People from History | 0 | - | 4.99 | 94,195 |
| Famous Landmarks Out Of Focus #1 | 0 | - | 4.89 | 60,560 |
| Jeppy in Disguise #1 | 0 | - | 4.92 | 48,946 |
| Jeppy in Disguise #2 | 0 | - | 4.96 | 49,141 |
| Circular Cutouts from a World Map | 0 | - | 4.98 | 61,211 |
| All Country Flags of the World | 0 | - | 5.00 | 3,623,613 |
| Elements Named for Countries | 0 | - | 4.52 | 24,523 |
| Country Flags Quiz #1 | 0 | - | 4.98 | 2,530,231 |
| Country Flags Quiz #2 | 0 | - | 4.98 | 1,089,246 |
| Country Flags Quiz #3 | 0 | - | 4.98 | 731,000 |
| Years in History by Picture | 0 | - | 4.44 | 35,270 |
| Make a Stained Glass Window | 0 | - | 5.00 | 68,067 |
| Famous Foreheads #1 | 0 | - | 4.47 | 74,465 |
| Flags with Crescents | 0 | - | 4.98 | 168,217 |
| Country Flag Trivia | 0 | - | 4.81 | 56,260 |
| Country Flags with Eagles - Picture Quiz | 0 | - | 4.98 | 102,824 |
| Country Flags with the Union Jack | 0 | - | 4.87 | 76,778 |
| Pixelated Flag Quiz | 0 | - | 4.98 | 86,374 |
| Flag Emblems Scavenger Hunt | 0 | - | 5.00 | 66,734 |
| Flags by Horizontal Stripes #1 | 0 | - | 4.84 | 84,635 |
| Country Flags with the Sun - Picture Quiz | 0 | - | 4.83 | 52,309 |
| Real vs. Fake Flags | 0 | - | 4.98 | 123,099 |
| National Football Team Logos | 0 | - | 4.85 | 179,363 |
| Merged Company Logos #2 | 0 | - | 4.75 | 77,032 |
| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.97 | 109,591 |
| Name that Object #1 | 0 | - | 3.56 | 96,349 |
| Flags to Languages | 0 | - | 4.95 | 172,905 |
| Similar Country Flags - Multiple Choice Quiz | 0 | - | 4.94 | 50,181 |
| The Voyage of Darwin - Animated Map Quiz | 0 | - | 4.99 | 14,403 |
| Countries Reducing Carbon Dioxide Emissions the Most | 0 | - | 4.89 | 64,375 |
| Countries with the Most Forest | 0 | - | 4.87 | 146,828 |
| Countries with Glaciers | 0 | - | 4.97 | 104,809 |
| Fruits by Picture | 0 | - | 4.20 | 805,609 |
| Old Movies by Picture | 0 | - | 4.51 | 24,927 |
| Musical Instruments by Picture #2 | 0 | - | 4.24 | 46,800 |
| Geography by Picture - B | 0 | - | 4.42 | 55,482 |
| Geography by Picture - H | 0 | - | 4.50 | 58,098 |
| Geography by Picture - N | 0 | - | 4.45 | 42,095 |
| Geography by Picture - R | 0 | - | 4.56 | 40,923 |
| Geography by Picture - T | 0 | - | 4.54 | 57,733 |
| Random Logos Quiz | 0 | - | 4.31 | 207,522 |
| All North American Pro Sports Logos | 0 | - | 4.70 | 113,956 |
| Pictures by Letter - A | 0 | - | 4.17 | 33,231 |
| Pictures by Letter - J | 0 | - | 4.31 | 39,835 |
| Pictures by Letter - B | 0 | - | 4.31 | 43,720 |
| Pictures by Letter - D | 0 | - | 4.16 | 37,411 |
| Pictures by Letter - M | 0 | - | 4.24 | 37,626 |
| Body Parts in History and Culture | 0 | - | 4.42 | 35,190 |
| Three Real and One Fake - Country Flags | 0 | - | 4.97 | 83,545 |
| Pick a Picture - Animal Relations | 0 | - | 4.94 | 55,052 |
| Name that Historical Figure #1 | 0 | - | 4.63 | 336,300 |
| Name the Pixelated Landmark | 0 | - | 4.84 | 62,659 |
| Car Logos Quiz #1 | 0 | - | 4.44 | 534,840 |
| Name the Constellations - With a Map | 0 | - | 4.92 | 35,755 |
| Name that Bug | 0 | - | 4.12 | 45,492 |
| Islands by Shape #1 | 0 | - | 4.32 | 84,234 |
| 1970s Celebrities by Picture #1 | 0 | - | 4.20 | 57,735 |
| 1970s Celebrities by Picture #2 | 0 | - | 4.21 | 50,501 |
| Name that Object #2 | 0 | - | 3.64 | 15,356 |
| Islands by Picture | 0 | - | 4.29 | 106,282 |
| Name that Object #3 | 0 | - | 3.93 | 14,326 |
| Classic Movies by Movie Posters | 0 | - | 4.45 | 24,140 |
| 1980s Movie Silhouettes | 0 | - | 4.97 | 103,117 |
| Famous Landmarks Out Of Focus #2 | 0 | - | 4.37 | 40,974 |
| Animals by Close-up Image | 0 | - | 4.42 | 217,251 |
| Aquatic Mammals by Picture | 0 | - | 4.41 | 45,399 |
| Extinct Animals by Picture | 0 | - | 4.49 | 35,036 |
| Mammals by Picture #1 | 0 | - | 4.70 | 91,373 |
| 1940s Celebrities by Picture | 0 | - | 4.43 | 47,854 |
| International Footballers by Picture | 0 | - | 4.50 | 55,068 |
| Name that Historical Figure #2 | 0 | - | 4.41 | 283,452 |
| Name that Historical Figure #5 | 0 | - | 4.43 | 107,056 |
| Name that Historical Figure #7 - U.S. Edition | 0 | - | 4.50 | 50,528 |
| Geography by Picture - A | 0 | - | 4.39 | 60,113 |
| Geography by Picture - D | 0 | - | 4.15 | 45,548 |
| Geography by Picture - F | 0 | - | 4.31 | 50,881 |
| Geography by Picture - G | 0 | - | 4.38 | 47,852 |
| Geography by Picture - J | 0 | - | 4.16 | 38,372 |
| Geography by Picture - K | 0 | - | 4.29 | 33,046 |
| Geography by Picture - C | 0 | - | 4.31 | 56,976 |
| Geography by Picture - L | 0 | - | 4.37 | 58,830 |
| Geography by Picture - M | 0 | - | 4.14 | 40,372 |
| Geography by Picture - P | 0 | - | 4.24 | 42,342 |
| Geography by Picture - S | 0 | - | 4.38 | 46,957 |
| Miscellaneous Flags Quiz | 0 | - | 4.42 | 279,132 |
| Country Flags Multiple Choice | 0 | - | 4.97 | 143,868 |
| Flag Maths | 0 | - | 4.63 | 57,699 |
| Satellite Images #1 | 0 | - | 4.46 | 129,144 |
| Satellite Images Quiz #2 | 0 | - | 4.63 | 109,108 |
| Satellite Images Quiz #4 | 0 | - | 4.55 | 88,750 |
| Satellite Images Quiz #5 | 0 | - | 4.52 | 49,747 |
| Satellite Images Quiz #6 | 0 | - | 4.50 | 38,871 |
| Cities by Picture #1 | 0 | - | 4.73 | 85,590 |
| Soccer Team Logos | 0 | - | 4.26 | 372,233 |
| Brand Logos Quiz #1 | 0 | - | 4.83 | 2,409,556 |
| Ultimate Car Logos Quiz | 0 | - | 4.80 | 177,744 |
| Car Logos Quiz #2 | 0 | - | 4.43 | 260,319 |
| Video Game Logos Quiz | 0 | - | 4.40 | 183,158 |
| Movie Logos | 0 | - | 4.33 | 236,817 |
| Brand Logos That Start With M | 0 | - | 4.45 | 62,144 |
| Brand Logos That Start with A | 0 | - | 4.51 | 69,673 |
| Pictures by Letter - E | 0 | - | 3.49 | 34,354 |
| Pictures by Letter - G | 0 | - | 4.14 | 28,002 |
| Pictures by Letter - L | 0 | - | 4.14 | 30,411 |
| Pictures by Letter - F | 0 | - | 4.17 | 28,892 |
| Pictures by Letter - Z | 0 | - | 4.05 | 23,357 |
| Pictures by Letter - Y | 0 | - | 4.22 | 26,171 |
| Pictures by Letter - R | 0 | - | 4.09 | 24,656 |
| Pictures by Letter - K | 0 | - | 4.18 | 24,994 |
| Pictures by Letter - I | 0 | - | 4.16 | 30,257 |
| Pictures by Letter - N | 0 | - | 4.11 | 24,386 |
| Pictures by Letter - P | 0 | - | 4.05 | 25,928 |
| Pictures by Letter - U | 0 | - | 4.10 | 20,684 |
| Pictures by Letter - T | 0 | - | 4.34 | 27,552 |
| History by Picture - A | 0 | - | 4.25 | 45,608 |
| History by Picture - B | 0 | - | 4.40 | 48,741 |
| History by Picture - C | 0 | - | 4.36 | 54,254 |
| History by Picture - F | 0 | - | 4.35 | 37,720 |
| History by Picture - G | 0 | - | 4.40 | 41,980 |
| History by Picture - D | 0 | - | 4.29 | 44,140 |
| History by Picture - E | 0 | - | 4.27 | 43,763 |
| History by Picture - H | 0 | - | 4.37 | 36,655 |
| History by Picture - K | 0 | - | 4.35 | 33,214 |
| History by Picture - M | 0 | - | 4.17 | 36,013 |
| History by Picture - N | 0 | - | 4.40 | 41,100 |
| History by Picture - O | 0 | - | 4.39 | 36,156 |
| History by Picture - T | 0 | - | 4.20 | 33,192 |
| Name that Nut, Seed, or Bean | 0 | - | 4.63 | 56,997 |
| Animals - Taxonomy to Common Name | 0 | - | 4.80 | 28,169 |
| Countries with the Most HIV | 0 | - | 4.46 | 44,371 |
| Countries with the Most Malaria Deaths | 0 | - | 4.45 | 45,039 |
| Countries that Desalinate the Most Water | 0 | - | 4.77 | 41,450 |
| Art Works Picture Quiz #1 | 0 | - | 4.51 | 118,689 |
| Art Works Picture Quiz #2 | 0 | - | 4.49 | 104,933 |
| Musical Instruments by Picture #1 | 0 | - | 4.52 | 268,308 |
| Flowers by Picture | 0 | - | 4.46 | 105,109 |
| Art Works Picture Quiz #3 | 0 | - | 4.45 | 48,607 |
| Authors by Picture | 0 | - | 4.48 | 25,449 |
| Fruit and Vegetable Emojis | 0 | - | 4.42 | 79,756 |
| WWII Figures by Picture | 0 | - | 4.89 | 61,709 |
| College Sports Logos Quiz #3 | 0 | - | 4.30 | 55,360 |
| Songs by Picture Quiz #1 | 0 | - | 4.68 | 65,585 |
| Songs by Picture Quiz #2 | 0 | - | 4.42 | 58,599 |
| Fish by Picture #1 | 0 | - | 4.41 | 108,268 |
| Animals A-Z by Picture | 0 | - | 4.08 | 66,110 |
| Mammals by Picture #3 | 0 | - | 4.39 | 61,901 |
| Mammals by Picture #4 | 0 | - | 4.03 | 34,002 |
| Birds by Picture #1 | 0 | - | 4.47 | 41,322 |
| Mammals by Picture #2 | 0 | - | 4.28 | 58,018 |
| Oscar Nominated Actors by Picture #1 | 0 | - | 4.42 | 164,675 |
| 1960s Celebrities by Picture #1 | 0 | - | 4.27 | 70,158 |
| 1960s Celebrities by Picture #2 | 0 | - | 4.26 | 51,234 |
| 1950s Celebrities by Picture #1 | 0 | - | 4.24 | 51,012 |
| 1980s Celebrities by Picture #2 | 0 | - | 4.19 | 71,419 |
| 1990s Celebrities by Picture #1 | 0 | - | 4.13 | 79,145 |
| 1990s Celebrities by Picture #2 | 0 | - | 4.16 | 72,100 |
| 2000s Celebrities by Picture #2 | 0 | - | 4.15 | 94,843 |
| 1950s Celebrities by Picture #2 | 0 | - | 4.29 | 46,000 |
| Name that Historical Figure #3 | 0 | - | 4.36 | 238,471 |
| Name that Historical Figure #4 | 0 | - | 4.29 | 158,492 |
| Name that Historical Figure #6 | 0 | - | 4.27 | 92,809 |
| Musicians by Picture #1 | 0 | - | 4.39 | 107,744 |
| Musicians by Picture #2 | 0 | - | 4.29 | 75,705 |
| Musicians by Picture #4 | 0 | - | 4.07 | 64,345 |
| Musicians by Picture #3 | 0 | - | 4.10 | 58,562 |
| Emoji Flags | 0 | - | 4.35 | 43,902 |
| Fill the Map of Europe by Guessing Flag Colors | 0 | - | 4.64 | 37,607 |
| Languages by Combined Flags | 0 | - | 4.53 | 99,461 |
| Satellite Images Quiz #3 | 0 | - | 4.35 | 73,300 |
| Satellite Images - Island Chains | 0 | - | 4.43 | 65,978 |
| Islands by Satellite Image #1 | 0 | - | 4.70 | 70,333 |
| Peninsulas by Satellite Image | 0 | - | 4.53 | 27,713 |
| Landmarks Picture Quiz #1 | 0 | - | 4.16 | 393,551 |
| Airline Logos | 0 | - | 4.45 | 140,210 |
| Fast Food Logos Quiz | 0 | - | 4.44 | 247,454 |
| Mostly-American Candy Logos | 0 | - | 4.14 | 158,267 |
| Brand Logos That Start With S | 0 | - | 4.37 | 57,054 |
| Brand Logos That Start With B | 0 | - | 4.38 | 59,531 |
| Brand Logos That Start With D | 0 | - | 4.37 | 61,018 |
| Brand Logos That Start With L | 0 | - | 4.39 | 60,559 |
| Brand Logos That Start With C | 0 | - | 4.17 | 49,257 |
| Vegetables by Picture | 0 | - | 4.39 | 63,055 |
| Pick a Picture - Musical Instruments | 0 | - | 4.53 | 52,027 |
| Albert Einstein Trivia | 0 | - | 4.58 | 18,337 |
| Animal Anatomy Quiz | 0 | - | 4.39 | 59,730 |
| Organs of the Human Body (with map) | 0 | - | 4.11 | 118,798 |
| Countries with the Most Mangroves | 0 | - | 4.53 | 34,524 |
| Worst Plastic Polluting Countries | 0 | - | 4.51 | 66,244 |
| Least-Forested Countries | 0 | - | 4.53 | 65,001 |
| Tropical Rainforest Countries | 0 | - | 4.68 | 81,841 |
| Northernmost Countries Without Glaciers | 0 | - | 4.61 | 36,097 |
